./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-crafted/zero_sum3.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_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-crafted/zero_sum3.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d3267df59902b667587c98ecbe021c99cc3d2a5e5866fbd08ee1fb3133370aa4 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 01:10:06,381 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 01:10:06,449 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 01:10:06,454 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 01:10:06,455 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 01:10:06,478 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 01:10:06,478 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 01:10:06,479 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 01:10:06,480 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 01:10:06,480 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 01:10:06,481 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 01:10:06,481 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 01:10:06,482 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 01:10:06,482 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 01:10:06,483 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 01:10:06,483 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 01:10:06,484 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 01:10:06,484 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 01:10:06,485 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 01:10:06,485 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 01:10:06,486 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 01:10:06,490 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 01:10:06,490 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 01:10:06,491 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 01:10:06,491 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 01:10:06,491 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 01:10:06,492 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 01:10:06,492 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 01:10:06,493 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 01:10:06,493 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 01:10:06,493 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 01:10:06,494 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 01:10:06,494 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 01:10:06,494 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 01:10:06,495 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 01:10:06,495 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 01:10:06,495 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 01:10:06,495 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 01:10:06,495 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 01:10:06,495 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 01:10:06,496 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 01:10:06,496 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 01:10:06,496 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_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d3267df59902b667587c98ecbe021c99cc3d2a5e5866fbd08ee1fb3133370aa4 [2023-11-29 01:10:06,717 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 01:10:06,737 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 01:10:06,740 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 01:10:06,741 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 01:10:06,741 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 01:10:06,742 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/array-crafted/zero_sum3.c [2023-11-29 01:10:09,534 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 01:10:09,736 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 01:10:09,737 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/sv-benchmarks/c/array-crafted/zero_sum3.c [2023-11-29 01:10:09,744 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/data/a20b1cb52/164ca68b2924474f804bce4b3e4e02de/FLAG237a2fc2f [2023-11-29 01:10:09,759 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/data/a20b1cb52/164ca68b2924474f804bce4b3e4e02de [2023-11-29 01:10:09,761 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 01:10:09,763 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 01:10:09,764 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 01:10:09,765 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 01:10:09,769 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 01:10:09,770 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 01:10:09" (1/1) ... [2023-11-29 01:10:09,771 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@289dccf2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:10:09, skipping insertion in model container [2023-11-29 01:10:09,771 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 01:10:09" (1/1) ... [2023-11-29 01:10:09,789 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 01:10:09,910 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_337a2c0d-6d18-4819-bac1-35cc4edab912/sv-benchmarks/c/array-crafted/zero_sum3.c[400,413] [2023-11-29 01:10:09,929 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 01:10:09,937 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 01:10:09,946 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_337a2c0d-6d18-4819-bac1-35cc4edab912/sv-benchmarks/c/array-crafted/zero_sum3.c[400,413] [2023-11-29 01:10:09,955 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 01:10:09,969 INFO L206 MainTranslator]: Completed translation [2023-11-29 01:10:09,970 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:10:09 WrapperNode [2023-11-29 01:10:09,970 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 01:10:09,971 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 01:10:09,971 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 01:10:09,971 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 01:10:09,976 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:10:09" (1/1) ... [2023-11-29 01:10:09,982 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:10:09" (1/1) ... [2023-11-29 01:10:10,005 INFO L138 Inliner]: procedures = 15, calls = 17, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 108 [2023-11-29 01:10:10,005 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 01:10:10,005 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 01:10:10,006 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 01:10:10,006 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 01:10:10,014 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:10:09" (1/1) ... [2023-11-29 01:10:10,014 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:10:09" (1/1) ... [2023-11-29 01:10:10,016 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:10:09" (1/1) ... [2023-11-29 01:10:10,028 INFO L175 MemorySlicer]: Split 9 memory accesses to 2 slices as follows [2, 7]. 78 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2023-11-29 01:10:10,029 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:10:09" (1/1) ... [2023-11-29 01:10:10,029 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:10:09" (1/1) ... [2023-11-29 01:10:10,035 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:10:09" (1/1) ... [2023-11-29 01:10:10,039 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:10:09" (1/1) ... [2023-11-29 01:10:10,041 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:10:09" (1/1) ... [2023-11-29 01:10:10,042 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:10:09" (1/1) ... [2023-11-29 01:10:10,044 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 01:10:10,045 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 01:10:10,046 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 01:10:10,046 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 01:10:10,046 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:10:09" (1/1) ... [2023-11-29 01:10:10,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 01:10:10,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:10:10,072 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 01:10:10,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 01:10:10,108 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 01:10:10,108 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 01:10:10,108 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 01:10:10,108 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 01:10:10,108 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 01:10:10,108 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 01:10:10,109 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 01:10:10,109 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 01:10:10,109 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 01:10:10,109 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 01:10:10,109 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 01:10:10,177 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 01:10:10,180 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 01:10:10,335 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 01:10:10,370 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 01:10:10,370 INFO L309 CfgBuilder]: Removed 7 assume(true) statements. [2023-11-29 01:10:10,371 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 01:10:10 BoogieIcfgContainer [2023-11-29 01:10:10,371 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 01:10:10,374 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 01:10:10,374 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 01:10:10,377 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 01:10:10,378 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 01:10:09" (1/3) ... [2023-11-29 01:10:10,378 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ffc5551 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 01:10:10, skipping insertion in model container [2023-11-29 01:10:10,379 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:10:09" (2/3) ... [2023-11-29 01:10:10,379 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ffc5551 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 01:10:10, skipping insertion in model container [2023-11-29 01:10:10,379 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 01:10:10" (3/3) ... [2023-11-29 01:10:10,381 INFO L112 eAbstractionObserver]: Analyzing ICFG zero_sum3.c [2023-11-29 01:10:10,397 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 01:10:10,397 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 01:10:10,437 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 01:10:10,444 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;@29b3f6c8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 01:10:10,444 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 01:10:10,448 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 20 states have (on average 1.85) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:10:10,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-29 01:10:10,453 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:10:10,454 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:10:10,454 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:10:10,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:10:10,459 INFO L85 PathProgramCache]: Analyzing trace with hash -978184044, now seen corresponding path program 1 times [2023-11-29 01:10:10,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:10:10,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690583878] [2023-11-29 01:10:10,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:10:10,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:10:10,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:10:10,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:10:10,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:10:10,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690583878] [2023-11-29 01:10:10,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690583878] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:10:10,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:10:10,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 01:10:10,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830936560] [2023-11-29 01:10:10,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:10:10,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 01:10:10,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:10:10,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 01:10:10,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 01:10:10,641 INFO L87 Difference]: Start difference. First operand has 22 states, 20 states have (on average 1.85) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:10:10,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:10:10,677 INFO L93 Difference]: Finished difference Result 41 states and 68 transitions. [2023-11-29 01:10:10,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 01:10:10,679 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-11-29 01:10:10,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:10:10,687 INFO L225 Difference]: With dead ends: 41 [2023-11-29 01:10:10,687 INFO L226 Difference]: Without dead ends: 19 [2023-11-29 01:10:10,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 01:10:10,693 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:10:10,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 01:10:10,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-11-29 01:10:10,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-11-29 01:10:10,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:10:10,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2023-11-29 01:10:10,727 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 25 transitions. Word has length 18 [2023-11-29 01:10:10,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:10:10,727 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 25 transitions. [2023-11-29 01:10:10,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:10:10,728 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2023-11-29 01:10:10,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-29 01:10:10,728 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:10:10,728 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:10:10,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 01:10:10,729 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:10:10,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:10:10,730 INFO L85 PathProgramCache]: Analyzing trace with hash 2084842272, now seen corresponding path program 1 times [2023-11-29 01:10:10,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:10:10,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761606732] [2023-11-29 01:10:10,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:10:10,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:10:10,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:10:10,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:10:10,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:10:10,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761606732] [2023-11-29 01:10:10,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761606732] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:10:10,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:10:10,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 01:10:10,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217244259] [2023-11-29 01:10:10,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:10:10,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:10:10,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:10:10,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:10:10,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:10:10,850 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:10:10,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:10:10,888 INFO L93 Difference]: Finished difference Result 36 states and 48 transitions. [2023-11-29 01:10:10,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:10:10,889 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-11-29 01:10:10,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:10:10,890 INFO L225 Difference]: With dead ends: 36 [2023-11-29 01:10:10,890 INFO L226 Difference]: Without dead ends: 20 [2023-11-29 01:10:10,890 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 [2023-11-29 01:10:10,892 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:10:10,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 01:10:10,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-11-29 01:10:10,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-11-29 01:10:10,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:10:10,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2023-11-29 01:10:10,898 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 26 transitions. Word has length 18 [2023-11-29 01:10:10,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:10:10,899 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 26 transitions. [2023-11-29 01:10:10,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:10:10,899 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 26 transitions. [2023-11-29 01:10:10,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-29 01:10:10,900 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:10:10,900 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:10:10,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 01:10:10,900 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:10:10,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:10:10,901 INFO L85 PathProgramCache]: Analyzing trace with hash 429836754, now seen corresponding path program 1 times [2023-11-29 01:10:10,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:10:10,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908385572] [2023-11-29 01:10:10,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:10:10,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:10:10,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:10:11,010 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 01:10:11,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:10:11,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908385572] [2023-11-29 01:10:11,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908385572] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:10:11,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:10:11,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 01:10:11,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995101144] [2023-11-29 01:10:11,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:10:11,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 01:10:11,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:10:11,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 01:10:11,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 01:10:11,014 INFO L87 Difference]: Start difference. First operand 20 states and 26 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:10:11,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:10:11,106 INFO L93 Difference]: Finished difference Result 40 states and 56 transitions. [2023-11-29 01:10:11,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 01:10:11,107 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 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 19 [2023-11-29 01:10:11,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:10:11,108 INFO L225 Difference]: With dead ends: 40 [2023-11-29 01:10:11,108 INFO L226 Difference]: Without dead ends: 26 [2023-11-29 01:10:11,108 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 01:10:11,110 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 26 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:10:11,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 13 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:10:11,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-29 01:10:11,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-11-29 01:10:11,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:10:11,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2023-11-29 01:10:11,117 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 19 [2023-11-29 01:10:11,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:10:11,118 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2023-11-29 01:10:11,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:10:11,118 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2023-11-29 01:10:11,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-29 01:10:11,119 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:10:11,119 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] [2023-11-29 01:10:11,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 01:10:11,120 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:10:11,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:10:11,120 INFO L85 PathProgramCache]: Analyzing trace with hash 185456906, now seen corresponding path program 1 times [2023-11-29 01:10:11,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:10:11,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935548159] [2023-11-29 01:10:11,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:10:11,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:10:11,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:10:11,240 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 01:10:11,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:10:11,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935548159] [2023-11-29 01:10:11,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935548159] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:10:11,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881863726] [2023-11-29 01:10:11,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:10:11,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:10:11,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:10:11,245 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:10:11,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 01:10:11,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:10:11,325 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 01:10:11,330 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:10:11,387 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 01:10:11,387 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:10:11,415 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 01:10:11,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881863726] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:10:11,415 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:10:11,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-29 01:10:11,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928899407] [2023-11-29 01:10:11,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:10:11,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 01:10:11,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:10:11,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 01:10:11,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2023-11-29 01:10:11,418 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:10:11,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:10:11,454 INFO L93 Difference]: Finished difference Result 49 states and 61 transitions. [2023-11-29 01:10:11,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 01:10:11,455 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 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 [2023-11-29 01:10:11,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:10:11,456 INFO L225 Difference]: With dead ends: 49 [2023-11-29 01:10:11,456 INFO L226 Difference]: Without dead ends: 27 [2023-11-29 01:10:11,456 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2023-11-29 01:10:11,458 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:10:11,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 01:10:11,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-11-29 01:10:11,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-11-29 01:10:11,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:10:11,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2023-11-29 01:10:11,465 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 25 [2023-11-29 01:10:11,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:10:11,465 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2023-11-29 01:10:11,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:10:11,465 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2023-11-29 01:10:11,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-29 01:10:11,466 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:10:11,466 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-29 01:10:11,474 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 01:10:11,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:10:11,670 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:10:11,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:10:11,670 INFO L85 PathProgramCache]: Analyzing trace with hash -927551976, now seen corresponding path program 2 times [2023-11-29 01:10:11,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:10:11,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304026262] [2023-11-29 01:10:11,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:10:11,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:10:11,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:10:11,770 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-29 01:10:11,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:10:11,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304026262] [2023-11-29 01:10:11,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304026262] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:10:11,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977144503] [2023-11-29 01:10:11,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 01:10:11,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:10:11,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:10:11,776 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:10:11,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 01:10:11,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 01:10:11,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:10:11,848 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 01:10:11,850 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:10:11,909 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-29 01:10:11,909 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:10:11,955 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-29 01:10:11,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977144503] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:10:11,956 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:10:11,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-11-29 01:10:11,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328476146] [2023-11-29 01:10:11,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:10:11,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 01:10:11,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:10:11,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 01:10:11,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-11-29 01:10:11,958 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:10:12,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:10:12,035 INFO L93 Difference]: Finished difference Result 52 states and 68 transitions. [2023-11-29 01:10:12,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 01:10:12,036 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-11-29 01:10:12,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:10:12,037 INFO L225 Difference]: With dead ends: 52 [2023-11-29 01:10:12,037 INFO L226 Difference]: Without dead ends: 33 [2023-11-29 01:10:12,037 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-11-29 01:10:12,038 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 9 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:10:12,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 19 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:10:12,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-11-29 01:10:12,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2023-11-29 01:10:12,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.21875) internal successors, (39), 32 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:10:12,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2023-11-29 01:10:12,046 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 26 [2023-11-29 01:10:12,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:10:12,047 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2023-11-29 01:10:12,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:10:12,047 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2023-11-29 01:10:12,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-29 01:10:12,048 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:10:12,048 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-29 01:10:12,053 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 01:10:12,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:10:12,253 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:10:12,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:10:12,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1100979040, now seen corresponding path program 3 times [2023-11-29 01:10:12,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:10:12,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978515958] [2023-11-29 01:10:12,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:10:12,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:10:12,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:10:14,119 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:10:14,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:10:14,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978515958] [2023-11-29 01:10:14,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978515958] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:10:14,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207005666] [2023-11-29 01:10:14,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 01:10:14,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:10:14,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:10:14,122 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:10:14,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 01:10:14,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 01:10:14,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:10:14,200 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 64 conjunts are in the unsatisfiable core [2023-11-29 01:10:14,203 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:10:14,247 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 [2023-11-29 01:10:14,430 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:10:14,430 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:10:14,652 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 01:10:14,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207005666] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:10:14,653 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:10:14,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 9] total 18 [2023-11-29 01:10:14,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893288034] [2023-11-29 01:10:14,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:10:14,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 01:10:14,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:10:14,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 01:10:14,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2023-11-29 01:10:14,656 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 18 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:10:14,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:10:14,968 INFO L93 Difference]: Finished difference Result 58 states and 69 transitions. [2023-11-29 01:10:14,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 01:10:14,968 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 18 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2023-11-29 01:10:14,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:10:14,969 INFO L225 Difference]: With dead ends: 58 [2023-11-29 01:10:14,970 INFO L226 Difference]: Without dead ends: 54 [2023-11-29 01:10:14,970 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2023-11-29 01:10:14,971 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 3 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 01:10:14,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 115 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 01:10:14,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-11-29 01:10:14,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2023-11-29 01:10:14,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.2352941176470589) internal successors, (63), 51 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:10:14,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 63 transitions. [2023-11-29 01:10:14,983 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 63 transitions. Word has length 32 [2023-11-29 01:10:14,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:10:14,984 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 63 transitions. [2023-11-29 01:10:14,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 18 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:10:14,984 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 63 transitions. [2023-11-29 01:10:14,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-29 01:10:14,986 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:10:14,986 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:10:14,991 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 01:10:15,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-29 01:10:15,190 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:10:15,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:10:15,190 INFO L85 PathProgramCache]: Analyzing trace with hash -891767627, now seen corresponding path program 4 times [2023-11-29 01:10:15,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:10:15,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643348911] [2023-11-29 01:10:15,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:10:15,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:10:15,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:10:15,329 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-29 01:10:15,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:10:15,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643348911] [2023-11-29 01:10:15,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643348911] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:10:15,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199228888] [2023-11-29 01:10:15,330 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 01:10:15,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:10:15,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:10:15,331 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:10:15,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 01:10:15,396 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 01:10:15,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:10:15,398 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 01:10:15,399 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:10:15,483 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-29 01:10:15,484 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:10:15,551 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-29 01:10:15,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199228888] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:10:15,552 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:10:15,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-11-29 01:10:15,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913899483] [2023-11-29 01:10:15,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:10:15,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 01:10:15,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:10:15,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 01:10:15,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2023-11-29 01:10:15,555 INFO L87 Difference]: Start difference. First operand 52 states and 63 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:10:15,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:10:15,833 INFO L93 Difference]: Finished difference Result 117 states and 142 transitions. [2023-11-29 01:10:15,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 01:10:15,833 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2023-11-29 01:10:15,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:10:15,834 INFO L225 Difference]: With dead ends: 117 [2023-11-29 01:10:15,834 INFO L226 Difference]: Without dead ends: 67 [2023-11-29 01:10:15,835 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 54 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2023-11-29 01:10:15,836 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 85 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:10:15,836 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 42 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 01:10:15,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-11-29 01:10:15,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 55. [2023-11-29 01:10:15,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.2037037037037037) internal successors, (65), 54 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:10:15,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2023-11-29 01:10:15,846 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 33 [2023-11-29 01:10:15,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:10:15,846 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2023-11-29 01:10:15,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:10:15,847 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2023-11-29 01:10:15,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-29 01:10:15,847 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:10:15,847 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:10:15,852 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 01:10:16,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-29 01:10:16,050 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:10:16,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:10:16,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1276218571, now seen corresponding path program 5 times [2023-11-29 01:10:16,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:10:16,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889558090] [2023-11-29 01:10:16,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:10:16,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:10:16,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:10:16,177 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-29 01:10:16,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:10:16,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889558090] [2023-11-29 01:10:16,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889558090] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:10:16,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103782577] [2023-11-29 01:10:16,179 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 01:10:16,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:10:16,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:10:16,180 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:10:16,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 01:10:16,276 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-29 01:10:16,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:10:16,277 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 01:10:16,279 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:10:16,347 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-29 01:10:16,348 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:10:16,414 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-29 01:10:16,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103782577] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:10:16,414 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:10:16,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-11-29 01:10:16,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875099648] [2023-11-29 01:10:16,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:10:16,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 01:10:16,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:10:16,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 01:10:16,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2023-11-29 01:10:16,417 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:10:16,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:10:16,517 INFO L93 Difference]: Finished difference Result 60 states and 70 transitions. [2023-11-29 01:10:16,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 01:10:16,518 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2023-11-29 01:10:16,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:10:16,519 INFO L225 Difference]: With dead ends: 60 [2023-11-29 01:10:16,519 INFO L226 Difference]: Without dead ends: 40 [2023-11-29 01:10:16,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 57 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-11-29 01:10:16,520 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 24 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:10:16,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 32 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:10:16,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-11-29 01:10:16,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2023-11-29 01:10:16,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 39 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:10:16,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2023-11-29 01:10:16,528 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 34 [2023-11-29 01:10:16,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:10:16,528 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2023-11-29 01:10:16,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:10:16,529 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2023-11-29 01:10:16,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-29 01:10:16,529 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:10:16,530 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:10:16,535 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 01:10:16,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:10:16,734 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:10:16,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:10:16,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1120646518, now seen corresponding path program 6 times [2023-11-29 01:10:16,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:10:16,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729636548] [2023-11-29 01:10:16,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:10:16,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:10:16,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:10:19,896 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:10:19,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:10:19,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729636548] [2023-11-29 01:10:19,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729636548] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:10:19,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922462391] [2023-11-29 01:10:19,897 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 01:10:19,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:10:19,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:10:19,898 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:10:19,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 01:10:19,988 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-29 01:10:19,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:10:19,991 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 82 conjunts are in the unsatisfiable core [2023-11-29 01:10:19,995 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:10:20,287 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 01:10:20,287 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:10:20,715 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:10:20,716 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 52 treesize of output 89 [2023-11-29 01:10:20,920 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 01:10:20,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922462391] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:10:20,921 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:10:20,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 12, 12] total 41 [2023-11-29 01:10:20,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890659651] [2023-11-29 01:10:20,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:10:20,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-11-29 01:10:20,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:10:20,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-11-29 01:10:20,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1510, Unknown=0, NotChecked=0, Total=1640 [2023-11-29 01:10:20,924 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand has 41 states, 41 states have (on average 2.3658536585365852) internal successors, (97), 41 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:10:22,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:10:22,765 INFO L93 Difference]: Finished difference Result 117 states and 138 transitions. [2023-11-29 01:10:22,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-29 01:10:22,766 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.3658536585365852) internal successors, (97), 41 states have internal predecessors, (97), 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 39 [2023-11-29 01:10:22,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:10:22,769 INFO L225 Difference]: With dead ends: 117 [2023-11-29 01:10:22,769 INFO L226 Difference]: Without dead ends: 113 [2023-11-29 01:10:22,771 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 963 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=401, Invalid=3889, Unknown=0, NotChecked=0, Total=4290 [2023-11-29 01:10:22,772 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 46 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 1019 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 1165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 1019 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 01:10:22,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 154 Invalid, 1165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 1019 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 01:10:22,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2023-11-29 01:10:22,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 81. [2023-11-29 01:10:22,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.225) internal successors, (98), 80 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:10:22,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 98 transitions. [2023-11-29 01:10:22,794 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 98 transitions. Word has length 39 [2023-11-29 01:10:22,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:10:22,794 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 98 transitions. [2023-11-29 01:10:22,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.3658536585365852) internal successors, (97), 41 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:10:22,795 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 98 transitions. [2023-11-29 01:10:22,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-29 01:10:22,796 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:10:22,796 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:10:22,802 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 01:10:23,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:10:23,002 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:10:23,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:10:23,002 INFO L85 PathProgramCache]: Analyzing trace with hash 536518859, now seen corresponding path program 7 times [2023-11-29 01:10:23,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:10:23,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515088415] [2023-11-29 01:10:23,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:10:23,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:10:23,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:10:23,139 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 01:10:23,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:10:23,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515088415] [2023-11-29 01:10:23,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515088415] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:10:23,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907255200] [2023-11-29 01:10:23,140 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 01:10:23,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:10:23,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:10:23,142 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:10:23,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 01:10:23,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:10:23,226 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 01:10:23,228 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:10:23,314 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 01:10:23,314 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:10:23,378 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 01:10:23,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907255200] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:10:23,379 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:10:23,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2023-11-29 01:10:23,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461169307] [2023-11-29 01:10:23,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:10:23,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-29 01:10:23,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:10:23,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-29 01:10:23,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2023-11-29 01:10:23,381 INFO L87 Difference]: Start difference. First operand 81 states and 98 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:10:23,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:10:23,577 INFO L93 Difference]: Finished difference Result 153 states and 182 transitions. [2023-11-29 01:10:23,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 01:10:23,578 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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 40 [2023-11-29 01:10:23,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:10:23,578 INFO L225 Difference]: With dead ends: 153 [2023-11-29 01:10:23,578 INFO L226 Difference]: Without dead ends: 75 [2023-11-29 01:10:23,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 67 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2023-11-29 01:10:23,580 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 19 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:10:23,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 65 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 01:10:23,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-11-29 01:10:23,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2023-11-29 01:10:23,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.2027027027027026) internal successors, (89), 74 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:10:23,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 89 transitions. [2023-11-29 01:10:23,612 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 89 transitions. Word has length 40 [2023-11-29 01:10:23,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:10:23,612 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 89 transitions. [2023-11-29 01:10:23,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:10:23,613 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 89 transitions. [2023-11-29 01:10:23,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-29 01:10:23,614 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:10:23,614 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:10:23,620 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 01:10:23,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 01:10:23,820 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:10:23,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:10:23,820 INFO L85 PathProgramCache]: Analyzing trace with hash 283594237, now seen corresponding path program 8 times [2023-11-29 01:10:23,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:10:23,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220583795] [2023-11-29 01:10:23,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:10:23,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:10:23,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:10:23,944 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-11-29 01:10:23,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:10:23,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220583795] [2023-11-29 01:10:23,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220583795] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:10:23,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679811945] [2023-11-29 01:10:23,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 01:10:23,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:10:23,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:10:23,946 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:10:23,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 01:10:24,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 01:10:24,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:10:24,029 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 01:10:24,031 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:10:24,140 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-11-29 01:10:24,140 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:10:24,240 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-11-29 01:10:24,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679811945] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:10:24,241 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:10:24,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2023-11-29 01:10:24,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117617017] [2023-11-29 01:10:24,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:10:24,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-29 01:10:24,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:10:24,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-29 01:10:24,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2023-11-29 01:10:24,243 INFO L87 Difference]: Start difference. First operand 75 states and 89 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:10:24,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:10:24,361 INFO L93 Difference]: Finished difference Result 105 states and 128 transitions. [2023-11-29 01:10:24,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 01:10:24,362 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2023-11-29 01:10:24,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:10:24,362 INFO L225 Difference]: With dead ends: 105 [2023-11-29 01:10:24,362 INFO L226 Difference]: Without dead ends: 53 [2023-11-29 01:10:24,363 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 68 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2023-11-29 01:10:24,363 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 7 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:10:24,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 56 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:10:24,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-11-29 01:10:24,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 47. [2023-11-29 01:10:24,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 46 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:10:24,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2023-11-29 01:10:24,371 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 41 [2023-11-29 01:10:24,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:10:24,371 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2023-11-29 01:10:24,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:10:24,372 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2023-11-29 01:10:24,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-29 01:10:24,372 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:10:24,373 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:10:24,378 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 01:10:24,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-29 01:10:24,578 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:10:24,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:10:24,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1329532448, now seen corresponding path program 9 times [2023-11-29 01:10:24,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:10:24,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451078905] [2023-11-29 01:10:24,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:10:24,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:10:24,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:10:28,051 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:10:28,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:10:28,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451078905] [2023-11-29 01:10:28,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451078905] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:10:28,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429893334] [2023-11-29 01:10:28,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 01:10:28,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:10:28,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:10:28,053 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:10:28,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 01:10:28,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 01:10:28,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:10:28,149 WARN L260 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 116 conjunts are in the unsatisfiable core [2023-11-29 01:10:28,152 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:10:29,663 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:10:29,663 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 16 [2023-11-29 01:10:29,768 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 4 proven. 60 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 01:10:29,769 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:10:51,474 INFO L349 Elim1Store]: treesize reduction 84, result has 56.9 percent of original size [2023-11-29 01:10:51,474 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 71 treesize of output 123 [2023-11-29 01:10:52,042 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 01:10:52,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429893334] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:10:52,042 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:10:52,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 25, 30] total 84 [2023-11-29 01:10:52,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303678141] [2023-11-29 01:10:52,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:10:52,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2023-11-29 01:10:52,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:10:52,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2023-11-29 01:10:52,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=525, Invalid=6440, Unknown=7, NotChecked=0, Total=6972 [2023-11-29 01:10:52,047 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand has 84 states, 84 states have (on average 1.5119047619047619) internal successors, (127), 84 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:10:55,235 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-29 01:11:01,535 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-29 01:11:09,019 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-29 01:11:12,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:11:12,048 INFO L93 Difference]: Finished difference Result 182 states and 212 transitions. [2023-11-29 01:11:12,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-11-29 01:11:12,049 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 1.5119047619047619) internal successors, (127), 84 states have internal predecessors, (127), 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 46 [2023-11-29 01:11:12,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:11:12,050 INFO L225 Difference]: With dead ends: 182 [2023-11-29 01:11:12,050 INFO L226 Difference]: Without dead ends: 172 [2023-11-29 01:11:12,055 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 5039 ImplicationChecksByTransitivity, 31.1s TimeCoverageRelationStatistics Valid=1908, Invalid=18965, Unknown=7, NotChecked=0, Total=20880 [2023-11-29 01:11:12,056 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 134 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 4164 mSolverCounterSat, 484 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 4654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 484 IncrementalHoareTripleChecker+Valid, 4164 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:11:12,056 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 509 Invalid, 4654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [484 Valid, 4164 Invalid, 6 Unknown, 0 Unchecked, 12.2s Time] [2023-11-29 01:11:12,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2023-11-29 01:11:12,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 87. [2023-11-29 01:11:12,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.1744186046511629) internal successors, (101), 86 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:11:12,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 101 transitions. [2023-11-29 01:11:12,085 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 101 transitions. Word has length 46 [2023-11-29 01:11:12,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:11:12,086 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 101 transitions. [2023-11-29 01:11:12,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 1.5119047619047619) internal successors, (127), 84 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:11:12,086 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 101 transitions. [2023-11-29 01:11:12,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-29 01:11:12,087 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:11:12,087 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:11:12,094 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 01:11:12,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-29 01:11:12,294 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:11:12,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:11:12,294 INFO L85 PathProgramCache]: Analyzing trace with hash -165085131, now seen corresponding path program 10 times [2023-11-29 01:11:12,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:11:12,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36409690] [2023-11-29 01:11:12,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:11:12,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:11:12,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:11:12,478 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-11-29 01:11:12,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:11:12,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36409690] [2023-11-29 01:11:12,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36409690] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:11:12,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46516918] [2023-11-29 01:11:12,478 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 01:11:12,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:11:12,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:11:12,479 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:11:12,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 01:11:12,563 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 01:11:12,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:11:12,565 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 01:11:12,569 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:11:12,808 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-11-29 01:11:12,808 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:11:12,922 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-11-29 01:11:12,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46516918] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:11:12,922 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:11:12,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 24 [2023-11-29 01:11:12,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344408643] [2023-11-29 01:11:12,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:11:12,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-29 01:11:12,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:11:12,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-29 01:11:12,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2023-11-29 01:11:12,924 INFO L87 Difference]: Start difference. First operand 87 states and 101 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:11:13,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:11:13,303 INFO L93 Difference]: Finished difference Result 231 states and 271 transitions. [2023-11-29 01:11:13,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-29 01:11:13,304 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2023-11-29 01:11:13,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:11:13,305 INFO L225 Difference]: With dead ends: 231 [2023-11-29 01:11:13,305 INFO L226 Difference]: Without dead ends: 110 [2023-11-29 01:11:13,306 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 74 SyntacticMatches, 9 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=177, Invalid=693, Unknown=0, NotChecked=0, Total=870 [2023-11-29 01:11:13,307 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 94 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 265 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 265 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:11:13,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 55 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [265 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 01:11:13,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2023-11-29 01:11:13,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 95. [2023-11-29 01:11:13,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.148936170212766) internal successors, (108), 94 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:11:13,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 108 transitions. [2023-11-29 01:11:13,344 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 108 transitions. Word has length 47 [2023-11-29 01:11:13,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:11:13,344 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 108 transitions. [2023-11-29 01:11:13,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:11:13,345 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 108 transitions. [2023-11-29 01:11:13,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-29 01:11:13,345 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:11:13,345 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:11:13,350 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 01:11:13,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-29 01:11:13,547 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:11:13,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:11:13,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1665220181, now seen corresponding path program 11 times [2023-11-29 01:11:13,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:11:13,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22097948] [2023-11-29 01:11:13,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:11:13,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:11:13,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:11:13,790 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-11-29 01:11:13,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:11:13,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22097948] [2023-11-29 01:11:13,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22097948] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:11:13,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408627954] [2023-11-29 01:11:13,791 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 01:11:13,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:11:13,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:11:13,792 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:11:13,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 01:11:14,047 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-29 01:11:14,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:11:14,050 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 01:11:14,051 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:11:14,201 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-11-29 01:11:14,202 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:11:14,322 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-11-29 01:11:14,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408627954] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:11:14,322 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:11:14,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 24 [2023-11-29 01:11:14,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471002493] [2023-11-29 01:11:14,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:11:14,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-29 01:11:14,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:11:14,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-29 01:11:14,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2023-11-29 01:11:14,324 INFO L87 Difference]: Start difference. First operand 95 states and 108 transitions. Second operand has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:11:14,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:11:14,607 INFO L93 Difference]: Finished difference Result 104 states and 117 transitions. [2023-11-29 01:11:14,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 01:11:14,608 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 24 states have internal predecessors, (59), 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 50 [2023-11-29 01:11:14,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:11:14,608 INFO L225 Difference]: With dead ends: 104 [2023-11-29 01:11:14,609 INFO L226 Difference]: Without dead ends: 82 [2023-11-29 01:11:14,609 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 84 SyntacticMatches, 10 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=175, Invalid=695, Unknown=0, NotChecked=0, Total=870 [2023-11-29 01:11:14,609 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 41 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:11:14,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 37 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 01:11:14,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-11-29 01:11:14,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 54. [2023-11-29 01:11:14,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.1320754716981132) internal successors, (60), 53 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:11:14,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2023-11-29 01:11:14,632 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 50 [2023-11-29 01:11:14,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:11:14,633 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2023-11-29 01:11:14,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:11:14,633 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2023-11-29 01:11:14,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-29 01:11:14,633 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:11:14,633 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:11:14,638 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 01:11:14,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 01:11:14,834 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:11:14,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:11:14,835 INFO L85 PathProgramCache]: Analyzing trace with hash 179850250, now seen corresponding path program 12 times [2023-11-29 01:11:14,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:11:14,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314131517] [2023-11-29 01:11:14,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:11:14,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:11:14,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:11:19,157 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 3 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:11:19,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:11:19,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314131517] [2023-11-29 01:11:19,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314131517] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:11:19,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260558644] [2023-11-29 01:11:19,158 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 01:11:19,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:11:19,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:11:19,159 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:11:19,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 01:11:19,273 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-29 01:11:19,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:11:19,277 WARN L260 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 149 conjunts are in the unsatisfiable core [2023-11-29 01:11:19,281 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:11:21,137 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:11:21,137 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2023-11-29 01:11:21,250 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:11:21,250 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:11:24,627 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:11:24,628 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 75 treesize of output 199 [2023-11-29 01:11:27,823 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:11:27,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260558644] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:11:27,824 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:11:27,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 29, 44] total 105 [2023-11-29 01:11:27,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207284906] [2023-11-29 01:11:27,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:11:27,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2023-11-29 01:11:27,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:11:27,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2023-11-29 01:11:27,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=10320, Unknown=0, NotChecked=0, Total=10920 [2023-11-29 01:11:27,830 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand has 105 states, 105 states have (on average 1.4190476190476191) internal successors, (149), 105 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:11:39,403 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:11:43,438 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 01:11:45,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:11:45,186 INFO L93 Difference]: Finished difference Result 243 states and 278 transitions. [2023-11-29 01:11:45,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2023-11-29 01:11:45,186 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 1.4190476190476191) internal successors, (149), 105 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2023-11-29 01:11:45,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:11:45,187 INFO L225 Difference]: With dead ends: 243 [2023-11-29 01:11:45,187 INFO L226 Difference]: Without dead ends: 138 [2023-11-29 01:11:45,191 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7231 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=2018, Invalid=24713, Unknown=1, NotChecked=0, Total=26732 [2023-11-29 01:11:45,192 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 242 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 6645 mSolverCounterSat, 745 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 7392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 745 IncrementalHoareTripleChecker+Valid, 6645 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.5s IncrementalHoareTripleChecker+Time [2023-11-29 01:11:45,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [242 Valid, 508 Invalid, 7392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [745 Valid, 6645 Invalid, 2 Unknown, 0 Unchecked, 8.5s Time] [2023-11-29 01:11:45,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2023-11-29 01:11:45,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 79. [2023-11-29 01:11:45,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.141025641025641) internal successors, (89), 78 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:11:45,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 89 transitions. [2023-11-29 01:11:45,242 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 89 transitions. Word has length 53 [2023-11-29 01:11:45,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:11:45,242 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 89 transitions. [2023-11-29 01:11:45,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 1.4190476190476191) internal successors, (149), 105 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:11:45,243 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 89 transitions. [2023-11-29 01:11:45,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-29 01:11:45,243 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:11:45,243 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:11:45,247 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 01:11:45,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 01:11:45,444 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:11:45,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:11:45,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1831185661, now seen corresponding path program 13 times [2023-11-29 01:11:45,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:11:45,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426529385] [2023-11-29 01:11:45,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:11:45,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:11:45,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:11:45,617 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-11-29 01:11:45,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:11:45,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426529385] [2023-11-29 01:11:45,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426529385] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:11:45,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436809311] [2023-11-29 01:11:45,618 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 01:11:45,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:11:45,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:11:45,619 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:11:45,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 01:11:45,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:11:45,708 INFO L262 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 01:11:45,710 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:11:45,814 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-11-29 01:11:45,814 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:11:45,903 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-11-29 01:11:45,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436809311] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:11:45,903 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:11:45,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2023-11-29 01:11:45,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16198973] [2023-11-29 01:11:45,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:11:45,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 01:11:45,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:11:45,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 01:11:45,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2023-11-29 01:11:45,905 INFO L87 Difference]: Start difference. First operand 79 states and 89 transitions. Second operand has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:11:46,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:11:46,075 INFO L93 Difference]: Finished difference Result 124 states and 144 transitions. [2023-11-29 01:11:46,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 01:11:46,076 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2023-11-29 01:11:46,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:11:46,076 INFO L225 Difference]: With dead ends: 124 [2023-11-29 01:11:46,076 INFO L226 Difference]: Without dead ends: 61 [2023-11-29 01:11:46,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 90 SyntacticMatches, 12 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=414, Unknown=0, NotChecked=0, Total=552 [2023-11-29 01:11:46,077 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 54 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:11:46,077 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 51 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:11:46,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-11-29 01:11:46,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2023-11-29 01:11:46,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.1166666666666667) internal successors, (67), 60 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) [2023-11-29 01:11:46,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 67 transitions. [2023-11-29 01:11:46,109 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 67 transitions. Word has length 55 [2023-11-29 01:11:46,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:11:46,109 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 67 transitions. [2023-11-29 01:11:46,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:11:46,110 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 67 transitions. [2023-11-29 01:11:46,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-11-29 01:11:46,110 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:11:46,110 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:11:46,115 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 01:11:46,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 01:11:46,311 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:11:46,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:11:46,311 INFO L85 PathProgramCache]: Analyzing trace with hash 997205920, now seen corresponding path program 14 times [2023-11-29 01:11:46,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:11:46,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332081483] [2023-11-29 01:11:46,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:11:46,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:11:46,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:11:52,125 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 6 proven. 141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:11:52,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:11:52,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332081483] [2023-11-29 01:11:52,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332081483] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:11:52,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140746667] [2023-11-29 01:11:52,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 01:11:52,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:11:52,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:11:52,126 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:11:52,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 01:11:52,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 01:11:52,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:11:52,230 WARN L260 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 168 conjunts are in the unsatisfiable core [2023-11-29 01:11:52,233 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:11:52,319 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 [2023-11-29 01:11:53,081 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:11:53,081 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:11:54,415 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-29 01:11:54,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140746667] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:11:54,415 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:11:54,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 24, 17] total 72 [2023-11-29 01:11:54,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88562864] [2023-11-29 01:11:54,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:11:54,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2023-11-29 01:11:54,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:11:54,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2023-11-29 01:11:54,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=4844, Unknown=0, NotChecked=0, Total=5112 [2023-11-29 01:11:54,418 INFO L87 Difference]: Start difference. First operand 61 states and 67 transitions. Second operand has 72 states, 72 states have (on average 2.111111111111111) internal successors, (152), 72 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) [2023-11-29 01:11:58,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:11:58,031 INFO L93 Difference]: Finished difference Result 160 states and 179 transitions. [2023-11-29 01:11:58,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-11-29 01:11:58,032 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.111111111111111) internal successors, (152), 72 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) Word has length 60 [2023-11-29 01:11:58,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:11:58,033 INFO L225 Difference]: With dead ends: 160 [2023-11-29 01:11:58,033 INFO L226 Difference]: Without dead ends: 156 [2023-11-29 01:11:58,034 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2331 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=642, Invalid=8864, Unknown=0, NotChecked=0, Total=9506 [2023-11-29 01:11:58,034 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 63 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 2583 mSolverCounterSat, 270 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 2853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 270 IncrementalHoareTripleChecker+Valid, 2583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-11-29 01:11:58,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 326 Invalid, 2853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [270 Valid, 2583 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-11-29 01:11:58,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2023-11-29 01:11:58,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 88. [2023-11-29 01:11:58,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.1264367816091954) internal successors, (98), 87 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:11:58,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 98 transitions. [2023-11-29 01:11:58,087 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 98 transitions. Word has length 60 [2023-11-29 01:11:58,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:11:58,087 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 98 transitions. [2023-11-29 01:11:58,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.111111111111111) internal successors, (152), 72 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) [2023-11-29 01:11:58,088 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 98 transitions. [2023-11-29 01:11:58,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-11-29 01:11:58,088 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:11:58,088 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:11:58,093 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 01:11:58,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 01:11:58,289 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:11:58,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:11:58,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1285364661, now seen corresponding path program 15 times [2023-11-29 01:11:58,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:11:58,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737797302] [2023-11-29 01:11:58,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:11:58,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:11:58,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:11:58,499 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2023-11-29 01:11:58,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:11:58,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737797302] [2023-11-29 01:11:58,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737797302] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:11:58,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693547965] [2023-11-29 01:11:58,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 01:11:58,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:11:58,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:11:58,500 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:11:58,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 01:11:58,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-11-29 01:11:58,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:11:58,625 INFO L262 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-29 01:11:58,627 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:11:58,771 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2023-11-29 01:11:58,771 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:11:58,865 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2023-11-29 01:11:58,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693547965] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:11:58,865 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:11:58,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2023-11-29 01:11:58,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136992365] [2023-11-29 01:11:58,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:11:58,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-29 01:11:58,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:11:58,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-29 01:11:58,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=493, Unknown=0, NotChecked=0, Total=650 [2023-11-29 01:11:58,867 INFO L87 Difference]: Start difference. First operand 88 states and 98 transitions. Second operand has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 26 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:11:59,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:11:59,154 INFO L93 Difference]: Finished difference Result 209 states and 234 transitions. [2023-11-29 01:11:59,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 01:11:59,154 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 26 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2023-11-29 01:11:59,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:11:59,155 INFO L225 Difference]: With dead ends: 209 [2023-11-29 01:11:59,155 INFO L226 Difference]: Without dead ends: 89 [2023-11-29 01:11:59,155 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 100 SyntacticMatches, 13 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=541, Unknown=0, NotChecked=0, Total=702 [2023-11-29 01:11:59,156 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 31 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:11:59,156 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 41 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 01:11:59,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-11-29 01:11:59,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2023-11-29 01:11:59,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.125) internal successors, (99), 88 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:11:59,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 99 transitions. [2023-11-29 01:11:59,212 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 99 transitions. Word has length 61 [2023-11-29 01:11:59,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:11:59,212 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 99 transitions. [2023-11-29 01:11:59,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 26 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:11:59,212 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 99 transitions. [2023-11-29 01:11:59,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-11-29 01:11:59,213 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:11:59,213 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:11:59,218 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 01:11:59,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 01:11:59,414 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:11:59,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:11:59,414 INFO L85 PathProgramCache]: Analyzing trace with hash 208470467, now seen corresponding path program 16 times [2023-11-29 01:11:59,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:11:59,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612313583] [2023-11-29 01:11:59,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:11:59,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:11:59,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:11:59,606 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 15 proven. 34 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-11-29 01:11:59,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:11:59,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612313583] [2023-11-29 01:11:59,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612313583] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:11:59,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912940721] [2023-11-29 01:11:59,607 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 01:11:59,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:11:59,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:11:59,608 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:11:59,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 01:11:59,694 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 01:11:59,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:11:59,696 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-29 01:11:59,698 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:11:59,923 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-11-29 01:11:59,923 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:12:00,165 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-11-29 01:12:00,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912940721] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:12:00,165 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:12:00,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 39 [2023-11-29 01:12:00,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085237247] [2023-11-29 01:12:00,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:12:00,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-11-29 01:12:00,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:12:00,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-11-29 01:12:00,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=1265, Unknown=0, NotChecked=0, Total=1482 [2023-11-29 01:12:00,167 INFO L87 Difference]: Start difference. First operand 89 states and 99 transitions. Second operand has 39 states, 39 states have (on average 1.6153846153846154) internal successors, (63), 39 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:12:00,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:12:00,547 INFO L93 Difference]: Finished difference Result 139 states and 159 transitions. [2023-11-29 01:12:00,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 01:12:00,547 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.6153846153846154) internal successors, (63), 39 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) Word has length 62 [2023-11-29 01:12:00,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:12:00,548 INFO L225 Difference]: With dead ends: 139 [2023-11-29 01:12:00,548 INFO L226 Difference]: Without dead ends: 68 [2023-11-29 01:12:00,548 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 94 SyntacticMatches, 8 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=317, Invalid=1845, Unknown=0, NotChecked=0, Total=2162 [2023-11-29 01:12:00,549 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 71 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:12:00,549 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 44 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 01:12:00,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-11-29 01:12:00,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2023-11-29 01:12:00,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.1044776119402986) internal successors, (74), 67 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:12:00,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 74 transitions. [2023-11-29 01:12:00,595 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 74 transitions. Word has length 62 [2023-11-29 01:12:00,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:12:00,595 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 74 transitions. [2023-11-29 01:12:00,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.6153846153846154) internal successors, (63), 39 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:12:00,595 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 74 transitions. [2023-11-29 01:12:00,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-11-29 01:12:00,596 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:12:00,596 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:12:00,600 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 01:12:00,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:12:00,797 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:12:00,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:12:00,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1212800394, now seen corresponding path program 17 times [2023-11-29 01:12:00,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:12:00,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600095994] [2023-11-29 01:12:00,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:12:00,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:12:00,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:12:07,603 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 18 proven. 178 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:12:07,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:12:07,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600095994] [2023-11-29 01:12:07,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600095994] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:12:07,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806744617] [2023-11-29 01:12:07,604 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 01:12:07,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:12:07,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:12:07,605 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:12:07,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 01:12:07,852 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-11-29 01:12:07,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:12:07,858 WARN L260 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 194 conjunts are in the unsatisfiable core [2023-11-29 01:12:07,862 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:12:08,048 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 [2023-11-29 01:12:08,453 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:12:08,453 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:12:10,034 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 168 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-29 01:12:10,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806744617] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:12:10,034 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:12:10,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 27, 19] total 74 [2023-11-29 01:12:10,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485013822] [2023-11-29 01:12:10,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:12:10,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2023-11-29 01:12:10,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:12:10,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2023-11-29 01:12:10,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=5109, Unknown=0, NotChecked=0, Total=5402 [2023-11-29 01:12:10,037 INFO L87 Difference]: Start difference. First operand 68 states and 74 transitions. Second operand has 74 states, 74 states have (on average 2.175675675675676) internal successors, (161), 74 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:12:14,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:12:14,963 INFO L93 Difference]: Finished difference Result 184 states and 203 transitions. [2023-11-29 01:12:14,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-11-29 01:12:14,963 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.175675675675676) internal successors, (161), 74 states have internal predecessors, (161), 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 67 [2023-11-29 01:12:14,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:12:14,965 INFO L225 Difference]: With dead ends: 184 [2023-11-29 01:12:14,965 INFO L226 Difference]: Without dead ends: 180 [2023-11-29 01:12:14,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3073 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=1055, Invalid=11827, Unknown=0, NotChecked=0, Total=12882 [2023-11-29 01:12:14,966 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 75 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 2977 mSolverCounterSat, 402 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 3379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 402 IncrementalHoareTripleChecker+Valid, 2977 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:12:14,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 325 Invalid, 3379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [402 Valid, 2977 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-11-29 01:12:14,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2023-11-29 01:12:15,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 98. [2023-11-29 01:12:15,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 1.1134020618556701) internal successors, (108), 97 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:12:15,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 108 transitions. [2023-11-29 01:12:15,039 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 108 transitions. Word has length 67 [2023-11-29 01:12:15,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:12:15,039 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 108 transitions. [2023-11-29 01:12:15,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.175675675675676) internal successors, (161), 74 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:12:15,040 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 108 transitions. [2023-11-29 01:12:15,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-29 01:12:15,040 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:12:15,040 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:12:15,046 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 01:12:15,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:12:15,241 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:12:15,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:12:15,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1443958219, now seen corresponding path program 18 times [2023-11-29 01:12:15,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:12:15,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275811306] [2023-11-29 01:12:15,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:12:15,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:12:15,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:12:15,464 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 29 proven. 35 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2023-11-29 01:12:15,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:12:15,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275811306] [2023-11-29 01:12:15,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275811306] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:12:15,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764687618] [2023-11-29 01:12:15,464 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 01:12:15,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:12:15,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:12:15,465 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:12:15,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 01:12:15,685 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-11-29 01:12:15,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:12:15,687 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 01:12:15,689 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:12:15,858 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2023-11-29 01:12:15,858 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:12:15,977 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2023-11-29 01:12:15,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764687618] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:12:15,977 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:12:15,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2023-11-29 01:12:15,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532462356] [2023-11-29 01:12:15,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:12:15,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-29 01:12:15,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:12:15,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-29 01:12:15,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=618, Unknown=0, NotChecked=0, Total=812 [2023-11-29 01:12:15,979 INFO L87 Difference]: Start difference. First operand 98 states and 108 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:12:16,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:12:16,300 INFO L93 Difference]: Finished difference Result 233 states and 258 transitions. [2023-11-29 01:12:16,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-29 01:12:16,300 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2023-11-29 01:12:16,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:12:16,301 INFO L225 Difference]: With dead ends: 233 [2023-11-29 01:12:16,301 INFO L226 Difference]: Without dead ends: 99 [2023-11-29 01:12:16,302 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 111 SyntacticMatches, 15 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=198, Invalid=672, Unknown=0, NotChecked=0, Total=870 [2023-11-29 01:12:16,302 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 32 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:12:16,303 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 38 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 01:12:16,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2023-11-29 01:12:16,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2023-11-29 01:12:16,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.1122448979591837) internal successors, (109), 98 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) [2023-11-29 01:12:16,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 109 transitions. [2023-11-29 01:12:16,368 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 109 transitions. Word has length 68 [2023-11-29 01:12:16,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:12:16,368 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 109 transitions. [2023-11-29 01:12:16,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:12:16,368 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 109 transitions. [2023-11-29 01:12:16,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-29 01:12:16,368 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:12:16,368 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:12:16,373 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-29 01:12:16,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-29 01:12:16,569 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:12:16,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:12:16,569 INFO L85 PathProgramCache]: Analyzing trace with hash -66921475, now seen corresponding path program 19 times [2023-11-29 01:12:16,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:12:16,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584565328] [2023-11-29 01:12:16,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:12:16,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:12:16,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:12:16,791 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 21 proven. 43 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2023-11-29 01:12:16,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:12:16,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584565328] [2023-11-29 01:12:16,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584565328] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:12:16,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643876622] [2023-11-29 01:12:16,791 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 01:12:16,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:12:16,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:12:16,792 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:12:16,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 01:12:16,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:12:16,899 INFO L262 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 01:12:16,901 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:12:17,034 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2023-11-29 01:12:17,034 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:12:17,173 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2023-11-29 01:12:17,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643876622] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:12:17,174 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:12:17,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2023-11-29 01:12:17,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791450042] [2023-11-29 01:12:17,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:12:17,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-29 01:12:17,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:12:17,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-29 01:12:17,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=611, Unknown=0, NotChecked=0, Total=812 [2023-11-29 01:12:17,175 INFO L87 Difference]: Start difference. First operand 99 states and 109 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:12:17,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:12:17,391 INFO L93 Difference]: Finished difference Result 154 states and 174 transitions. [2023-11-29 01:12:17,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-29 01:12:17,391 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2023-11-29 01:12:17,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:12:17,392 INFO L225 Difference]: With dead ends: 154 [2023-11-29 01:12:17,392 INFO L226 Difference]: Without dead ends: 75 [2023-11-29 01:12:17,392 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 112 SyntacticMatches, 16 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=658, Unknown=0, NotChecked=0, Total=870 [2023-11-29 01:12:17,393 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 27 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:12:17,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 38 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:12:17,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-11-29 01:12:17,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2023-11-29 01:12:17,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.0945945945945945) internal successors, (81), 74 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) [2023-11-29 01:12:17,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 81 transitions. [2023-11-29 01:12:17,445 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 81 transitions. Word has length 69 [2023-11-29 01:12:17,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:12:17,446 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 81 transitions. [2023-11-29 01:12:17,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:12:17,446 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 81 transitions. [2023-11-29 01:12:17,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-11-29 01:12:17,446 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:12:17,446 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:12:17,451 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 01:12:17,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:12:17,647 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:12:17,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:12:17,648 INFO L85 PathProgramCache]: Analyzing trace with hash 310620448, now seen corresponding path program 20 times [2023-11-29 01:12:17,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:12:17,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482835025] [2023-11-29 01:12:17,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:12:17,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:12:17,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:12:25,631 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 10 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:12:25,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:12:25,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482835025] [2023-11-29 01:12:25,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482835025] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:12:25,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182899975] [2023-11-29 01:12:25,631 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 01:12:25,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:12:25,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:12:25,632 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:12:25,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 01:12:25,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 01:12:25,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:12:25,744 WARN L260 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 220 conjunts are in the unsatisfiable core [2023-11-29 01:12:25,748 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:12:25,948 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 [2023-11-29 01:12:26,618 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 252 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:12:26,618 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:12:28,666 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 216 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-29 01:12:28,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182899975] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:12:28,666 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:12:28,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 30, 21] total 84 [2023-11-29 01:12:28,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689493404] [2023-11-29 01:12:28,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:12:28,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2023-11-29 01:12:28,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:12:28,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2023-11-29 01:12:28,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=343, Invalid=6629, Unknown=0, NotChecked=0, Total=6972 [2023-11-29 01:12:28,668 INFO L87 Difference]: Start difference. First operand 75 states and 81 transitions. Second operand has 84 states, 84 states have (on average 2.1547619047619047) internal successors, (181), 84 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:12:35,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:12:35,754 INFO L93 Difference]: Finished difference Result 217 states and 237 transitions. [2023-11-29 01:12:35,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2023-11-29 01:12:35,754 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.1547619047619047) internal successors, (181), 84 states have internal predecessors, (181), 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 74 [2023-11-29 01:12:35,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:12:35,756 INFO L225 Difference]: With dead ends: 217 [2023-11-29 01:12:35,756 INFO L226 Difference]: Without dead ends: 213 [2023-11-29 01:12:35,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4125 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=1301, Invalid=16255, Unknown=0, NotChecked=0, Total=17556 [2023-11-29 01:12:35,757 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 52 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 3652 mSolverCounterSat, 395 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 4047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 395 IncrementalHoareTripleChecker+Valid, 3652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-11-29 01:12:35,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 258 Invalid, 4047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [395 Valid, 3652 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-11-29 01:12:35,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2023-11-29 01:12:35,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 150. [2023-11-29 01:12:35,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 1.1140939597315436) internal successors, (166), 149 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:12:35,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 166 transitions. [2023-11-29 01:12:35,866 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 166 transitions. Word has length 74 [2023-11-29 01:12:35,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:12:35,866 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 166 transitions. [2023-11-29 01:12:35,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 2.1547619047619047) internal successors, (181), 84 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:12:35,866 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 166 transitions. [2023-11-29 01:12:35,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-11-29 01:12:35,867 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:12:35,867 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:12:35,872 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-29 01:12:36,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:12:36,069 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:12:36,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:12:36,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1328740555, now seen corresponding path program 21 times [2023-11-29 01:12:36,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:12:36,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201774578] [2023-11-29 01:12:36,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:12:36,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:12:36,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:12:36,414 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 37 proven. 44 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2023-11-29 01:12:36,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:12:36,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201774578] [2023-11-29 01:12:36,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201774578] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:12:36,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016726384] [2023-11-29 01:12:36,415 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 01:12:36,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:12:36,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:12:36,416 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:12:36,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 01:12:36,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-11-29 01:12:36,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:12:36,647 INFO L262 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-29 01:12:36,649 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:12:37,009 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 36 proven. 45 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2023-11-29 01:12:37,010 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:12:37,339 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 36 proven. 45 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2023-11-29 01:12:37,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016726384] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:12:37,340 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:12:37,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 49 [2023-11-29 01:12:37,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898338739] [2023-11-29 01:12:37,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:12:37,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-11-29 01:12:37,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:12:37,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-11-29 01:12:37,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=2029, Unknown=0, NotChecked=0, Total=2352 [2023-11-29 01:12:37,341 INFO L87 Difference]: Start difference. First operand 150 states and 166 transitions. Second operand has 49 states, 49 states have (on average 1.7551020408163265) internal successors, (86), 49 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:12:38,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:12:38,704 INFO L93 Difference]: Finished difference Result 312 states and 348 transitions. [2023-11-29 01:12:38,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-11-29 01:12:38,704 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.7551020408163265) internal successors, (86), 49 states have internal predecessors, (86), 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 75 [2023-11-29 01:12:38,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:12:38,705 INFO L225 Difference]: With dead ends: 312 [2023-11-29 01:12:38,705 INFO L226 Difference]: Without dead ends: 154 [2023-11-29 01:12:38,705 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 123 SyntacticMatches, 10 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1642 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=676, Invalid=4154, Unknown=0, NotChecked=0, Total=4830 [2023-11-29 01:12:38,706 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 95 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 1880 mSolverCounterSat, 262 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 2142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 262 IncrementalHoareTripleChecker+Valid, 1880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-29 01:12:38,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 85 Invalid, 2142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [262 Valid, 1880 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-29 01:12:38,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2023-11-29 01:12:38,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 113. [2023-11-29 01:12:38,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.0982142857142858) internal successors, (123), 112 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:12:38,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 123 transitions. [2023-11-29 01:12:38,796 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 123 transitions. Word has length 75 [2023-11-29 01:12:38,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:12:38,796 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 123 transitions. [2023-11-29 01:12:38,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.7551020408163265) internal successors, (86), 49 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:12:38,796 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 123 transitions. [2023-11-29 01:12:38,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-11-29 01:12:38,796 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:12:38,796 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:12:38,801 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-29 01:12:38,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-29 01:12:38,997 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:12:38,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:12:38,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1267698436, now seen corresponding path program 22 times [2023-11-29 01:12:38,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:12:38,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943225952] [2023-11-29 01:12:38,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:12:38,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:12:39,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:12:39,261 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 28 proven. 53 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2023-11-29 01:12:39,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:12:39,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943225952] [2023-11-29 01:12:39,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943225952] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:12:39,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734762379] [2023-11-29 01:12:39,262 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 01:12:39,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:12:39,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:12:39,262 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:12:39,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-29 01:12:39,365 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 01:12:39,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:12:39,367 INFO L262 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-29 01:12:39,369 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:12:39,755 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2023-11-29 01:12:39,755 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:12:40,114 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2023-11-29 01:12:40,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734762379] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:12:40,115 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:12:40,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 49 [2023-11-29 01:12:40,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297671627] [2023-11-29 01:12:40,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:12:40,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-11-29 01:12:40,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:12:40,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-11-29 01:12:40,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=2021, Unknown=0, NotChecked=0, Total=2352 [2023-11-29 01:12:40,116 INFO L87 Difference]: Start difference. First operand 113 states and 123 transitions. Second operand has 49 states, 49 states have (on average 1.7346938775510203) internal successors, (85), 49 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:12:40,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:12:40,666 INFO L93 Difference]: Finished difference Result 162 states and 176 transitions. [2023-11-29 01:12:40,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-29 01:12:40,667 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.7346938775510203) internal successors, (85), 49 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 76 [2023-11-29 01:12:40,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:12:40,667 INFO L225 Difference]: With dead ends: 162 [2023-11-29 01:12:40,667 INFO L226 Difference]: Without dead ends: 82 [2023-11-29 01:12:40,668 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 114 SyntacticMatches, 10 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1208 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=486, Invalid=2936, Unknown=0, NotChecked=0, Total=3422 [2023-11-29 01:12:40,668 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 77 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 01:12:40,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 78 Invalid, 742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 01:12:40,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-11-29 01:12:40,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2023-11-29 01:12:40,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.0864197530864197) internal successors, (88), 81 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:12:40,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 88 transitions. [2023-11-29 01:12:40,738 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 88 transitions. Word has length 76 [2023-11-29 01:12:40,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:12:40,738 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 88 transitions. [2023-11-29 01:12:40,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.7346938775510203) internal successors, (85), 49 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:12:40,738 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 88 transitions. [2023-11-29 01:12:40,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-11-29 01:12:40,738 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:12:40,738 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:12:40,743 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-29 01:12:40,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-29 01:12:40,939 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:12:40,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:12:40,939 INFO L85 PathProgramCache]: Analyzing trace with hash -946274550, now seen corresponding path program 23 times [2023-11-29 01:12:40,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:12:40,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701359944] [2023-11-29 01:12:40,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:12:40,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:12:41,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:12:51,573 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 31 proven. 284 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:12:51,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:12:51,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701359944] [2023-11-29 01:12:51,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701359944] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:12:51,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163431380] [2023-11-29 01:12:51,573 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 01:12:51,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:12:51,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:12:51,574 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:12:51,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-29 01:12:51,835 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-11-29 01:12:51,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:12:51,841 WARN L260 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 246 conjunts are in the unsatisfiable core [2023-11-29 01:12:51,845 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:12:52,158 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 [2023-11-29 01:12:53,061 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:12:53,061 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:12:55,993 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 270 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 01:12:55,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163431380] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:12:55,994 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:12:55,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 33, 23] total 97 [2023-11-29 01:12:55,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422960265] [2023-11-29 01:12:55,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:12:55,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2023-11-29 01:12:55,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:12:55,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2023-11-29 01:12:55,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=410, Invalid=8902, Unknown=0, NotChecked=0, Total=9312 [2023-11-29 01:12:55,996 INFO L87 Difference]: Start difference. First operand 82 states and 88 transitions. Second operand has 97 states, 97 states have (on average 2.082474226804124) internal successors, (202), 97 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:13:05,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:13:05,623 INFO L93 Difference]: Finished difference Result 220 states and 239 transitions. [2023-11-29 01:13:05,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2023-11-29 01:13:05,625 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.082474226804124) internal successors, (202), 97 states have internal predecessors, (202), 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 81 [2023-11-29 01:13:05,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:13:05,626 INFO L225 Difference]: With dead ends: 220 [2023-11-29 01:13:05,626 INFO L226 Difference]: Without dead ends: 216 [2023-11-29 01:13:05,627 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5240 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=1558, Invalid=19904, Unknown=0, NotChecked=0, Total=21462 [2023-11-29 01:13:05,628 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 70 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 4240 mSolverCounterSat, 514 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 4754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 514 IncrementalHoareTripleChecker+Valid, 4240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2023-11-29 01:13:05,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 350 Invalid, 4754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [514 Valid, 4240 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2023-11-29 01:13:05,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2023-11-29 01:13:05,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 118. [2023-11-29 01:13:05,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.0940170940170941) internal successors, (128), 117 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) [2023-11-29 01:13:05,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 128 transitions. [2023-11-29 01:13:05,754 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 128 transitions. Word has length 81 [2023-11-29 01:13:05,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:13:05,754 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 128 transitions. [2023-11-29 01:13:05,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.082474226804124) internal successors, (202), 97 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:13:05,755 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 128 transitions. [2023-11-29 01:13:05,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-11-29 01:13:05,755 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:13:05,755 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:13:05,761 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-11-29 01:13:05,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:13:05,956 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:13:05,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:13:05,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1528640437, now seen corresponding path program 24 times [2023-11-29 01:13:05,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:13:05,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011017322] [2023-11-29 01:13:05,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:13:05,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:13:05,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:13:06,266 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 46 proven. 54 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2023-11-29 01:13:06,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:13:06,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011017322] [2023-11-29 01:13:06,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011017322] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:13:06,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004880301] [2023-11-29 01:13:06,267 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 01:13:06,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:13:06,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:13:06,268 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:13:06,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-29 01:13:06,583 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2023-11-29 01:13:06,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:13:06,586 INFO L262 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-29 01:13:06,588 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:13:06,833 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2023-11-29 01:13:06,833 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:13:07,014 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2023-11-29 01:13:07,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004880301] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:13:07,014 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:13:07,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 35 [2023-11-29 01:13:07,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582357946] [2023-11-29 01:13:07,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:13:07,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-29 01:13:07,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:13:07,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-29 01:13:07,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=910, Unknown=0, NotChecked=0, Total=1190 [2023-11-29 01:13:07,016 INFO L87 Difference]: Start difference. First operand 118 states and 128 transitions. Second operand has 35 states, 35 states have (on average 1.6285714285714286) internal successors, (57), 35 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:13:07,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:13:07,618 INFO L93 Difference]: Finished difference Result 281 states and 306 transitions. [2023-11-29 01:13:07,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-29 01:13:07,618 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6285714285714286) internal successors, (57), 35 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2023-11-29 01:13:07,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:13:07,619 INFO L225 Difference]: With dead ends: 281 [2023-11-29 01:13:07,619 INFO L226 Difference]: Without dead ends: 119 [2023-11-29 01:13:07,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 133 SyntacticMatches, 19 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 729 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=284, Invalid=976, Unknown=0, NotChecked=0, Total=1260 [2023-11-29 01:13:07,620 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 42 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 01:13:07,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 65 Invalid, 691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 01:13:07,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2023-11-29 01:13:07,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2023-11-29 01:13:07,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 1.0932203389830508) internal successors, (129), 118 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:13:07,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 129 transitions. [2023-11-29 01:13:07,731 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 129 transitions. Word has length 82 [2023-11-29 01:13:07,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:13:07,731 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 129 transitions. [2023-11-29 01:13:07,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.6285714285714286) internal successors, (57), 35 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:13:07,732 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 129 transitions. [2023-11-29 01:13:07,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-11-29 01:13:07,732 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:13:07,732 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:13:07,737 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-11-29 01:13:07,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-29 01:13:07,933 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:13:07,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:13:07,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1385243907, now seen corresponding path program 25 times [2023-11-29 01:13:07,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:13:07,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614308498] [2023-11-29 01:13:07,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:13:07,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:13:07,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:13:08,267 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 36 proven. 64 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2023-11-29 01:13:08,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:13:08,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614308498] [2023-11-29 01:13:08,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614308498] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:13:08,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849434039] [2023-11-29 01:13:08,268 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 01:13:08,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:13:08,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:13:08,269 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:13:08,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-29 01:13:08,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:13:08,407 INFO L262 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-29 01:13:08,409 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:13:08,585 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 45 proven. 55 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2023-11-29 01:13:08,585 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:13:08,759 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 45 proven. 55 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2023-11-29 01:13:08,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849434039] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:13:08,759 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:13:08,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 35 [2023-11-29 01:13:08,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004597727] [2023-11-29 01:13:08,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:13:08,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-29 01:13:08,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:13:08,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-29 01:13:08,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=901, Unknown=0, NotChecked=0, Total=1190 [2023-11-29 01:13:08,761 INFO L87 Difference]: Start difference. First operand 119 states and 129 transitions. Second operand has 35 states, 35 states have (on average 1.6285714285714286) internal successors, (57), 35 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:13:09,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:13:09,115 INFO L93 Difference]: Finished difference Result 184 states and 204 transitions. [2023-11-29 01:13:09,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-29 01:13:09,116 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6285714285714286) internal successors, (57), 35 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2023-11-29 01:13:09,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:13:09,116 INFO L225 Difference]: With dead ends: 184 [2023-11-29 01:13:09,116 INFO L226 Difference]: Without dead ends: 89 [2023-11-29 01:13:09,117 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 134 SyntacticMatches, 20 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 828 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=302, Invalid=958, Unknown=0, NotChecked=0, Total=1260 [2023-11-29 01:13:09,117 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 22 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:13:09,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 54 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 01:13:09,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-11-29 01:13:09,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2023-11-29 01:13:09,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.0795454545454546) internal successors, (95), 88 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) [2023-11-29 01:13:09,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 95 transitions. [2023-11-29 01:13:09,218 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 95 transitions. Word has length 83 [2023-11-29 01:13:09,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:13:09,218 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 95 transitions. [2023-11-29 01:13:09,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.6285714285714286) internal successors, (57), 35 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:13:09,218 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 95 transitions. [2023-11-29 01:13:09,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-11-29 01:13:09,219 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:13:09,219 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:13:09,223 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-11-29 01:13:09,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-29 01:13:09,420 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:13:09,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:13:09,420 INFO L85 PathProgramCache]: Analyzing trace with hash -418796896, now seen corresponding path program 26 times [2023-11-29 01:13:09,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:13:09,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755602935] [2023-11-29 01:13:09,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:13:09,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:13:09,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:13:23,084 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 16 proven. 369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:13:23,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:13:23,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755602935] [2023-11-29 01:13:23,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755602935] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:13:23,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138154856] [2023-11-29 01:13:23,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 01:13:23,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:13:23,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:13:23,085 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:13:23,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-29 01:13:23,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 01:13:23,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:13:23,249 WARN L260 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 272 conjunts are in the unsatisfiable core [2023-11-29 01:13:23,255 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:13:23,406 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 [2023-11-29 01:13:24,416 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 0 proven. 385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:13:24,416 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:13:27,767 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-29 01:13:27,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138154856] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:13:27,768 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:13:27,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 36, 25] total 102 [2023-11-29 01:13:27,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780631070] [2023-11-29 01:13:27,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:13:27,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2023-11-29 01:13:27,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:13:27,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2023-11-29 01:13:27,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=487, Invalid=9815, Unknown=0, NotChecked=0, Total=10302 [2023-11-29 01:13:27,770 INFO L87 Difference]: Start difference. First operand 89 states and 95 transitions. Second operand has 102 states, 102 states have (on average 2.127450980392157) internal successors, (217), 102 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:13:36,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:13:36,679 INFO L93 Difference]: Finished difference Result 248 states and 271 transitions. [2023-11-29 01:13:36,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2023-11-29 01:13:36,680 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 2.127450980392157) internal successors, (217), 102 states have internal predecessors, (217), 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 88 [2023-11-29 01:13:36,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:13:36,681 INFO L225 Difference]: With dead ends: 248 [2023-11-29 01:13:36,681 INFO L226 Difference]: Without dead ends: 244 [2023-11-29 01:13:36,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5571 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=1311, Invalid=20151, Unknown=0, NotChecked=0, Total=21462 [2023-11-29 01:13:36,683 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 59 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 5215 mSolverCounterSat, 342 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 5557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 342 IncrementalHoareTripleChecker+Valid, 5215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:13:36,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 296 Invalid, 5557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [342 Valid, 5215 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2023-11-29 01:13:36,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2023-11-29 01:13:36,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 153. [2023-11-29 01:13:36,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.0921052631578947) internal successors, (166), 152 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:13:36,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 166 transitions. [2023-11-29 01:13:36,836 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 166 transitions. Word has length 88 [2023-11-29 01:13:36,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:13:36,837 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 166 transitions. [2023-11-29 01:13:36,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 2.127450980392157) internal successors, (217), 102 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:13:36,837 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 166 transitions. [2023-11-29 01:13:36,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-11-29 01:13:36,837 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:13:36,837 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:13:36,843 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-11-29 01:13:37,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-29 01:13:37,038 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:13:37,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:13:37,038 INFO L85 PathProgramCache]: Analyzing trace with hash 575718069, now seen corresponding path program 27 times [2023-11-29 01:13:37,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:13:37,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007223006] [2023-11-29 01:13:37,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:13:37,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:13:37,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:13:37,397 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 56 proven. 65 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2023-11-29 01:13:37,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:13:37,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007223006] [2023-11-29 01:13:37,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007223006] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:13:37,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133475069] [2023-11-29 01:13:37,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 01:13:37,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:13:37,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:13:37,399 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:13:37,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-29 01:13:37,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-11-29 01:13:37,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:13:37,704 INFO L262 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-29 01:13:37,706 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:13:38,171 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 55 proven. 66 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2023-11-29 01:13:38,171 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:13:38,602 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 55 proven. 66 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2023-11-29 01:13:38,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133475069] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:13:38,602 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:13:38,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 59 [2023-11-29 01:13:38,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936460464] [2023-11-29 01:13:38,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:13:38,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2023-11-29 01:13:38,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:13:38,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2023-11-29 01:13:38,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=459, Invalid=2963, Unknown=0, NotChecked=0, Total=3422 [2023-11-29 01:13:38,604 INFO L87 Difference]: Start difference. First operand 153 states and 166 transitions. Second operand has 59 states, 59 states have (on average 1.576271186440678) internal successors, (93), 59 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:13:40,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:13:40,355 INFO L93 Difference]: Finished difference Result 346 states and 380 transitions. [2023-11-29 01:13:40,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-11-29 01:13:40,355 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.576271186440678) internal successors, (93), 59 states have internal predecessors, (93), 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 89 [2023-11-29 01:13:40,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:13:40,357 INFO L225 Difference]: With dead ends: 346 [2023-11-29 01:13:40,357 INFO L226 Difference]: Without dead ends: 169 [2023-11-29 01:13:40,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 145 SyntacticMatches, 12 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2448 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=954, Invalid=6018, Unknown=0, NotChecked=0, Total=6972 [2023-11-29 01:13:40,358 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 105 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 2379 mSolverCounterSat, 339 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 2718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 339 IncrementalHoareTripleChecker+Valid, 2379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:13:40,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 92 Invalid, 2718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [339 Valid, 2379 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-29 01:13:40,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2023-11-29 01:13:40,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 133. [2023-11-29 01:13:40,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.0833333333333333) internal successors, (143), 132 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:13:40,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 143 transitions. [2023-11-29 01:13:40,501 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 143 transitions. Word has length 89 [2023-11-29 01:13:40,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:13:40,501 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 143 transitions. [2023-11-29 01:13:40,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.576271186440678) internal successors, (93), 59 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:13:40,501 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 143 transitions. [2023-11-29 01:13:40,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-11-29 01:13:40,501 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:13:40,501 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:13:40,506 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-11-29 01:13:40,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:13:40,702 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:13:40,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:13:40,702 INFO L85 PathProgramCache]: Analyzing trace with hash 144562940, now seen corresponding path program 28 times [2023-11-29 01:13:40,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:13:40,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787558075] [2023-11-29 01:13:40,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:13:40,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:13:40,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:13:41,063 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 45 proven. 76 refuted. 0 times theorem prover too weak. 286 trivial. 0 not checked. [2023-11-29 01:13:41,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:13:41,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787558075] [2023-11-29 01:13:41,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787558075] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:13:41,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444473496] [2023-11-29 01:13:41,064 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 01:13:41,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:13:41,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:13:41,065 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:13:41,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-29 01:13:41,198 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 01:13:41,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:13:41,200 INFO L262 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-29 01:13:41,202 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:13:41,707 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 286 trivial. 0 not checked. [2023-11-29 01:13:41,708 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:13:42,155 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 286 trivial. 0 not checked. [2023-11-29 01:13:42,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444473496] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:13:42,156 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:13:42,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 59 [2023-11-29 01:13:42,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205704457] [2023-11-29 01:13:42,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:13:42,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2023-11-29 01:13:42,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:13:42,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2023-11-29 01:13:42,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=469, Invalid=2953, Unknown=0, NotChecked=0, Total=3422 [2023-11-29 01:13:42,158 INFO L87 Difference]: Start difference. First operand 133 states and 143 transitions. Second operand has 59 states, 59 states have (on average 1.6101694915254237) internal successors, (95), 59 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) [2023-11-29 01:13:42,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:13:42,868 INFO L93 Difference]: Finished difference Result 190 states and 204 transitions. [2023-11-29 01:13:42,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-29 01:13:42,868 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.6101694915254237) internal successors, (95), 59 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 90 [2023-11-29 01:13:42,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:13:42,869 INFO L225 Difference]: With dead ends: 190 [2023-11-29 01:13:42,869 INFO L226 Difference]: Without dead ends: 96 [2023-11-29 01:13:42,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 134 SyntacticMatches, 12 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1819 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=691, Invalid=4279, Unknown=0, NotChecked=0, Total=4970 [2023-11-29 01:13:42,870 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 90 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 272 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 272 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 01:13:42,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 66 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [272 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 01:13:42,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2023-11-29 01:13:42,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2023-11-29 01:13:42,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.0736842105263158) internal successors, (102), 95 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:13:42,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 102 transitions. [2023-11-29 01:13:42,981 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 102 transitions. Word has length 90 [2023-11-29 01:13:42,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:13:42,981 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 102 transitions. [2023-11-29 01:13:42,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.6101694915254237) internal successors, (95), 59 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) [2023-11-29 01:13:42,981 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 102 transitions. [2023-11-29 01:13:42,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-11-29 01:13:42,981 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:13:42,981 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:13:42,986 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-11-29 01:13:43,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:13:43,182 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:13:43,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:13:43,182 INFO L85 PathProgramCache]: Analyzing trace with hash -682250102, now seen corresponding path program 29 times [2023-11-29 01:13:43,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:13:43,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942298018] [2023-11-29 01:13:43,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:13:43,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:13:43,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:13:59,374 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 37 proven. 425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:13:59,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:13:59,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942298018] [2023-11-29 01:13:59,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942298018] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:13:59,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171829914] [2023-11-29 01:13:59,374 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 01:13:59,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:13:59,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:13:59,375 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:13:59,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-29 01:13:59,821 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-11-29 01:13:59,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:13:59,829 WARN L260 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 310 conjunts are in the unsatisfiable core [2023-11-29 01:13:59,835 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:13:59,865 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 [2023-11-29 01:13:59,876 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 [2023-11-29 01:13:59,885 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 [2023-11-29 01:13:59,895 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 [2023-11-29 01:13:59,902 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 [2023-11-29 01:13:59,981 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 [2023-11-29 01:14:00,059 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 [2023-11-29 01:14:00,876 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:14:00,876 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:14:05,563 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-11-29 01:14:05,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171829914] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:14:05,563 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:14:05,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 39, 27] total 108 [2023-11-29 01:14:05,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667118482] [2023-11-29 01:14:05,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:14:05,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2023-11-29 01:14:05,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:14:05,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2023-11-29 01:14:05,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=537, Invalid=11019, Unknown=0, NotChecked=0, Total=11556 [2023-11-29 01:14:05,566 INFO L87 Difference]: Start difference. First operand 96 states and 102 transitions. Second operand has 108 states, 108 states have (on average 2.1296296296296298) internal successors, (230), 108 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:14:17,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:14:17,058 INFO L93 Difference]: Finished difference Result 256 states and 275 transitions. [2023-11-29 01:14:17,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2023-11-29 01:14:17,059 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 2.1296296296296298) internal successors, (230), 108 states have internal predecessors, (230), 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 95 [2023-11-29 01:14:17,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:14:17,060 INFO L225 Difference]: With dead ends: 256 [2023-11-29 01:14:17,060 INFO L226 Difference]: Without dead ends: 252 [2023-11-29 01:14:17,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 170 SyntacticMatches, 2 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5401 ImplicationChecksByTransitivity, 15.7s TimeCoverageRelationStatistics Valid=1896, Invalid=23544, Unknown=0, NotChecked=0, Total=25440 [2023-11-29 01:14:17,061 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 91 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 4858 mSolverCounterSat, 543 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 5401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 543 IncrementalHoareTripleChecker+Valid, 4858 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2023-11-29 01:14:17,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 349 Invalid, 5401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [543 Valid, 4858 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2023-11-29 01:14:17,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2023-11-29 01:14:17,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 138. [2023-11-29 01:14:17,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 1.0802919708029197) internal successors, (148), 137 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) [2023-11-29 01:14:17,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 148 transitions. [2023-11-29 01:14:17,234 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 148 transitions. Word has length 95 [2023-11-29 01:14:17,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:14:17,234 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 148 transitions. [2023-11-29 01:14:17,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 2.1296296296296298) internal successors, (230), 108 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:14:17,234 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 148 transitions. [2023-11-29 01:14:17,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-11-29 01:14:17,235 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:14:17,235 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:14:17,241 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-11-29 01:14:17,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:14:17,436 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:14:17,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:14:17,436 INFO L85 PathProgramCache]: Analyzing trace with hash -932300085, now seen corresponding path program 30 times [2023-11-29 01:14:17,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:14:17,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111061600] [2023-11-29 01:14:17,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:14:17,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:14:17,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:14:17,835 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 67 proven. 77 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2023-11-29 01:14:17,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:14:17,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111061600] [2023-11-29 01:14:17,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111061600] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:14:17,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941330626] [2023-11-29 01:14:17,836 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 01:14:17,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:14:17,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:14:17,836 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:14:17,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-29 01:14:18,178 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-11-29 01:14:18,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:14:18,182 INFO L262 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-29 01:14:18,184 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:14:18,489 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2023-11-29 01:14:18,489 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:14:18,700 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2023-11-29 01:14:18,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941330626] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:14:18,701 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:14:18,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 41 [2023-11-29 01:14:18,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248159235] [2023-11-29 01:14:18,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:14:18,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-11-29 01:14:18,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:14:18,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-11-29 01:14:18,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=1258, Unknown=0, NotChecked=0, Total=1640 [2023-11-29 01:14:18,702 INFO L87 Difference]: Start difference. First operand 138 states and 148 transitions. Second operand has 41 states, 41 states have (on average 1.5365853658536586) internal successors, (63), 41 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:14:19,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:14:19,322 INFO L93 Difference]: Finished difference Result 329 states and 354 transitions. [2023-11-29 01:14:19,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-29 01:14:19,322 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.5365853658536586) internal successors, (63), 41 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) Word has length 96 [2023-11-29 01:14:19,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:14:19,323 INFO L225 Difference]: With dead ends: 329 [2023-11-29 01:14:19,323 INFO L226 Difference]: Without dead ends: 139 [2023-11-29 01:14:19,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 155 SyntacticMatches, 23 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1023 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=386, Invalid=1336, Unknown=0, NotChecked=0, Total=1722 [2023-11-29 01:14:19,324 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 48 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:14:19,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 29 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 01:14:19,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2023-11-29 01:14:19,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2023-11-29 01:14:19,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 1.0797101449275361) internal successors, (149), 138 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:14:19,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 149 transitions. [2023-11-29 01:14:19,518 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 149 transitions. Word has length 96 [2023-11-29 01:14:19,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:14:19,518 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 149 transitions. [2023-11-29 01:14:19,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.5365853658536586) internal successors, (63), 41 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:14:19,519 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 149 transitions. [2023-11-29 01:14:19,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-11-29 01:14:19,519 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:14:19,519 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:14:19,524 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-11-29 01:14:19,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-11-29 01:14:19,720 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:14:19,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:14:19,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1717152253, now seen corresponding path program 31 times [2023-11-29 01:14:19,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:14:19,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152632390] [2023-11-29 01:14:19,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:14:19,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:14:19,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:14:20,163 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 55 proven. 89 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2023-11-29 01:14:20,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:14:20,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152632390] [2023-11-29 01:14:20,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152632390] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:14:20,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249298523] [2023-11-29 01:14:20,164 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 01:14:20,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:14:20,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:14:20,165 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:14:20,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-29 01:14:20,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:14:20,323 INFO L262 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-29 01:14:20,325 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:14:20,551 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 66 proven. 78 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2023-11-29 01:14:20,551 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:14:20,850 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 66 proven. 78 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2023-11-29 01:14:20,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249298523] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:14:20,851 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:14:20,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 41 [2023-11-29 01:14:20,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720905843] [2023-11-29 01:14:20,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:14:20,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-11-29 01:14:20,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:14:20,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-11-29 01:14:20,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=393, Invalid=1247, Unknown=0, NotChecked=0, Total=1640 [2023-11-29 01:14:20,852 INFO L87 Difference]: Start difference. First operand 139 states and 149 transitions. Second operand has 41 states, 41 states have (on average 1.5365853658536586) internal successors, (63), 41 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:14:21,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:14:21,317 INFO L93 Difference]: Finished difference Result 214 states and 234 transitions. [2023-11-29 01:14:21,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-29 01:14:21,318 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.5365853658536586) internal successors, (63), 41 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) Word has length 97 [2023-11-29 01:14:21,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:14:21,319 INFO L225 Difference]: With dead ends: 214 [2023-11-29 01:14:21,319 INFO L226 Difference]: Without dead ends: 103 [2023-11-29 01:14:21,319 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 156 SyntacticMatches, 24 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1177 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=408, Invalid=1314, Unknown=0, NotChecked=0, Total=1722 [2023-11-29 01:14:21,320 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 24 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:14:21,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 48 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 01:14:21,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2023-11-29 01:14:21,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2023-11-29 01:14:21,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.0686274509803921) internal successors, (109), 102 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) [2023-11-29 01:14:21,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 109 transitions. [2023-11-29 01:14:21,451 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 109 transitions. Word has length 97 [2023-11-29 01:14:21,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:14:21,451 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 109 transitions. [2023-11-29 01:14:21,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.5365853658536586) internal successors, (63), 41 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:14:21,451 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 109 transitions. [2023-11-29 01:14:21,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-11-29 01:14:21,452 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:14:21,452 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:14:21,456 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-11-29 01:14:21,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-11-29 01:14:21,652 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:14:21,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:14:21,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1318196256, now seen corresponding path program 32 times [2023-11-29 01:14:21,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:14:21,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30926977] [2023-11-29 01:14:21,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:14:21,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:14:21,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:14:40,573 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 81 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:14:40,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:14:40,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30926977] [2023-11-29 01:14:40,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30926977] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:14:40,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021828704] [2023-11-29 01:14:40,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 01:14:40,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:14:40,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:14:40,575 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:14:40,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-11-29 01:14:40,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 01:14:40,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:14:40,772 WARN L260 TraceCheckSpWp]: Trace formula consists of 534 conjuncts, 324 conjunts are in the unsatisfiable core [2023-11-29 01:14:40,776 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:14:41,571 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 [2023-11-29 01:14:42,475 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 0 proven. 546 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:14:42,475 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:14:48,263 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 0 proven. 468 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-11-29 01:14:48,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021828704] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:14:48,263 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:14:48,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 42, 29] total 125 [2023-11-29 01:14:48,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985147155] [2023-11-29 01:14:48,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:14:48,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 125 states [2023-11-29 01:14:48,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:14:48,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2023-11-29 01:14:48,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=629, Invalid=14871, Unknown=0, NotChecked=0, Total=15500 [2023-11-29 01:14:48,266 INFO L87 Difference]: Start difference. First operand 103 states and 109 transitions. Second operand has 125 states, 125 states have (on average 2.032) internal successors, (254), 125 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:15:02,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:15:02,905 INFO L93 Difference]: Finished difference Result 274 states and 293 transitions. [2023-11-29 01:15:02,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2023-11-29 01:15:02,905 INFO L78 Accepts]: Start accepts. Automaton has has 125 states, 125 states have (on average 2.032) internal successors, (254), 125 states have internal predecessors, (254), 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 102 [2023-11-29 01:15:02,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:15:02,907 INFO L225 Difference]: With dead ends: 274 [2023-11-29 01:15:02,907 INFO L226 Difference]: Without dead ends: 270 [2023-11-29 01:15:02,909 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8258 ImplicationChecksByTransitivity, 19.2s TimeCoverageRelationStatistics Valid=2118, Invalid=30462, Unknown=0, NotChecked=0, Total=32580 [2023-11-29 01:15:02,909 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 72 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 6733 mSolverCounterSat, 880 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 7613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 880 IncrementalHoareTripleChecker+Valid, 6733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:15:02,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 463 Invalid, 7613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [880 Valid, 6733 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2023-11-29 01:15:02,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2023-11-29 01:15:03,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 148. [2023-11-29 01:15:03,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.0748299319727892) internal successors, (158), 147 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) [2023-11-29 01:15:03,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 158 transitions. [2023-11-29 01:15:03,125 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 158 transitions. Word has length 102 [2023-11-29 01:15:03,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:15:03,125 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 158 transitions. [2023-11-29 01:15:03,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 125 states, 125 states have (on average 2.032) internal successors, (254), 125 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:15:03,125 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 158 transitions. [2023-11-29 01:15:03,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-11-29 01:15:03,126 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:15:03,126 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:15:03,131 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2023-11-29 01:15:03,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-11-29 01:15:03,327 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:15:03,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:15:03,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1036013109, now seen corresponding path program 33 times [2023-11-29 01:15:03,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:15:03,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133338325] [2023-11-29 01:15:03,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:15:03,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:15:03,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:15:03,809 INFO L134 CoverageAnalysis]: Checked inductivity of 559 backedges. 79 proven. 90 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2023-11-29 01:15:03,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:15:03,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133338325] [2023-11-29 01:15:03,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133338325] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:15:03,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312860992] [2023-11-29 01:15:03,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 01:15:03,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:15:03,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:15:03,811 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:15:03,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-11-29 01:15:04,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-11-29 01:15:04,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:15:04,228 INFO L262 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-29 01:15:04,230 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:15:04,796 INFO L134 CoverageAnalysis]: Checked inductivity of 559 backedges. 78 proven. 91 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2023-11-29 01:15:04,796 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:15:05,322 INFO L134 CoverageAnalysis]: Checked inductivity of 559 backedges. 78 proven. 91 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2023-11-29 01:15:05,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312860992] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:15:05,322 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:15:05,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 69 [2023-11-29 01:15:05,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058423489] [2023-11-29 01:15:05,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:15:05,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2023-11-29 01:15:05,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:15:05,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2023-11-29 01:15:05,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=619, Invalid=4073, Unknown=0, NotChecked=0, Total=4692 [2023-11-29 01:15:05,325 INFO L87 Difference]: Start difference. First operand 148 states and 158 transitions. Second operand has 69 states, 69 states have (on average 1.4492753623188406) internal successors, (100), 69 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:15:07,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:15:07,605 INFO L93 Difference]: Finished difference Result 399 states and 432 transitions. [2023-11-29 01:15:07,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-11-29 01:15:07,606 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.4492753623188406) internal successors, (100), 69 states have internal predecessors, (100), 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 103 [2023-11-29 01:15:07,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:15:07,607 INFO L225 Difference]: With dead ends: 399 [2023-11-29 01:15:07,607 INFO L226 Difference]: Without dead ends: 195 [2023-11-29 01:15:07,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 167 SyntacticMatches, 14 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3414 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1280, Invalid=8226, Unknown=0, NotChecked=0, Total=9506 [2023-11-29 01:15:07,608 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 114 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 2816 mSolverCounterSat, 430 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 3246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 430 IncrementalHoareTripleChecker+Valid, 2816 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:15:07,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 99 Invalid, 3246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [430 Valid, 2816 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-29 01:15:07,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2023-11-29 01:15:07,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 153. [2023-11-29 01:15:07,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.0723684210526316) internal successors, (163), 152 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:15:07,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 163 transitions. [2023-11-29 01:15:07,826 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 163 transitions. Word has length 103 [2023-11-29 01:15:07,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:15:07,826 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 163 transitions. [2023-11-29 01:15:07,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.4492753623188406) internal successors, (100), 69 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:15:07,826 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 163 transitions. [2023-11-29 01:15:07,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-11-29 01:15:07,827 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:15:07,827 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:15:07,832 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2023-11-29 01:15:08,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-11-29 01:15:08,028 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:15:08,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:15:08,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1699590396, now seen corresponding path program 34 times [2023-11-29 01:15:08,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:15:08,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115446295] [2023-11-29 01:15:08,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:15:08,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:15:08,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:15:08,507 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 66 proven. 103 refuted. 0 times theorem prover too weak. 403 trivial. 0 not checked. [2023-11-29 01:15:08,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:15:08,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115446295] [2023-11-29 01:15:08,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115446295] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:15:08,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318611645] [2023-11-29 01:15:08,507 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 01:15:08,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:15:08,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:15:08,508 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:15:08,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-11-29 01:15:08,658 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 01:15:08,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:15:08,661 INFO L262 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-29 01:15:08,663 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:15:09,287 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 403 trivial. 0 not checked. [2023-11-29 01:15:09,287 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:15:09,880 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 403 trivial. 0 not checked. [2023-11-29 01:15:09,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318611645] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:15:09,881 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:15:09,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 69 [2023-11-29 01:15:09,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693348401] [2023-11-29 01:15:09,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:15:09,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2023-11-29 01:15:09,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:15:09,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2023-11-29 01:15:09,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=631, Invalid=4061, Unknown=0, NotChecked=0, Total=4692 [2023-11-29 01:15:09,883 INFO L87 Difference]: Start difference. First operand 153 states and 163 transitions. Second operand has 69 states, 69 states have (on average 1.5217391304347827) internal successors, (105), 69 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:15:10,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:15:10,732 INFO L93 Difference]: Finished difference Result 218 states and 232 transitions. [2023-11-29 01:15:10,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-29 01:15:10,733 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.5217391304347827) internal successors, (105), 69 states have internal predecessors, (105), 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 104 [2023-11-29 01:15:10,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:15:10,734 INFO L225 Difference]: With dead ends: 218 [2023-11-29 01:15:10,734 INFO L226 Difference]: Without dead ends: 110 [2023-11-29 01:15:10,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 154 SyntacticMatches, 14 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2554 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=932, Invalid=5874, Unknown=0, NotChecked=0, Total=6806 [2023-11-29 01:15:10,735 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 110 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 318 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 318 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 01:15:10,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 61 Invalid, 900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [318 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 01:15:10,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2023-11-29 01:15:10,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2023-11-29 01:15:10,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.0642201834862386) internal successors, (116), 109 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:15:10,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 116 transitions. [2023-11-29 01:15:10,904 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 116 transitions. Word has length 104 [2023-11-29 01:15:10,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:15:10,904 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 116 transitions. [2023-11-29 01:15:10,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.5217391304347827) internal successors, (105), 69 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:15:10,904 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 116 transitions. [2023-11-29 01:15:10,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-11-29 01:15:10,904 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:15:10,905 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:15:10,909 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2023-11-29 01:15:11,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-11-29 01:15:11,105 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:15:11,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:15:11,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1020268022, now seen corresponding path program 35 times [2023-11-29 01:15:11,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:15:11,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148233509] [2023-11-29 01:15:11,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:15:11,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:15:11,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:15:33,399 INFO L134 CoverageAnalysis]: Checked inductivity of 637 backedges. 65 proven. 572 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:15:33,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:15:33,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148233509] [2023-11-29 01:15:33,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148233509] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:15:33,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637052841] [2023-11-29 01:15:33,399 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 01:15:33,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:15:33,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:15:33,400 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:15:33,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-11-29 01:15:34,061 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2023-11-29 01:15:34,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:15:34,070 WARN L260 TraceCheckSpWp]: Trace formula consists of 573 conjuncts, 348 conjunts are in the unsatisfiable core [2023-11-29 01:15:34,075 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:15:35,491 INFO L134 CoverageAnalysis]: Checked inductivity of 637 backedges. 0 proven. 636 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 01:15:35,491 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:15:45,556 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 01:15:45,557 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 26 select indices, 26 select index equivalence classes, 0 disjoint index pairs (out of 325 index pairs), introduced 26 new quantified variables, introduced 325 case distinctions, treesize of input 222 treesize of output 1539 [2023-11-29 01:18:29,630 INFO L134 CoverageAnalysis]: Checked inductivity of 637 backedges. 0 proven. 546 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-11-29 01:18:29,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637052841] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:18:29,631 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:18:29,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 44, 32] total 131 [2023-11-29 01:18:29,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014248305] [2023-11-29 01:18:29,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:18:29,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2023-11-29 01:18:29,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:18:29,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2023-11-29 01:18:29,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=691, Invalid=16339, Unknown=0, NotChecked=0, Total=17030 [2023-11-29 01:18:29,633 INFO L87 Difference]: Start difference. First operand 110 states and 116 transitions. Second operand has 131 states, 131 states have (on average 2.0381679389312977) internal successors, (267), 131 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:18:44,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:18:44,449 INFO L93 Difference]: Finished difference Result 280 states and 299 transitions. [2023-11-29 01:18:44,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2023-11-29 01:18:44,450 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 2.0381679389312977) internal successors, (267), 131 states have internal predecessors, (267), 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 109 [2023-11-29 01:18:44,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:18:44,451 INFO L225 Difference]: With dead ends: 280 [2023-11-29 01:18:44,451 INFO L226 Difference]: Without dead ends: 276 [2023-11-29 01:18:44,452 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8455 ImplicationChecksByTransitivity, 19.8s TimeCoverageRelationStatistics Valid=1849, Invalid=30013, Unknown=0, NotChecked=0, Total=31862 [2023-11-29 01:18:44,452 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 76 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 6955 mSolverCounterSat, 581 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 7536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 581 IncrementalHoareTripleChecker+Valid, 6955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2023-11-29 01:18:44,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 445 Invalid, 7536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [581 Valid, 6955 Invalid, 0 Unknown, 0 Unchecked, 6.9s Time] [2023-11-29 01:18:44,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2023-11-29 01:18:44,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 158. [2023-11-29 01:18:44,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 1.070063694267516) internal successors, (168), 157 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:18:44,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 168 transitions. [2023-11-29 01:18:44,713 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 168 transitions. Word has length 109 [2023-11-29 01:18:44,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:18:44,714 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 168 transitions. [2023-11-29 01:18:44,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 2.0381679389312977) internal successors, (267), 131 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:18:44,714 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 168 transitions. [2023-11-29 01:18:44,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-11-29 01:18:44,715 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:18:44,715 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:18:44,721 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2023-11-29 01:18:44,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-11-29 01:18:44,915 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:18:44,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:18:44,916 INFO L85 PathProgramCache]: Analyzing trace with hash -367306421, now seen corresponding path program 36 times [2023-11-29 01:18:44,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:18:44,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747781038] [2023-11-29 01:18:44,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:18:44,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:18:44,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:18:45,550 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 92 proven. 104 refuted. 0 times theorem prover too weak. 455 trivial. 0 not checked. [2023-11-29 01:18:45,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:18:45,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747781038] [2023-11-29 01:18:45,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747781038] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:18:45,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771863851] [2023-11-29 01:18:45,551 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 01:18:45,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:18:45,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:18:45,552 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:18:45,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-11-29 01:18:46,053 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2023-11-29 01:18:46,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:18:46,060 INFO L262 TraceCheckSpWp]: Trace formula consists of 578 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-29 01:18:46,062 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:18:46,775 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 91 proven. 105 refuted. 0 times theorem prover too weak. 455 trivial. 0 not checked. [2023-11-29 01:18:46,775 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:18:47,439 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 91 proven. 105 refuted. 0 times theorem prover too weak. 455 trivial. 0 not checked. [2023-11-29 01:18:47,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771863851] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:18:47,440 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:18:47,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 74 [2023-11-29 01:18:47,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196722485] [2023-11-29 01:18:47,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:18:47,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2023-11-29 01:18:47,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:18:47,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2023-11-29 01:18:47,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=708, Invalid=4694, Unknown=0, NotChecked=0, Total=5402 [2023-11-29 01:18:47,442 INFO L87 Difference]: Start difference. First operand 158 states and 168 transitions. Second operand has 74 states, 74 states have (on average 1.5) internal successors, (111), 74 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:18:50,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:18:50,229 INFO L93 Difference]: Finished difference Result 426 states and 459 transitions. [2023-11-29 01:18:50,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-11-29 01:18:50,229 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 1.5) internal successors, (111), 74 states have internal predecessors, (111), 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 110 [2023-11-29 01:18:50,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:18:50,231 INFO L225 Difference]: With dead ends: 426 [2023-11-29 01:18:50,231 INFO L226 Difference]: Without dead ends: 208 [2023-11-29 01:18:50,232 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 178 SyntacticMatches, 15 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3957 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1461, Invalid=9459, Unknown=0, NotChecked=0, Total=10920 [2023-11-29 01:18:50,232 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 76 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 3101 mSolverCounterSat, 523 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 3624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 523 IncrementalHoareTripleChecker+Valid, 3101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-29 01:18:50,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 102 Invalid, 3624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [523 Valid, 3101 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-29 01:18:50,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2023-11-29 01:18:50,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 163. [2023-11-29 01:18:50,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 1.0679012345679013) internal successors, (173), 162 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:18:50,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 173 transitions. [2023-11-29 01:18:50,514 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 173 transitions. Word has length 110 [2023-11-29 01:18:50,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:18:50,514 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 173 transitions. [2023-11-29 01:18:50,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 1.5) internal successors, (111), 74 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:18:50,515 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 173 transitions. [2023-11-29 01:18:50,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-11-29 01:18:50,515 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:18:50,515 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:18:50,521 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2023-11-29 01:18:50,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-11-29 01:18:50,716 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:18:50,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:18:50,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1159787658, now seen corresponding path program 37 times [2023-11-29 01:18:50,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:18:50,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548346273] [2023-11-29 01:18:50,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:18:50,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:18:50,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:18:51,342 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 78 proven. 118 refuted. 0 times theorem prover too weak. 469 trivial. 0 not checked. [2023-11-29 01:18:51,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:18:51,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548346273] [2023-11-29 01:18:51,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548346273] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:18:51,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112265409] [2023-11-29 01:18:51,343 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 01:18:51,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:18:51,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:18:51,344 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:18:51,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-11-29 01:18:51,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:18:51,534 INFO L262 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-29 01:18:51,536 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:18:51,806 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 91 proven. 105 refuted. 0 times theorem prover too weak. 469 trivial. 0 not checked. [2023-11-29 01:18:51,806 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:18:52,121 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 91 proven. 105 refuted. 0 times theorem prover too weak. 469 trivial. 0 not checked. [2023-11-29 01:18:52,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112265409] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:18:52,121 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:18:52,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 47 [2023-11-29 01:18:52,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988849325] [2023-11-29 01:18:52,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:18:52,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-11-29 01:18:52,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:18:52,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-11-29 01:18:52,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=513, Invalid=1649, Unknown=0, NotChecked=0, Total=2162 [2023-11-29 01:18:52,122 INFO L87 Difference]: Start difference. First operand 163 states and 173 transitions. Second operand has 47 states, 47 states have (on average 1.4680851063829787) internal successors, (69), 47 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:18:52,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:18:52,780 INFO L93 Difference]: Finished difference Result 232 states and 246 transitions. [2023-11-29 01:18:52,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-29 01:18:52,780 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.4680851063829787) internal successors, (69), 47 states have internal predecessors, (69), 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 111 [2023-11-29 01:18:52,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:18:52,781 INFO L225 Difference]: With dead ends: 232 [2023-11-29 01:18:52,781 INFO L226 Difference]: Without dead ends: 117 [2023-11-29 01:18:52,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 178 SyntacticMatches, 28 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1586 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=530, Invalid=1726, Unknown=0, NotChecked=0, Total=2256 [2023-11-29 01:18:52,782 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 23 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 01:18:52,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 66 Invalid, 705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 01:18:52,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2023-11-29 01:18:53,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2023-11-29 01:18:53,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.0603448275862069) internal successors, (123), 116 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:18:53,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 123 transitions. [2023-11-29 01:18:53,011 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 123 transitions. Word has length 111 [2023-11-29 01:18:53,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:18:53,011 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 123 transitions. [2023-11-29 01:18:53,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.4680851063829787) internal successors, (69), 47 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:18:53,011 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 123 transitions. [2023-11-29 01:18:53,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-11-29 01:18:53,012 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:18:53,012 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:18:53,017 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2023-11-29 01:18:53,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-11-29 01:18:53,212 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:18:53,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:18:53,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1638722976, now seen corresponding path program 38 times [2023-11-29 01:18:53,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:18:53,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178494425] [2023-11-29 01:18:53,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:18:53,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:18:53,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:19:19,228 INFO L134 CoverageAnalysis]: Checked inductivity of 735 backedges. 67 proven. 668 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:19:19,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:19:19,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178494425] [2023-11-29 01:19:19,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178494425] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:19:19,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530592240] [2023-11-29 01:19:19,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 01:19:19,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:19:19,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:19:19,229 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:19:19,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-11-29 01:19:19,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 01:19:19,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:19:19,453 WARN L260 TraceCheckSpWp]: Trace formula consists of 612 conjuncts, 376 conjunts are in the unsatisfiable core [2023-11-29 01:19:19,459 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:19:19,696 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 [2023-11-29 01:19:20,977 INFO L134 CoverageAnalysis]: Checked inductivity of 735 backedges. 0 proven. 735 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:19:20,977 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:19:28,643 INFO L134 CoverageAnalysis]: Checked inductivity of 735 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2023-11-29 01:19:28,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530592240] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:19:28,644 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:19:28,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 48, 33] total 136 [2023-11-29 01:19:28,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397926399] [2023-11-29 01:19:28,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:19:28,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 136 states [2023-11-29 01:19:28,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:19:28,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2023-11-29 01:19:28,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=845, Invalid=17515, Unknown=0, NotChecked=0, Total=18360 [2023-11-29 01:19:28,647 INFO L87 Difference]: Start difference. First operand 117 states and 123 transitions. Second operand has 136 states, 136 states have (on average 2.073529411764706) internal successors, (282), 136 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:19:45,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:19:45,297 INFO L93 Difference]: Finished difference Result 310 states and 329 transitions. [2023-11-29 01:19:45,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2023-11-29 01:19:45,298 INFO L78 Accepts]: Start accepts. Automaton has has 136 states, 136 states have (on average 2.073529411764706) internal successors, (282), 136 states have internal predecessors, (282), 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 116 [2023-11-29 01:19:45,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:19:45,299 INFO L225 Difference]: With dead ends: 310 [2023-11-29 01:19:45,299 INFO L226 Difference]: Without dead ends: 306 [2023-11-29 01:19:45,300 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 205 SyntacticMatches, 2 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8784 ImplicationChecksByTransitivity, 22.9s TimeCoverageRelationStatistics Valid=2307, Invalid=33225, Unknown=0, NotChecked=0, Total=35532 [2023-11-29 01:19:45,300 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 82 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 7457 mSolverCounterSat, 619 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 8076 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 619 IncrementalHoareTripleChecker+Valid, 7457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2023-11-29 01:19:45,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 442 Invalid, 8076 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [619 Valid, 7457 Invalid, 0 Unknown, 0 Unchecked, 7.7s Time] [2023-11-29 01:19:45,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2023-11-29 01:19:45,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 168. [2023-11-29 01:19:45,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.0658682634730539) internal successors, (178), 167 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:19:45,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 178 transitions. [2023-11-29 01:19:45,633 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 178 transitions. Word has length 116 [2023-11-29 01:19:45,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:19:45,633 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 178 transitions. [2023-11-29 01:19:45,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 136 states, 136 states have (on average 2.073529411764706) internal successors, (282), 136 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:19:45,633 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 178 transitions. [2023-11-29 01:19:45,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2023-11-29 01:19:45,634 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:19:45,634 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:19:45,640 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2023-11-29 01:19:45,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2023-11-29 01:19:45,835 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:19:45,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:19:45,837 INFO L85 PathProgramCache]: Analyzing trace with hash -1129076299, now seen corresponding path program 39 times [2023-11-29 01:19:45,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:19:45,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598124798] [2023-11-29 01:19:45,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:19:45,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:19:45,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:19:46,577 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 106 proven. 119 refuted. 0 times theorem prover too weak. 525 trivial. 0 not checked. [2023-11-29 01:19:46,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:19:46,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598124798] [2023-11-29 01:19:46,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598124798] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:19:46,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409580565] [2023-11-29 01:19:46,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 01:19:46,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:19:46,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:19:46,579 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:19:46,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-11-29 01:19:47,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-11-29 01:19:47,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:19:47,081 INFO L262 TraceCheckSpWp]: Trace formula consists of 617 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-29 01:19:47,083 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:19:47,555 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 525 trivial. 0 not checked. [2023-11-29 01:19:47,555 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:19:47,918 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 525 trivial. 0 not checked. [2023-11-29 01:19:47,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409580565] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:19:47,918 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:19:47,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 50 [2023-11-29 01:19:47,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613994843] [2023-11-29 01:19:47,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:19:47,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-11-29 01:19:47,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:19:47,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-11-29 01:19:47,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=565, Invalid=1885, Unknown=0, NotChecked=0, Total=2450 [2023-11-29 01:19:47,920 INFO L87 Difference]: Start difference. First operand 168 states and 178 transitions. Second operand has 50 states, 50 states have (on average 1.44) internal successors, (72), 50 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:19:49,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:19:49,264 INFO L93 Difference]: Finished difference Result 401 states and 426 transitions. [2023-11-29 01:19:49,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-29 01:19:49,264 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.44) internal successors, (72), 50 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2023-11-29 01:19:49,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:19:49,265 INFO L225 Difference]: With dead ends: 401 [2023-11-29 01:19:49,265 INFO L226 Difference]: Without dead ends: 169 [2023-11-29 01:19:49,266 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 188 SyntacticMatches, 29 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1554 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=569, Invalid=1981, Unknown=0, NotChecked=0, Total=2550 [2023-11-29 01:19:49,266 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 32 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 764 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 01:19:49,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 47 Invalid, 926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 764 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 01:19:49,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2023-11-29 01:19:49,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2023-11-29 01:19:49,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 1.0654761904761905) internal successors, (179), 168 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:19:49,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 179 transitions. [2023-11-29 01:19:49,753 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 179 transitions. Word has length 117 [2023-11-29 01:19:49,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:19:49,753 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 179 transitions. [2023-11-29 01:19:49,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.44) internal successors, (72), 50 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:19:49,753 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 179 transitions. [2023-11-29 01:19:49,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2023-11-29 01:19:49,754 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:19:49,754 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:19:49,760 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2023-11-29 01:19:49,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:19:49,954 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:19:49,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:19:49,955 INFO L85 PathProgramCache]: Analyzing trace with hash -776860221, now seen corresponding path program 40 times [2023-11-29 01:19:49,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:19:49,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063900622] [2023-11-29 01:19:49,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:19:49,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:19:49,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:19:50,742 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 91 proven. 134 refuted. 0 times theorem prover too weak. 540 trivial. 0 not checked. [2023-11-29 01:19:50,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:19:50,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063900622] [2023-11-29 01:19:50,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063900622] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:19:50,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304354995] [2023-11-29 01:19:50,742 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 01:19:50,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:19:50,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:19:50,743 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:19:50,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-11-29 01:19:50,935 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 01:19:50,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:19:50,937 INFO L262 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-29 01:19:50,940 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:19:51,672 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 540 trivial. 0 not checked. [2023-11-29 01:19:51,673 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:19:52,456 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 540 trivial. 0 not checked. [2023-11-29 01:19:52,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304354995] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:19:52,456 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:19:52,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 79 [2023-11-29 01:19:52,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932163745] [2023-11-29 01:19:52,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:19:52,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2023-11-29 01:19:52,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:19:52,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2023-11-29 01:19:52,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=817, Invalid=5345, Unknown=0, NotChecked=0, Total=6162 [2023-11-29 01:19:52,459 INFO L87 Difference]: Start difference. First operand 169 states and 179 transitions. Second operand has 79 states, 79 states have (on average 1.3037974683544304) internal successors, (103), 79 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:19:53,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:19:53,748 INFO L93 Difference]: Finished difference Result 259 states and 279 transitions. [2023-11-29 01:19:53,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-29 01:19:53,749 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 1.3037974683544304) internal successors, (103), 79 states have internal predecessors, (103), 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 [2023-11-29 01:19:53,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:19:53,749 INFO L225 Difference]: With dead ends: 259 [2023-11-29 01:19:53,749 INFO L226 Difference]: Without dead ends: 124 [2023-11-29 01:19:53,751 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 174 SyntacticMatches, 16 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3413 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1209, Invalid=7721, Unknown=0, NotChecked=0, Total=8930 [2023-11-29 01:19:53,751 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 117 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 752 mSolverCounterSat, 368 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 1120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 368 IncrementalHoareTripleChecker+Valid, 752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 01:19:53,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 87 Invalid, 1120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [368 Valid, 752 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 01:19:53,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2023-11-29 01:19:54,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2023-11-29 01:19:54,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.056910569105691) internal successors, (130), 123 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:19:54,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 130 transitions. [2023-11-29 01:19:54,061 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 130 transitions. Word has length 118 [2023-11-29 01:19:54,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:19:54,062 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 130 transitions. [2023-11-29 01:19:54,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 1.3037974683544304) internal successors, (103), 79 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:19:54,062 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 130 transitions. [2023-11-29 01:19:54,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-11-29 01:19:54,063 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:19:54,063 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:19:54,068 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2023-11-29 01:19:54,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:19:54,263 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:19:54,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:19:54,264 INFO L85 PathProgramCache]: Analyzing trace with hash -740834422, now seen corresponding path program 41 times [2023-11-29 01:19:54,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:19:54,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337575756] [2023-11-29 01:19:54,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:19:54,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:19:54,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:20:30,636 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 99 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:20:30,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:20:30,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337575756] [2023-11-29 01:20:30,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337575756] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:20:30,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030603838] [2023-11-29 01:20:30,636 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 01:20:30,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:20:30,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:20:30,637 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:20:30,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-11-29 01:20:31,382 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2023-11-29 01:20:31,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:20:31,393 WARN L260 TraceCheckSpWp]: Trace formula consists of 651 conjuncts, 402 conjunts are in the unsatisfiable core [2023-11-29 01:20:31,398 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:20:32,194 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 [2023-11-29 01:20:33,953 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 0 proven. 840 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:20:33,953 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:20:44,192 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 0 proven. 720 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-11-29 01:20:44,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030603838] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:20:44,192 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:20:44,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 51, 35] total 153 [2023-11-29 01:20:44,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598701392] [2023-11-29 01:20:44,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:20:44,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 153 states [2023-11-29 01:20:44,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:20:44,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 153 interpolants. [2023-11-29 01:20:44,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=801, Invalid=22455, Unknown=0, NotChecked=0, Total=23256 [2023-11-29 01:20:44,195 INFO L87 Difference]: Start difference. First operand 124 states and 130 transitions. Second operand has 153 states, 153 states have (on average 2.0) internal successors, (306), 153 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:21:11,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:21:11,610 INFO L93 Difference]: Finished difference Result 328 states and 347 transitions. [2023-11-29 01:21:11,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2023-11-29 01:21:11,611 INFO L78 Accepts]: Start accepts. Automaton has has 153 states, 153 states have (on average 2.0) internal successors, (306), 153 states have internal predecessors, (306), 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 123 [2023-11-29 01:21:11,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:21:11,613 INFO L225 Difference]: With dead ends: 328 [2023-11-29 01:21:11,613 INFO L226 Difference]: Without dead ends: 324 [2023-11-29 01:21:11,615 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 232 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13054 ImplicationChecksByTransitivity, 36.0s TimeCoverageRelationStatistics Valid=3794, Invalid=50728, Unknown=0, NotChecked=0, Total=54522 [2023-11-29 01:21:11,615 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 126 mSDsluCounter, 517 mSDsCounter, 0 mSdLazyCounter, 9299 mSolverCounterSat, 1168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 530 SdHoareTripleChecker+Invalid, 10467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1168 IncrementalHoareTripleChecker+Valid, 9299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:21:11,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 530 Invalid, 10467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1168 Valid, 9299 Invalid, 0 Unknown, 0 Unchecked, 10.2s Time] [2023-11-29 01:21:11,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2023-11-29 01:21:11,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 178. [2023-11-29 01:21:11,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 1.0621468926553672) internal successors, (188), 177 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:21:11,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 188 transitions. [2023-11-29 01:21:11,994 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 188 transitions. Word has length 123 [2023-11-29 01:21:11,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:21:11,994 INFO L495 AbstractCegarLoop]: Abstraction has 178 states and 188 transitions. [2023-11-29 01:21:11,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 153 states, 153 states have (on average 2.0) internal successors, (306), 153 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:21:11,994 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 188 transitions. [2023-11-29 01:21:11,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-11-29 01:21:11,995 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:21:11,995 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:21:12,002 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2023-11-29 01:21:12,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:21:12,195 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:21:12,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:21:12,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1236129845, now seen corresponding path program 42 times [2023-11-29 01:21:12,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:21:12,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517456986] [2023-11-29 01:21:12,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:21:12,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:21:12,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:21:12,913 INFO L134 CoverageAnalysis]: Checked inductivity of 856 backedges. 121 proven. 135 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked. [2023-11-29 01:21:12,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:21:12,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517456986] [2023-11-29 01:21:12,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517456986] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:21:12,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388182573] [2023-11-29 01:21:12,914 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 01:21:12,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:21:12,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:21:12,915 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:21:12,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-11-29 01:21:13,600 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2023-11-29 01:21:13,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:21:13,606 INFO L262 TraceCheckSpWp]: Trace formula consists of 656 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-29 01:21:13,608 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:21:14,090 INFO L134 CoverageAnalysis]: Checked inductivity of 856 backedges. 136 proven. 120 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked. [2023-11-29 01:21:14,090 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:21:14,457 INFO L134 CoverageAnalysis]: Checked inductivity of 856 backedges. 136 proven. 120 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked. [2023-11-29 01:21:14,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388182573] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:21:14,458 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:21:14,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 53 [2023-11-29 01:21:14,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601209296] [2023-11-29 01:21:14,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:21:14,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-11-29 01:21:14,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:21:14,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-11-29 01:21:14,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=634, Invalid=2122, Unknown=0, NotChecked=0, Total=2756 [2023-11-29 01:21:14,460 INFO L87 Difference]: Start difference. First operand 178 states and 188 transitions. Second operand has 53 states, 53 states have (on average 1.4150943396226414) internal successors, (75), 53 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:21:15,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:21:15,679 INFO L93 Difference]: Finished difference Result 425 states and 450 transitions. [2023-11-29 01:21:15,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-29 01:21:15,679 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.4150943396226414) internal successors, (75), 53 states have internal predecessors, (75), 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 124 [2023-11-29 01:21:15,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:21:15,681 INFO L225 Difference]: With dead ends: 425 [2023-11-29 01:21:15,681 INFO L226 Difference]: Without dead ends: 179 [2023-11-29 01:21:15,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 199 SyntacticMatches, 31 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1755 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=638, Invalid=2224, Unknown=0, NotChecked=0, Total=2862 [2023-11-29 01:21:15,682 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 45 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 907 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 1065 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 907 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 01:21:15,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 56 Invalid, 1065 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 907 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 01:21:15,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2023-11-29 01:21:16,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2023-11-29 01:21:16,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 1.0617977528089888) internal successors, (189), 178 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:21:16,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 189 transitions. [2023-11-29 01:21:16,102 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 189 transitions. Word has length 124 [2023-11-29 01:21:16,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:21:16,102 INFO L495 AbstractCegarLoop]: Abstraction has 179 states and 189 transitions. [2023-11-29 01:21:16,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.4150943396226414) internal successors, (75), 53 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:21:16,102 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 189 transitions. [2023-11-29 01:21:16,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-11-29 01:21:16,103 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:21:16,103 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:21:16,109 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2023-11-29 01:21:16,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:21:16,304 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:21:16,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:21:16,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1265350653, now seen corresponding path program 43 times [2023-11-29 01:21:16,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:21:16,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972633872] [2023-11-29 01:21:16,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:21:16,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:21:16,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:21:17,032 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 105 proven. 151 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2023-11-29 01:21:17,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:21:17,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972633872] [2023-11-29 01:21:17,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972633872] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:21:17,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740147404] [2023-11-29 01:21:17,033 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 01:21:17,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:21:17,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:21:17,034 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:21:17,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-11-29 01:21:17,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:21:17,244 INFO L262 TraceCheckSpWp]: Trace formula consists of 665 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-29 01:21:17,246 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:21:17,598 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 120 proven. 136 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2023-11-29 01:21:17,598 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:21:17,995 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 120 proven. 136 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2023-11-29 01:21:17,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740147404] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:21:17,995 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:21:17,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 53 [2023-11-29 01:21:17,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146448356] [2023-11-29 01:21:17,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:21:17,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-11-29 01:21:17,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:21:17,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-11-29 01:21:17,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=649, Invalid=2107, Unknown=0, NotChecked=0, Total=2756 [2023-11-29 01:21:17,997 INFO L87 Difference]: Start difference. First operand 179 states and 189 transitions. Second operand has 53 states, 53 states have (on average 1.4150943396226414) internal successors, (75), 53 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:21:18,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:21:18,685 INFO L93 Difference]: Finished difference Result 274 states and 294 transitions. [2023-11-29 01:21:18,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-29 01:21:18,686 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.4150943396226414) internal successors, (75), 53 states have internal predecessors, (75), 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 125 [2023-11-29 01:21:18,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:21:18,687 INFO L225 Difference]: With dead ends: 274 [2023-11-29 01:21:18,687 INFO L226 Difference]: Without dead ends: 131 [2023-11-29 01:21:18,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 200 SyntacticMatches, 32 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2055 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=668, Invalid=2194, Unknown=0, NotChecked=0, Total=2862 [2023-11-29 01:21:18,688 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 33 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 245 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 245 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 01:21:18,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 41 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [245 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 01:21:18,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2023-11-29 01:21:18,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2023-11-29 01:21:18,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.0538461538461539) internal successors, (137), 130 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:21:18,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 137 transitions. [2023-11-29 01:21:18,969 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 137 transitions. Word has length 125 [2023-11-29 01:21:18,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:21:18,970 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 137 transitions. [2023-11-29 01:21:18,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.4150943396226414) internal successors, (75), 53 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:21:18,970 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 137 transitions. [2023-11-29 01:21:18,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-11-29 01:21:18,970 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:21:18,970 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:21:18,975 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2023-11-29 01:21:19,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:21:19,171 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:21:19,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:21:19,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1142278368, now seen corresponding path program 44 times [2023-11-29 01:21:19,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:21:19,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326697131] [2023-11-29 01:21:19,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:21:19,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:21:19,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:22:00,058 INFO L134 CoverageAnalysis]: Checked inductivity of 952 backedges. 97 proven. 855 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:22:00,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:22:00,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326697131] [2023-11-29 01:22:00,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326697131] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:22:00,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27667496] [2023-11-29 01:22:00,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 01:22:00,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:22:00,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:22:00,060 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:22:00,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-11-29 01:22:00,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 01:22:00,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:22:00,306 WARN L260 TraceCheckSpWp]: Trace formula consists of 690 conjuncts, 428 conjunts are in the unsatisfiable core [2023-11-29 01:22:00,312 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:22:00,852 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 [2023-11-29 01:22:02,267 INFO L134 CoverageAnalysis]: Checked inductivity of 952 backedges. 0 proven. 952 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:22:02,267 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:22:14,096 INFO L134 CoverageAnalysis]: Checked inductivity of 952 backedges. 0 proven. 816 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2023-11-29 01:22:14,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27667496] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:22:14,096 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:22:14,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [116, 54, 37] total 156 [2023-11-29 01:22:14,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939563473] [2023-11-29 01:22:14,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:22:14,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 156 states [2023-11-29 01:22:14,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:22:14,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2023-11-29 01:22:14,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=23360, Unknown=0, NotChecked=0, Total=24180 [2023-11-29 01:22:14,099 INFO L87 Difference]: Start difference. First operand 131 states and 137 transitions. Second operand has 156 states, 156 states have (on average 2.032051282051282) internal successors, (317), 156 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:22:44,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:22:44,493 INFO L93 Difference]: Finished difference Result 346 states and 365 transitions. [2023-11-29 01:22:44,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2023-11-29 01:22:44,494 INFO L78 Accepts]: Start accepts. Automaton has has 156 states, 156 states have (on average 2.032051282051282) internal successors, (317), 156 states have internal predecessors, (317), 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 130 [2023-11-29 01:22:44,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:22:44,495 INFO L225 Difference]: With dead ends: 346 [2023-11-29 01:22:44,495 INFO L226 Difference]: Without dead ends: 342 [2023-11-29 01:22:44,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 240 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12719 ImplicationChecksByTransitivity, 41.4s TimeCoverageRelationStatistics Valid=4187, Invalid=54135, Unknown=0, NotChecked=0, Total=58322 [2023-11-29 01:22:44,498 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 48 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 10293 mSolverCounterSat, 1000 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 569 SdHoareTripleChecker+Invalid, 11293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1000 IncrementalHoareTripleChecker+Valid, 10293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.7s IncrementalHoareTripleChecker+Time [2023-11-29 01:22:44,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 569 Invalid, 11293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1000 Valid, 10293 Invalid, 0 Unknown, 0 Unchecked, 10.7s Time] [2023-11-29 01:22:44,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2023-11-29 01:22:44,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 188. [2023-11-29 01:22:44,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 1.0588235294117647) internal successors, (198), 187 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:22:44,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 198 transitions. [2023-11-29 01:22:44,946 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 198 transitions. Word has length 130 [2023-11-29 01:22:44,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:22:44,946 INFO L495 AbstractCegarLoop]: Abstraction has 188 states and 198 transitions. [2023-11-29 01:22:44,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 156 states, 156 states have (on average 2.032051282051282) internal successors, (317), 156 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:22:44,946 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 198 transitions. [2023-11-29 01:22:44,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-11-29 01:22:44,947 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:22:44,947 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:22:44,953 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2023-11-29 01:22:45,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-11-29 01:22:45,148 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:22:45,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:22:45,148 INFO L85 PathProgramCache]: Analyzing trace with hash -171780811, now seen corresponding path program 45 times [2023-11-29 01:22:45,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:22:45,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596841294] [2023-11-29 01:22:45,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:22:45,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:22:45,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:22:45,905 INFO L134 CoverageAnalysis]: Checked inductivity of 969 backedges. 137 proven. 152 refuted. 0 times theorem prover too weak. 680 trivial. 0 not checked. [2023-11-29 01:22:45,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:22:45,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596841294] [2023-11-29 01:22:45,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596841294] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:22:45,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745165332] [2023-11-29 01:22:45,905 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 01:22:45,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:22:45,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:22:45,906 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:22:45,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-11-29 01:22:46,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2023-11-29 01:22:46,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:22:46,632 INFO L262 TraceCheckSpWp]: Trace formula consists of 695 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-29 01:22:46,634 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:22:47,583 INFO L134 CoverageAnalysis]: Checked inductivity of 969 backedges. 136 proven. 153 refuted. 0 times theorem prover too weak. 680 trivial. 0 not checked. [2023-11-29 01:22:47,583 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:22:48,509 INFO L134 CoverageAnalysis]: Checked inductivity of 969 backedges. 136 proven. 153 refuted. 0 times theorem prover too weak. 680 trivial. 0 not checked. [2023-11-29 01:22:48,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745165332] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:22:48,509 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:22:48,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 89 [2023-11-29 01:22:48,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230246760] [2023-11-29 01:22:48,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:22:48,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2023-11-29 01:22:48,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:22:48,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2023-11-29 01:22:48,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1011, Invalid=6821, Unknown=0, NotChecked=0, Total=7832 [2023-11-29 01:22:48,511 INFO L87 Difference]: Start difference. First operand 188 states and 198 transitions. Second operand has 89 states, 89 states have (on average 1.3146067415730338) internal successors, (117), 89 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:22:52,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:22:52,062 INFO L93 Difference]: Finished difference Result 507 states and 540 transitions. [2023-11-29 01:22:52,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2023-11-29 01:22:52,063 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 1.3146067415730338) internal successors, (117), 89 states have internal predecessors, (117), 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 131 [2023-11-29 01:22:52,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:22:52,064 INFO L225 Difference]: With dead ends: 507 [2023-11-29 01:22:52,064 INFO L226 Difference]: Without dead ends: 247 [2023-11-29 01:22:52,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 211 SyntacticMatches, 18 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5826 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2076, Invalid=13674, Unknown=0, NotChecked=0, Total=15750 [2023-11-29 01:22:52,066 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 165 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 3438 mSolverCounterSat, 613 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 4051 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 613 IncrementalHoareTripleChecker+Valid, 3438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-29 01:22:52,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 98 Invalid, 4051 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [613 Valid, 3438 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-29 01:22:52,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2023-11-29 01:22:52,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 193. [2023-11-29 01:22:52,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 1.0572916666666667) internal successors, (203), 192 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:22:52,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 203 transitions. [2023-11-29 01:22:52,503 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 203 transitions. Word has length 131 [2023-11-29 01:22:52,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:22:52,503 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 203 transitions. [2023-11-29 01:22:52,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 1.3146067415730338) internal successors, (117), 89 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:22:52,504 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 203 transitions. [2023-11-29 01:22:52,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-11-29 01:22:52,504 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:22:52,504 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:22:52,513 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2023-11-29 01:22:52,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:22:52,705 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:22:52,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:22:52,705 INFO L85 PathProgramCache]: Analyzing trace with hash -489378564, now seen corresponding path program 46 times [2023-11-29 01:22:52,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:22:52,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305163190] [2023-11-29 01:22:52,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:22:52,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:22:52,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:22:53,538 INFO L134 CoverageAnalysis]: Checked inductivity of 986 backedges. 120 proven. 169 refuted. 0 times theorem prover too weak. 697 trivial. 0 not checked. [2023-11-29 01:22:53,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:22:53,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305163190] [2023-11-29 01:22:53,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305163190] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:22:53,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201495739] [2023-11-29 01:22:53,539 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 01:22:53,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:22:53,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:22:53,540 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:22:53,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-11-29 01:22:53,755 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 01:22:53,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:22:53,758 INFO L262 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-29 01:22:53,761 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:22:54,784 INFO L134 CoverageAnalysis]: Checked inductivity of 986 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 697 trivial. 0 not checked. [2023-11-29 01:22:54,784 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:22:55,826 INFO L134 CoverageAnalysis]: Checked inductivity of 986 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 697 trivial. 0 not checked. [2023-11-29 01:22:55,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201495739] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:22:55,826 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:22:55,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 89 [2023-11-29 01:22:55,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107963717] [2023-11-29 01:22:55,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:22:55,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2023-11-29 01:22:55,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:22:55,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2023-11-29 01:22:55,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1027, Invalid=6805, Unknown=0, NotChecked=0, Total=7832 [2023-11-29 01:22:55,828 INFO L87 Difference]: Start difference. First operand 193 states and 203 transitions. Second operand has 89 states, 89 states have (on average 1.404494382022472) internal successors, (125), 89 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:22:57,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:22:57,083 INFO L93 Difference]: Finished difference Result 274 states and 288 transitions. [2023-11-29 01:22:57,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-11-29 01:22:57,083 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 1.404494382022472) internal successors, (125), 89 states have internal predecessors, (125), 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 132 [2023-11-29 01:22:57,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:22:57,084 INFO L225 Difference]: With dead ends: 274 [2023-11-29 01:22:57,084 INFO L226 Difference]: Without dead ends: 138 [2023-11-29 01:22:57,085 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 194 SyntacticMatches, 18 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4396 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1522, Invalid=9820, Unknown=0, NotChecked=0, Total=11342 [2023-11-29 01:22:57,086 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 136 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 678 mSolverCounterSat, 435 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 1113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 435 IncrementalHoareTripleChecker+Valid, 678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 01:22:57,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 59 Invalid, 1113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [435 Valid, 678 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 01:22:57,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2023-11-29 01:22:57,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2023-11-29 01:22:57,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 1.051094890510949) internal successors, (144), 137 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:22:57,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 144 transitions. [2023-11-29 01:22:57,430 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 144 transitions. Word has length 132 [2023-11-29 01:22:57,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:22:57,430 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 144 transitions. [2023-11-29 01:22:57,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 1.404494382022472) internal successors, (125), 89 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:22:57,430 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 144 transitions. [2023-11-29 01:22:57,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-11-29 01:22:57,431 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:22:57,431 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:22:57,436 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2023-11-29 01:22:57,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:22:57,632 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:22:57,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:22:57,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1325212938, now seen corresponding path program 47 times [2023-11-29 01:22:57,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:22:57,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523176770] [2023-11-29 01:22:57,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:22:57,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:22:58,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:23:41,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1071 backedges. 91 proven. 980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:23:41,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:23:41,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523176770] [2023-11-29 01:23:41,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523176770] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:23:41,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059694837] [2023-11-29 01:23:41,452 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 01:23:41,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:23:41,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:23:41,453 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:23:41,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_337a2c0d-6d18-4819-bac1-35cc4edab912/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-11-29 01:23:42,081 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2023-11-29 01:23:42,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:23:42,093 WARN L260 TraceCheckSpWp]: Trace formula consists of 729 conjuncts, 456 conjunts are in the unsatisfiable core [2023-11-29 01:23:42,099 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:23:42,388 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 [2023-11-29 01:23:42,498 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 [2023-11-29 01:23:43,930 INFO L134 CoverageAnalysis]: Checked inductivity of 1071 backedges. 0 proven. 1071 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:23:43,930 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:23:56,755 INFO L134 CoverageAnalysis]: Checked inductivity of 1071 backedges. 0 proven. 918 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2023-11-29 01:23:56,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059694837] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:23:56,756 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:23:56,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [124, 57, 39] total 165 [2023-11-29 01:23:56,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378783377] [2023-11-29 01:23:56,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:23:56,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 165 states [2023-11-29 01:23:56,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:23:56,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 165 interpolants. [2023-11-29 01:23:56,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1192, Invalid=25868, Unknown=0, NotChecked=0, Total=27060 [2023-11-29 01:23:56,760 INFO L87 Difference]: Start difference. First operand 138 states and 144 transitions. Second operand has 165 states, 165 states have (on average 2.018181818181818) internal successors, (333), 165 states have internal predecessors, (333), 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)