./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-crafted/zero_sum_const_m4.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/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_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-crafted/zero_sum_const_m4.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/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_5523a4c0-0469-4f42-ad24-35780e06262c/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 aec2f9127d2f09ac657db5f4ff454a031f6027c12ee4edfdaac8d9dd392f7955 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-28 20:36:00,953 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-28 20:36:01,017 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-28 20:36:01,021 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-28 20:36:01,021 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-28 20:36:01,044 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-28 20:36:01,045 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-28 20:36:01,045 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-28 20:36:01,046 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-28 20:36:01,047 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-28 20:36:01,047 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-28 20:36:01,048 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-28 20:36:01,049 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-28 20:36:01,049 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-28 20:36:01,050 INFO L153 SettingsManager]: * Use SBE=true [2023-11-28 20:36:01,050 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-28 20:36:01,051 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-28 20:36:01,051 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-28 20:36:01,052 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-28 20:36:01,052 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-28 20:36:01,053 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-28 20:36:01,056 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-28 20:36:01,057 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-28 20:36:01,057 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-28 20:36:01,058 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-28 20:36:01,058 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-28 20:36:01,058 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-28 20:36:01,059 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-28 20:36:01,059 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-28 20:36:01,060 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-28 20:36:01,060 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-28 20:36:01,060 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-28 20:36:01,061 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-28 20:36:01,061 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-28 20:36:01,061 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-28 20:36:01,062 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-28 20:36:01,062 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-28 20:36:01,062 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-28 20:36:01,062 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-28 20:36:01,063 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-28 20:36:01,063 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-28 20:36:01,063 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-28 20:36:01,063 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_5523a4c0-0469-4f42-ad24-35780e06262c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> aec2f9127d2f09ac657db5f4ff454a031f6027c12ee4edfdaac8d9dd392f7955 [2023-11-28 20:36:01,289 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-28 20:36:01,316 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-28 20:36:01,318 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-28 20:36:01,319 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-28 20:36:01,320 INFO L274 PluginConnector]: CDTParser initialized [2023-11-28 20:36:01,321 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/array-crafted/zero_sum_const_m4.c [2023-11-28 20:36:04,151 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-28 20:36:04,312 INFO L384 CDTParser]: Found 1 translation units. [2023-11-28 20:36:04,313 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/sv-benchmarks/c/array-crafted/zero_sum_const_m4.c [2023-11-28 20:36:04,319 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/data/6dcc74217/fa9c3fae016648d88e64a1d8e384f4db/FLAGde2ea14e4 [2023-11-28 20:36:04,331 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/data/6dcc74217/fa9c3fae016648d88e64a1d8e384f4db [2023-11-28 20:36:04,333 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-28 20:36:04,335 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-28 20:36:04,336 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-28 20:36:04,336 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-28 20:36:04,340 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-28 20:36:04,341 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:36:04" (1/1) ... [2023-11-28 20:36:04,342 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@264f8a29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:36:04, skipping insertion in model container [2023-11-28 20:36:04,342 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:36:04" (1/1) ... [2023-11-28 20:36:04,365 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-28 20:36:04,507 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_5523a4c0-0469-4f42-ad24-35780e06262c/sv-benchmarks/c/array-crafted/zero_sum_const_m4.c[408,421] [2023-11-28 20:36:04,529 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 20:36:04,540 INFO L202 MainTranslator]: Completed pre-run [2023-11-28 20:36:04,554 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_5523a4c0-0469-4f42-ad24-35780e06262c/sv-benchmarks/c/array-crafted/zero_sum_const_m4.c[408,421] [2023-11-28 20:36:04,565 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 20:36:04,581 INFO L206 MainTranslator]: Completed translation [2023-11-28 20:36:04,581 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:36:04 WrapperNode [2023-11-28 20:36:04,581 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-28 20:36:04,582 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-28 20:36:04,583 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-28 20:36:04,583 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-28 20:36:04,591 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:36:04" (1/1) ... [2023-11-28 20:36:04,598 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:36:04" (1/1) ... [2023-11-28 20:36:04,622 INFO L138 Inliner]: procedures = 16, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 127 [2023-11-28 20:36:04,623 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-28 20:36:04,623 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-28 20:36:04,624 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-28 20:36:04,624 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-28 20:36:04,637 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:36:04" (1/1) ... [2023-11-28 20:36:04,637 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:36:04" (1/1) ... [2023-11-28 20:36:04,640 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:36:04" (1/1) ... [2023-11-28 20:36:04,656 INFO L175 MemorySlicer]: Split 11 memory accesses to 2 slices as follows [2, 9]. 82 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]. [2023-11-28 20:36:04,656 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:36:04" (1/1) ... [2023-11-28 20:36:04,656 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:36:04" (1/1) ... [2023-11-28 20:36:04,662 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:36:04" (1/1) ... [2023-11-28 20:36:04,667 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:36:04" (1/1) ... [2023-11-28 20:36:04,668 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:36:04" (1/1) ... [2023-11-28 20:36:04,670 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:36:04" (1/1) ... [2023-11-28 20:36:04,672 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-28 20:36:04,673 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-28 20:36:04,674 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-28 20:36:04,674 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-28 20:36:04,675 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:36:04" (1/1) ... [2023-11-28 20:36:04,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-28 20:36:04,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:36:04,706 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-28 20:36:04,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-28 20:36:04,743 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-28 20:36:04,743 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-28 20:36:04,744 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-28 20:36:04,744 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-28 20:36:04,744 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-28 20:36:04,744 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-28 20:36:04,744 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-28 20:36:04,744 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-28 20:36:04,744 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-28 20:36:04,745 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-28 20:36:04,837 INFO L241 CfgBuilder]: Building ICFG [2023-11-28 20:36:04,840 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-28 20:36:05,043 INFO L282 CfgBuilder]: Performing block encoding [2023-11-28 20:36:05,092 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-28 20:36:05,092 INFO L309 CfgBuilder]: Removed 9 assume(true) statements. [2023-11-28 20:36:05,093 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:36:05 BoogieIcfgContainer [2023-11-28 20:36:05,093 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-28 20:36:05,096 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-28 20:36:05,096 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-28 20:36:05,101 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-28 20:36:05,102 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 08:36:04" (1/3) ... [2023-11-28 20:36:05,102 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7796542e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 08:36:05, skipping insertion in model container [2023-11-28 20:36:05,103 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:36:04" (2/3) ... [2023-11-28 20:36:05,103 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7796542e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 08:36:05, skipping insertion in model container [2023-11-28 20:36:05,103 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:36:05" (3/3) ... [2023-11-28 20:36:05,104 INFO L112 eAbstractionObserver]: Analyzing ICFG zero_sum_const_m4.c [2023-11-28 20:36:05,126 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-28 20:36:05,126 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-28 20:36:05,181 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-28 20:36:05,189 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;@dfacc15, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-28 20:36:05,189 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-28 20:36:05,194 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 24 states have (on average 1.875) internal successors, (45), 25 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) [2023-11-28 20:36:05,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-28 20:36:05,201 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:36:05,202 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] [2023-11-28 20:36:05,203 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:36:05,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:36:05,209 INFO L85 PathProgramCache]: Analyzing trace with hash 1145627675, now seen corresponding path program 1 times [2023-11-28 20:36:05,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:36:05,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905813442] [2023-11-28 20:36:05,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:36:05,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:36:05,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:36:05,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:36:05,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:36:05,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905813442] [2023-11-28 20:36:05,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905813442] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:36:05,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:36:05,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-28 20:36:05,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896115743] [2023-11-28 20:36:05,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:36:05,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-28 20:36:05,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:36:05,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-28 20:36:05,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-28 20:36:05,416 INFO L87 Difference]: Start difference. First operand has 26 states, 24 states have (on average 1.875) internal successors, (45), 25 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) Second operand has 2 states, 2 states have (on average 11.0) internal successors, (22), 2 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:36:05,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:36:05,460 INFO L93 Difference]: Finished difference Result 49 states and 84 transitions. [2023-11-28 20:36:05,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-28 20:36:05,463 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 11.0) internal successors, (22), 2 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-11-28 20:36:05,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:36:05,489 INFO L225 Difference]: With dead ends: 49 [2023-11-28 20:36:05,489 INFO L226 Difference]: Without dead ends: 23 [2023-11-28 20:36:05,492 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 [2023-11-28 20:36:05,496 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 20:36:05,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 20:36:05,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-11-28 20:36:05,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-11-28 20:36:05,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:36:05,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 31 transitions. [2023-11-28 20:36:05,531 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 31 transitions. Word has length 22 [2023-11-28 20:36:05,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:36:05,532 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 31 transitions. [2023-11-28 20:36:05,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 11.0) internal successors, (22), 2 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:36:05,532 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 31 transitions. [2023-11-28 20:36:05,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-28 20:36:05,534 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:36:05,534 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] [2023-11-28 20:36:05,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-28 20:36:05,534 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:36:05,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:36:05,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1559691955, now seen corresponding path program 1 times [2023-11-28 20:36:05,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:36:05,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826907865] [2023-11-28 20:36:05,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:36:05,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:36:05,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:36:05,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:36:05,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:36:05,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826907865] [2023-11-28 20:36:05,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826907865] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:36:05,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:36:05,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 20:36:05,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625887681] [2023-11-28 20:36:05,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:36:05,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:36:05,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:36:05,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:36:05,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:36:05,679 INFO L87 Difference]: Start difference. First operand 23 states and 31 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:36:05,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:36:05,738 INFO L93 Difference]: Finished difference Result 44 states and 60 transitions. [2023-11-28 20:36:05,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:36:05,738 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-11-28 20:36:05,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:36:05,739 INFO L225 Difference]: With dead ends: 44 [2023-11-28 20:36:05,739 INFO L226 Difference]: Without dead ends: 24 [2023-11-28 20:36:05,740 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 [2023-11-28 20:36:05,742 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 20:36:05,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 20:36:05,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-11-28 20:36:05,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-11-28 20:36:05,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 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) [2023-11-28 20:36:05,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 32 transitions. [2023-11-28 20:36:05,749 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 32 transitions. Word has length 22 [2023-11-28 20:36:05,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:36:05,750 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 32 transitions. [2023-11-28 20:36:05,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:36:05,750 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 32 transitions. [2023-11-28 20:36:05,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-28 20:36:05,751 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:36:05,751 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] [2023-11-28 20:36:05,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-28 20:36:05,752 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:36:05,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:36:05,753 INFO L85 PathProgramCache]: Analyzing trace with hash 1137628768, now seen corresponding path program 1 times [2023-11-28 20:36:05,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:36:05,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496639489] [2023-11-28 20:36:05,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:36:05,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:36:05,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:36:05,851 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-28 20:36:05,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:36:05,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496639489] [2023-11-28 20:36:05,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496639489] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:36:05,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:36:05,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-28 20:36:05,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049760394] [2023-11-28 20:36:05,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:36:05,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 20:36:05,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:36:05,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 20:36:05,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-28 20:36:05,855 INFO L87 Difference]: Start difference. First operand 24 states and 32 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:36:05,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:36:05,932 INFO L93 Difference]: Finished difference Result 50 states and 72 transitions. [2023-11-28 20:36:05,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 20:36:05,933 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-11-28 20:36:05,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:36:05,933 INFO L225 Difference]: With dead ends: 50 [2023-11-28 20:36:05,934 INFO L226 Difference]: Without dead ends: 32 [2023-11-28 20:36:05,934 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 [2023-11-28 20:36:05,936 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 27 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-28 20:36:05,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 15 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 20:36:05,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-11-28 20:36:05,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-11-28 20:36:05,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 31 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:36:05,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2023-11-28 20:36:05,945 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 23 [2023-11-28 20:36:05,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:36:05,945 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2023-11-28 20:36:05,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:36:05,946 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2023-11-28 20:36:05,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-28 20:36:05,947 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:36:05,947 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:36:05,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-28 20:36:05,947 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:36:05,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:36:05,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1009747867, now seen corresponding path program 1 times [2023-11-28 20:36:05,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:36:05,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627660108] [2023-11-28 20:36:05,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:36:05,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:36:05,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:36:06,078 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-28 20:36:06,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:36:06,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627660108] [2023-11-28 20:36:06,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627660108] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:36:06,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748753642] [2023-11-28 20:36:06,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:36:06,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:36:06,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:36:06,083 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:36:06,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-28 20:36:06,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:36:06,172 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-28 20:36:06,178 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:36:06,234 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-28 20:36:06,234 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:36:06,262 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-28 20:36:06,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748753642] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:36:06,263 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:36:06,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-28 20:36:06,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344528670] [2023-11-28 20:36:06,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:36:06,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-28 20:36:06,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:36:06,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-28 20:36:06,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2023-11-28 20:36:06,265 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 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) [2023-11-28 20:36:06,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:36:06,329 INFO L93 Difference]: Finished difference Result 61 states and 77 transitions. [2023-11-28 20:36:06,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 20:36:06,330 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 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 31 [2023-11-28 20:36:06,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:36:06,330 INFO L225 Difference]: With dead ends: 61 [2023-11-28 20:36:06,330 INFO L226 Difference]: Without dead ends: 33 [2023-11-28 20:36:06,331 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2023-11-28 20:36:06,332 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-28 20:36:06,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 20:36:06,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-11-28 20:36:06,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2023-11-28 20:36:06,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.28125) internal successors, (41), 32 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:36:06,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2023-11-28 20:36:06,341 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 31 [2023-11-28 20:36:06,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:36:06,341 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2023-11-28 20:36:06,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 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) [2023-11-28 20:36:06,341 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2023-11-28 20:36:06,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-28 20:36:06,342 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:36:06,343 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, 1, 1, 1, 1, 1, 1] [2023-11-28 20:36:06,349 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-28 20:36:06,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:36:06,544 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:36:06,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:36:06,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1256814962, now seen corresponding path program 2 times [2023-11-28 20:36:06,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:36:06,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928768953] [2023-11-28 20:36:06,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:36:06,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:36:06,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:36:06,639 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-28 20:36:06,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:36:06,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928768953] [2023-11-28 20:36:06,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928768953] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:36:06,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24669058] [2023-11-28 20:36:06,640 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-28 20:36:06,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:36:06,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:36:06,642 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:36:06,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-28 20:36:06,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-28 20:36:06,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:36:06,715 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-28 20:36:06,717 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:36:06,773 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-28 20:36:06,773 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:36:06,827 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-28 20:36:06,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24669058] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:36:06,828 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:36:06,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-11-28 20:36:06,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321710892] [2023-11-28 20:36:06,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:36:06,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-28 20:36:06,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:36:06,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-28 20:36:06,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-11-28 20:36:06,830 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 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) [2023-11-28 20:36:06,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:36:06,928 INFO L93 Difference]: Finished difference Result 66 states and 88 transitions. [2023-11-28 20:36:06,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-28 20:36:06,929 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 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 32 [2023-11-28 20:36:06,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:36:06,930 INFO L225 Difference]: With dead ends: 66 [2023-11-28 20:36:06,930 INFO L226 Difference]: Without dead ends: 41 [2023-11-28 20:36:06,931 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 58 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-11-28 20:36:06,932 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 18 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-28 20:36:06,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 18 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 20:36:06,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-11-28 20:36:06,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2023-11-28 20:36:06,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.225) internal successors, (49), 40 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:36:06,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2023-11-28 20:36:06,940 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 32 [2023-11-28 20:36:06,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:36:06,940 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2023-11-28 20:36:06,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 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) [2023-11-28 20:36:06,941 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2023-11-28 20:36:06,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-28 20:36:06,942 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:36:06,942 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:36:06,947 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-28 20:36:07,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:36:07,148 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:36:07,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:36:07,148 INFO L85 PathProgramCache]: Analyzing trace with hash -211220301, now seen corresponding path program 3 times [2023-11-28 20:36:07,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:36:07,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247975065] [2023-11-28 20:36:07,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:36:07,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:36:07,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:36:09,919 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:36:09,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:36:09,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247975065] [2023-11-28 20:36:09,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247975065] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:36:09,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804708141] [2023-11-28 20:36:09,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-28 20:36:09,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:36:09,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:36:09,922 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:36:09,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-28 20:36:10,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-28 20:36:10,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:36:10,006 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 80 conjunts are in the unsatisfiable core [2023-11-28 20:36:10,011 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:36:10,065 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-28 20:36:10,752 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:36:10,752 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:36:11,920 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-28 20:36:11,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804708141] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:36:11,921 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:36:11,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 53 [2023-11-28 20:36:11,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278041286] [2023-11-28 20:36:11,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:36:11,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-11-28 20:36:11,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:36:11,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-11-28 20:36:11,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=2601, Unknown=0, NotChecked=0, Total=2756 [2023-11-28 20:36:11,926 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 53 states, 53 states have (on average 1.7358490566037736) internal successors, (92), 53 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:36:12,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:36:12,909 INFO L93 Difference]: Finished difference Result 74 states and 89 transitions. [2023-11-28 20:36:12,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-28 20:36:12,910 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.7358490566037736) internal successors, (92), 53 states have internal predecessors, (92), 0 states have call successors, (0), 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 [2023-11-28 20:36:12,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:36:12,911 INFO L225 Difference]: With dead ends: 74 [2023-11-28 20:36:12,911 INFO L226 Difference]: Without dead ends: 70 [2023-11-28 20:36:12,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 661 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=161, Invalid=2701, Unknown=0, NotChecked=0, Total=2862 [2023-11-28 20:36:12,915 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 3 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 1294 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 1296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-28 20:36:12,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 214 Invalid, 1296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1294 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-28 20:36:12,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-11-28 20:36:12,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 68. [2023-11-28 20:36:12,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.2388059701492538) internal successors, (83), 67 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:36:12,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 83 transitions. [2023-11-28 20:36:12,933 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 83 transitions. Word has length 40 [2023-11-28 20:36:12,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:36:12,934 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 83 transitions. [2023-11-28 20:36:12,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.7358490566037736) internal successors, (92), 53 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:36:12,935 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 83 transitions. [2023-11-28 20:36:12,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-28 20:36:12,937 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:36:12,937 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:36:12,944 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-28 20:36:13,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-28 20:36:13,143 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:36:13,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:36:13,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1346517450, now seen corresponding path program 4 times [2023-11-28 20:36:13,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:36:13,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014976083] [2023-11-28 20:36:13,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:36:13,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:36:13,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:36:13,279 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-28 20:36:13,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:36:13,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014976083] [2023-11-28 20:36:13,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014976083] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:36:13,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664494442] [2023-11-28 20:36:13,279 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-28 20:36:13,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:36:13,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:36:13,281 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:36:13,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-28 20:36:13,354 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-28 20:36:13,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:36:13,355 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-28 20:36:13,358 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:36:13,428 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-28 20:36:13,429 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:36:13,480 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-28 20:36:13,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664494442] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:36:13,481 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:36:13,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-11-28 20:36:13,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8485635] [2023-11-28 20:36:13,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:36:13,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-28 20:36:13,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:36:13,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-28 20:36:13,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-11-28 20:36:13,483 INFO L87 Difference]: Start difference. First operand 68 states and 83 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:36:13,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:36:13,777 INFO L93 Difference]: Finished difference Result 153 states and 188 transitions. [2023-11-28 20:36:13,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-28 20:36:13,778 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2023-11-28 20:36:13,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:36:13,779 INFO L225 Difference]: With dead ends: 153 [2023-11-28 20:36:13,779 INFO L226 Difference]: Without dead ends: 87 [2023-11-28 20:36:13,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 73 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2023-11-28 20:36:13,781 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 71 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-28 20:36:13,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 35 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-28 20:36:13,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2023-11-28 20:36:13,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 73. [2023-11-28 20:36:13,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.2083333333333333) internal successors, (87), 72 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:36:13,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 87 transitions. [2023-11-28 20:36:13,793 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 87 transitions. Word has length 41 [2023-11-28 20:36:13,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:36:13,793 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 87 transitions. [2023-11-28 20:36:13,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:36:13,794 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 87 transitions. [2023-11-28 20:36:13,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-28 20:36:13,795 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:36:13,795 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:36:13,801 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-28 20:36:14,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:36:14,001 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:36:14,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:36:14,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1370623618, now seen corresponding path program 5 times [2023-11-28 20:36:14,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:36:14,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007017218] [2023-11-28 20:36:14,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:36:14,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:36:14,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:36:14,125 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-28 20:36:14,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:36:14,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007017218] [2023-11-28 20:36:14,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007017218] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:36:14,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663985435] [2023-11-28 20:36:14,126 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-28 20:36:14,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:36:14,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:36:14,129 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:36:14,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-28 20:36:14,248 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-28 20:36:14,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:36:14,250 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-28 20:36:14,252 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:36:14,327 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-28 20:36:14,327 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:36:14,414 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-28 20:36:14,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663985435] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:36:14,414 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:36:14,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-11-28 20:36:14,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525983852] [2023-11-28 20:36:14,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:36:14,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-28 20:36:14,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:36:14,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-28 20:36:14,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-11-28 20:36:14,416 INFO L87 Difference]: Start difference. First operand 73 states and 87 transitions. Second operand has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 14 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:36:14,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:36:14,606 INFO L93 Difference]: Finished difference Result 78 states and 92 transitions. [2023-11-28 20:36:14,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-28 20:36:14,607 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 14 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2023-11-28 20:36:14,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:36:14,607 INFO L225 Difference]: With dead ends: 78 [2023-11-28 20:36:14,608 INFO L226 Difference]: Without dead ends: 50 [2023-11-28 20:36:14,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 74 SyntacticMatches, 6 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2023-11-28 20:36:14,609 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 33 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-28 20:36:14,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 27 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 20:36:14,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-11-28 20:36:14,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2023-11-28 20:36:14,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.183673469387755) internal successors, (58), 49 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:36:14,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2023-11-28 20:36:14,617 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 42 [2023-11-28 20:36:14,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:36:14,617 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2023-11-28 20:36:14,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 14 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:36:14,618 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2023-11-28 20:36:14,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-28 20:36:14,618 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:36:14,619 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1] [2023-11-28 20:36:14,624 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-28 20:36:14,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:36:14,824 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:36:14,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:36:14,825 INFO L85 PathProgramCache]: Analyzing trace with hash 2027067035, now seen corresponding path program 6 times [2023-11-28 20:36:14,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:36:14,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366294285] [2023-11-28 20:36:14,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:36:14,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:36:14,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:36:20,530 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:36:20,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:36:20,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366294285] [2023-11-28 20:36:20,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366294285] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:36:20,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129457991] [2023-11-28 20:36:20,531 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-28 20:36:20,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:36:20,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:36:20,532 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:36:20,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-28 20:36:20,608 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-28 20:36:20,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:36:20,611 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 106 conjunts are in the unsatisfiable core [2023-11-28 20:36:20,615 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:36:22,452 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-28 20:36:22,452 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:36:25,230 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 20:36:25,230 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 [2023-11-28 20:36:25,560 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-28 20:36:25,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129457991] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:36:25,561 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:36:25,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 30, 32] total 96 [2023-11-28 20:36:25,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255794050] [2023-11-28 20:36:25,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:36:25,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2023-11-28 20:36:25,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:36:25,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2023-11-28 20:36:25,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=8817, Unknown=0, NotChecked=0, Total=9120 [2023-11-28 20:36:25,566 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand has 96 states, 96 states have (on average 1.40625) internal successors, (135), 96 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:36:36,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:36:36,839 INFO L93 Difference]: Finished difference Result 152 states and 187 transitions. [2023-11-28 20:36:36,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-11-28 20:36:36,839 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 1.40625) internal successors, (135), 96 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2023-11-28 20:36:36,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:36:36,841 INFO L225 Difference]: With dead ends: 152 [2023-11-28 20:36:36,842 INFO L226 Difference]: Without dead ends: 146 [2023-11-28 20:36:36,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4934 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=1403, Invalid=23403, Unknown=0, NotChecked=0, Total=24806 [2023-11-28 20:36:36,849 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 416 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 6817 mSolverCounterSat, 944 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 416 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 7761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 944 IncrementalHoareTripleChecker+Valid, 6817 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-11-28 20:36:36,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [416 Valid, 348 Invalid, 7761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [944 Valid, 6817 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2023-11-28 20:36:36,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2023-11-28 20:36:36,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 68. [2023-11-28 20:36:36,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.1940298507462686) internal successors, (80), 67 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:36:36,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 80 transitions. [2023-11-28 20:36:36,871 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 80 transitions. Word has length 49 [2023-11-28 20:36:36,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:36:36,872 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 80 transitions. [2023-11-28 20:36:36,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 1.40625) internal successors, (135), 96 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:36:36,872 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 80 transitions. [2023-11-28 20:36:36,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-28 20:36:36,873 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:36:36,873 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 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, 1, 1, 1, 1] [2023-11-28 20:36:36,877 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-28 20:36:37,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:36:37,073 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:36:37,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:36:37,074 INFO L85 PathProgramCache]: Analyzing trace with hash 342585743, now seen corresponding path program 7 times [2023-11-28 20:36:37,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:36:37,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743623108] [2023-11-28 20:36:37,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:36:37,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:36:37,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:36:37,206 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-11-28 20:36:37,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:36:37,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743623108] [2023-11-28 20:36:37,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743623108] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:36:37,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076961143] [2023-11-28 20:36:37,206 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-28 20:36:37,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:36:37,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:36:37,207 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:36:37,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-28 20:36:37,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:36:37,278 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-28 20:36:37,281 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:36:37,354 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-11-28 20:36:37,354 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:36:37,419 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-11-28 20:36:37,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076961143] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:36:37,419 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:36:37,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2023-11-28 20:36:37,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61941692] [2023-11-28 20:36:37,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:36:37,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-28 20:36:37,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:36:37,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-28 20:36:37,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2023-11-28 20:36:37,422 INFO L87 Difference]: Start difference. First operand 68 states and 80 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 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) [2023-11-28 20:36:37,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:36:37,708 INFO L93 Difference]: Finished difference Result 186 states and 222 transitions. [2023-11-28 20:36:37,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-28 20:36:37,708 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 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 50 [2023-11-28 20:36:37,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:36:37,709 INFO L225 Difference]: With dead ends: 186 [2023-11-28 20:36:37,709 INFO L226 Difference]: Without dead ends: 84 [2023-11-28 20:36:37,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 87 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2023-11-28 20:36:37,711 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 71 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-28 20:36:37,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 38 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-28 20:36:37,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2023-11-28 20:36:37,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 73. [2023-11-28 20:36:37,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.1666666666666667) internal successors, (84), 72 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:36:37,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 84 transitions. [2023-11-28 20:36:37,726 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 84 transitions. Word has length 50 [2023-11-28 20:36:37,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:36:37,726 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 84 transitions. [2023-11-28 20:36:37,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 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) [2023-11-28 20:36:37,726 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 84 transitions. [2023-11-28 20:36:37,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-28 20:36:37,727 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:36:37,727 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:36:37,732 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-28 20:36:37,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:36:37,928 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:36:37,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:36:37,929 INFO L85 PathProgramCache]: Analyzing trace with hash -259756042, now seen corresponding path program 8 times [2023-11-28 20:36:37,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:36:37,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401270538] [2023-11-28 20:36:37,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:36:37,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:36:37,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:36:38,078 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-11-28 20:36:38,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:36:38,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401270538] [2023-11-28 20:36:38,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401270538] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:36:38,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140603349] [2023-11-28 20:36:38,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-28 20:36:38,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:36:38,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:36:38,080 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:36:38,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-28 20:36:38,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-28 20:36:38,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:36:38,165 INFO L262 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-28 20:36:38,167 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:36:38,265 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-11-28 20:36:38,266 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:36:38,364 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-11-28 20:36:38,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140603349] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:36:38,364 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:36:38,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2023-11-28 20:36:38,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815013144] [2023-11-28 20:36:38,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:36:38,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-28 20:36:38,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:36:38,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-28 20:36:38,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2023-11-28 20:36:38,366 INFO L87 Difference]: Start difference. First operand 73 states and 84 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 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) [2023-11-28 20:36:38,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:36:38,606 INFO L93 Difference]: Finished difference Result 78 states and 89 transitions. [2023-11-28 20:36:38,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-28 20:36:38,607 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 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 54 [2023-11-28 20:36:38,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:36:38,607 INFO L225 Difference]: With dead ends: 78 [2023-11-28 20:36:38,607 INFO L226 Difference]: Without dead ends: 59 [2023-11-28 20:36:38,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 94 SyntacticMatches, 8 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2023-11-28 20:36:38,608 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 51 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-28 20:36:38,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 18 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-28 20:36:38,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-11-28 20:36:38,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2023-11-28 20:36:38,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.1551724137931034) internal successors, (67), 58 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) [2023-11-28 20:36:38,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions. [2023-11-28 20:36:38,625 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 54 [2023-11-28 20:36:38,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:36:38,625 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 67 transitions. [2023-11-28 20:36:38,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 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) [2023-11-28 20:36:38,626 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions. [2023-11-28 20:36:38,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-11-28 20:36:38,626 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:36:38,626 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 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, 1, 1, 1, 1] [2023-11-28 20:36:38,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-28 20:36:38,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-28 20:36:38,827 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:36:38,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:36:38,827 INFO L85 PathProgramCache]: Analyzing trace with hash 607227571, now seen corresponding path program 9 times [2023-11-28 20:36:38,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:36:38,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346212848] [2023-11-28 20:36:38,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:36:38,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:36:38,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:36:44,672 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 2 proven. 88 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:36:44,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:36:44,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346212848] [2023-11-28 20:36:44,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346212848] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:36:44,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012798024] [2023-11-28 20:36:44,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-28 20:36:44,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:36:44,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:36:44,674 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:36:44,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-28 20:36:44,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-28 20:36:44,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:36:44,759 WARN L260 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 149 conjunts are in the unsatisfiable core [2023-11-28 20:36:44,763 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:36:49,914 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 20:36:49,915 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 [2023-11-28 20:36:50,122 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 4 proven. 80 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-28 20:36:50,123 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:36:57,008 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 20:36:57,009 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 [2023-11-28 20:36:57,351 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-28 20:36:57,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012798024] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:36:57,351 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:36:57,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 47, 45] total 135 [2023-11-28 20:36:57,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221845112] [2023-11-28 20:36:57,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:36:57,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 135 states [2023-11-28 20:36:57,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:36:57,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2023-11-28 20:36:57,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=444, Invalid=17646, Unknown=0, NotChecked=0, Total=18090 [2023-11-28 20:36:57,361 INFO L87 Difference]: Start difference. First operand 59 states and 67 transitions. Second operand has 135 states, 135 states have (on average 1.2148148148148148) internal successors, (164), 135 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:37:26,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:37:26,159 INFO L93 Difference]: Finished difference Result 251 states and 297 transitions. [2023-11-28 20:37:26,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2023-11-28 20:37:26,160 INFO L78 Accepts]: Start accepts. Automaton has has 135 states, 135 states have (on average 1.2148148148148148) internal successors, (164), 135 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2023-11-28 20:37:26,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:37:26,161 INFO L225 Difference]: With dead ends: 251 [2023-11-28 20:37:26,161 INFO L226 Difference]: Without dead ends: 200 [2023-11-28 20:37:26,166 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8361 ImplicationChecksByTransitivity, 33.6s TimeCoverageRelationStatistics Valid=2522, Invalid=44784, Unknown=0, NotChecked=0, Total=47306 [2023-11-28 20:37:26,166 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 289 mSDsluCounter, 728 mSDsCounter, 0 mSdLazyCounter, 9514 mSolverCounterSat, 1443 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 753 SdHoareTripleChecker+Invalid, 10958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1443 IncrementalHoareTripleChecker+Valid, 9514 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.5s IncrementalHoareTripleChecker+Time [2023-11-28 20:37:26,167 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [289 Valid, 753 Invalid, 10958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1443 Valid, 9514 Invalid, 1 Unknown, 0 Unchecked, 8.5s Time] [2023-11-28 20:37:26,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2023-11-28 20:37:26,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 161. [2023-11-28 20:37:26,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.1625) internal successors, (186), 160 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:37:26,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 186 transitions. [2023-11-28 20:37:26,219 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 186 transitions. Word has length 58 [2023-11-28 20:37:26,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:37:26,219 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 186 transitions. [2023-11-28 20:37:26,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 135 states, 135 states have (on average 1.2148148148148148) internal successors, (164), 135 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:37:26,220 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 186 transitions. [2023-11-28 20:37:26,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-11-28 20:37:26,220 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:37:26,221 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 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, 1, 1, 1, 1] [2023-11-28 20:37:26,225 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-28 20:37:26,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-28 20:37:26,421 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:37:26,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:37:26,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1460477103, now seen corresponding path program 10 times [2023-11-28 20:37:26,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:37:26,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726297995] [2023-11-28 20:37:26,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:37:26,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:37:26,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:37:26,563 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-11-28 20:37:26,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:37:26,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726297995] [2023-11-28 20:37:26,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726297995] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:37:26,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194087863] [2023-11-28 20:37:26,564 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-28 20:37:26,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:37:26,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:37:26,565 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:37:26,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-28 20:37:26,658 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-28 20:37:26,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:37:26,660 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-28 20:37:26,663 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:37:26,765 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-11-28 20:37:26,765 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:37:26,854 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-11-28 20:37:26,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194087863] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:37:26,854 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:37:26,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2023-11-28 20:37:26,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727248730] [2023-11-28 20:37:26,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:37:26,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-28 20:37:26,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:37:26,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-28 20:37:26,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2023-11-28 20:37:26,857 INFO L87 Difference]: Start difference. First operand 161 states and 186 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:37:27,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:37:27,312 INFO L93 Difference]: Finished difference Result 239 states and 275 transitions. [2023-11-28 20:37:27,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-28 20:37:27,312 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2023-11-28 20:37:27,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:37:27,313 INFO L225 Difference]: With dead ends: 239 [2023-11-28 20:37:27,313 INFO L226 Difference]: Without dead ends: 68 [2023-11-28 20:37:27,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 103 SyntacticMatches, 9 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2023-11-28 20:37:27,314 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 34 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-28 20:37:27,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 36 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-28 20:37:27,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-11-28 20:37:27,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2023-11-28 20:37:27,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.1343283582089552) internal successors, (76), 67 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:37:27,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 76 transitions. [2023-11-28 20:37:27,347 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 76 transitions. Word has length 59 [2023-11-28 20:37:27,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:37:27,347 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 76 transitions. [2023-11-28 20:37:27,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:37:27,347 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 76 transitions. [2023-11-28 20:37:27,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-11-28 20:37:27,348 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:37:27,348 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 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, 1, 1, 1, 1] [2023-11-28 20:37:27,354 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-28 20:37:27,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-28 20:37:27,549 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:37:27,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:37:27,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1861114469, now seen corresponding path program 11 times [2023-11-28 20:37:27,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:37:27,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539345645] [2023-11-28 20:37:27,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:37:27,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:37:27,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:37:37,456 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 4 proven. 131 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:37:37,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:37:37,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539345645] [2023-11-28 20:37:37,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539345645] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:37:37,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82297875] [2023-11-28 20:37:37,456 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-28 20:37:37,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:37:37,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:37:37,457 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:37:37,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-28 20:37:37,664 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-28 20:37:37,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:37:37,670 WARN L260 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 182 conjunts are in the unsatisfiable core [2023-11-28 20:37:37,674 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:37:37,841 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-28 20:37:42,322 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:37:42,323 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:37:50,815 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-28 20:37:50,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82297875] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:37:50,815 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:37:50,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 51, 48] total 150 [2023-11-28 20:37:50,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438844830] [2023-11-28 20:37:50,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:37:50,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 150 states [2023-11-28 20:37:50,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:37:50,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2023-11-28 20:37:50,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=534, Invalid=21816, Unknown=0, NotChecked=0, Total=22350 [2023-11-28 20:37:50,819 INFO L87 Difference]: Start difference. First operand 68 states and 76 transitions. Second operand has 150 states, 150 states have (on average 1.2466666666666666) internal successors, (187), 150 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:38:14,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:38:14,674 INFO L93 Difference]: Finished difference Result 251 states and 288 transitions. [2023-11-28 20:38:14,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2023-11-28 20:38:14,674 INFO L78 Accepts]: Start accepts. Automaton has has 150 states, 150 states have (on average 1.2466666666666666) internal successors, (187), 150 states have internal predecessors, (187), 0 states have call successors, (0), 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 [2023-11-28 20:38:14,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:38:14,676 INFO L225 Difference]: With dead ends: 251 [2023-11-28 20:38:14,676 INFO L226 Difference]: Without dead ends: 195 [2023-11-28 20:38:14,679 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 238 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13390 ImplicationChecksByTransitivity, 32.5s TimeCoverageRelationStatistics Valid=2144, Invalid=55216, Unknown=0, NotChecked=0, Total=57360 [2023-11-28 20:38:14,680 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 180 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 10092 mSolverCounterSat, 657 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 10749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 657 IncrementalHoareTripleChecker+Valid, 10092 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2023-11-28 20:38:14,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 595 Invalid, 10749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [657 Valid, 10092 Invalid, 0 Unknown, 0 Unchecked, 6.7s Time] [2023-11-28 20:38:14,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2023-11-28 20:38:14,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 131. [2023-11-28 20:38:14,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.1307692307692307) internal successors, (147), 130 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:38:14,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 147 transitions. [2023-11-28 20:38:14,741 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 147 transitions. Word has length 67 [2023-11-28 20:38:14,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:38:14,741 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 147 transitions. [2023-11-28 20:38:14,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 150 states, 150 states have (on average 1.2466666666666666) internal successors, (187), 150 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:38:14,742 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 147 transitions. [2023-11-28 20:38:14,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-28 20:38:14,742 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:38:14,742 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 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, 1, 1, 1, 1] [2023-11-28 20:38:14,747 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-28 20:38:14,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-28 20:38:14,943 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:38:14,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:38:14,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1074864689, now seen corresponding path program 12 times [2023-11-28 20:38:14,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:38:14,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96648452] [2023-11-28 20:38:14,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:38:14,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:38:14,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:38:15,119 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2023-11-28 20:38:15,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:38:15,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96648452] [2023-11-28 20:38:15,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96648452] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:38:15,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892655254] [2023-11-28 20:38:15,119 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-28 20:38:15,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:38:15,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:38:15,120 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:38:15,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-28 20:38:15,224 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-28 20:38:15,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:38:15,226 INFO L262 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-28 20:38:15,227 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:38:15,370 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2023-11-28 20:38:15,370 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:38:15,483 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2023-11-28 20:38:15,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892655254] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:38:15,484 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:38:15,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2023-11-28 20:38:15,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605343545] [2023-11-28 20:38:15,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:38:15,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-28 20:38:15,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:38:15,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-28 20:38:15,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2023-11-28 20:38:15,485 INFO L87 Difference]: Start difference. First operand 131 states and 147 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 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) [2023-11-28 20:38:15,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:38:15,956 INFO L93 Difference]: Finished difference Result 237 states and 268 transitions. [2023-11-28 20:38:15,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-28 20:38:15,956 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 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 [2023-11-28 20:38:15,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:38:15,957 INFO L225 Difference]: With dead ends: 237 [2023-11-28 20:38:15,957 INFO L226 Difference]: Without dead ends: 108 [2023-11-28 20:38:15,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 117 SyntacticMatches, 11 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2023-11-28 20:38:15,958 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 116 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 496 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 496 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-28 20:38:15,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 35 Invalid, 791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [496 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-28 20:38:15,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2023-11-28 20:38:16,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 97. [2023-11-28 20:38:16,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.125) internal successors, (108), 96 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:38:16,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 108 transitions. [2023-11-28 20:38:16,019 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 108 transitions. Word has length 68 [2023-11-28 20:38:16,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:38:16,019 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 108 transitions. [2023-11-28 20:38:16,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 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) [2023-11-28 20:38:16,019 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 108 transitions. [2023-11-28 20:38:16,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-11-28 20:38:16,020 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:38:16,020 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:38:16,025 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-28 20:38:16,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-28 20:38:16,221 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:38:16,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:38:16,221 INFO L85 PathProgramCache]: Analyzing trace with hash 444902326, now seen corresponding path program 13 times [2023-11-28 20:38:16,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:38:16,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937203292] [2023-11-28 20:38:16,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:38:16,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:38:16,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:38:16,397 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2023-11-28 20:38:16,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:38:16,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937203292] [2023-11-28 20:38:16,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937203292] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:38:16,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222757011] [2023-11-28 20:38:16,398 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-28 20:38:16,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:38:16,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:38:16,399 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:38:16,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-28 20:38:16,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:38:16,512 INFO L262 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-28 20:38:16,515 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:38:16,661 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2023-11-28 20:38:16,661 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:38:16,803 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2023-11-28 20:38:16,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222757011] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:38:16,803 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:38:16,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2023-11-28 20:38:16,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664218875] [2023-11-28 20:38:16,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:38:16,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-28 20:38:16,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:38:16,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-28 20:38:16,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2023-11-28 20:38:16,805 INFO L87 Difference]: Start difference. First operand 97 states and 108 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 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) [2023-11-28 20:38:17,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:38:17,149 INFO L93 Difference]: Finished difference Result 102 states and 113 transitions. [2023-11-28 20:38:17,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-28 20:38:17,149 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 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 72 [2023-11-28 20:38:17,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:38:17,150 INFO L225 Difference]: With dead ends: 102 [2023-11-28 20:38:17,150 INFO L226 Difference]: Without dead ends: 77 [2023-11-28 20:38:17,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 124 SyntacticMatches, 12 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=223, Invalid=707, Unknown=0, NotChecked=0, Total=930 [2023-11-28 20:38:17,151 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 57 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 265 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 265 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-28 20:38:17,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 24 Invalid, 616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [265 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-28 20:38:17,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-11-28 20:38:17,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2023-11-28 20:38:17,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.118421052631579) internal successors, (85), 76 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:38:17,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 85 transitions. [2023-11-28 20:38:17,181 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 85 transitions. Word has length 72 [2023-11-28 20:38:17,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:38:17,181 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 85 transitions. [2023-11-28 20:38:17,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 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) [2023-11-28 20:38:17,181 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 85 transitions. [2023-11-28 20:38:17,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-11-28 20:38:17,182 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:38:17,182 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 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, 1, 1, 1, 1] [2023-11-28 20:38:17,186 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-28 20:38:17,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-28 20:38:17,382 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:38:17,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:38:17,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1565037747, now seen corresponding path program 14 times [2023-11-28 20:38:17,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:38:17,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867738474] [2023-11-28 20:38:17,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:38:17,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:38:17,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:38:27,085 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 6 proven. 183 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:38:27,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:38:27,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867738474] [2023-11-28 20:38:27,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867738474] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:38:27,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461038147] [2023-11-28 20:38:27,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-28 20:38:27,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:38:27,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:38:27,087 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:38:27,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-28 20:38:27,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-28 20:38:27,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:38:27,197 WARN L260 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 216 conjunts are in the unsatisfiable core [2023-11-28 20:38:27,203 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:38:27,492 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-28 20:38:33,766 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:38:33,766 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:38:43,199 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 168 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-28 20:38:43,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461038147] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:38:43,199 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:38:43,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 60, 56] total 176 [2023-11-28 20:38:43,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624282351] [2023-11-28 20:38:43,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:38:43,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 176 states [2023-11-28 20:38:43,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:38:43,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 176 interpolants. [2023-11-28 20:38:43,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=726, Invalid=30074, Unknown=0, NotChecked=0, Total=30800 [2023-11-28 20:38:43,203 INFO L87 Difference]: Start difference. First operand 77 states and 85 transitions. Second operand has 176 states, 176 states have (on average 1.2102272727272727) internal successors, (213), 176 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:09,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:39:09,852 INFO L93 Difference]: Finished difference Result 274 states and 311 transitions. [2023-11-28 20:39:09,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2023-11-28 20:39:09,853 INFO L78 Accepts]: Start accepts. Automaton has has 176 states, 176 states have (on average 1.2102272727272727) internal successors, (213), 176 states have internal predecessors, (213), 0 states have call successors, (0), 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 [2023-11-28 20:39:09,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:39:09,854 INFO L225 Difference]: With dead ends: 274 [2023-11-28 20:39:09,854 INFO L226 Difference]: Without dead ends: 211 [2023-11-28 20:39:09,858 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 270 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21555 ImplicationChecksByTransitivity, 36.6s TimeCoverageRelationStatistics Valid=2388, Invalid=71324, Unknown=0, NotChecked=0, Total=73712 [2023-11-28 20:39:09,859 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 156 mSDsluCounter, 548 mSDsCounter, 0 mSdLazyCounter, 11427 mSolverCounterSat, 660 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 573 SdHoareTripleChecker+Invalid, 12087 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 660 IncrementalHoareTripleChecker+Valid, 11427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2023-11-28 20:39:09,859 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 573 Invalid, 12087 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [660 Valid, 11427 Invalid, 0 Unknown, 0 Unchecked, 8.2s Time] [2023-11-28 20:39:09,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2023-11-28 20:39:09,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 148. [2023-11-28 20:39:09,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.1156462585034013) internal successors, (164), 147 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:09,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 164 transitions. [2023-11-28 20:39:09,935 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 164 transitions. Word has length 76 [2023-11-28 20:39:09,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:39:09,935 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 164 transitions. [2023-11-28 20:39:09,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 176 states, 176 states have (on average 1.2102272727272727) internal successors, (213), 176 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:09,936 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 164 transitions. [2023-11-28 20:39:09,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-11-28 20:39:09,936 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:39:09,936 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 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, 1, 1, 1, 1] [2023-11-28 20:39:09,941 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-28 20:39:10,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-28 20:39:10,137 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:39:10,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:39:10,137 INFO L85 PathProgramCache]: Analyzing trace with hash -784489199, now seen corresponding path program 15 times [2023-11-28 20:39:10,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:39:10,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579418293] [2023-11-28 20:39:10,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:39:10,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:39:10,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:39:10,351 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2023-11-28 20:39:10,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:39:10,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579418293] [2023-11-28 20:39:10,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579418293] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:39:10,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713993329] [2023-11-28 20:39:10,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-28 20:39:10,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:39:10,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:39:10,352 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:39:10,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-28 20:39:10,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-11-28 20:39:10,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:39:10,479 INFO L262 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-28 20:39:10,481 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:39:10,634 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2023-11-28 20:39:10,634 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:39:10,774 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2023-11-28 20:39:10,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713993329] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:39:10,775 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:39:10,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2023-11-28 20:39:10,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519797401] [2023-11-28 20:39:10,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:39:10,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-28 20:39:10,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:39:10,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-28 20:39:10,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2023-11-28 20:39:10,776 INFO L87 Difference]: Start difference. First operand 148 states and 164 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:11,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:39:11,317 INFO L93 Difference]: Finished difference Result 266 states and 297 transitions. [2023-11-28 20:39:11,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-28 20:39:11,317 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2023-11-28 20:39:11,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:39:11,318 INFO L225 Difference]: With dead ends: 266 [2023-11-28 20:39:11,318 INFO L226 Difference]: Without dead ends: 120 [2023-11-28 20:39:11,319 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 132 SyntacticMatches, 13 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=270, Invalid=786, Unknown=0, NotChecked=0, Total=1056 [2023-11-28 20:39:11,320 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 109 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 373 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 373 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-28 20:39:11,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 47 Invalid, 862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [373 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-28 20:39:11,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2023-11-28 20:39:11,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 109. [2023-11-28 20:39:11,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.1111111111111112) internal successors, (120), 108 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:11,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 120 transitions. [2023-11-28 20:39:11,381 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 120 transitions. Word has length 77 [2023-11-28 20:39:11,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:39:11,381 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 120 transitions. [2023-11-28 20:39:11,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:11,381 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 120 transitions. [2023-11-28 20:39:11,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-11-28 20:39:11,382 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:39:11,382 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:39:11,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-28 20:39:11,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-28 20:39:11,583 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:39:11,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:39:11,583 INFO L85 PathProgramCache]: Analyzing trace with hash 192919928, now seen corresponding path program 16 times [2023-11-28 20:39:11,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:39:11,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678848524] [2023-11-28 20:39:11,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:39:11,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:39:11,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:39:11,789 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 15 proven. 34 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2023-11-28 20:39:11,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:39:11,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678848524] [2023-11-28 20:39:11,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678848524] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:39:11,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545847464] [2023-11-28 20:39:11,789 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-28 20:39:11,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:39:11,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:39:11,790 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:39:11,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-28 20:39:11,880 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-28 20:39:11,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:39:11,882 INFO L262 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-28 20:39:11,884 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:39:11,994 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2023-11-28 20:39:11,994 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:39:12,109 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2023-11-28 20:39:12,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545847464] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:39:12,109 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:39:12,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2023-11-28 20:39:12,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668603643] [2023-11-28 20:39:12,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:39:12,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-28 20:39:12,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:39:12,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-28 20:39:12,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2023-11-28 20:39:12,110 INFO L87 Difference]: Start difference. First operand 109 states and 120 transitions. Second operand has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 26 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) [2023-11-28 20:39:12,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:39:12,473 INFO L93 Difference]: Finished difference Result 114 states and 125 transitions. [2023-11-28 20:39:12,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-28 20:39:12,473 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 26 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 81 [2023-11-28 20:39:12,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:39:12,474 INFO L225 Difference]: With dead ends: 114 [2023-11-28 20:39:12,474 INFO L226 Difference]: Without dead ends: 86 [2023-11-28 20:39:12,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 140 SyntacticMatches, 14 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 521 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=281, Invalid=909, Unknown=0, NotChecked=0, Total=1190 [2023-11-28 20:39:12,475 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 54 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 313 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 313 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-28 20:39:12,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 27 Invalid, 771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [313 Valid, 458 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-28 20:39:12,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-11-28 20:39:12,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2023-11-28 20:39:12,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.1058823529411765) internal successors, (94), 85 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:39:12,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 94 transitions. [2023-11-28 20:39:12,519 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 94 transitions. Word has length 81 [2023-11-28 20:39:12,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:39:12,520 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 94 transitions. [2023-11-28 20:39:12,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 26 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) [2023-11-28 20:39:12,520 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 94 transitions. [2023-11-28 20:39:12,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-11-28 20:39:12,521 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:39:12,521 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 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, 1, 1, 1, 1] [2023-11-28 20:39:12,526 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-28 20:39:12,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:39:12,721 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:39:12,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:39:12,722 INFO L85 PathProgramCache]: Analyzing trace with hash 1056224411, now seen corresponding path program 17 times [2023-11-28 20:39:12,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:39:12,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901775982] [2023-11-28 20:39:12,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:39:12,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:39:12,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:39:26,026 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 16 proven. 236 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:39:26,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:39:26,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901775982] [2023-11-28 20:39:26,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901775982] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:39:26,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99052091] [2023-11-28 20:39:26,026 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-28 20:39:26,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:39:26,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:39:26,027 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:39:26,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-28 20:39:26,326 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-11-28 20:39:26,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:39:26,333 WARN L260 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 250 conjunts are in the unsatisfiable core [2023-11-28 20:39:26,339 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:39:26,708 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-28 20:39:34,969 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 252 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:39:34,969 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:39:51,854 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 224 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-28 20:39:51,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99052091] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:39:51,854 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:39:51,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 69, 64] total 202 [2023-11-28 20:39:51,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589849243] [2023-11-28 20:39:51,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:39:51,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 202 states [2023-11-28 20:39:51,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:39:51,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 202 interpolants. [2023-11-28 20:39:51,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=757, Invalid=39845, Unknown=0, NotChecked=0, Total=40602 [2023-11-28 20:39:51,858 INFO L87 Difference]: Start difference. First operand 86 states and 94 transitions. Second operand has 202 states, 202 states have (on average 1.183168316831683) internal successors, (239), 202 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:40:26,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:40:26,390 INFO L93 Difference]: Finished difference Result 311 states and 347 transitions. [2023-11-28 20:40:26,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2023-11-28 20:40:26,390 INFO L78 Accepts]: Start accepts. Automaton has has 202 states, 202 states have (on average 1.183168316831683) internal successors, (239), 202 states have internal predecessors, (239), 0 states have call successors, (0), 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 85 [2023-11-28 20:40:26,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:40:26,392 INFO L225 Difference]: With dead ends: 311 [2023-11-28 20:40:26,392 INFO L226 Difference]: Without dead ends: 241 [2023-11-28 20:40:26,394 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 288 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20363 ImplicationChecksByTransitivity, 51.4s TimeCoverageRelationStatistics Valid=2394, Invalid=81416, Unknown=0, NotChecked=0, Total=83810 [2023-11-28 20:40:26,395 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 130 mSDsluCounter, 703 mSDsCounter, 0 mSdLazyCounter, 16069 mSolverCounterSat, 544 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 727 SdHoareTripleChecker+Invalid, 16613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 544 IncrementalHoareTripleChecker+Valid, 16069 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.5s IncrementalHoareTripleChecker+Time [2023-11-28 20:40:26,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 727 Invalid, 16613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [544 Valid, 16069 Invalid, 0 Unknown, 0 Unchecked, 11.5s Time] [2023-11-28 20:40:26,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2023-11-28 20:40:26,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 165. [2023-11-28 20:40:26,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.103658536585366) internal successors, (181), 164 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) [2023-11-28 20:40:26,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 181 transitions. [2023-11-28 20:40:26,491 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 181 transitions. Word has length 85 [2023-11-28 20:40:26,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:40:26,491 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 181 transitions. [2023-11-28 20:40:26,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 202 states, 202 states have (on average 1.183168316831683) internal successors, (239), 202 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:40:26,491 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 181 transitions. [2023-11-28 20:40:26,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-11-28 20:40:26,492 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:40:26,492 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 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, 1, 1, 1, 1] [2023-11-28 20:40:26,498 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-28 20:40:26,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:40:26,692 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:40:26,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:40:26,693 INFO L85 PathProgramCache]: Analyzing trace with hash 821770767, now seen corresponding path program 18 times [2023-11-28 20:40:26,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:40:26,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188802710] [2023-11-28 20:40:26,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:40:26,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:40:26,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:40:26,931 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 29 proven. 35 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2023-11-28 20:40:26,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:40:26,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188802710] [2023-11-28 20:40:26,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188802710] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:40:26,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535176432] [2023-11-28 20:40:26,932 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-28 20:40:26,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:40:26,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:40:26,933 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:40:26,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-28 20:40:27,070 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-11-28 20:40:27,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:40:27,073 INFO L262 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-28 20:40:27,075 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:40:27,224 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2023-11-28 20:40:27,224 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:40:27,357 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2023-11-28 20:40:27,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535176432] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:40:27,357 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:40:27,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2023-11-28 20:40:27,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028350533] [2023-11-28 20:40:27,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:40:27,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-28 20:40:27,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:40:27,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-28 20:40:27,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2023-11-28 20:40:27,358 INFO L87 Difference]: Start difference. First operand 165 states and 181 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 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) [2023-11-28 20:40:27,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:40:27,942 INFO L93 Difference]: Finished difference Result 295 states and 326 transitions. [2023-11-28 20:40:27,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-28 20:40:27,943 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 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 86 [2023-11-28 20:40:27,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:40:27,944 INFO L225 Difference]: With dead ends: 295 [2023-11-28 20:40:27,944 INFO L226 Difference]: Without dead ends: 132 [2023-11-28 20:40:27,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 147 SyntacticMatches, 15 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=335, Invalid=997, Unknown=0, NotChecked=0, Total=1332 [2023-11-28 20:40:27,945 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 115 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 486 mSolverCounterSat, 419 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 419 IncrementalHoareTripleChecker+Valid, 486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-28 20:40:27,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 41 Invalid, 905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [419 Valid, 486 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-28 20:40:27,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2023-11-28 20:40:28,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 121. [2023-11-28 20:40:28,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.1) internal successors, (132), 120 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:40:28,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 132 transitions. [2023-11-28 20:40:28,020 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 132 transitions. Word has length 86 [2023-11-28 20:40:28,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:40:28,020 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 132 transitions. [2023-11-28 20:40:28,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 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) [2023-11-28 20:40:28,021 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 132 transitions. [2023-11-28 20:40:28,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-11-28 20:40:28,021 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:40:28,021 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:40:28,027 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-28 20:40:28,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-28 20:40:28,222 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:40:28,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:40:28,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1053366134, now seen corresponding path program 19 times [2023-11-28 20:40:28,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:40:28,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128777762] [2023-11-28 20:40:28,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:40:28,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:40:28,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:40:28,512 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 21 proven. 43 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2023-11-28 20:40:28,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:40:28,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128777762] [2023-11-28 20:40:28,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128777762] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:40:28,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039991077] [2023-11-28 20:40:28,512 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-28 20:40:28,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:40:28,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:40:28,513 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:40:28,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-28 20:40:28,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:40:28,627 INFO L262 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-28 20:40:28,629 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:40:28,792 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2023-11-28 20:40:28,792 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:40:28,935 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2023-11-28 20:40:28,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039991077] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:40:28,936 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:40:28,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2023-11-28 20:40:28,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681358186] [2023-11-28 20:40:28,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:40:28,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-28 20:40:28,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:40:28,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-28 20:40:28,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2023-11-28 20:40:28,937 INFO L87 Difference]: Start difference. First operand 121 states and 132 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 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) [2023-11-28 20:40:29,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:40:29,372 INFO L93 Difference]: Finished difference Result 126 states and 137 transitions. [2023-11-28 20:40:29,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-28 20:40:29,372 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 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 90 [2023-11-28 20:40:29,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:40:29,373 INFO L225 Difference]: With dead ends: 126 [2023-11-28 20:40:29,373 INFO L226 Difference]: Without dead ends: 95 [2023-11-28 20:40:29,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 154 SyntacticMatches, 16 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=346, Invalid=1136, Unknown=0, NotChecked=0, Total=1482 [2023-11-28 20:40:29,374 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 42 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 318 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 943 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 318 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-28 20:40:29,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 27 Invalid, 943 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [318 Valid, 625 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-28 20:40:29,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-11-28 20:40:29,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2023-11-28 20:40:29,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.0957446808510638) internal successors, (103), 94 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) [2023-11-28 20:40:29,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 103 transitions. [2023-11-28 20:40:29,428 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 103 transitions. Word has length 90 [2023-11-28 20:40:29,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:40:29,428 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 103 transitions. [2023-11-28 20:40:29,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 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) [2023-11-28 20:40:29,429 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 103 transitions. [2023-11-28 20:40:29,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-11-28 20:40:29,429 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:40:29,429 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 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, 1, 1, 1, 1] [2023-11-28 20:40:29,434 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-28 20:40:29,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:40:29,630 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:40:29,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:40:29,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1733944653, now seen corresponding path program 20 times [2023-11-28 20:40:29,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:40:29,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557594832] [2023-11-28 20:40:29,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:40:29,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:40:29,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:40:47,130 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 32 proven. 292 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:40:47,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:40:47,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557594832] [2023-11-28 20:40:47,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557594832] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:40:47,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275445134] [2023-11-28 20:40:47,130 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-28 20:40:47,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:40:47,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:40:47,131 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:40:47,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-28 20:40:47,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-28 20:40:47,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:40:47,253 WARN L260 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 284 conjunts are in the unsatisfiable core [2023-11-28 20:40:47,258 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:40:47,820 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-28 20:40:58,918 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:40:58,918 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:41:20,868 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-28 20:41:20,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275445134] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:41:20,868 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:41:20,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 78, 72] total 228 [2023-11-28 20:41:20,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132714125] [2023-11-28 20:41:20,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:41:20,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 228 states [2023-11-28 20:41:20,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:41:20,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 228 interpolants. [2023-11-28 20:41:20,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=887, Invalid=50869, Unknown=0, NotChecked=0, Total=51756 [2023-11-28 20:41:20,873 INFO L87 Difference]: Start difference. First operand 95 states and 103 transitions. Second operand has 228 states, 228 states have (on average 1.162280701754386) internal successors, (265), 228 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:42:27,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:42:27,946 INFO L93 Difference]: Finished difference Result 277 states and 312 transitions. [2023-11-28 20:42:27,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2023-11-28 20:42:27,946 INFO L78 Accepts]: Start accepts. Automaton has has 228 states, 228 states have (on average 1.162280701754386) internal successors, (265), 228 states have internal predecessors, (265), 0 states have call successors, (0), 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 94 [2023-11-28 20:42:27,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:42:27,948 INFO L225 Difference]: With dead ends: 277 [2023-11-28 20:42:27,948 INFO L226 Difference]: Without dead ends: 271 [2023-11-28 20:42:27,951 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 357 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34054 ImplicationChecksByTransitivity, 83.5s TimeCoverageRelationStatistics Valid=5094, Invalid=123428, Unknown=0, NotChecked=0, Total=128522 [2023-11-28 20:42:27,952 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 655 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 24953 mSolverCounterSat, 2810 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 655 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 27763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2810 IncrementalHoareTripleChecker+Valid, 24953 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.9s IncrementalHoareTripleChecker+Time [2023-11-28 20:42:27,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [655 Valid, 440 Invalid, 27763 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2810 Valid, 24953 Invalid, 0 Unknown, 0 Unchecked, 20.9s Time] [2023-11-28 20:42:27,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2023-11-28 20:42:28,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 128. [2023-11-28 20:42:28,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 1.1023622047244095) internal successors, (140), 127 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:42:28,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 140 transitions. [2023-11-28 20:42:28,050 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 140 transitions. Word has length 94 [2023-11-28 20:42:28,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:42:28,051 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 140 transitions. [2023-11-28 20:42:28,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 228 states, 228 states have (on average 1.162280701754386) internal successors, (265), 228 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:42:28,051 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 140 transitions. [2023-11-28 20:42:28,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-11-28 20:42:28,051 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:42:28,052 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 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, 1, 1, 1, 1] [2023-11-28 20:42:28,057 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-28 20:42:28,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:42:28,252 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:42:28,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:42:28,253 INFO L85 PathProgramCache]: Analyzing trace with hash 2125559505, now seen corresponding path program 21 times [2023-11-28 20:42:28,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:42:28,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038257950] [2023-11-28 20:42:28,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:42:28,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:42:28,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:42:28,549 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 37 proven. 44 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2023-11-28 20:42:28,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:42:28,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038257950] [2023-11-28 20:42:28,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038257950] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:42:28,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161197379] [2023-11-28 20:42:28,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-28 20:42:28,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:42:28,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:42:28,550 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:42:28,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-28 20:42:28,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-11-28 20:42:28,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:42:28,739 INFO L262 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-28 20:42:28,740 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:42:29,012 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 36 proven. 45 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2023-11-28 20:42:29,013 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:42:29,292 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 36 proven. 45 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2023-11-28 20:42:29,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161197379] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:42:29,293 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:42:29,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 49 [2023-11-28 20:42:29,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704240874] [2023-11-28 20:42:29,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:42:29,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-11-28 20:42:29,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:42:29,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-11-28 20:42:29,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=377, Invalid=1975, Unknown=0, NotChecked=0, Total=2352 [2023-11-28 20:42:29,295 INFO L87 Difference]: Start difference. First operand 128 states and 140 transitions. Second operand has 49 states, 49 states have (on average 1.8775510204081634) internal successors, (92), 49 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:42:30,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:42:30,650 INFO L93 Difference]: Finished difference Result 292 states and 327 transitions. [2023-11-28 20:42:30,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-28 20:42:30,651 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.8775510204081634) internal successors, (92), 49 states have internal predecessors, (92), 0 states have call successors, (0), 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 [2023-11-28 20:42:30,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:42:30,652 INFO L225 Difference]: With dead ends: 292 [2023-11-28 20:42:30,652 INFO L226 Difference]: Without dead ends: 104 [2023-11-28 20:42:30,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 171 SyntacticMatches, 10 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2252 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=885, Invalid=4967, Unknown=0, NotChecked=0, Total=5852 [2023-11-28 20:42:30,653 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 176 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 1985 mSolverCounterSat, 975 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 2960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 975 IncrementalHoareTripleChecker+Valid, 1985 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-28 20:42:30,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 63 Invalid, 2960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [975 Valid, 1985 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-28 20:42:30,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2023-11-28 20:42:30,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2023-11-28 20:42:30,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.087378640776699) internal successors, (112), 103 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:42:30,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 112 transitions. [2023-11-28 20:42:30,762 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 112 transitions. Word has length 95 [2023-11-28 20:42:30,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:42:30,762 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 112 transitions. [2023-11-28 20:42:30,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.8775510204081634) internal successors, (92), 49 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:42:30,763 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 112 transitions. [2023-11-28 20:42:30,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-11-28 20:42:30,763 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:42:30,763 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 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, 1, 1, 1, 1] [2023-11-28 20:42:30,768 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-28 20:42:30,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:42:30,964 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:42:30,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:42:30,964 INFO L85 PathProgramCache]: Analyzing trace with hash -796671077, now seen corresponding path program 22 times [2023-11-28 20:42:30,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:42:30,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735295073] [2023-11-28 20:42:30,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:42:30,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:42:31,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:42:53,211 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 57 proven. 348 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:42:53,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:42:53,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735295073] [2023-11-28 20:42:53,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735295073] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:42:53,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613613770] [2023-11-28 20:42:53,212 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-28 20:42:53,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:42:53,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:42:53,213 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:42:53,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-28 20:42:53,381 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-28 20:42:53,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:42:53,388 WARN L260 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 298 conjunts are in the unsatisfiable core [2023-11-28 20:42:53,394 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:43:07,959 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 0 proven. 360 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-28 20:43:07,959 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:43:36,142 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 20:43:36,142 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 18 select indices, 18 select index equivalence classes, 0 disjoint index pairs (out of 153 index pairs), introduced 18 new quantified variables, introduced 153 case distinctions, treesize of input 154 treesize of output 743 [2023-11-28 20:44:05,117 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 0 proven. 360 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-28 20:44:05,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613613770] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:44:05,117 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:44:05,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 78, 80] total 246 [2023-11-28 20:44:05,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270906144] [2023-11-28 20:44:05,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:44:05,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 246 states [2023-11-28 20:44:05,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:44:05,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 246 interpolants. [2023-11-28 20:44:05,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1012, Invalid=59258, Unknown=0, NotChecked=0, Total=60270 [2023-11-28 20:44:05,122 INFO L87 Difference]: Start difference. First operand 104 states and 112 transitions. Second operand has 246 states, 246 states have (on average 1.1585365853658536) internal successors, (285), 246 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:45:28,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:45:28,989 INFO L93 Difference]: Finished difference Result 302 states and 337 transitions. [2023-11-28 20:45:28,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2023-11-28 20:45:28,989 INFO L78 Accepts]: Start accepts. Automaton has has 246 states, 246 states have (on average 1.1585365853658536) internal successors, (285), 246 states have internal predecessors, (285), 0 states have call successors, (0), 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 [2023-11-28 20:45:28,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:45:28,991 INFO L225 Difference]: With dead ends: 302 [2023-11-28 20:45:28,991 INFO L226 Difference]: Without dead ends: 296 [2023-11-28 20:45:29,000 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 445 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 389 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40655 ImplicationChecksByTransitivity, 103.7s TimeCoverageRelationStatistics Valid=6001, Invalid=146489, Unknown=0, NotChecked=0, Total=152490 [2023-11-28 20:45:29,001 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 611 mSDsluCounter, 460 mSDsCounter, 0 mSdLazyCounter, 31989 mSolverCounterSat, 2857 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 611 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 34846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2857 IncrementalHoareTripleChecker+Valid, 31989 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27.1s IncrementalHoareTripleChecker+Time [2023-11-28 20:45:29,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [611 Valid, 484 Invalid, 34846 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2857 Valid, 31989 Invalid, 0 Unknown, 0 Unchecked, 27.1s Time] [2023-11-28 20:45:29,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2023-11-28 20:45:29,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 140. [2023-11-28 20:45:29,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 1.0935251798561152) internal successors, (152), 139 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) [2023-11-28 20:45:29,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 152 transitions. [2023-11-28 20:45:29,198 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 152 transitions. Word has length 103 [2023-11-28 20:45:29,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:45:29,199 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 152 transitions. [2023-11-28 20:45:29,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 246 states, 246 states have (on average 1.1585365853658536) internal successors, (285), 246 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:45:29,199 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 152 transitions. [2023-11-28 20:45:29,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-11-28 20:45:29,200 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:45:29,200 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 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, 1, 1, 1, 1] [2023-11-28 20:45:29,205 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-28 20:45:29,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:45:29,400 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:45:29,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:45:29,401 INFO L85 PathProgramCache]: Analyzing trace with hash -182155697, now seen corresponding path program 23 times [2023-11-28 20:45:29,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:45:29,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697731285] [2023-11-28 20:45:29,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:45:29,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:45:29,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:45:29,733 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 46 proven. 54 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2023-11-28 20:45:29,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:45:29,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697731285] [2023-11-28 20:45:29,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697731285] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:45:29,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495657177] [2023-11-28 20:45:29,734 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-28 20:45:29,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:45:29,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:45:29,735 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:45:29,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-28 20:45:30,146 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-11-28 20:45:30,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:45:30,151 INFO L262 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-28 20:45:30,153 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:45:30,382 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2023-11-28 20:45:30,382 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:45:30,564 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2023-11-28 20:45:30,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495657177] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:45:30,564 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:45:30,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 35 [2023-11-28 20:45:30,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732374165] [2023-11-28 20:45:30,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:45:30,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-28 20:45:30,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:45:30,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-28 20:45:30,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=899, Unknown=0, NotChecked=0, Total=1190 [2023-11-28 20:45:30,566 INFO L87 Difference]: Start difference. First operand 140 states and 152 transitions. Second operand has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 35 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:45:31,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:45:31,475 INFO L93 Difference]: Finished difference Result 366 states and 402 transitions. [2023-11-28 20:45:31,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-28 20:45:31,476 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 35 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2023-11-28 20:45:31,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:45:31,477 INFO L225 Difference]: With dead ends: 366 [2023-11-28 20:45:31,477 INFO L226 Difference]: Without dead ends: 156 [2023-11-28 20:45:31,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 187 SyntacticMatches, 19 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 886 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=486, Invalid=1494, Unknown=0, NotChecked=0, Total=1980 [2023-11-28 20:45:31,478 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 107 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 672 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 1243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 672 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-28 20:45:31,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 44 Invalid, 1243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [672 Valid, 571 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-28 20:45:31,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2023-11-28 20:45:31,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 145. [2023-11-28 20:45:31,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.0833333333333333) internal successors, (156), 144 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:45:31,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 156 transitions. [2023-11-28 20:45:31,608 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 156 transitions. Word has length 104 [2023-11-28 20:45:31,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:45:31,608 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 156 transitions. [2023-11-28 20:45:31,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 35 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:45:31,608 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 156 transitions. [2023-11-28 20:45:31,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-11-28 20:45:31,608 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:45:31,608 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:45:31,615 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-11-28 20:45:31,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:45:31,809 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:45:31,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:45:31,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1107669814, now seen corresponding path program 24 times [2023-11-28 20:45:31,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:45:31,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893260043] [2023-11-28 20:45:31,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:45:31,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:45:31,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:45:32,170 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 36 proven. 64 refuted. 0 times theorem prover too weak. 355 trivial. 0 not checked. [2023-11-28 20:45:32,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:45:32,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893260043] [2023-11-28 20:45:32,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893260043] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:45:32,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92249237] [2023-11-28 20:45:32,171 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-28 20:45:32,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:45:32,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:45:32,172 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:45:32,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-28 20:45:32,388 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2023-11-28 20:45:32,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:45:32,392 INFO L262 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-28 20:45:32,394 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:45:32,586 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 45 proven. 55 refuted. 0 times theorem prover too weak. 355 trivial. 0 not checked. [2023-11-28 20:45:32,586 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:45:32,799 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 45 proven. 55 refuted. 0 times theorem prover too weak. 355 trivial. 0 not checked. [2023-11-28 20:45:32,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92249237] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:45:32,800 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:45:32,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 35 [2023-11-28 20:45:32,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203056129] [2023-11-28 20:45:32,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:45:32,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-28 20:45:32,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:45:32,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-28 20:45:32,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=899, Unknown=0, NotChecked=0, Total=1190 [2023-11-28 20:45:32,802 INFO L87 Difference]: Start difference. First operand 145 states and 156 transitions. Second operand has 35 states, 35 states have (on average 1.8) internal successors, (63), 35 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) [2023-11-28 20:45:33,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:45:33,422 INFO L93 Difference]: Finished difference Result 150 states and 161 transitions. [2023-11-28 20:45:33,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-28 20:45:33,423 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8) internal successors, (63), 35 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 108 [2023-11-28 20:45:33,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:45:33,423 INFO L225 Difference]: With dead ends: 150 [2023-11-28 20:45:33,424 INFO L226 Difference]: Without dead ends: 113 [2023-11-28 20:45:33,424 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 184 SyntacticMatches, 20 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1022 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=497, Invalid=1665, Unknown=0, NotChecked=0, Total=2162 [2023-11-28 20:45:33,425 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 66 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 747 mSolverCounterSat, 484 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 1231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 484 IncrementalHoareTripleChecker+Valid, 747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-28 20:45:33,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 27 Invalid, 1231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [484 Valid, 747 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-28 20:45:33,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2023-11-28 20:45:33,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2023-11-28 20:45:33,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.0803571428571428) internal successors, (121), 112 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:45:33,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 121 transitions. [2023-11-28 20:45:33,544 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 121 transitions. Word has length 108 [2023-11-28 20:45:33,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:45:33,544 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 121 transitions. [2023-11-28 20:45:33,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.8) internal successors, (63), 35 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) [2023-11-28 20:45:33,544 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 121 transitions. [2023-11-28 20:45:33,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-11-28 20:45:33,545 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:45:33,545 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 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, 1, 1, 1, 1] [2023-11-28 20:45:33,550 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-11-28 20:45:33,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:45:33,745 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:45:33,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:45:33,746 INFO L85 PathProgramCache]: Analyzing trace with hash -599646029, now seen corresponding path program 25 times [2023-11-28 20:45:33,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:45:33,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828087654] [2023-11-28 20:45:33,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:45:33,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:45:34,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:46:02,576 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 42 proven. 453 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:46:02,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:46:02,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828087654] [2023-11-28 20:46:02,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828087654] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:46:02,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586094415] [2023-11-28 20:46:02,577 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-28 20:46:02,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:46:02,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:46:02,578 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:46:02,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-28 20:46:02,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:46:02,725 WARN L260 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 352 conjunts are in the unsatisfiable core [2023-11-28 20:46:02,731 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:46:03,744 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-28 20:46:22,605 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:46:22,605 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:47:04,287 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 440 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-28 20:47:04,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586094415] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:47:04,288 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:47:04,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 96, 88] total 280 [2023-11-28 20:47:04,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035826377] [2023-11-28 20:47:04,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:47:04,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 280 states [2023-11-28 20:47:04,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:47:04,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 280 interpolants. [2023-11-28 20:47:04,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1091, Invalid=77029, Unknown=0, NotChecked=0, Total=78120 [2023-11-28 20:47:04,297 INFO L87 Difference]: Start difference. First operand 113 states and 121 transitions. Second operand has 280 states, 280 states have (on average 1.1321428571428571) internal successors, (317), 280 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) [2023-11-28 20:49:03,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:49:03,162 INFO L93 Difference]: Finished difference Result 327 states and 362 transitions. [2023-11-28 20:49:03,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 162 states. [2023-11-28 20:49:03,163 INFO L78 Accepts]: Start accepts. Automaton has has 280 states, 280 states have (on average 1.1321428571428571) internal successors, (317), 280 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 112 [2023-11-28 20:49:03,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:49:03,164 INFO L225 Difference]: With dead ends: 327 [2023-11-28 20:49:03,164 INFO L226 Difference]: Without dead ends: 321 [2023-11-28 20:49:03,171 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 435 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47095 ImplicationChecksByTransitivity, 150.5s TimeCoverageRelationStatistics Valid=6749, Invalid=183783, Unknown=0, NotChecked=0, Total=190532 [2023-11-28 20:49:03,171 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 573 mSDsluCounter, 545 mSDsCounter, 0 mSdLazyCounter, 41058 mSolverCounterSat, 3170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 573 SdHoareTripleChecker+Valid, 569 SdHoareTripleChecker+Invalid, 44228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3170 IncrementalHoareTripleChecker+Valid, 41058 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36.3s IncrementalHoareTripleChecker+Time [2023-11-28 20:49:03,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [573 Valid, 569 Invalid, 44228 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3170 Valid, 41058 Invalid, 0 Unknown, 0 Unchecked, 36.3s Time] [2023-11-28 20:49:03,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2023-11-28 20:49:03,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 152. [2023-11-28 20:49:03,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.086092715231788) internal successors, (164), 151 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:49:03,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 164 transitions. [2023-11-28 20:49:03,324 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 164 transitions. Word has length 112 [2023-11-28 20:49:03,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:49:03,324 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 164 transitions. [2023-11-28 20:49:03,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 280 states, 280 states have (on average 1.1321428571428571) internal successors, (317), 280 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) [2023-11-28 20:49:03,325 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 164 transitions. [2023-11-28 20:49:03,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-11-28 20:49:03,325 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:49:03,325 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 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, 1, 1, 1, 1] [2023-11-28 20:49:03,330 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-11-28 20:49:03,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-28 20:49:03,526 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:49:03,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:49:03,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1527097199, now seen corresponding path program 26 times [2023-11-28 20:49:03,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:49:03,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43995960] [2023-11-28 20:49:03,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:49:03,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:49:03,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:49:03,916 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 56 proven. 65 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2023-11-28 20:49:03,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:49:03,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43995960] [2023-11-28 20:49:03,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43995960] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:49:03,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375040870] [2023-11-28 20:49:03,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-28 20:49:03,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:49:03,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:49:03,918 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:49:03,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-28 20:49:04,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-28 20:49:04,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:49:04,049 INFO L262 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-28 20:49:04,051 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:49:04,310 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2023-11-28 20:49:04,310 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:49:04,518 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2023-11-28 20:49:04,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375040870] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:49:04,518 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:49:04,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 38 [2023-11-28 20:49:04,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476511195] [2023-11-28 20:49:04,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:49:04,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-11-28 20:49:04,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:49:04,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-11-28 20:49:04,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=1065, Unknown=0, NotChecked=0, Total=1406 [2023-11-28 20:49:04,520 INFO L87 Difference]: Start difference. First operand 152 states and 164 transitions. Second operand has 38 states, 38 states have (on average 1.736842105263158) internal successors, (66), 38 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:49:05,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:49:05,597 INFO L93 Difference]: Finished difference Result 396 states and 432 transitions. [2023-11-28 20:49:05,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-28 20:49:05,598 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.736842105263158) internal successors, (66), 38 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2023-11-28 20:49:05,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:49:05,599 INFO L225 Difference]: With dead ends: 396 [2023-11-28 20:49:05,599 INFO L226 Difference]: Without dead ends: 168 [2023-11-28 20:49:05,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 192 SyntacticMatches, 21 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1059 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=572, Invalid=1780, Unknown=0, NotChecked=0, Total=2352 [2023-11-28 20:49:05,600 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 104 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 911 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 1531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 911 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-28 20:49:05,600 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 44 Invalid, 1531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [911 Valid, 620 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-28 20:49:05,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2023-11-28 20:49:05,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 157. [2023-11-28 20:49:05,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.0769230769230769) internal successors, (168), 156 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) [2023-11-28 20:49:05,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 168 transitions. [2023-11-28 20:49:05,786 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 168 transitions. Word has length 113 [2023-11-28 20:49:05,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:49:05,787 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 168 transitions. [2023-11-28 20:49:05,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.736842105263158) internal successors, (66), 38 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:49:05,787 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 168 transitions. [2023-11-28 20:49:05,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2023-11-28 20:49:05,787 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:49:05,788 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:49:05,792 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-11-28 20:49:05,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-28 20:49:05,988 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:49:05,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:49:05,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1535120392, now seen corresponding path program 27 times [2023-11-28 20:49:05,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:49:05,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429985858] [2023-11-28 20:49:05,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:49:05,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:49:06,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:49:06,400 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 45 proven. 76 refuted. 0 times theorem prover too weak. 429 trivial. 0 not checked. [2023-11-28 20:49:06,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:49:06,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429985858] [2023-11-28 20:49:06,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429985858] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:49:06,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245212014] [2023-11-28 20:49:06,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-28 20:49:06,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:49:06,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:49:06,401 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:49:06,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-28 20:49:06,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-11-28 20:49:06,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:49:06,702 INFO L262 TraceCheckSpWp]: Trace formula consists of 572 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-28 20:49:06,704 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:49:06,899 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 55 proven. 66 refuted. 0 times theorem prover too weak. 429 trivial. 0 not checked. [2023-11-28 20:49:06,900 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:49:07,135 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 55 proven. 66 refuted. 0 times theorem prover too weak. 429 trivial. 0 not checked. [2023-11-28 20:49:07,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245212014] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:49:07,135 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:49:07,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 38 [2023-11-28 20:49:07,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059450616] [2023-11-28 20:49:07,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:49:07,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-11-28 20:49:07,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:49:07,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-11-28 20:49:07,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=1065, Unknown=0, NotChecked=0, Total=1406 [2023-11-28 20:49:07,137 INFO L87 Difference]: Start difference. First operand 157 states and 168 transitions. Second operand has 38 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 38 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:49:07,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:49:07,870 INFO L93 Difference]: Finished difference Result 162 states and 173 transitions. [2023-11-28 20:49:07,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-28 20:49:07,871 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 38 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2023-11-28 20:49:07,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:49:07,872 INFO L225 Difference]: With dead ends: 162 [2023-11-28 20:49:07,872 INFO L226 Difference]: Without dead ends: 122 [2023-11-28 20:49:07,872 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 210 SyntacticMatches, 22 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1225 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=583, Invalid=1967, Unknown=0, NotChecked=0, Total=2550 [2023-11-28 20:49:07,873 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 42 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 808 mSolverCounterSat, 509 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 1317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 509 IncrementalHoareTripleChecker+Valid, 808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-28 20:49:07,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 30 Invalid, 1317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [509 Valid, 808 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-28 20:49:07,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2023-11-28 20:49:07,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2023-11-28 20:49:07,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.0743801652892562) internal successors, (130), 121 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) [2023-11-28 20:49:07,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 130 transitions. [2023-11-28 20:49:07,996 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 130 transitions. Word has length 117 [2023-11-28 20:49:07,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:49:07,997 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 130 transitions. [2023-11-28 20:49:07,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 38 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:49:07,997 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 130 transitions. [2023-11-28 20:49:07,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-11-28 20:49:07,997 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:49:07,997 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 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, 1, 1, 1, 1] [2023-11-28 20:49:08,003 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-11-28 20:49:08,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:49:08,198 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:49:08,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:49:08,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1480142181, now seen corresponding path program 28 times [2023-11-28 20:49:08,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:49:08,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316737359] [2023-11-28 20:49:08,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:49:08,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:49:08,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:49:44,342 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 64 proven. 530 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:49:44,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:49:44,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316737359] [2023-11-28 20:49:44,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316737359] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:49:44,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644072594] [2023-11-28 20:49:44,343 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-28 20:49:44,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:49:44,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:49:44,344 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:49:44,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5523a4c0-0469-4f42-ad24-35780e06262c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-28 20:49:44,559 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-28 20:49:44,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:49:44,567 WARN L260 TraceCheckSpWp]: Trace formula consists of 592 conjuncts, 364 conjunts are in the unsatisfiable core [2023-11-28 20:49:44,574 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:49:44,730 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-28 20:50:17,703 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 11 proven. 528 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-28 20:50:17,703 INFO L327 TraceCheckSpWp]: Computing backward predicates...