./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/in-de52.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/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_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/in-de52.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/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_b9c1112e-6997-4ca9-83bc-36372ecd43c0/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 9b751a069fbdcae3e94881bf50bfce280447c39410a7e3e609a38e97e353596d --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 01:46:23,080 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 01:46:23,141 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 01:46:23,145 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 01:46:23,146 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 01:46:23,170 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 01:46:23,171 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 01:46:23,171 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 01:46:23,172 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 01:46:23,172 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 01:46:23,173 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 01:46:23,173 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 01:46:23,174 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 01:46:23,175 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 01:46:23,175 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 01:46:23,176 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 01:46:23,176 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 01:46:23,177 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 01:46:23,178 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 01:46:23,178 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 01:46:23,179 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 01:46:23,179 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 01:46:23,180 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 01:46:23,180 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 01:46:23,181 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 01:46:23,181 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 01:46:23,181 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 01:46:23,182 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 01:46:23,182 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 01:46:23,183 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 01:46:23,183 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 01:46:23,184 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 01:46:23,184 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 01:46:23,184 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 01:46:23,184 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 01:46:23,184 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 01:46:23,185 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 01:46:23,185 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 01:46:23,185 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 01:46:23,185 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 01:46:23,185 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 01:46:23,186 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 01:46:23,186 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_b9c1112e-6997-4ca9-83bc-36372ecd43c0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9b751a069fbdcae3e94881bf50bfce280447c39410a7e3e609a38e97e353596d [2023-11-29 01:46:23,388 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 01:46:23,411 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 01:46:23,414 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 01:46:23,415 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 01:46:23,415 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 01:46:23,416 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/loops-crafted-1/in-de52.c [2023-11-29 01:46:26,230 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 01:46:26,386 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 01:46:26,387 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/sv-benchmarks/c/loops-crafted-1/in-de52.c [2023-11-29 01:46:26,393 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/data/5780c9310/2d832b752c274b70bc18ed7c3be7a0c5/FLAG6fd0b3501 [2023-11-29 01:46:26,406 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/data/5780c9310/2d832b752c274b70bc18ed7c3be7a0c5 [2023-11-29 01:46:26,408 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 01:46:26,410 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 01:46:26,411 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 01:46:26,411 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 01:46:26,416 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 01:46:26,417 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 01:46:26" (1/1) ... [2023-11-29 01:46:26,418 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e009866 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:46:26, skipping insertion in model container [2023-11-29 01:46:26,418 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 01:46:26" (1/1) ... [2023-11-29 01:46:26,443 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 01:46:26,565 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_b9c1112e-6997-4ca9-83bc-36372ecd43c0/sv-benchmarks/c/loops-crafted-1/in-de52.c[368,381] [2023-11-29 01:46:26,579 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 01:46:26,588 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 01:46:26,598 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_b9c1112e-6997-4ca9-83bc-36372ecd43c0/sv-benchmarks/c/loops-crafted-1/in-de52.c[368,381] [2023-11-29 01:46:26,604 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 01:46:26,617 INFO L206 MainTranslator]: Completed translation [2023-11-29 01:46:26,618 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:46:26 WrapperNode [2023-11-29 01:46:26,618 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 01:46:26,619 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 01:46:26,619 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 01:46:26,619 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 01:46:26,625 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:46:26" (1/1) ... [2023-11-29 01:46:26,632 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:46:26" (1/1) ... [2023-11-29 01:46:26,648 INFO L138 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 75 [2023-11-29 01:46:26,649 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 01:46:26,649 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 01:46:26,649 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 01:46:26,649 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 01:46:26,659 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:46:26" (1/1) ... [2023-11-29 01:46:26,659 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:46:26" (1/1) ... [2023-11-29 01:46:26,660 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:46:26" (1/1) ... [2023-11-29 01:46:26,673 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-11-29 01:46:26,673 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:46:26" (1/1) ... [2023-11-29 01:46:26,673 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:46:26" (1/1) ... [2023-11-29 01:46:26,676 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:46:26" (1/1) ... [2023-11-29 01:46:26,681 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:46:26" (1/1) ... [2023-11-29 01:46:26,682 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:46:26" (1/1) ... [2023-11-29 01:46:26,683 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:46:26" (1/1) ... [2023-11-29 01:46:26,685 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 01:46:26,686 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 01:46:26,686 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 01:46:26,686 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 01:46:26,687 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:46:26" (1/1) ... [2023-11-29 01:46:26,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 01:46:26,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:46:26,714 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 01:46:26,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 01:46:26,752 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 01:46:26,753 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 01:46:26,753 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 01:46:26,753 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 01:46:26,813 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 01:46:26,815 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 01:46:26,944 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 01:46:26,965 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 01:46:26,965 INFO L309 CfgBuilder]: Removed 5 assume(true) statements. [2023-11-29 01:46:26,966 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 01:46:26 BoogieIcfgContainer [2023-11-29 01:46:26,966 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 01:46:26,969 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 01:46:26,969 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 01:46:26,972 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 01:46:26,972 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 01:46:26" (1/3) ... [2023-11-29 01:46:26,973 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@aaa0283 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 01:46:26, skipping insertion in model container [2023-11-29 01:46:26,973 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:46:26" (2/3) ... [2023-11-29 01:46:26,973 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@aaa0283 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 01:46:26, skipping insertion in model container [2023-11-29 01:46:26,974 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 01:46:26" (3/3) ... [2023-11-29 01:46:26,975 INFO L112 eAbstractionObserver]: Analyzing ICFG in-de52.c [2023-11-29 01:46:26,990 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 01:46:26,991 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 01:46:27,030 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 01:46:27,036 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;@21c37c3b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 01:46:27,037 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 01:46:27,040 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 12 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) [2023-11-29 01:46:27,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-29 01:46:27,046 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:46:27,046 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:46:27,047 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:46:27,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:46:27,052 INFO L85 PathProgramCache]: Analyzing trace with hash 577542875, now seen corresponding path program 1 times [2023-11-29 01:46:27,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:46:27,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641829475] [2023-11-29 01:46:27,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:46:27,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:46:27,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:46:27,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:46:27,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:46:27,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641829475] [2023-11-29 01:46:27,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641829475] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:46:27,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:46:27,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 01:46:27,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987530182] [2023-11-29 01:46:27,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:46:27,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 01:46:27,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:46:27,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 01:46:27,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 01:46:27,232 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 12 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) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:46:27,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:46:27,253 INFO L93 Difference]: Finished difference Result 24 states and 42 transitions. [2023-11-29 01:46:27,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 01:46:27,256 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2023-11-29 01:46:27,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:46:27,263 INFO L225 Difference]: With dead ends: 24 [2023-11-29 01:46:27,263 INFO L226 Difference]: Without dead ends: 11 [2023-11-29 01:46:27,266 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 01:46:27,270 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:46:27,271 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 15 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 01:46:27,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2023-11-29 01:46:27,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2023-11-29 01:46:27,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:46:27,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 15 transitions. [2023-11-29 01:46:27,301 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 15 transitions. Word has length 10 [2023-11-29 01:46:27,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:46:27,302 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 15 transitions. [2023-11-29 01:46:27,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:46:27,302 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 15 transitions. [2023-11-29 01:46:27,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-29 01:46:27,303 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:46:27,303 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:46:27,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 01:46:27,304 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:46:27,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:46:27,305 INFO L85 PathProgramCache]: Analyzing trace with hash 573848791, now seen corresponding path program 1 times [2023-11-29 01:46:27,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:46:27,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950276429] [2023-11-29 01:46:27,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:46:27,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:46:27,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:46:27,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:46:27,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:46:27,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950276429] [2023-11-29 01:46:27,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950276429] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:46:27,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:46:27,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 01:46:27,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231407372] [2023-11-29 01:46:27,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:46:27,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 01:46:27,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:46:27,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 01:46:27,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 01:46:27,495 INFO L87 Difference]: Start difference. First operand 11 states and 15 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:46:27,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:46:27,554 INFO L93 Difference]: Finished difference Result 26 states and 37 transitions. [2023-11-29 01:46:27,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 01:46:27,555 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2023-11-29 01:46:27,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:46:27,555 INFO L225 Difference]: With dead ends: 26 [2023-11-29 01:46:27,555 INFO L226 Difference]: Without dead ends: 17 [2023-11-29 01:46:27,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 01:46:27,558 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 5 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:46:27,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 22 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 01:46:27,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-11-29 01:46:27,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-11-29 01:46:27,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:46:27,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 24 transitions. [2023-11-29 01:46:27,567 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 24 transitions. Word has length 10 [2023-11-29 01:46:27,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:46:27,568 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 24 transitions. [2023-11-29 01:46:27,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:46:27,568 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 24 transitions. [2023-11-29 01:46:27,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-29 01:46:27,569 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:46:27,569 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:46:27,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 01:46:27,569 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:46:27,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:46:27,570 INFO L85 PathProgramCache]: Analyzing trace with hash 611108754, now seen corresponding path program 1 times [2023-11-29 01:46:27,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:46:27,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272144191] [2023-11-29 01:46:27,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:46:27,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:46:27,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:46:27,615 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:46:27,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:46:27,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272144191] [2023-11-29 01:46:27,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272144191] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:46:27,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:46:27,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 01:46:27,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054973165] [2023-11-29 01:46:27,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:46:27,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:46:27,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:46:27,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:46:27,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:46:27,619 INFO L87 Difference]: Start difference. First operand 17 states and 24 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:46:27,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:46:27,645 INFO L93 Difference]: Finished difference Result 27 states and 38 transitions. [2023-11-29 01:46:27,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:46:27,646 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2023-11-29 01:46:27,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:46:27,647 INFO L225 Difference]: With dead ends: 27 [2023-11-29 01:46:27,647 INFO L226 Difference]: Without dead ends: 21 [2023-11-29 01:46:27,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:46:27,649 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 5 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:46:27,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 17 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 01:46:27,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-11-29 01:46:27,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-11-29 01:46:27,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:46:27,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 30 transitions. [2023-11-29 01:46:27,659 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 30 transitions. Word has length 11 [2023-11-29 01:46:27,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:46:27,660 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 30 transitions. [2023-11-29 01:46:27,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:46:27,660 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 30 transitions. [2023-11-29 01:46:27,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-29 01:46:27,661 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:46:27,661 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:46:27,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 01:46:27,662 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:46:27,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:46:27,662 INFO L85 PathProgramCache]: Analyzing trace with hash 656361283, now seen corresponding path program 1 times [2023-11-29 01:46:27,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:46:27,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548853891] [2023-11-29 01:46:27,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:46:27,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:46:27,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:46:27,701 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:46:27,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:46:27,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548853891] [2023-11-29 01:46:27,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548853891] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:46:27,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:46:27,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 01:46:27,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584088733] [2023-11-29 01:46:27,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:46:27,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:46:27,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:46:27,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:46:27,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:46:27,704 INFO L87 Difference]: Start difference. First operand 21 states and 30 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:46:27,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:46:27,735 INFO L93 Difference]: Finished difference Result 36 states and 52 transitions. [2023-11-29 01:46:27,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:46:27,736 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2023-11-29 01:46:27,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:46:27,737 INFO L225 Difference]: With dead ends: 36 [2023-11-29 01:46:27,737 INFO L226 Difference]: Without dead ends: 26 [2023-11-29 01:46:27,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:46:27,739 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 6 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:46:27,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 16 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 01:46:27,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-29 01:46:27,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-11-29 01:46:27,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:46:27,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2023-11-29 01:46:27,753 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 11 [2023-11-29 01:46:27,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:46:27,754 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2023-11-29 01:46:27,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:46:27,754 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2023-11-29 01:46:27,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-29 01:46:27,755 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:46:27,755 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:46:27,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-29 01:46:27,756 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:46:27,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:46:27,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1044350857, now seen corresponding path program 1 times [2023-11-29 01:46:27,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:46:27,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062768652] [2023-11-29 01:46:27,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:46:27,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:46:27,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:46:27,835 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 01:46:27,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:46:27,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062768652] [2023-11-29 01:46:27,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062768652] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:46:27,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:46:27,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 01:46:27,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341188083] [2023-11-29 01:46:27,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:46:27,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 01:46:27,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:46:27,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 01:46:27,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 01:46:27,839 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:46:27,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:46:27,880 INFO L93 Difference]: Finished difference Result 33 states and 44 transitions. [2023-11-29 01:46:27,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 01:46:27,881 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-29 01:46:27,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:46:27,881 INFO L225 Difference]: With dead ends: 33 [2023-11-29 01:46:27,881 INFO L226 Difference]: Without dead ends: 22 [2023-11-29 01:46:27,882 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 01:46:27,883 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 1 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:46:27,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 26 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 01:46:27,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-11-29 01:46:27,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-11-29 01:46:27,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 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) [2023-11-29 01:46:27,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2023-11-29 01:46:27,894 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 12 [2023-11-29 01:46:27,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:46:27,894 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2023-11-29 01:46:27,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:46:27,895 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2023-11-29 01:46:27,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-29 01:46:27,895 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:46:27,896 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:46:27,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-29 01:46:27,896 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:46:27,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:46:27,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1846839420, now seen corresponding path program 1 times [2023-11-29 01:46:27,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:46:27,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314476540] [2023-11-29 01:46:27,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:46:27,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:46:27,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:46:28,007 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 01:46:28,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:46:28,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314476540] [2023-11-29 01:46:28,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314476540] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:46:28,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001966610] [2023-11-29 01:46:28,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:46:28,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:46:28,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:46:28,020 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:46:28,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 01:46:28,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:46:28,071 INFO L262 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 01:46:28,075 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:46:28,111 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 01:46:28,111 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:46:28,149 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 01:46:28,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001966610] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 01:46:28,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:46:28,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-11-29 01:46:28,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424292712] [2023-11-29 01:46:28,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:46:28,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 01:46:28,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:46:28,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 01:46:28,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-29 01:46:28,152 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:46:28,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:46:28,187 INFO L93 Difference]: Finished difference Result 28 states and 37 transitions. [2023-11-29 01:46:28,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 01:46:28,188 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 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 13 [2023-11-29 01:46:28,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:46:28,189 INFO L225 Difference]: With dead ends: 28 [2023-11-29 01:46:28,189 INFO L226 Difference]: Without dead ends: 19 [2023-11-29 01:46:28,190 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-29 01:46:28,191 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 1 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:46:28,191 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 20 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 01:46:28,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-11-29 01:46:28,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-11-29 01:46:28,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:46:28,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 26 transitions. [2023-11-29 01:46:28,199 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 26 transitions. Word has length 13 [2023-11-29 01:46:28,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:46:28,199 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 26 transitions. [2023-11-29 01:46:28,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:46:28,199 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 26 transitions. [2023-11-29 01:46:28,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-29 01:46:28,200 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:46:28,200 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:46:28,206 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 01:46:28,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-29 01:46:28,401 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:46:28,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:46:28,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1991740900, now seen corresponding path program 1 times [2023-11-29 01:46:28,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:46:28,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650992989] [2023-11-29 01:46:28,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:46:28,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:46:28,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:46:28,476 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 01:46:28,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:46:28,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650992989] [2023-11-29 01:46:28,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650992989] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:46:28,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106588206] [2023-11-29 01:46:28,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:46:28,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:46:28,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:46:28,479 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:46:28,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 01:46:28,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:46:28,527 INFO L262 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 01:46:28,528 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:46:28,564 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 01:46:28,564 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:46:28,601 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 01:46:28,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106588206] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 01:46:28,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:46:28,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 4] total 8 [2023-11-29 01:46:28,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806971690] [2023-11-29 01:46:28,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:46:28,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 01:46:28,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:46:28,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 01:46:28,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-11-29 01:46:28,603 INFO L87 Difference]: Start difference. First operand 19 states and 26 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:46:28,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:46:28,631 INFO L93 Difference]: Finished difference Result 23 states and 29 transitions. [2023-11-29 01:46:28,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 01:46:28,632 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 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 13 [2023-11-29 01:46:28,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:46:28,632 INFO L225 Difference]: With dead ends: 23 [2023-11-29 01:46:28,632 INFO L226 Difference]: Without dead ends: 16 [2023-11-29 01:46:28,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-11-29 01:46:28,634 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 3 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:46:28,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 19 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 01:46:28,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-11-29 01:46:28,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2023-11-29 01:46:28,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:46:28,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 21 transitions. [2023-11-29 01:46:28,639 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 21 transitions. Word has length 13 [2023-11-29 01:46:28,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:46:28,640 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 21 transitions. [2023-11-29 01:46:28,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:46:28,640 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 21 transitions. [2023-11-29 01:46:28,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-29 01:46:28,640 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:46:28,641 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:46:28,646 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-29 01:46:28,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-29 01:46:28,842 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:46:28,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:46:28,842 INFO L85 PathProgramCache]: Analyzing trace with hash -2140868714, now seen corresponding path program 1 times [2023-11-29 01:46:28,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:46:28,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772815295] [2023-11-29 01:46:28,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:46:28,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:46:28,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:46:28,925 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 01:46:28,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:46:28,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772815295] [2023-11-29 01:46:28,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772815295] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:46:28,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999471795] [2023-11-29 01:46:28,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:46:28,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:46:28,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:46:28,928 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:46:28,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 01:46:28,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:46:28,977 INFO L262 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 01:46:28,979 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:46:29,029 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 01:46:29,029 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:46:29,073 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 01:46:29,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999471795] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:46:29,074 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:46:29,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2023-11-29 01:46:29,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704999478] [2023-11-29 01:46:29,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:46:29,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 01:46:29,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:46:29,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 01:46:29,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 01:46:29,076 INFO L87 Difference]: Start difference. First operand 16 states and 21 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:46:29,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:46:29,121 INFO L93 Difference]: Finished difference Result 26 states and 34 transitions. [2023-11-29 01:46:29,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 01:46:29,122 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 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 14 [2023-11-29 01:46:29,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:46:29,122 INFO L225 Difference]: With dead ends: 26 [2023-11-29 01:46:29,123 INFO L226 Difference]: Without dead ends: 20 [2023-11-29 01:46:29,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 01:46:29,124 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 6 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:46:29,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 22 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 01:46:29,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-11-29 01:46:29,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-11-29 01:46:29,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:46:29,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 27 transitions. [2023-11-29 01:46:29,133 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 27 transitions. Word has length 14 [2023-11-29 01:46:29,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:46:29,134 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 27 transitions. [2023-11-29 01:46:29,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:46:29,134 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 27 transitions. [2023-11-29 01:46:29,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-29 01:46:29,135 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:46:29,135 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:46:29,141 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 01:46:29,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:46:29,341 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:46:29,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:46:29,342 INFO L85 PathProgramCache]: Analyzing trace with hash -2095616185, now seen corresponding path program 1 times [2023-11-29 01:46:29,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:46:29,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718293365] [2023-11-29 01:46:29,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:46:29,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:46:29,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:46:29,446 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 01:46:29,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:46:29,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718293365] [2023-11-29 01:46:29,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718293365] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:46:29,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153098724] [2023-11-29 01:46:29,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:46:29,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:46:29,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:46:29,449 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:46:29,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 01:46:29,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:46:29,498 INFO L262 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 01:46:29,500 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:46:29,583 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:46:29,583 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:46:29,724 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 01:46:29,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153098724] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:46:29,724 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:46:29,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 15 [2023-11-29 01:46:29,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134005858] [2023-11-29 01:46:29,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:46:29,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 01:46:29,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:46:29,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 01:46:29,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2023-11-29 01:46:29,727 INFO L87 Difference]: Start difference. First operand 20 states and 27 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:46:30,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:46:30,000 INFO L93 Difference]: Finished difference Result 65 states and 91 transitions. [2023-11-29 01:46:30,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-29 01:46:30,001 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-11-29 01:46:30,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:46:30,002 INFO L225 Difference]: With dead ends: 65 [2023-11-29 01:46:30,003 INFO L226 Difference]: Without dead ends: 48 [2023-11-29 01:46:30,003 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2023-11-29 01:46:30,004 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 31 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:46:30,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 66 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 01:46:30,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-11-29 01:46:30,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 35. [2023-11-29 01:46:30,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 34 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) [2023-11-29 01:46:30,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 47 transitions. [2023-11-29 01:46:30,020 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 47 transitions. Word has length 14 [2023-11-29 01:46:30,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:46:30,020 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 47 transitions. [2023-11-29 01:46:30,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:46:30,021 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 47 transitions. [2023-11-29 01:46:30,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-29 01:46:30,021 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:46:30,021 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:46:30,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-29 01:46:30,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:46:30,224 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:46:30,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:46:30,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1908629782, now seen corresponding path program 1 times [2023-11-29 01:46:30,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:46:30,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705192816] [2023-11-29 01:46:30,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:46:30,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:46:30,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:46:30,333 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 01:46:30,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:46:30,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705192816] [2023-11-29 01:46:30,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705192816] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:46:30,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052115015] [2023-11-29 01:46:30,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:46:30,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:46:30,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:46:30,335 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:46:30,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 01:46:30,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:46:30,385 INFO L262 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 01:46:30,386 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:46:30,418 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 01:46:30,418 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:46:30,456 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 01:46:30,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052115015] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:46:30,456 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:46:30,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2023-11-29 01:46:30,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573430362] [2023-11-29 01:46:30,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:46:30,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 01:46:30,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:46:30,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 01:46:30,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 01:46:30,458 INFO L87 Difference]: Start difference. First operand 35 states and 47 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:46:30,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:46:30,492 INFO L93 Difference]: Finished difference Result 45 states and 61 transitions. [2023-11-29 01:46:30,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 01:46:30,494 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-11-29 01:46:30,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:46:30,494 INFO L225 Difference]: With dead ends: 45 [2023-11-29 01:46:30,495 INFO L226 Difference]: Without dead ends: 27 [2023-11-29 01:46:30,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 01:46:30,496 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 6 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:46:30,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 23 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 01:46:30,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-11-29 01:46:30,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-11-29 01:46:30,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:46:30,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2023-11-29 01:46:30,506 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 16 [2023-11-29 01:46:30,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:46:30,506 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2023-11-29 01:46:30,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:46:30,507 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2023-11-29 01:46:30,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-29 01:46:30,507 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:46:30,507 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:46:30,512 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 01:46:30,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 01:46:30,708 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:46:30,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:46:30,709 INFO L85 PathProgramCache]: Analyzing trace with hash -44680555, now seen corresponding path program 2 times [2023-11-29 01:46:30,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:46:30,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125428293] [2023-11-29 01:46:30,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:46:30,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:46:30,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:46:30,823 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 01:46:30,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:46:30,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125428293] [2023-11-29 01:46:30,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125428293] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:46:30,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693548081] [2023-11-29 01:46:30,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 01:46:30,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:46:30,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:46:30,825 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:46:30,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 01:46:30,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 01:46:30,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:46:30,871 INFO L262 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-29 01:46:30,873 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:46:30,905 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 01:46:30,905 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:46:31,017 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 01:46:31,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693548081] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:46:31,018 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:46:31,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 14 [2023-11-29 01:46:31,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936605064] [2023-11-29 01:46:31,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:46:31,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 01:46:31,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:46:31,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 01:46:31,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2023-11-29 01:46:31,020 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:46:31,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:46:31,320 INFO L93 Difference]: Finished difference Result 83 states and 114 transitions. [2023-11-29 01:46:31,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-29 01:46:31,321 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-11-29 01:46:31,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:46:31,322 INFO L225 Difference]: With dead ends: 83 [2023-11-29 01:46:31,322 INFO L226 Difference]: Without dead ends: 60 [2023-11-29 01:46:31,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2023-11-29 01:46:31,323 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 34 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:46:31,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 128 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 01:46:31,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-11-29 01:46:31,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 43. [2023-11-29 01:46:31,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.4761904761904763) internal successors, (62), 42 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:46:31,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 62 transitions. [2023-11-29 01:46:31,342 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 62 transitions. Word has length 16 [2023-11-29 01:46:31,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:46:31,342 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 62 transitions. [2023-11-29 01:46:31,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:46:31,343 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 62 transitions. [2023-11-29 01:46:31,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-29 01:46:31,343 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:46:31,344 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:46:31,349 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 01:46:31,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-29 01:46:31,550 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:46:31,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:46:31,550 INFO L85 PathProgramCache]: Analyzing trace with hash -983462638, now seen corresponding path program 2 times [2023-11-29 01:46:31,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:46:31,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286690467] [2023-11-29 01:46:31,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:46:31,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:46:31,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:46:31,671 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:46:31,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:46:31,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286690467] [2023-11-29 01:46:31,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286690467] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:46:31,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107928912] [2023-11-29 01:46:31,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 01:46:31,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:46:31,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:46:31,673 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:46:31,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 01:46:31,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 01:46:31,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:46:31,719 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 01:46:31,720 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:46:31,780 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 01:46:31,780 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:46:31,852 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 01:46:31,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107928912] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:46:31,853 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:46:31,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 12 [2023-11-29 01:46:31,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976701473] [2023-11-29 01:46:31,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:46:31,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 01:46:31,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:46:31,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 01:46:31,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2023-11-29 01:46:31,855 INFO L87 Difference]: Start difference. First operand 43 states and 62 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:46:32,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:46:32,329 INFO L93 Difference]: Finished difference Result 76 states and 111 transitions. [2023-11-29 01:46:32,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-29 01:46:32,330 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-11-29 01:46:32,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:46:32,331 INFO L225 Difference]: With dead ends: 76 [2023-11-29 01:46:32,331 INFO L226 Difference]: Without dead ends: 56 [2023-11-29 01:46:32,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=141, Invalid=671, Unknown=0, NotChecked=0, Total=812 [2023-11-29 01:46:32,333 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 40 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:46:32,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 54 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 01:46:32,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-11-29 01:46:32,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 50. [2023-11-29 01:46:32,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.3877551020408163) internal successors, (68), 49 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:46:32,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 68 transitions. [2023-11-29 01:46:32,362 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 68 transitions. Word has length 17 [2023-11-29 01:46:32,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:46:32,363 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 68 transitions. [2023-11-29 01:46:32,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:46:32,363 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 68 transitions. [2023-11-29 01:46:32,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-29 01:46:32,364 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:46:32,364 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:46:32,369 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 01:46:32,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-29 01:46:32,566 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:46:32,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:46:32,567 INFO L85 PathProgramCache]: Analyzing trace with hash 179882055, now seen corresponding path program 3 times [2023-11-29 01:46:32,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:46:32,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117093961] [2023-11-29 01:46:32,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:46:32,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:46:32,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:46:32,672 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 01:46:32,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:46:32,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117093961] [2023-11-29 01:46:32,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117093961] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:46:32,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739399455] [2023-11-29 01:46:32,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 01:46:32,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:46:32,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:46:32,674 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:46:32,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 01:46:32,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 01:46:32,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:46:32,726 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-29 01:46:32,727 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:46:32,809 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-29 01:46:32,810 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:46:33,006 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 01:46:33,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739399455] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:46:33,006 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:46:33,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9] total 19 [2023-11-29 01:46:33,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055831601] [2023-11-29 01:46:33,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:46:33,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 01:46:33,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:46:33,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 01:46:33,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2023-11-29 01:46:33,009 INFO L87 Difference]: Start difference. First operand 50 states and 68 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:46:34,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:46:34,426 INFO L93 Difference]: Finished difference Result 136 states and 188 transitions. [2023-11-29 01:46:34,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-11-29 01:46:34,426 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-11-29 01:46:34,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:46:34,427 INFO L225 Difference]: With dead ends: 136 [2023-11-29 01:46:34,427 INFO L226 Difference]: Without dead ends: 97 [2023-11-29 01:46:34,429 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=443, Invalid=2107, Unknown=0, NotChecked=0, Total=2550 [2023-11-29 01:46:34,430 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 82 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 01:46:34,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 167 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 01:46:34,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-11-29 01:46:34,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 67. [2023-11-29 01:46:34,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.4242424242424243) internal successors, (94), 66 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) [2023-11-29 01:46:34,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 94 transitions. [2023-11-29 01:46:34,461 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 94 transitions. Word has length 18 [2023-11-29 01:46:34,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:46:34,461 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 94 transitions. [2023-11-29 01:46:34,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:46:34,462 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 94 transitions. [2023-11-29 01:46:34,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-29 01:46:34,463 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:46:34,463 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:46:34,468 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 01:46:34,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-29 01:46:34,664 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:46:34,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:46:34,664 INFO L85 PathProgramCache]: Analyzing trace with hash 376510755, now seen corresponding path program 4 times [2023-11-29 01:46:34,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:46:34,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840584423] [2023-11-29 01:46:34,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:46:34,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:46:34,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:46:34,789 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 01:46:34,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:46:34,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840584423] [2023-11-29 01:46:34,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840584423] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:46:34,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025156725] [2023-11-29 01:46:34,790 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 01:46:34,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:46:34,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:46:34,791 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:46:34,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 01:46:34,838 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 01:46:34,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:46:34,839 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 01:46:34,840 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:46:34,873 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 01:46:34,873 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:46:34,924 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 01:46:34,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025156725] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:46:34,924 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:46:34,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2023-11-29 01:46:34,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374606320] [2023-11-29 01:46:34,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:46:34,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 01:46:34,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:46:34,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 01:46:34,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 01:46:34,926 INFO L87 Difference]: Start difference. First operand 67 states and 94 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:46:35,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:46:35,020 INFO L93 Difference]: Finished difference Result 81 states and 111 transitions. [2023-11-29 01:46:35,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 01:46:35,020 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-11-29 01:46:35,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:46:35,021 INFO L225 Difference]: With dead ends: 81 [2023-11-29 01:46:35,021 INFO L226 Difference]: Without dead ends: 69 [2023-11-29 01:46:35,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 6 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-29 01:46:35,022 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:46:35,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 26 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 01:46:35,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-11-29 01:46:35,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2023-11-29 01:46:35,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.3970588235294117) internal successors, (95), 68 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:46:35,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 95 transitions. [2023-11-29 01:46:35,049 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 95 transitions. Word has length 19 [2023-11-29 01:46:35,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:46:35,049 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 95 transitions. [2023-11-29 01:46:35,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:46:35,049 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 95 transitions. [2023-11-29 01:46:35,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-29 01:46:35,050 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:46:35,050 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:46:35,060 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-29 01:46:35,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:46:35,257 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:46:35,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:46:35,257 INFO L85 PathProgramCache]: Analyzing trace with hash -867982685, now seen corresponding path program 3 times [2023-11-29 01:46:35,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:46:35,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020889883] [2023-11-29 01:46:35,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:46:35,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:46:35,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:46:35,381 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 01:46:35,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:46:35,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020889883] [2023-11-29 01:46:35,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020889883] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:46:35,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259410631] [2023-11-29 01:46:35,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 01:46:35,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:46:35,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:46:35,383 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:46:35,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 01:46:35,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 01:46:35,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:46:35,446 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 01:46:35,448 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:46:35,526 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 01:46:35,526 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:46:35,642 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 01:46:35,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259410631] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:46:35,643 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:46:35,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 6] total 15 [2023-11-29 01:46:35,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464234179] [2023-11-29 01:46:35,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:46:35,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 01:46:35,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:46:35,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 01:46:35,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2023-11-29 01:46:35,645 INFO L87 Difference]: Start difference. First operand 69 states and 95 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:46:36,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:46:36,638 INFO L93 Difference]: Finished difference Result 163 states and 227 transitions. [2023-11-29 01:46:36,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-29 01:46:36,639 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-11-29 01:46:36,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:46:36,640 INFO L225 Difference]: With dead ends: 163 [2023-11-29 01:46:36,640 INFO L226 Difference]: Without dead ends: 135 [2023-11-29 01:46:36,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 33 SyntacticMatches, 6 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=243, Invalid=1563, Unknown=0, NotChecked=0, Total=1806 [2023-11-29 01:46:36,642 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 134 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 01:46:36,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 166 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 01:46:36,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2023-11-29 01:46:36,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 92. [2023-11-29 01:46:36,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.3516483516483517) internal successors, (123), 91 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:46:36,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 123 transitions. [2023-11-29 01:46:36,680 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 123 transitions. Word has length 19 [2023-11-29 01:46:36,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:46:36,680 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 123 transitions. [2023-11-29 01:46:36,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:46:36,680 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 123 transitions. [2023-11-29 01:46:36,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-29 01:46:36,681 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:46:36,681 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:46:36,686 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-29 01:46:36,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:46:36,882 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:46:36,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:46:36,882 INFO L85 PathProgramCache]: Analyzing trace with hash -1184261561, now seen corresponding path program 2 times [2023-11-29 01:46:36,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:46:36,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280945137] [2023-11-29 01:46:36,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:46:36,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:46:36,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:46:37,032 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 01:46:37,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:46:37,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280945137] [2023-11-29 01:46:37,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280945137] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:46:37,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494536675] [2023-11-29 01:46:37,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 01:46:37,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:46:37,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:46:37,034 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:46:37,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 01:46:37,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 01:46:37,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:46:37,089 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-29 01:46:37,090 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:46:37,175 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 01:46:37,176 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:46:37,267 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 01:46:37,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494536675] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:46:37,267 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:46:37,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 6] total 15 [2023-11-29 01:46:37,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730097245] [2023-11-29 01:46:37,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:46:37,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 01:46:37,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:46:37,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 01:46:37,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2023-11-29 01:46:37,269 INFO L87 Difference]: Start difference. First operand 92 states and 123 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:46:38,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:46:38,399 INFO L93 Difference]: Finished difference Result 132 states and 180 transitions. [2023-11-29 01:46:38,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-11-29 01:46:38,400 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-11-29 01:46:38,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:46:38,400 INFO L225 Difference]: With dead ends: 132 [2023-11-29 01:46:38,401 INFO L226 Difference]: Without dead ends: 106 [2023-11-29 01:46:38,402 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 32 SyntacticMatches, 6 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 781 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=372, Invalid=2708, Unknown=0, NotChecked=0, Total=3080 [2023-11-29 01:46:38,402 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 102 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 01:46:38,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 29 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 01:46:38,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2023-11-29 01:46:38,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 81. [2023-11-29 01:46:38,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.3125) internal successors, (105), 80 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:46:38,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 105 transitions. [2023-11-29 01:46:38,435 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 105 transitions. Word has length 20 [2023-11-29 01:46:38,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:46:38,435 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 105 transitions. [2023-11-29 01:46:38,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:46:38,436 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 105 transitions. [2023-11-29 01:46:38,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-29 01:46:38,436 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:46:38,436 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:46:38,441 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 01:46:38,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 01:46:38,638 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:46:38,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:46:38,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1139243939, now seen corresponding path program 5 times [2023-11-29 01:46:38,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:46:38,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084277418] [2023-11-29 01:46:38,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:46:38,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:46:38,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:46:38,764 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-29 01:46:38,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:46:38,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084277418] [2023-11-29 01:46:38,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084277418] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:46:38,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202094925] [2023-11-29 01:46:38,765 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 01:46:38,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:46:38,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:46:38,766 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:46:38,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 01:46:38,832 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-29 01:46:38,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:46:38,833 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 01:46:38,834 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:46:38,857 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-29 01:46:38,857 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:46:38,901 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-29 01:46:38,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202094925] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:46:38,901 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:46:38,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2023-11-29 01:46:38,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706735800] [2023-11-29 01:46:38,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:46:38,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 01:46:38,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:46:38,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 01:46:38,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 01:46:38,902 INFO L87 Difference]: Start difference. First operand 81 states and 105 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:46:38,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:46:38,964 INFO L93 Difference]: Finished difference Result 103 states and 134 transitions. [2023-11-29 01:46:38,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 01:46:38,965 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-11-29 01:46:38,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:46:38,965 INFO L225 Difference]: With dead ends: 103 [2023-11-29 01:46:38,966 INFO L226 Difference]: Without dead ends: 79 [2023-11-29 01:46:38,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 7 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 01:46:38,967 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 6 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:46:38,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 32 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 01:46:38,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-11-29 01:46:38,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2023-11-29 01:46:38,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.3205128205128205) internal successors, (103), 78 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:46:38,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 103 transitions. [2023-11-29 01:46:38,996 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 103 transitions. Word has length 21 [2023-11-29 01:46:38,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:46:38,997 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 103 transitions. [2023-11-29 01:46:38,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:46:38,997 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 103 transitions. [2023-11-29 01:46:38,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-29 01:46:38,997 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:46:38,998 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:46:39,002 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 01:46:39,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:46:39,198 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:46:39,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:46:39,199 INFO L85 PathProgramCache]: Analyzing trace with hash -134959996, now seen corresponding path program 6 times [2023-11-29 01:46:39,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:46:39,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236709769] [2023-11-29 01:46:39,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:46:39,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:46:39,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:46:39,335 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 01:46:39,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:46:39,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236709769] [2023-11-29 01:46:39,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236709769] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:46:39,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077344225] [2023-11-29 01:46:39,336 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 01:46:39,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:46:39,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:46:39,337 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:46:39,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 01:46:39,387 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-29 01:46:39,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:46:39,389 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 01:46:39,390 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:46:39,448 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-11-29 01:46:39,449 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:46:39,543 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-11-29 01:46:39,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077344225] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:46:39,543 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:46:39,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 6] total 17 [2023-11-29 01:46:39,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191128978] [2023-11-29 01:46:39,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:46:39,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-29 01:46:39,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:46:39,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-29 01:46:39,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2023-11-29 01:46:39,545 INFO L87 Difference]: Start difference. First operand 79 states and 103 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:46:40,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:46:40,057 INFO L93 Difference]: Finished difference Result 205 states and 269 transitions. [2023-11-29 01:46:40,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-29 01:46:40,057 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 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) Word has length 21 [2023-11-29 01:46:40,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:46:40,059 INFO L225 Difference]: With dead ends: 205 [2023-11-29 01:46:40,059 INFO L226 Difference]: Without dead ends: 172 [2023-11-29 01:46:40,059 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=206, Invalid=724, Unknown=0, NotChecked=0, Total=930 [2023-11-29 01:46:40,060 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 138 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 01:46:40,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 305 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 01:46:40,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2023-11-29 01:46:40,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 82. [2023-11-29 01:46:40,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.271604938271605) internal successors, (103), 81 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:46:40,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 103 transitions. [2023-11-29 01:46:40,091 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 103 transitions. Word has length 21 [2023-11-29 01:46:40,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:46:40,091 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 103 transitions. [2023-11-29 01:46:40,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:46:40,092 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 103 transitions. [2023-11-29 01:46:40,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-29 01:46:40,092 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:46:40,092 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:46:40,098 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 01:46:40,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 01:46:40,296 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:46:40,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:46:40,297 INFO L85 PathProgramCache]: Analyzing trace with hash -684296169, now seen corresponding path program 3 times [2023-11-29 01:46:40,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:46:40,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116958778] [2023-11-29 01:46:40,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:46:40,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:46:40,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:46:40,442 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 01:46:40,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:46:40,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116958778] [2023-11-29 01:46:40,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116958778] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:46:40,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755008506] [2023-11-29 01:46:40,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 01:46:40,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:46:40,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:46:40,446 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:46:40,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 01:46:40,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 01:46:40,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:46:40,489 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-29 01:46:40,491 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:46:40,603 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-29 01:46:40,603 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:46:40,842 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-29 01:46:40,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755008506] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:46:40,843 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:46:40,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 10] total 26 [2023-11-29 01:46:40,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355370277] [2023-11-29 01:46:40,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:46:40,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-29 01:46:40,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:46:40,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-29 01:46:40,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2023-11-29 01:46:40,845 INFO L87 Difference]: Start difference. First operand 82 states and 103 transitions. Second operand has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:46:43,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:46:43,081 INFO L93 Difference]: Finished difference Result 226 states and 302 transitions. [2023-11-29 01:46:43,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-11-29 01:46:43,082 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 26 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 22 [2023-11-29 01:46:43,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:46:43,083 INFO L225 Difference]: With dead ends: 226 [2023-11-29 01:46:43,083 INFO L226 Difference]: Without dead ends: 185 [2023-11-29 01:46:43,085 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1423 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=767, Invalid=5395, Unknown=0, NotChecked=0, Total=6162 [2023-11-29 01:46:43,086 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 129 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 1511 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 480 SdHoareTripleChecker+Invalid, 1694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 1511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-29 01:46:43,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 480 Invalid, 1694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 1511 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-29 01:46:43,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2023-11-29 01:46:43,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 106. [2023-11-29 01:46:43,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.380952380952381) internal successors, (145), 105 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:46:43,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 145 transitions. [2023-11-29 01:46:43,125 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 145 transitions. Word has length 22 [2023-11-29 01:46:43,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:46:43,126 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 145 transitions. [2023-11-29 01:46:43,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:46:43,126 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 145 transitions. [2023-11-29 01:46:43,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-29 01:46:43,126 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:46:43,126 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:46:43,130 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 01:46:43,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:46:43,327 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:46:43,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:46:43,327 INFO L85 PathProgramCache]: Analyzing trace with hash 732123794, now seen corresponding path program 4 times [2023-11-29 01:46:43,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:46:43,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418683181] [2023-11-29 01:46:43,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:46:43,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:46:43,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:46:43,513 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:46:43,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:46:43,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418683181] [2023-11-29 01:46:43,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418683181] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:46:43,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953881289] [2023-11-29 01:46:43,514 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 01:46:43,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:46:43,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:46:43,516 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:46:43,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 01:46:43,570 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 01:46:43,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:46:43,571 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 01:46:43,573 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:46:43,678 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-29 01:46:43,678 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:46:43,792 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-29 01:46:43,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953881289] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:46:43,792 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:46:43,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 7] total 18 [2023-11-29 01:46:43,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352557596] [2023-11-29 01:46:43,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:46:43,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 01:46:43,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:46:43,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 01:46:43,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2023-11-29 01:46:43,794 INFO L87 Difference]: Start difference. First operand 106 states and 145 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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) [2023-11-29 01:46:46,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:46:46,306 INFO L93 Difference]: Finished difference Result 211 states and 309 transitions. [2023-11-29 01:46:46,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-11-29 01:46:46,306 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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) Word has length 23 [2023-11-29 01:46:46,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:46:46,307 INFO L225 Difference]: With dead ends: 211 [2023-11-29 01:46:46,307 INFO L226 Difference]: Without dead ends: 180 [2023-11-29 01:46:46,309 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 36 SyntacticMatches, 8 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1350 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=572, Invalid=4398, Unknown=0, NotChecked=0, Total=4970 [2023-11-29 01:46:46,309 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 176 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 01:46:46,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 73 Invalid, 848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 749 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 01:46:46,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2023-11-29 01:46:46,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 135. [2023-11-29 01:46:46,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.3582089552238805) internal successors, (182), 134 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:46:46,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 182 transitions. [2023-11-29 01:46:46,359 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 182 transitions. Word has length 23 [2023-11-29 01:46:46,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:46:46,359 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 182 transitions. [2023-11-29 01:46:46,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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) [2023-11-29 01:46:46,359 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 182 transitions. [2023-11-29 01:46:46,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-29 01:46:46,359 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:46:46,360 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:46:46,364 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 01:46:46,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:46:46,560 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:46:46,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:46:46,561 INFO L85 PathProgramCache]: Analyzing trace with hash 752963510, now seen corresponding path program 7 times [2023-11-29 01:46:46,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:46:46,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591736579] [2023-11-29 01:46:46,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:46:46,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:46:46,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:46:46,692 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-29 01:46:46,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:46:46,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591736579] [2023-11-29 01:46:46,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591736579] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:46:46,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293299673] [2023-11-29 01:46:46,692 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 01:46:46,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:46:46,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:46:46,694 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:46:46,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 01:46:46,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:46:46,756 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 01:46:46,757 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:46:46,794 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-29 01:46:46,794 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:46:46,862 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-29 01:46:46,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293299673] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:46:46,862 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:46:46,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 6 [2023-11-29 01:46:46,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177968574] [2023-11-29 01:46:46,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:46:46,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 01:46:46,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:46:46,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 01:46:46,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-29 01:46:46,864 INFO L87 Difference]: Start difference. First operand 135 states and 182 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:46:47,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:46:47,005 INFO L93 Difference]: Finished difference Result 150 states and 201 transitions. [2023-11-29 01:46:47,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 01:46:47,006 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-11-29 01:46:47,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:46:47,007 INFO L225 Difference]: With dead ends: 150 [2023-11-29 01:46:47,007 INFO L226 Difference]: Without dead ends: 137 [2023-11-29 01:46:47,007 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 42 SyntacticMatches, 8 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-29 01:46:47,008 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 21 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:46:47,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 40 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 01:46:47,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2023-11-29 01:46:47,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2023-11-29 01:46:47,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.3455882352941178) internal successors, (183), 136 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:46:47,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 183 transitions. [2023-11-29 01:46:47,073 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 183 transitions. Word has length 24 [2023-11-29 01:46:47,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:46:47,074 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 183 transitions. [2023-11-29 01:46:47,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:46:47,074 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 183 transitions. [2023-11-29 01:46:47,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-29 01:46:47,074 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:46:47,074 INFO L195 NwaCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:46:47,079 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 01:46:47,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:46:47,275 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:46:47,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:46:47,276 INFO L85 PathProgramCache]: Analyzing trace with hash 677068581, now seen corresponding path program 4 times [2023-11-29 01:46:47,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:46:47,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239964467] [2023-11-29 01:46:47,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:46:47,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:46:47,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:46:47,442 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-29 01:46:47,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:46:47,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239964467] [2023-11-29 01:46:47,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239964467] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:46:47,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691870639] [2023-11-29 01:46:47,443 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 01:46:47,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:46:47,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:46:47,444 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:46:47,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 01:46:47,498 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 01:46:47,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:46:47,499 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-29 01:46:47,501 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:46:47,569 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-29 01:46:47,570 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:46:47,704 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-29 01:46:47,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691870639] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:46:47,704 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:46:47,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 8] total 22 [2023-11-29 01:46:47,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124279196] [2023-11-29 01:46:47,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:46:47,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-29 01:46:47,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:46:47,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-29 01:46:47,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2023-11-29 01:46:47,706 INFO L87 Difference]: Start difference. First operand 137 states and 183 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:46:48,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:46:48,925 INFO L93 Difference]: Finished difference Result 309 states and 408 transitions. [2023-11-29 01:46:48,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-11-29 01:46:48,926 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-11-29 01:46:48,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:46:48,927 INFO L225 Difference]: With dead ends: 309 [2023-11-29 01:46:48,927 INFO L226 Difference]: Without dead ends: 243 [2023-11-29 01:46:48,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 607 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=318, Invalid=2438, Unknown=0, NotChecked=0, Total=2756 [2023-11-29 01:46:48,929 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 117 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 771 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 771 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 01:46:48,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 501 Invalid, 854 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 771 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 01:46:48,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2023-11-29 01:46:48,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 146. [2023-11-29 01:46:48,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 1.3172413793103448) internal successors, (191), 145 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:46:48,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 191 transitions. [2023-11-29 01:46:48,984 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 191 transitions. Word has length 24 [2023-11-29 01:46:48,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:46:48,984 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 191 transitions. [2023-11-29 01:46:48,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:46:48,985 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 191 transitions. [2023-11-29 01:46:48,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-29 01:46:48,985 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:46:48,985 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:46:48,990 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 01:46:49,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:46:49,186 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:46:49,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:46:49,187 INFO L85 PathProgramCache]: Analyzing trace with hash 118165685, now seen corresponding path program 5 times [2023-11-29 01:46:49,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:46:49,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231789086] [2023-11-29 01:46:49,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:46:49,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:46:49,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:46:49,348 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-29 01:46:49,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:46:49,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231789086] [2023-11-29 01:46:49,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231789086] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:46:49,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768093445] [2023-11-29 01:46:49,349 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 01:46:49,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:46:49,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:46:49,350 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:46:49,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 01:46:49,583 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-29 01:46:49,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:46:49,585 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 41 conjunts are in the unsatisfiable core [2023-11-29 01:46:49,586 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:46:49,664 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-29 01:46:49,664 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:46:49,921 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-29 01:46:49,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768093445] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:46:49,922 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:46:49,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 14] total 30 [2023-11-29 01:46:49,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685027077] [2023-11-29 01:46:49,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:46:49,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-29 01:46:49,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:46:49,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-29 01:46:49,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2023-11-29 01:46:49,924 INFO L87 Difference]: Start difference. First operand 146 states and 191 transitions. Second operand has 30 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 30 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) [2023-11-29 01:46:52,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:46:52,127 INFO L93 Difference]: Finished difference Result 288 states and 377 transitions. [2023-11-29 01:46:52,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-11-29 01:46:52,128 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 30 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 25 [2023-11-29 01:46:52,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:46:52,129 INFO L225 Difference]: With dead ends: 288 [2023-11-29 01:46:52,130 INFO L226 Difference]: Without dead ends: 243 [2023-11-29 01:46:52,131 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=400, Invalid=3022, Unknown=0, NotChecked=0, Total=3422 [2023-11-29 01:46:52,132 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 155 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 740 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 01:46:52,132 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 448 Invalid, 832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 740 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 01:46:52,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2023-11-29 01:46:52,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 150. [2023-11-29 01:46:52,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 1.3221476510067114) internal successors, (197), 149 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:46:52,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 197 transitions. [2023-11-29 01:46:52,195 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 197 transitions. Word has length 25 [2023-11-29 01:46:52,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:46:52,196 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 197 transitions. [2023-11-29 01:46:52,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 30 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) [2023-11-29 01:46:52,196 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 197 transitions. [2023-11-29 01:46:52,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-29 01:46:52,197 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:46:52,197 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:46:52,201 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-29 01:46:52,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:46:52,397 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:46:52,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:46:52,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1070841546, now seen corresponding path program 8 times [2023-11-29 01:46:52,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:46:52,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318844483] [2023-11-29 01:46:52,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:46:52,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:46:52,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:46:52,509 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-29 01:46:52,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:46:52,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318844483] [2023-11-29 01:46:52,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318844483] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:46:52,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027699695] [2023-11-29 01:46:52,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 01:46:52,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:46:52,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:46:52,511 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:46:52,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 01:46:52,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 01:46:52,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:46:52,562 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 01:46:52,563 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:46:52,595 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-29 01:46:52,596 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:46:52,662 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-29 01:46:52,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027699695] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:46:52,662 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:46:52,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 6 [2023-11-29 01:46:52,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353132979] [2023-11-29 01:46:52,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:46:52,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 01:46:52,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:46:52,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 01:46:52,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-29 01:46:52,664 INFO L87 Difference]: Start difference. First operand 150 states and 197 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:46:52,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:46:52,782 INFO L93 Difference]: Finished difference Result 171 states and 228 transitions. [2023-11-29 01:46:52,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 01:46:52,782 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-11-29 01:46:52,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:46:52,783 INFO L225 Difference]: With dead ends: 171 [2023-11-29 01:46:52,783 INFO L226 Difference]: Without dead ends: 138 [2023-11-29 01:46:52,784 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 47 SyntacticMatches, 9 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-29 01:46:52,784 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 5 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:46:52,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 42 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 01:46:52,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2023-11-29 01:46:52,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2023-11-29 01:46:52,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 1.3357664233576643) internal successors, (183), 137 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:46:52,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 183 transitions. [2023-11-29 01:46:52,845 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 183 transitions. Word has length 26 [2023-11-29 01:46:52,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:46:52,845 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 183 transitions. [2023-11-29 01:46:52,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:46:52,845 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 183 transitions. [2023-11-29 01:46:52,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-29 01:46:52,846 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:46:52,846 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:46:52,851 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 01:46:53,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-29 01:46:53,047 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:46:53,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:46:53,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1584003690, now seen corresponding path program 5 times [2023-11-29 01:46:53,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:46:53,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296776517] [2023-11-29 01:46:53,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:46:53,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:46:53,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:46:53,266 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:46:53,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:46:53,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296776517] [2023-11-29 01:46:53,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296776517] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:46:53,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446404573] [2023-11-29 01:46:53,266 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 01:46:53,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:46:53,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:46:53,267 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:46:53,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 01:46:53,418 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-29 01:46:53,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:46:53,420 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-29 01:46:53,421 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:46:53,556 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:46:53,556 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:46:53,849 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-29 01:46:53,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446404573] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:46:53,849 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:46:53,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 18, 13] total 33 [2023-11-29 01:46:53,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932530113] [2023-11-29 01:46:53,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:46:53,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-29 01:46:53,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:46:53,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-29 01:46:53,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=827, Unknown=0, NotChecked=0, Total=1056 [2023-11-29 01:46:53,852 INFO L87 Difference]: Start difference. First operand 138 states and 183 transitions. Second operand has 33 states, 33 states have (on average 1.696969696969697) internal successors, (56), 33 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:46:55,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:46:55,964 INFO L93 Difference]: Finished difference Result 327 states and 489 transitions. [2023-11-29 01:46:55,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2023-11-29 01:46:55,965 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.696969696969697) internal successors, (56), 33 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-11-29 01:46:55,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:46:55,966 INFO L225 Difference]: With dead ends: 327 [2023-11-29 01:46:55,967 INFO L226 Difference]: Without dead ends: 290 [2023-11-29 01:46:55,969 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1690 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1508, Invalid=4812, Unknown=0, NotChecked=0, Total=6320 [2023-11-29 01:46:55,970 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 234 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 904 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 1130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 904 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 01:46:55,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 216 Invalid, 1130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 904 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 01:46:55,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2023-11-29 01:46:56,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 168. [2023-11-29 01:46:56,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.3892215568862276) internal successors, (232), 167 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:46:56,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 232 transitions. [2023-11-29 01:46:56,090 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 232 transitions. Word has length 26 [2023-11-29 01:46:56,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:46:56,090 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 232 transitions. [2023-11-29 01:46:56,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.696969696969697) internal successors, (56), 33 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:46:56,090 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 232 transitions. [2023-11-29 01:46:56,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-29 01:46:56,091 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:46:56,091 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:46:56,096 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-29 01:46:56,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-29 01:46:56,292 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:46:56,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:46:56,292 INFO L85 PathProgramCache]: Analyzing trace with hash 2124387075, now seen corresponding path program 9 times [2023-11-29 01:46:56,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:46:56,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36090067] [2023-11-29 01:46:56,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:46:56,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:46:56,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:46:56,480 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-29 01:46:56,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:46:56,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36090067] [2023-11-29 01:46:56,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36090067] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:46:56,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611609814] [2023-11-29 01:46:56,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 01:46:56,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:46:56,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:46:56,482 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:46:56,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 01:46:56,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 01:46:56,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:46:56,544 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 01:46:56,546 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:46:56,639 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-29 01:46:56,639 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:46:56,690 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-29 01:46:56,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611609814] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:46:56,691 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:46:56,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 15 [2023-11-29 01:46:56,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105559797] [2023-11-29 01:46:56,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:46:56,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 01:46:56,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:46:56,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 01:46:56,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2023-11-29 01:46:56,693 INFO L87 Difference]: Start difference. First operand 168 states and 232 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:46:56,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:46:56,991 INFO L93 Difference]: Finished difference Result 212 states and 295 transitions. [2023-11-29 01:46:56,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 01:46:56,992 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-11-29 01:46:56,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:46:56,993 INFO L225 Difference]: With dead ends: 212 [2023-11-29 01:46:56,993 INFO L226 Difference]: Without dead ends: 195 [2023-11-29 01:46:56,993 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2023-11-29 01:46:56,994 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 40 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:46:56,994 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 55 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:46:56,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2023-11-29 01:46:57,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2023-11-29 01:46:57,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 1.3711340206185567) internal successors, (266), 194 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:46:57,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 266 transitions. [2023-11-29 01:46:57,102 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 266 transitions. Word has length 27 [2023-11-29 01:46:57,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:46:57,102 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 266 transitions. [2023-11-29 01:46:57,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:46:57,103 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 266 transitions. [2023-11-29 01:46:57,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-29 01:46:57,103 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:46:57,103 INFO L195 NwaCegarLoop]: trace histogram [8, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:46:57,107 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-29 01:46:57,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-29 01:46:57,304 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:46:57,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:46:57,304 INFO L85 PathProgramCache]: Analyzing trace with hash -543309725, now seen corresponding path program 6 times [2023-11-29 01:46:57,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:46:57,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661453089] [2023-11-29 01:46:57,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:46:57,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:46:57,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:46:57,534 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 01:46:57,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:46:57,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661453089] [2023-11-29 01:46:57,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661453089] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:46:57,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726122136] [2023-11-29 01:46:57,535 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 01:46:57,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:46:57,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:46:57,536 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:46:57,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-29 01:46:57,662 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-11-29 01:46:57,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:46:57,664 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-29 01:46:57,665 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:46:57,829 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 20 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 01:46:57,829 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:46:58,035 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 20 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 01:46:58,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726122136] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:46:58,036 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:46:58,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8, 8] total 23 [2023-11-29 01:46:58,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963878850] [2023-11-29 01:46:58,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:46:58,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 01:46:58,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:46:58,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 01:46:58,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=458, Unknown=0, NotChecked=0, Total=506 [2023-11-29 01:46:58,037 INFO L87 Difference]: Start difference. First operand 195 states and 266 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:47:03,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:47:03,625 INFO L93 Difference]: Finished difference Result 400 states and 543 transitions. [2023-11-29 01:47:03,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2023-11-29 01:47:03,625 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-11-29 01:47:03,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:47:03,627 INFO L225 Difference]: With dead ends: 400 [2023-11-29 01:47:03,627 INFO L226 Difference]: Without dead ends: 315 [2023-11-29 01:47:03,630 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 47 SyntacticMatches, 10 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1914 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=697, Invalid=6443, Unknown=0, NotChecked=0, Total=7140 [2023-11-29 01:47:03,631 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 223 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 1415 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 1511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 1415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:47:03,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 476 Invalid, 1511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 1415 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-29 01:47:03,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2023-11-29 01:47:03,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 205. [2023-11-29 01:47:03,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 1.338235294117647) internal successors, (273), 204 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:47:03,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 273 transitions. [2023-11-29 01:47:03,751 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 273 transitions. Word has length 27 [2023-11-29 01:47:03,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:47:03,751 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 273 transitions. [2023-11-29 01:47:03,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:47:03,751 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 273 transitions. [2023-11-29 01:47:03,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-29 01:47:03,752 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:47:03,752 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:47:03,756 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-29 01:47:03,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-29 01:47:03,953 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:47:03,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:47:03,953 INFO L85 PathProgramCache]: Analyzing trace with hash 508799203, now seen corresponding path program 6 times [2023-11-29 01:47:03,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:47:03,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510849525] [2023-11-29 01:47:03,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:47:03,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:47:03,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:47:04,129 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-29 01:47:04,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:47:04,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510849525] [2023-11-29 01:47:04,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510849525] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:47:04,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088488522] [2023-11-29 01:47:04,130 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 01:47:04,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:47:04,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:47:04,131 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:47:04,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-29 01:47:04,240 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-29 01:47:04,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:47:04,241 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-29 01:47:04,243 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:47:04,374 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-29 01:47:04,374 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:47:04,588 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-29 01:47:04,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088488522] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:47:04,588 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:47:04,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 8] total 21 [2023-11-29 01:47:04,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80168855] [2023-11-29 01:47:04,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:47:04,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-29 01:47:04,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:47:04,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-29 01:47:04,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=376, Unknown=0, NotChecked=0, Total=420 [2023-11-29 01:47:04,590 INFO L87 Difference]: Start difference. First operand 205 states and 273 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:47:07,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:47:07,593 INFO L93 Difference]: Finished difference Result 287 states and 372 transitions. [2023-11-29 01:47:07,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-11-29 01:47:07,593 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2023-11-29 01:47:07,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:47:07,594 INFO L225 Difference]: With dead ends: 287 [2023-11-29 01:47:07,594 INFO L226 Difference]: Without dead ends: 251 [2023-11-29 01:47:07,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 49 SyntacticMatches, 10 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1288 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=516, Invalid=4596, Unknown=0, NotChecked=0, Total=5112 [2023-11-29 01:47:07,596 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 133 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 981 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 1066 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 981 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 01:47:07,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 321 Invalid, 1066 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 981 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 01:47:07,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2023-11-29 01:47:07,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 199. [2023-11-29 01:47:07,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 1.3383838383838385) internal successors, (265), 198 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) [2023-11-29 01:47:07,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 265 transitions. [2023-11-29 01:47:07,720 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 265 transitions. Word has length 29 [2023-11-29 01:47:07,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:47:07,720 INFO L495 AbstractCegarLoop]: Abstraction has 199 states and 265 transitions. [2023-11-29 01:47:07,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:47:07,721 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 265 transitions. [2023-11-29 01:47:07,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-29 01:47:07,721 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:47:07,721 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:47:07,726 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-11-29 01:47:07,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-29 01:47:07,922 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:47:07,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:47:07,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1998985234, now seen corresponding path program 7 times [2023-11-29 01:47:07,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:47:07,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074756372] [2023-11-29 01:47:07,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:47:07,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:47:07,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:47:08,175 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:47:08,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:47:08,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074756372] [2023-11-29 01:47:08,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074756372] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:47:08,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110720684] [2023-11-29 01:47:08,176 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 01:47:08,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:47:08,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:47:08,177 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:47:08,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-29 01:47:08,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:47:08,230 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-29 01:47:08,231 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:47:08,413 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-29 01:47:08,413 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:47:08,661 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-29 01:47:08,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110720684] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:47:08,661 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:47:08,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 24 [2023-11-29 01:47:08,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49808641] [2023-11-29 01:47:08,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:47:08,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-29 01:47:08,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:47:08,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-29 01:47:08,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=505, Unknown=0, NotChecked=0, Total=552 [2023-11-29 01:47:08,663 INFO L87 Difference]: Start difference. First operand 199 states and 265 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:47:27,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:47:27,037 INFO L93 Difference]: Finished difference Result 328 states and 457 transitions. [2023-11-29 01:47:27,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2023-11-29 01:47:27,037 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2023-11-29 01:47:27,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:47:27,039 INFO L225 Difference]: With dead ends: 328 [2023-11-29 01:47:27,039 INFO L226 Difference]: Without dead ends: 292 [2023-11-29 01:47:27,042 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 44 SyntacticMatches, 12 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5392 ImplicationChecksByTransitivity, 16.4s TimeCoverageRelationStatistics Valid=1445, Invalid=15067, Unknown=0, NotChecked=0, Total=16512 [2023-11-29 01:47:27,043 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 239 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 1866 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 2028 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 1866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:47:27,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [239 Valid, 128 Invalid, 2028 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 1866 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-11-29 01:47:27,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2023-11-29 01:47:27,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 221. [2023-11-29 01:47:27,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 1.3227272727272728) internal successors, (291), 220 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:47:27,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 291 transitions. [2023-11-29 01:47:27,181 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 291 transitions. Word has length 29 [2023-11-29 01:47:27,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:47:27,182 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 291 transitions. [2023-11-29 01:47:27,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:47:27,182 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 291 transitions. [2023-11-29 01:47:27,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-29 01:47:27,182 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:47:27,183 INFO L195 NwaCegarLoop]: trace histogram [9, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:47:27,187 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-11-29 01:47:27,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-29 01:47:27,383 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:47:27,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:47:27,384 INFO L85 PathProgramCache]: Analyzing trace with hash 529063012, now seen corresponding path program 10 times [2023-11-29 01:47:27,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:47:27,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516889649] [2023-11-29 01:47:27,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:47:27,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:47:27,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:47:27,597 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 01:47:27,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:47:27,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516889649] [2023-11-29 01:47:27,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516889649] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:47:27,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741497651] [2023-11-29 01:47:27,598 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 01:47:27,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:47:27,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:47:27,599 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:47:27,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-29 01:47:27,645 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 01:47:27,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:47:27,646 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-29 01:47:27,647 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:47:27,705 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-29 01:47:27,705 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:47:27,835 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-11-29 01:47:27,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741497651] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:47:27,836 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:47:27,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 8] total 25 [2023-11-29 01:47:27,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787763527] [2023-11-29 01:47:27,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:47:27,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-29 01:47:27,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:47:27,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-29 01:47:27,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=466, Unknown=0, NotChecked=0, Total=600 [2023-11-29 01:47:27,837 INFO L87 Difference]: Start difference. First operand 221 states and 291 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:47:28,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:47:28,981 INFO L93 Difference]: Finished difference Result 589 states and 774 transitions. [2023-11-29 01:47:28,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-29 01:47:28,981 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 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 29 [2023-11-29 01:47:28,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:47:28,984 INFO L225 Difference]: With dead ends: 589 [2023-11-29 01:47:28,984 INFO L226 Difference]: Without dead ends: 509 [2023-11-29 01:47:28,984 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=370, Invalid=1112, Unknown=0, NotChecked=0, Total=1482 [2023-11-29 01:47:28,985 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 191 mSDsluCounter, 539 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 01:47:28,985 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 596 Invalid, 828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 749 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 01:47:28,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2023-11-29 01:47:29,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 243. [2023-11-29 01:47:29,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 1.2933884297520661) internal successors, (313), 242 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:47:29,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 313 transitions. [2023-11-29 01:47:29,141 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 313 transitions. Word has length 29 [2023-11-29 01:47:29,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:47:29,141 INFO L495 AbstractCegarLoop]: Abstraction has 243 states and 313 transitions. [2023-11-29 01:47:29,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:47:29,142 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 313 transitions. [2023-11-29 01:47:29,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-29 01:47:29,142 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:47:29,142 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:47:29,147 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-11-29 01:47:29,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:47:29,343 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:47:29,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:47:29,344 INFO L85 PathProgramCache]: Analyzing trace with hash 982104067, now seen corresponding path program 11 times [2023-11-29 01:47:29,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:47:29,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347710880] [2023-11-29 01:47:29,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:47:29,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:47:29,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:47:29,503 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 01:47:29,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:47:29,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347710880] [2023-11-29 01:47:29,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347710880] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:47:29,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976003300] [2023-11-29 01:47:29,504 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 01:47:29,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:47:29,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:47:29,505 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:47:29,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-29 01:47:29,662 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-29 01:47:29,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:47:29,664 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-29 01:47:29,665 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:47:29,726 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 01:47:29,726 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:47:29,845 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 01:47:29,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976003300] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:47:29,845 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:47:29,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 14 [2023-11-29 01:47:29,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957638864] [2023-11-29 01:47:29,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:47:29,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 01:47:29,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:47:29,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 01:47:29,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2023-11-29 01:47:29,846 INFO L87 Difference]: Start difference. First operand 243 states and 313 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:47:30,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:47:30,888 INFO L93 Difference]: Finished difference Result 418 states and 592 transitions. [2023-11-29 01:47:30,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-29 01:47:30,889 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2023-11-29 01:47:30,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:47:30,891 INFO L225 Difference]: With dead ends: 418 [2023-11-29 01:47:30,891 INFO L226 Difference]: Without dead ends: 374 [2023-11-29 01:47:30,892 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 55 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=213, Invalid=543, Unknown=0, NotChecked=0, Total=756 [2023-11-29 01:47:30,892 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 94 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:47:30,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 92 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:47:30,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2023-11-29 01:47:31,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 359. [2023-11-29 01:47:31,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 358 states have (on average 1.3798882681564246) internal successors, (494), 358 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:47:31,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 494 transitions. [2023-11-29 01:47:31,202 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 494 transitions. Word has length 31 [2023-11-29 01:47:31,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:47:31,202 INFO L495 AbstractCegarLoop]: Abstraction has 359 states and 494 transitions. [2023-11-29 01:47:31,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:47:31,203 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 494 transitions. [2023-11-29 01:47:31,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-29 01:47:31,203 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:47:31,203 INFO L195 NwaCegarLoop]: trace histogram [10, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:47:31,209 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-11-29 01:47:31,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:47:31,404 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:47:31,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:47:31,404 INFO L85 PathProgramCache]: Analyzing trace with hash 38476852, now seen corresponding path program 12 times [2023-11-29 01:47:31,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:47:31,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007775614] [2023-11-29 01:47:31,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:47:31,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:47:31,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:47:31,614 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-29 01:47:31,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:47:31,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007775614] [2023-11-29 01:47:31,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007775614] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:47:31,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483549451] [2023-11-29 01:47:31,615 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 01:47:31,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:47:31,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:47:31,616 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:47:31,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-29 01:47:31,702 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-11-29 01:47:31,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:47:31,704 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 41 conjunts are in the unsatisfiable core [2023-11-29 01:47:31,705 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:47:31,861 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-11-29 01:47:31,861 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:47:32,312 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-29 01:47:32,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483549451] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:47:32,312 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:47:32,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 15] total 38 [2023-11-29 01:47:32,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970010721] [2023-11-29 01:47:32,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:47:32,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-11-29 01:47:32,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:47:32,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-11-29 01:47:32,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1261, Unknown=0, NotChecked=0, Total=1406 [2023-11-29 01:47:32,313 INFO L87 Difference]: Start difference. First operand 359 states and 494 transitions. Second operand has 38 states, 38 states have (on average 1.6842105263157894) internal successors, (64), 38 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) [2023-11-29 01:47:41,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:47:41,972 INFO L93 Difference]: Finished difference Result 843 states and 1188 transitions. [2023-11-29 01:47:41,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2023-11-29 01:47:41,972 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.6842105263157894) internal successors, (64), 38 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 31 [2023-11-29 01:47:41,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:47:41,975 INFO L225 Difference]: With dead ends: 843 [2023-11-29 01:47:41,975 INFO L226 Difference]: Without dead ends: 665 [2023-11-29 01:47:41,978 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6620 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=2440, Invalid=20512, Unknown=0, NotChecked=0, Total=22952 [2023-11-29 01:47:41,978 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 205 mSDsluCounter, 898 mSDsCounter, 0 mSdLazyCounter, 2850 mSolverCounterSat, 485 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 948 SdHoareTripleChecker+Invalid, 3335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 485 IncrementalHoareTripleChecker+Valid, 2850 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:47:41,979 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 948 Invalid, 3335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [485 Valid, 2850 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-11-29 01:47:41,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2023-11-29 01:47:42,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 421. [2023-11-29 01:47:42,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 420 states have (on average 1.4476190476190476) internal successors, (608), 420 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:47:42,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 608 transitions. [2023-11-29 01:47:42,269 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 608 transitions. Word has length 31 [2023-11-29 01:47:42,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:47:42,270 INFO L495 AbstractCegarLoop]: Abstraction has 421 states and 608 transitions. [2023-11-29 01:47:42,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.6842105263157894) internal successors, (64), 38 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) [2023-11-29 01:47:42,270 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 608 transitions. [2023-11-29 01:47:42,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-29 01:47:42,270 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:47:42,271 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:47:42,276 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-11-29 01:47:42,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-11-29 01:47:42,471 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:47:42,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:47:42,472 INFO L85 PathProgramCache]: Analyzing trace with hash 2049814678, now seen corresponding path program 8 times [2023-11-29 01:47:42,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:47:42,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307217219] [2023-11-29 01:47:42,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:47:42,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:47:42,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:47:42,780 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:47:42,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:47:42,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307217219] [2023-11-29 01:47:42,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307217219] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:47:42,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708260059] [2023-11-29 01:47:42,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 01:47:42,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:47:42,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:47:42,782 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:47:42,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-29 01:47:42,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 01:47:42,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:47:42,834 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-29 01:47:42,835 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:47:43,029 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 7 proven. 49 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-11-29 01:47:43,029 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:47:43,351 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 7 proven. 49 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-11-29 01:47:43,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708260059] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:47:43,351 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:47:43,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 10, 10] total 27 [2023-11-29 01:47:43,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753290712] [2023-11-29 01:47:43,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:47:43,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-29 01:47:43,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:47:43,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-29 01:47:43,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=649, Unknown=0, NotChecked=0, Total=702 [2023-11-29 01:47:43,353 INFO L87 Difference]: Start difference. First operand 421 states and 608 transitions. Second operand has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 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) [2023-11-29 01:48:14,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:48:14,365 INFO L93 Difference]: Finished difference Result 623 states and 906 transitions. [2023-11-29 01:48:14,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2023-11-29 01:48:14,365 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 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 32 [2023-11-29 01:48:14,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:48:14,367 INFO L225 Difference]: With dead ends: 623 [2023-11-29 01:48:14,367 INFO L226 Difference]: Without dead ends: 534 [2023-11-29 01:48:14,369 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 48 SyntacticMatches, 14 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5960 ImplicationChecksByTransitivity, 27.5s TimeCoverageRelationStatistics Valid=1584, Invalid=17048, Unknown=0, NotChecked=0, Total=18632 [2023-11-29 01:48:14,369 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 258 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 2227 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 2420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 2227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2023-11-29 01:48:14,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [258 Valid, 154 Invalid, 2420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 2227 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2023-11-29 01:48:14,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2023-11-29 01:48:14,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 435. [2023-11-29 01:48:14,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 434 states have (on average 1.4170506912442395) internal successors, (615), 434 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:48:14,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 615 transitions. [2023-11-29 01:48:14,674 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 615 transitions. Word has length 32 [2023-11-29 01:48:14,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:48:14,674 INFO L495 AbstractCegarLoop]: Abstraction has 435 states and 615 transitions. [2023-11-29 01:48:14,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 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) [2023-11-29 01:48:14,675 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 615 transitions. [2023-11-29 01:48:14,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-29 01:48:14,675 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:48:14,675 INFO L195 NwaCegarLoop]: trace histogram [11, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:48:14,679 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-11-29 01:48:14,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-11-29 01:48:14,876 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:48:14,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:48:14,876 INFO L85 PathProgramCache]: Analyzing trace with hash 65669607, now seen corresponding path program 7 times [2023-11-29 01:48:14,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:48:14,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658269536] [2023-11-29 01:48:14,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:48:14,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:48:14,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:48:15,088 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-29 01:48:15,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:48:15,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658269536] [2023-11-29 01:48:15,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658269536] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:48:15,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145540204] [2023-11-29 01:48:15,089 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 01:48:15,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:48:15,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:48:15,090 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:48:15,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-29 01:48:15,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:48:15,146 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-29 01:48:15,148 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:48:15,234 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-29 01:48:15,234 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:48:15,435 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2023-11-29 01:48:15,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145540204] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:48:15,435 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:48:15,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 10] total 30 [2023-11-29 01:48:15,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804362557] [2023-11-29 01:48:15,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:48:15,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-29 01:48:15,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:48:15,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-29 01:48:15,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=755, Unknown=0, NotChecked=0, Total=870 [2023-11-29 01:48:15,437 INFO L87 Difference]: Start difference. First operand 435 states and 615 transitions. Second operand has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:48:19,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:48:19,226 INFO L93 Difference]: Finished difference Result 891 states and 1259 transitions. [2023-11-29 01:48:19,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2023-11-29 01:48:19,226 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2023-11-29 01:48:19,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:48:19,229 INFO L225 Difference]: With dead ends: 891 [2023-11-29 01:48:19,229 INFO L226 Difference]: Without dead ends: 708 [2023-11-29 01:48:19,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2158 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=644, Invalid=7546, Unknown=0, NotChecked=0, Total=8190 [2023-11-29 01:48:19,231 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 172 mSDsluCounter, 941 mSDsCounter, 0 mSdLazyCounter, 1426 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 1006 SdHoareTripleChecker+Invalid, 1590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 1426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-29 01:48:19,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 1006 Invalid, 1590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 1426 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-29 01:48:19,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2023-11-29 01:48:19,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 478. [2023-11-29 01:48:19,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 477 states have (on average 1.3815513626834381) internal successors, (659), 477 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:48:19,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 659 transitions. [2023-11-29 01:48:19,542 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 659 transitions. Word has length 32 [2023-11-29 01:48:19,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:48:19,543 INFO L495 AbstractCegarLoop]: Abstraction has 478 states and 659 transitions. [2023-11-29 01:48:19,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:48:19,543 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 659 transitions. [2023-11-29 01:48:19,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-29 01:48:19,544 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:48:19,544 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:48:19,548 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-11-29 01:48:19,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:48:19,745 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:48:19,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:48:19,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1554749943, now seen corresponding path program 8 times [2023-11-29 01:48:19,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:48:19,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297131041] [2023-11-29 01:48:19,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:48:19,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:48:19,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:48:19,973 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-11-29 01:48:19,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:48:19,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297131041] [2023-11-29 01:48:19,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297131041] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:48:19,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534319907] [2023-11-29 01:48:19,973 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 01:48:19,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:48:19,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:48:19,974 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:48:19,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-29 01:48:20,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 01:48:20,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:48:20,032 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 59 conjunts are in the unsatisfiable core [2023-11-29 01:48:20,033 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:48:20,175 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-11-29 01:48:20,175 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:48:20,750 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-29 01:48:20,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534319907] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:48:20,750 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:48:20,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 20] total 45 [2023-11-29 01:48:20,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159207176] [2023-11-29 01:48:20,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:48:20,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-11-29 01:48:20,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:48:20,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-11-29 01:48:20,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=1731, Unknown=0, NotChecked=0, Total=1980 [2023-11-29 01:48:20,752 INFO L87 Difference]: Start difference. First operand 478 states and 659 transitions. Second operand has 45 states, 45 states have (on average 1.3777777777777778) internal successors, (62), 45 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:48:42,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:48:42,382 INFO L93 Difference]: Finished difference Result 815 states and 1079 transitions. [2023-11-29 01:48:42,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2023-11-29 01:48:42,383 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.3777777777777778) internal successors, (62), 45 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2023-11-29 01:48:42,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:48:42,386 INFO L225 Difference]: With dead ends: 815 [2023-11-29 01:48:42,386 INFO L226 Difference]: Without dead ends: 688 [2023-11-29 01:48:42,386 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3406 ImplicationChecksByTransitivity, 17.8s TimeCoverageRelationStatistics Valid=1088, Invalid=12252, Unknown=0, NotChecked=0, Total=13340 [2023-11-29 01:48:42,387 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 245 mSDsluCounter, 1212 mSDsCounter, 0 mSdLazyCounter, 2252 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 1271 SdHoareTripleChecker+Invalid, 2482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 2252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2023-11-29 01:48:42,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [245 Valid, 1271 Invalid, 2482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 2252 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2023-11-29 01:48:42,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2023-11-29 01:48:42,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 508. [2023-11-29 01:48:42,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 507 states have (on average 1.3629191321499015) internal successors, (691), 507 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:48:42,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 691 transitions. [2023-11-29 01:48:42,795 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 691 transitions. Word has length 34 [2023-11-29 01:48:42,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:48:42,795 INFO L495 AbstractCegarLoop]: Abstraction has 508 states and 691 transitions. [2023-11-29 01:48:42,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.3777777777777778) internal successors, (62), 45 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:48:42,795 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 691 transitions. [2023-11-29 01:48:42,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-29 01:48:42,796 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:48:42,796 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:48:42,801 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-11-29 01:48:42,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-11-29 01:48:42,997 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:48:42,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:48:42,997 INFO L85 PathProgramCache]: Analyzing trace with hash -2049057390, now seen corresponding path program 9 times [2023-11-29 01:48:42,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:48:42,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903597216] [2023-11-29 01:48:42,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:48:42,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:48:43,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:48:43,293 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:48:43,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:48:43,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903597216] [2023-11-29 01:48:43,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903597216] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:48:43,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986675471] [2023-11-29 01:48:43,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 01:48:43,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:48:43,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:48:43,295 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:48:43,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-29 01:48:43,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-11-29 01:48:43,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:48:43,539 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-29 01:48:43,540 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:48:43,792 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 8 proven. 64 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-11-29 01:48:43,792 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:48:44,188 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 8 proven. 64 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-11-29 01:48:44,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986675471] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:48:44,188 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:48:44,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 11, 11] total 30 [2023-11-29 01:48:44,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424867365] [2023-11-29 01:48:44,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:48:44,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-29 01:48:44,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:48:44,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-29 01:48:44,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=811, Unknown=0, NotChecked=0, Total=870 [2023-11-29 01:48:44,190 INFO L87 Difference]: Start difference. First operand 508 states and 691 transitions. Second operand has 30 states, 30 states have (on average 2.0) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:50:11,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:50:11,847 INFO L93 Difference]: Finished difference Result 705 states and 985 transitions. [2023-11-29 01:50:11,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2023-11-29 01:50:11,848 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.0) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2023-11-29 01:50:11,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:50:11,850 INFO L225 Difference]: With dead ends: 705 [2023-11-29 01:50:11,850 INFO L226 Difference]: Without dead ends: 649 [2023-11-29 01:50:11,852 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 52 SyntacticMatches, 16 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12368 ImplicationChecksByTransitivity, 78.9s TimeCoverageRelationStatistics Valid=2583, Invalid=32573, Unknown=0, NotChecked=0, Total=35156 [2023-11-29 01:50:11,852 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 514 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 3545 mSolverCounterSat, 282 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 514 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 3827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 282 IncrementalHoareTripleChecker+Valid, 3545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.5s IncrementalHoareTripleChecker+Time [2023-11-29 01:50:11,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [514 Valid, 144 Invalid, 3827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [282 Valid, 3545 Invalid, 0 Unknown, 0 Unchecked, 8.5s Time] [2023-11-29 01:50:11,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2023-11-29 01:50:12,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 520. [2023-11-29 01:50:12,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 519 states have (on average 1.3506743737957612) internal successors, (701), 519 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:50:12,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 701 transitions. [2023-11-29 01:50:12,259 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 701 transitions. Word has length 35 [2023-11-29 01:50:12,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:50:12,259 INFO L495 AbstractCegarLoop]: Abstraction has 520 states and 701 transitions. [2023-11-29 01:50:12,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.0) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:50:12,259 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 701 transitions. [2023-11-29 01:50:12,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-29 01:50:12,260 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:50:12,260 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:50:12,265 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-11-29 01:50:12,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:50:12,461 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:50:12,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:50:12,462 INFO L85 PathProgramCache]: Analyzing trace with hash -264677034, now seen corresponding path program 13 times [2023-11-29 01:50:12,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:50:12,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457121608] [2023-11-29 01:50:12,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:50:12,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:50:12,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:50:12,642 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 01:50:12,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:50:12,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457121608] [2023-11-29 01:50:12,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457121608] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:50:12,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972186343] [2023-11-29 01:50:12,642 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 01:50:12,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:50:12,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:50:12,644 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:50:12,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-11-29 01:50:12,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:50:12,698 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-29 01:50:12,699 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:50:12,741 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 01:50:12,742 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:50:12,828 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-29 01:50:12,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972186343] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:50:12,828 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:50:12,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 8 [2023-11-29 01:50:12,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248818069] [2023-11-29 01:50:12,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:50:12,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 01:50:12,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:50:12,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 01:50:12,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-29 01:50:12,830 INFO L87 Difference]: Start difference. First operand 520 states and 701 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:50:13,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:50:13,305 INFO L93 Difference]: Finished difference Result 567 states and 773 transitions. [2023-11-29 01:50:13,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 01:50:13,306 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2023-11-29 01:50:13,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:50:13,308 INFO L225 Difference]: With dead ends: 567 [2023-11-29 01:50:13,308 INFO L226 Difference]: Without dead ends: 504 [2023-11-29 01:50:13,308 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 62 SyntacticMatches, 15 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-29 01:50:13,308 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 8 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:50:13,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 78 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:50:13,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2023-11-29 01:50:13,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 504. [2023-11-29 01:50:13,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 503 states have (on average 1.3578528827037772) internal successors, (683), 503 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:50:13,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 683 transitions. [2023-11-29 01:50:13,743 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 683 transitions. Word has length 36 [2023-11-29 01:50:13,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:50:13,743 INFO L495 AbstractCegarLoop]: Abstraction has 504 states and 683 transitions. [2023-11-29 01:50:13,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:50:13,743 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 683 transitions. [2023-11-29 01:50:13,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-29 01:50:13,745 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:50:13,745 INFO L195 NwaCegarLoop]: trace histogram [12, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:50:13,749 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2023-11-29 01:50:13,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:50:13,946 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:50:13,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:50:13,946 INFO L85 PathProgramCache]: Analyzing trace with hash -2046252361, now seen corresponding path program 14 times [2023-11-29 01:50:13,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:50:13,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723233446] [2023-11-29 01:50:13,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:50:13,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:50:13,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:50:14,175 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-11-29 01:50:14,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:50:14,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723233446] [2023-11-29 01:50:14,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723233446] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:50:14,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607815285] [2023-11-29 01:50:14,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 01:50:14,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:50:14,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:50:14,177 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:50:14,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-11-29 01:50:14,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 01:50:14,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:50:14,225 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 75 conjunts are in the unsatisfiable core [2023-11-29 01:50:14,227 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:50:14,494 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:50:14,494 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:50:15,070 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-11-29 01:50:15,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607815285] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:50:15,071 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:50:15,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 27, 17] total 48 [2023-11-29 01:50:15,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936412341] [2023-11-29 01:50:15,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:50:15,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-11-29 01:50:15,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:50:15,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-11-29 01:50:15,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=379, Invalid=1877, Unknown=0, NotChecked=0, Total=2256 [2023-11-29 01:50:15,073 INFO L87 Difference]: Start difference. First operand 504 states and 683 transitions. Second operand has 48 states, 48 states have (on average 1.5) internal successors, (72), 48 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:50:27,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:50:27,730 INFO L93 Difference]: Finished difference Result 1094 states and 1521 transitions. [2023-11-29 01:50:27,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2023-11-29 01:50:27,730 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.5) internal successors, (72), 48 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2023-11-29 01:50:27,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:50:27,735 INFO L225 Difference]: With dead ends: 1094 [2023-11-29 01:50:27,735 INFO L226 Difference]: Without dead ends: 886 [2023-11-29 01:50:27,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10021 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=3321, Invalid=25749, Unknown=0, NotChecked=0, Total=29070 [2023-11-29 01:50:27,737 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 250 mSDsluCounter, 1198 mSDsCounter, 0 mSdLazyCounter, 3895 mSolverCounterSat, 519 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 1259 SdHoareTripleChecker+Invalid, 4414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 519 IncrementalHoareTripleChecker+Valid, 3895 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:50:27,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 1259 Invalid, 4414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [519 Valid, 3895 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-11-29 01:50:27,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 886 states. [2023-11-29 01:50:28,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 886 to 448. [2023-11-29 01:50:28,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 447 states have (on average 1.378076062639821) internal successors, (616), 447 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:50:28,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 616 transitions. [2023-11-29 01:50:28,144 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 616 transitions. Word has length 36 [2023-11-29 01:50:28,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:50:28,144 INFO L495 AbstractCegarLoop]: Abstraction has 448 states and 616 transitions. [2023-11-29 01:50:28,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.5) internal successors, (72), 48 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:50:28,145 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 616 transitions. [2023-11-29 01:50:28,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-29 01:50:28,145 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:50:28,145 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:50:28,150 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-11-29 01:50:28,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:50:28,346 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:50:28,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:50:28,346 INFO L85 PathProgramCache]: Analyzing trace with hash -349083083, now seen corresponding path program 9 times [2023-11-29 01:50:28,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:50:28,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518918572] [2023-11-29 01:50:28,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:50:28,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:50:28,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:50:28,588 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-11-29 01:50:28,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:50:28,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518918572] [2023-11-29 01:50:28,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518918572] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:50:28,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896497792] [2023-11-29 01:50:28,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 01:50:28,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:50:28,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:50:28,590 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:50:28,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-11-29 01:50:28,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-11-29 01:50:28,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:50:28,787 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-29 01:50:28,788 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:50:29,046 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-11-29 01:50:29,046 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:50:29,390 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-11-29 01:50:29,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896497792] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:50:29,390 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:50:29,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 11, 11] total 39 [2023-11-29 01:50:29,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675854555] [2023-11-29 01:50:29,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:50:29,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-11-29 01:50:29,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:50:29,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-11-29 01:50:29,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1320, Unknown=0, NotChecked=0, Total=1482 [2023-11-29 01:50:29,392 INFO L87 Difference]: Start difference. First operand 448 states and 616 transitions. Second operand has 39 states, 39 states have (on average 1.564102564102564) internal successors, (61), 39 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:50:45,448 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 01:52:00,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:52:00,122 INFO L93 Difference]: Finished difference Result 1027 states and 1464 transitions. [2023-11-29 01:52:00,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 244 states. [2023-11-29 01:52:00,122 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.564102564102564) internal successors, (61), 39 states have internal predecessors, (61), 0 states have call successors, (0), 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 37 [2023-11-29 01:52:00,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:52:00,125 INFO L225 Difference]: With dead ends: 1027 [2023-11-29 01:52:00,126 INFO L226 Difference]: Without dead ends: 881 [2023-11-29 01:52:00,128 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 258 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25736 ImplicationChecksByTransitivity, 82.6s TimeCoverageRelationStatistics Valid=6309, Invalid=61031, Unknown=0, NotChecked=0, Total=67340 [2023-11-29 01:52:00,128 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 462 mSDsluCounter, 765 mSDsCounter, 0 mSdLazyCounter, 3021 mSolverCounterSat, 418 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 462 SdHoareTripleChecker+Valid, 807 SdHoareTripleChecker+Invalid, 3439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 418 IncrementalHoareTripleChecker+Valid, 3021 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2023-11-29 01:52:00,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [462 Valid, 807 Invalid, 3439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [418 Valid, 3021 Invalid, 0 Unknown, 0 Unchecked, 7.7s Time] [2023-11-29 01:52:00,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 881 states. [2023-11-29 01:52:00,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 881 to 486. [2023-11-29 01:52:00,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 485 states have (on average 1.3670103092783505) internal successors, (663), 485 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:52:00,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 663 transitions. [2023-11-29 01:52:00,560 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 663 transitions. Word has length 37 [2023-11-29 01:52:00,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:52:00,560 INFO L495 AbstractCegarLoop]: Abstraction has 486 states and 663 transitions. [2023-11-29 01:52:00,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.564102564102564) internal successors, (61), 39 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:52:00,560 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 663 transitions. [2023-11-29 01:52:00,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-29 01:52:00,561 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:52:00,561 INFO L195 NwaCegarLoop]: trace histogram [13, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:52:00,566 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2023-11-29 01:52:00,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:52:00,761 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:52:00,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:52:00,762 INFO L85 PathProgramCache]: Analyzing trace with hash -680983323, now seen corresponding path program 15 times [2023-11-29 01:52:00,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:52:00,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552816562] [2023-11-29 01:52:00,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:52:00,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:52:00,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:52:01,004 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-29 01:52:01,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:52:01,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552816562] [2023-11-29 01:52:01,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552816562] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:52:01,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025789671] [2023-11-29 01:52:01,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 01:52:01,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:52:01,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:52:01,005 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:52:01,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-11-29 01:52:01,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 01:52:01,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:52:01,067 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 53 conjunts are in the unsatisfiable core [2023-11-29 01:52:01,068 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:52:01,330 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2023-11-29 01:52:01,330 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:52:02,020 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-11-29 01:52:02,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025789671] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:52:02,020 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:52:02,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 13, 18] total 47 [2023-11-29 01:52:02,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282566219] [2023-11-29 01:52:02,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:52:02,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-11-29 01:52:02,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:52:02,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-11-29 01:52:02,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1966, Unknown=0, NotChecked=0, Total=2162 [2023-11-29 01:52:02,022 INFO L87 Difference]: Start difference. First operand 486 states and 663 transitions. Second operand has 47 states, 47 states have (on average 1.5957446808510638) internal successors, (75), 47 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:52:17,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:52:17,979 INFO L93 Difference]: Finished difference Result 1100 states and 1500 transitions. [2023-11-29 01:52:17,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2023-11-29 01:52:17,979 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.5957446808510638) internal successors, (75), 47 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2023-11-29 01:52:17,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:52:17,982 INFO L225 Difference]: With dead ends: 1100 [2023-11-29 01:52:17,982 INFO L226 Difference]: Without dead ends: 835 [2023-11-29 01:52:17,984 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8446 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=3039, Invalid=27411, Unknown=0, NotChecked=0, Total=30450 [2023-11-29 01:52:17,984 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 241 mSDsluCounter, 1647 mSDsCounter, 0 mSdLazyCounter, 5103 mSolverCounterSat, 550 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 1706 SdHoareTripleChecker+Invalid, 5653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 550 IncrementalHoareTripleChecker+Valid, 5103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-11-29 01:52:17,984 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 1706 Invalid, 5653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [550 Valid, 5103 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2023-11-29 01:52:17,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 835 states. [2023-11-29 01:52:18,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 835 to 531. [2023-11-29 01:52:18,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 530 states have (on average 1.381132075471698) internal successors, (732), 530 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:52:18,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 732 transitions. [2023-11-29 01:52:18,495 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 732 transitions. Word has length 38 [2023-11-29 01:52:18,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:52:18,495 INFO L495 AbstractCegarLoop]: Abstraction has 531 states and 732 transitions. [2023-11-29 01:52:18,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.5957446808510638) internal successors, (75), 47 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:52:18,496 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 732 transitions. [2023-11-29 01:52:18,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-29 01:52:18,497 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:52:18,497 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:52:18,501 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2023-11-29 01:52:18,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:52:18,698 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:52:18,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:52:18,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1073563949, now seen corresponding path program 10 times [2023-11-29 01:52:18,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:52:18,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159603163] [2023-11-29 01:52:18,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:52:18,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:52:18,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:52:19,032 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 01:52:19,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:52:19,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159603163] [2023-11-29 01:52:19,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159603163] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:52:19,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039899717] [2023-11-29 01:52:19,033 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 01:52:19,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:52:19,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:52:19,034 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:52:19,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-11-29 01:52:19,093 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 01:52:19,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:52:19,094 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-29 01:52:19,096 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:52:19,404 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 21 proven. 69 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-11-29 01:52:19,404 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:52:19,890 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 21 proven. 69 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-11-29 01:52:19,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039899717] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:52:19,890 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:52:19,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 12, 12] total 33 [2023-11-29 01:52:19,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989689201] [2023-11-29 01:52:19,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:52:19,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-29 01:52:19,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:52:19,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-29 01:52:19,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=992, Unknown=0, NotChecked=0, Total=1056 [2023-11-29 01:52:19,892 INFO L87 Difference]: Start difference. First operand 531 states and 732 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:53:33,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:53:33,553 INFO L93 Difference]: Finished difference Result 735 states and 1062 transitions. [2023-11-29 01:53:33,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2023-11-29 01:53:33,553 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-11-29 01:53:33,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:53:33,556 INFO L225 Difference]: With dead ends: 735 [2023-11-29 01:53:33,556 INFO L226 Difference]: Without dead ends: 629 [2023-11-29 01:53:33,557 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 58 SyntacticMatches, 18 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5668 ImplicationChecksByTransitivity, 69.3s TimeCoverageRelationStatistics Valid=1921, Invalid=17819, Unknown=0, NotChecked=0, Total=19740 [2023-11-29 01:53:33,558 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 153 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 2338 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 2519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 2338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:53:33,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 176 Invalid, 2519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 2338 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2023-11-29 01:53:33,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2023-11-29 01:53:34,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 553. [2023-11-29 01:53:34,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 552 states have (on average 1.3478260869565217) internal successors, (744), 552 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:53:34,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 744 transitions. [2023-11-29 01:53:34,153 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 744 transitions. Word has length 39 [2023-11-29 01:53:34,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:53:34,153 INFO L495 AbstractCegarLoop]: Abstraction has 553 states and 744 transitions. [2023-11-29 01:53:34,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:53:34,153 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 744 transitions. [2023-11-29 01:53:34,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-29 01:53:34,154 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:53:34,154 INFO L195 NwaCegarLoop]: trace histogram [14, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:53:34,158 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2023-11-29 01:53:34,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:53:34,355 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:53:34,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:53:34,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1557158412, now seen corresponding path program 11 times [2023-11-29 01:53:34,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:53:34,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7363909] [2023-11-29 01:53:34,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:53:34,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:53:34,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:53:34,653 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 01:53:34,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:53:34,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7363909] [2023-11-29 01:53:34,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7363909] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:53:34,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864215186] [2023-11-29 01:53:34,653 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 01:53:34,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:53:34,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:53:34,655 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:53:34,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-11-29 01:53:35,371 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2023-11-29 01:53:35,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:53:35,374 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 79 conjunts are in the unsatisfiable core [2023-11-29 01:53:35,376 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:53:35,707 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:53:35,707 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:53:36,310 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2023-11-29 01:53:36,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864215186] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:53:36,310 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:53:36,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 31, 19] total 55 [2023-11-29 01:53:36,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688357745] [2023-11-29 01:53:36,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:53:36,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2023-11-29 01:53:36,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:53:36,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2023-11-29 01:53:36,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=475, Invalid=2495, Unknown=0, NotChecked=0, Total=2970 [2023-11-29 01:53:36,312 INFO L87 Difference]: Start difference. First operand 553 states and 744 transitions. Second operand has 55 states, 55 states have (on average 1.3818181818181818) internal successors, (76), 55 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) [2023-11-29 01:53:55,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:53:55,876 INFO L93 Difference]: Finished difference Result 1360 states and 1866 transitions. [2023-11-29 01:53:55,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2023-11-29 01:53:55,876 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.3818181818181818) internal successors, (76), 55 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) Word has length 39 [2023-11-29 01:53:55,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:53:55,880 INFO L225 Difference]: With dead ends: 1360 [2023-11-29 01:53:55,881 INFO L226 Difference]: Without dead ends: 1103 [2023-11-29 01:53:55,882 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11326 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=3470, Invalid=31312, Unknown=0, NotChecked=0, Total=34782 [2023-11-29 01:53:55,883 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 270 mSDsluCounter, 1499 mSDsCounter, 0 mSdLazyCounter, 5708 mSolverCounterSat, 492 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 1567 SdHoareTripleChecker+Invalid, 6200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 492 IncrementalHoareTripleChecker+Valid, 5708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2023-11-29 01:53:55,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [270 Valid, 1567 Invalid, 6200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [492 Valid, 5708 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2023-11-29 01:53:55,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1103 states. [2023-11-29 01:53:56,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1103 to 600. [2023-11-29 01:53:56,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 600 states, 599 states have (on average 1.333889816360601) internal successors, (799), 599 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:53:56,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 799 transitions. [2023-11-29 01:53:56,540 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 799 transitions. Word has length 39 [2023-11-29 01:53:56,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:53:56,540 INFO L495 AbstractCegarLoop]: Abstraction has 600 states and 799 transitions. [2023-11-29 01:53:56,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.3818181818181818) internal successors, (76), 55 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) [2023-11-29 01:53:56,540 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 799 transitions. [2023-11-29 01:53:56,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-29 01:53:56,541 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:53:56,541 INFO L195 NwaCegarLoop]: trace histogram [15, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:53:56,549 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-11-29 01:53:56,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2023-11-29 01:53:56,742 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:53:56,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:53:56,742 INFO L85 PathProgramCache]: Analyzing trace with hash -2141934014, now seen corresponding path program 16 times [2023-11-29 01:53:56,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:53:56,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026636415] [2023-11-29 01:53:56,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:53:56,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:53:56,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:53:57,067 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-29 01:53:57,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:53:57,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026636415] [2023-11-29 01:53:57,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026636415] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:53:57,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219166937] [2023-11-29 01:53:57,068 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 01:53:57,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:53:57,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:53:57,069 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:53:57,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-11-29 01:53:57,131 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 01:53:57,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:53:57,133 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-29 01:53:57,134 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:53:57,238 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-29 01:53:57,238 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:53:57,475 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2023-11-29 01:53:57,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219166937] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:53:57,475 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:53:57,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21, 10] total 36 [2023-11-29 01:53:57,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179819311] [2023-11-29 01:53:57,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:53:57,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-11-29 01:53:57,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:53:57,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-11-29 01:53:57,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=1018, Unknown=0, NotChecked=0, Total=1260 [2023-11-29 01:53:57,477 INFO L87 Difference]: Start difference. First operand 600 states and 799 transitions. Second operand has 36 states, 36 states have (on average 1.6111111111111112) internal successors, (58), 36 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) [2023-11-29 01:54:00,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:54:00,760 INFO L93 Difference]: Finished difference Result 1380 states and 1836 transitions. [2023-11-29 01:54:00,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-11-29 01:54:00,760 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.6111111111111112) internal successors, (58), 36 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) Word has length 41 [2023-11-29 01:54:00,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:54:00,765 INFO L225 Difference]: With dead ends: 1380 [2023-11-29 01:54:00,765 INFO L226 Difference]: Without dead ends: 1136 [2023-11-29 01:54:00,766 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1001, Invalid=3289, Unknown=0, NotChecked=0, Total=4290 [2023-11-29 01:54:00,766 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 420 mSDsluCounter, 1200 mSDsCounter, 0 mSdLazyCounter, 1903 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 420 SdHoareTripleChecker+Valid, 1280 SdHoareTripleChecker+Invalid, 2110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 1903 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-29 01:54:00,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [420 Valid, 1280 Invalid, 2110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 1903 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-29 01:54:00,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1136 states. [2023-11-29 01:54:01,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1136 to 687. [2023-11-29 01:54:01,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 687 states, 686 states have (on average 1.2784256559766765) internal successors, (877), 686 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:54:01,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 877 transitions. [2023-11-29 01:54:01,433 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 877 transitions. Word has length 41 [2023-11-29 01:54:01,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:54:01,433 INFO L495 AbstractCegarLoop]: Abstraction has 687 states and 877 transitions. [2023-11-29 01:54:01,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.6111111111111112) internal successors, (58), 36 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) [2023-11-29 01:54:01,434 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 877 transitions. [2023-11-29 01:54:01,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-29 01:54:01,435 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:54:01,435 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:54:01,439 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-11-29 01:54:01,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:54:01,635 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:54:01,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:54:01,635 INFO L85 PathProgramCache]: Analyzing trace with hash 1523110455, now seen corresponding path program 12 times [2023-11-29 01:54:01,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:54:01,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276565268] [2023-11-29 01:54:01,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:54:01,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:54:01,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:54:01,947 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-11-29 01:54:01,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:54:01,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276565268] [2023-11-29 01:54:01,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276565268] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:54:01,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469882125] [2023-11-29 01:54:01,948 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 01:54:01,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:54:01,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:54:01,949 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:54:01,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-11-29 01:54:02,207 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2023-11-29 01:54:02,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:54:02,210 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 62 conjunts are in the unsatisfiable core [2023-11-29 01:54:02,211 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:54:02,430 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-11-29 01:54:02,430 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:54:03,101 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-11-29 01:54:03,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469882125] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:54:03,101 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:54:03,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 53 [2023-11-29 01:54:03,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243890291] [2023-11-29 01:54:03,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:54:03,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-11-29 01:54:03,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:54:03,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-11-29 01:54:03,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=345, Invalid=2411, Unknown=0, NotChecked=0, Total=2756 [2023-11-29 01:54:03,102 INFO L87 Difference]: Start difference. First operand 687 states and 877 transitions. Second operand has 53 states, 53 states have (on average 1.2452830188679245) internal successors, (66), 53 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) [2023-11-29 01:55:04,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:55:04,187 INFO L93 Difference]: Finished difference Result 1063 states and 1329 transitions. [2023-11-29 01:55:04,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2023-11-29 01:55:04,188 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.2452830188679245) internal successors, (66), 53 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 42 [2023-11-29 01:55:04,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:55:04,191 INFO L225 Difference]: With dead ends: 1063 [2023-11-29 01:55:04,191 INFO L226 Difference]: Without dead ends: 874 [2023-11-29 01:55:04,192 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1571 ImplicationChecksByTransitivity, 56.2s TimeCoverageRelationStatistics Valid=933, Invalid=7077, Unknown=0, NotChecked=0, Total=8010 [2023-11-29 01:55:04,192 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 450 mSDsluCounter, 1269 mSDsCounter, 0 mSdLazyCounter, 2489 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 450 SdHoareTripleChecker+Valid, 1330 SdHoareTripleChecker+Invalid, 2685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 2489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2023-11-29 01:55:04,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [450 Valid, 1330 Invalid, 2685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 2489 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2023-11-29 01:55:04,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2023-11-29 01:55:04,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 646. [2023-11-29 01:55:04,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 646 states, 645 states have (on average 1.2666666666666666) internal successors, (817), 645 states have internal predecessors, (817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:55:04,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 817 transitions. [2023-11-29 01:55:04,794 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 817 transitions. Word has length 42 [2023-11-29 01:55:04,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:55:04,795 INFO L495 AbstractCegarLoop]: Abstraction has 646 states and 817 transitions. [2023-11-29 01:55:04,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.2452830188679245) internal successors, (66), 53 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) [2023-11-29 01:55:04,795 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 817 transitions. [2023-11-29 01:55:04,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-29 01:55:04,796 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:55:04,796 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:55:04,800 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2023-11-29 01:55:04,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2023-11-29 01:55:04,997 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:55:04,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:55:04,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1702945065, now seen corresponding path program 13 times [2023-11-29 01:55:04,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:55:04,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196302710] [2023-11-29 01:55:04,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:55:04,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:55:05,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:55:05,421 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 01:55:05,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:55:05,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196302710] [2023-11-29 01:55:05,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196302710] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:55:05,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195611188] [2023-11-29 01:55:05,422 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 01:55:05,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:55:05,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:55:05,423 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:55:05,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-11-29 01:55:05,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:55:05,485 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 42 conjunts are in the unsatisfiable core [2023-11-29 01:55:05,486 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:55:05,876 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 24 proven. 86 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-11-29 01:55:05,876 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:55:06,507 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 24 proven. 86 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-11-29 01:55:06,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195611188] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:55:06,507 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:55:06,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 13, 13] total 36 [2023-11-29 01:55:06,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203588032] [2023-11-29 01:55:06,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:55:06,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-11-29 01:55:06,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:55:06,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-11-29 01:55:06,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=1190, Unknown=0, NotChecked=0, Total=1260 [2023-11-29 01:55:06,509 INFO L87 Difference]: Start difference. First operand 646 states and 817 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:58:32,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:58:32,480 INFO L93 Difference]: Finished difference Result 879 states and 1194 transitions. [2023-11-29 01:58:32,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 178 states. [2023-11-29 01:58:32,480 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2023-11-29 01:58:32,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:58:32,483 INFO L225 Difference]: With dead ends: 879 [2023-11-29 01:58:32,483 INFO L226 Difference]: Without dead ends: 808 [2023-11-29 01:58:32,485 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 62 SyntacticMatches, 20 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14685 ImplicationChecksByTransitivity, 193.9s TimeCoverageRelationStatistics Valid=3376, Invalid=40096, Unknown=0, NotChecked=0, Total=43472 [2023-11-29 01:58:32,485 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 260 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 4459 mSolverCounterSat, 296 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 4755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 296 IncrementalHoareTripleChecker+Valid, 4459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.5s IncrementalHoareTripleChecker+Time [2023-11-29 01:58:32,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [260 Valid, 263 Invalid, 4755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [296 Valid, 4459 Invalid, 0 Unknown, 0 Unchecked, 11.5s Time] [2023-11-29 01:58:32,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 808 states. [2023-11-29 01:58:33,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 808 to 660. [2023-11-29 01:58:33,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 660 states, 659 states have (on average 1.2625189681335356) internal successors, (832), 659 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:58:33,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 832 transitions. [2023-11-29 01:58:33,147 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 832 transitions. Word has length 42 [2023-11-29 01:58:33,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:58:33,148 INFO L495 AbstractCegarLoop]: Abstraction has 660 states and 832 transitions. [2023-11-29 01:58:33,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:58:33,148 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 832 transitions. [2023-11-29 01:58:33,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-29 01:58:33,149 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:58:33,149 INFO L195 NwaCegarLoop]: trace histogram [16, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:58:33,156 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2023-11-29 01:58:33,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2023-11-29 01:58:33,349 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:58:33,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:58:33,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1821587031, now seen corresponding path program 14 times [2023-11-29 01:58:33,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:58:33,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644053901] [2023-11-29 01:58:33,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:58:33,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:58:33,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:58:33,698 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 151 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-29 01:58:33,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:58:33,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644053901] [2023-11-29 01:58:33,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644053901] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:58:33,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814716055] [2023-11-29 01:58:33,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 01:58:33,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:58:33,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:58:33,700 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:58:33,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-11-29 01:58:33,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 01:58:33,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:58:33,766 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 58 conjunts are in the unsatisfiable core [2023-11-29 01:58:33,768 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:58:33,914 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 151 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-29 01:58:33,915 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:58:34,323 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2023-11-29 01:58:34,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814716055] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:58:34,323 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:58:34,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 14] total 43 [2023-11-29 01:58:34,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202096038] [2023-11-29 01:58:34,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:58:34,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-11-29 01:58:34,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:58:34,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-11-29 01:58:34,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1611, Unknown=0, NotChecked=0, Total=1806 [2023-11-29 01:58:34,324 INFO L87 Difference]: Start difference. First operand 660 states and 832 transitions. Second operand has 43 states, 43 states have (on average 1.302325581395349) internal successors, (56), 43 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:58:51,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:58:51,613 INFO L93 Difference]: Finished difference Result 1285 states and 1610 transitions. [2023-11-29 01:58:51,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2023-11-29 01:58:51,614 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.302325581395349) internal successors, (56), 43 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2023-11-29 01:58:51,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:58:51,617 INFO L225 Difference]: With dead ends: 1285 [2023-11-29 01:58:51,618 INFO L226 Difference]: Without dead ends: 991 [2023-11-29 01:58:51,619 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7432 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=1482, Invalid=23324, Unknown=0, NotChecked=0, Total=24806 [2023-11-29 01:58:51,619 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 278 mSDsluCounter, 2021 mSDsCounter, 0 mSdLazyCounter, 3106 mSolverCounterSat, 292 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 2112 SdHoareTripleChecker+Invalid, 3398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 292 IncrementalHoareTripleChecker+Valid, 3106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:58:51,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [278 Valid, 2112 Invalid, 3398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [292 Valid, 3106 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-11-29 01:58:51,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 991 states. [2023-11-29 01:58:52,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 991 to 599. [2023-11-29 01:58:52,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 598 states have (on average 1.2909698996655519) internal successors, (772), 598 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:58:52,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 772 transitions. [2023-11-29 01:58:52,296 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 772 transitions. Word has length 42 [2023-11-29 01:58:52,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:58:52,296 INFO L495 AbstractCegarLoop]: Abstraction has 599 states and 772 transitions. [2023-11-29 01:58:52,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.302325581395349) internal successors, (56), 43 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:58:52,296 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 772 transitions. [2023-11-29 01:58:52,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-29 01:58:52,297 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:58:52,297 INFO L195 NwaCegarLoop]: trace histogram [17, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:58:52,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2023-11-29 01:58:52,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-11-29 01:58:52,498 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:58:52,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:58:52,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1220518553, now seen corresponding path program 17 times [2023-11-29 01:58:52,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:58:52,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836165432] [2023-11-29 01:58:52,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:58:52,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:58:52,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:58:52,857 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 168 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-11-29 01:58:52,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:58:52,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836165432] [2023-11-29 01:58:52,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836165432] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:58:52,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337005466] [2023-11-29 01:58:52,857 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 01:58:52,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:58:52,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:58:52,858 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:58:52,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-11-29 01:58:59,111 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2023-11-29 01:58:59,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:58:59,117 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 93 conjunts are in the unsatisfiable core [2023-11-29 01:58:59,119 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:58:59,538 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 201 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:58:59,538 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:59:00,331 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2023-11-29 01:59:00,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337005466] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:59:00,331 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:59:00,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 36, 21] total 62 [2023-11-29 01:59:00,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390125689] [2023-11-29 01:59:00,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:59:00,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2023-11-29 01:59:00,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:59:00,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2023-11-29 01:59:00,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=578, Invalid=3204, Unknown=0, NotChecked=0, Total=3782 [2023-11-29 01:59:00,333 INFO L87 Difference]: Start difference. First operand 599 states and 772 transitions. Second operand has 62 states, 62 states have (on average 1.3548387096774193) internal successors, (84), 62 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) [2023-11-29 01:59:31,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:59:31,435 INFO L93 Difference]: Finished difference Result 1418 states and 1851 transitions. [2023-11-29 01:59:31,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 219 states. [2023-11-29 01:59:31,435 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.3548387096774193) internal successors, (84), 62 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) Word has length 44 [2023-11-29 01:59:31,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:59:31,441 INFO L225 Difference]: With dead ends: 1418 [2023-11-29 01:59:31,441 INFO L226 Difference]: Without dead ends: 1220 [2023-11-29 01:59:31,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 248 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22364 ImplicationChecksByTransitivity, 22.1s TimeCoverageRelationStatistics Valid=5814, Invalid=56436, Unknown=0, NotChecked=0, Total=62250 [2023-11-29 01:59:31,444 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 449 mSDsluCounter, 2109 mSDsCounter, 0 mSdLazyCounter, 7360 mSolverCounterSat, 857 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 449 SdHoareTripleChecker+Valid, 2195 SdHoareTripleChecker+Invalid, 8217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 857 IncrementalHoareTripleChecker+Valid, 7360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2023-11-29 01:59:31,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [449 Valid, 2195 Invalid, 8217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [857 Valid, 7360 Invalid, 0 Unknown, 0 Unchecked, 6.7s Time] [2023-11-29 01:59:31,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1220 states. [2023-11-29 01:59:32,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1220 to 586. [2023-11-29 01:59:32,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 585 states have (on average 1.3247863247863247) internal successors, (775), 585 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:59:32,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 775 transitions. [2023-11-29 01:59:32,189 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 775 transitions. Word has length 44 [2023-11-29 01:59:32,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:59:32,190 INFO L495 AbstractCegarLoop]: Abstraction has 586 states and 775 transitions. [2023-11-29 01:59:32,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.3548387096774193) internal successors, (84), 62 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) [2023-11-29 01:59:32,190 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 775 transitions. [2023-11-29 01:59:32,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-29 01:59:32,191 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:59:32,191 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:59:32,198 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2023-11-29 01:59:32,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-11-29 01:59:32,392 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:59:32,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:59:32,392 INFO L85 PathProgramCache]: Analyzing trace with hash 302468341, now seen corresponding path program 15 times [2023-11-29 01:59:32,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:59:32,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771090016] [2023-11-29 01:59:32,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:59:32,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:59:32,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:59:32,710 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-11-29 01:59:32,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:59:32,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771090016] [2023-11-29 01:59:32,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771090016] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:59:32,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152653713] [2023-11-29 01:59:32,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 01:59:32,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:59:32,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:59:32,712 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:59:32,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c1112e-6997-4ca9-83bc-36372ecd43c0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-11-29 01:59:33,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-11-29 01:59:33,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:59:33,212 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-29 01:59:33,213 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:59:33,558 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2023-11-29 01:59:33,558 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:59:34,031 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2023-11-29 01:59:34,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152653713] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:59:34,031 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 01:59:34,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 13, 13] total 47 [2023-11-29 01:59:34,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866603551] [2023-11-29 01:59:34,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 01:59:34,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-11-29 01:59:34,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:59:34,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-11-29 01:59:34,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1944, Unknown=0, NotChecked=0, Total=2162 [2023-11-29 01:59:34,033 INFO L87 Difference]: Start difference. First operand 586 states and 775 transitions. Second operand has 47 states, 47 states have (on average 1.553191489361702) internal successors, (73), 47 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)