./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-lopstr16/break-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff 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_bcb639e4-6102-48f5-84bd-3e16d2dd0488/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcb639e4-6102-48f5-84bd-3e16d2dd0488/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcb639e4-6102-48f5-84bd-3e16d2dd0488/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcb639e4-6102-48f5-84bd-3e16d2dd0488/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-lopstr16/break-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcb639e4-6102-48f5-84bd-3e16d2dd0488/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcb639e4-6102-48f5-84bd-3e16d2dd0488/bin/uautomizer-verify-uCwYo4JHxu --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 af12e42a5d3a022d66b7920ff01dec158b3de4df470747e943653bc7f1da2cc9 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:59:03,919 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:59:04,005 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcb639e4-6102-48f5-84bd-3e16d2dd0488/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:59:04,011 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:59:04,011 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:59:04,035 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:59:04,036 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:59:04,037 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:59:04,038 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:59:04,038 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:59:04,039 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:59:04,040 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:59:04,040 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:59:04,041 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:59:04,042 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:59:04,042 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:59:04,043 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:59:04,043 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:59:04,044 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:59:04,044 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:59:04,045 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:59:04,045 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:59:04,046 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:59:04,046 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:59:04,047 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:59:04,047 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:59:04,048 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:59:04,048 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:59:04,049 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:59:04,049 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:59:04,050 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:59:04,050 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:59:04,051 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:59:04,051 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:59:04,051 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:59:04,052 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:59:04,052 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:59:04,053 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:59:04,053 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:59:04,053 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_bcb639e4-6102-48f5-84bd-3e16d2dd0488/bin/uautomizer-verify-uCwYo4JHxu/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcb639e4-6102-48f5-84bd-3e16d2dd0488/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> af12e42a5d3a022d66b7920ff01dec158b3de4df470747e943653bc7f1da2cc9 [2023-11-19 07:59:04,349 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:59:04,382 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:59:04,385 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:59:04,387 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:59:04,387 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:59:04,389 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcb639e4-6102-48f5-84bd-3e16d2dd0488/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/array-lopstr16/break-2.i [2023-11-19 07:59:07,425 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:59:07,714 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:59:07,715 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcb639e4-6102-48f5-84bd-3e16d2dd0488/sv-benchmarks/c/array-lopstr16/break-2.i [2023-11-19 07:59:07,724 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcb639e4-6102-48f5-84bd-3e16d2dd0488/bin/uautomizer-verify-uCwYo4JHxu/data/dfb81f2d3/b20a8673d3ed473c945d2ef3b9fd74c4/FLAG4c06e9560 [2023-11-19 07:59:07,739 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcb639e4-6102-48f5-84bd-3e16d2dd0488/bin/uautomizer-verify-uCwYo4JHxu/data/dfb81f2d3/b20a8673d3ed473c945d2ef3b9fd74c4 [2023-11-19 07:59:07,742 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:59:07,743 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:59:07,751 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:59:07,751 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:59:07,758 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:59:07,759 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:59:07" (1/1) ... [2023-11-19 07:59:07,760 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@574d2f8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:07, skipping insertion in model container [2023-11-19 07:59:07,760 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:59:07" (1/1) ... [2023-11-19 07:59:07,787 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:59:07,984 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_bcb639e4-6102-48f5-84bd-3e16d2dd0488/sv-benchmarks/c/array-lopstr16/break-2.i[800,813] [2023-11-19 07:59:08,007 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:59:15,533 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:59:15,546 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_bcb639e4-6102-48f5-84bd-3e16d2dd0488/sv-benchmarks/c/array-lopstr16/break-2.i[800,813] [2023-11-19 07:59:15,551 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:59:15,568 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:59:15,569 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:15 WrapperNode [2023-11-19 07:59:15,569 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:59:15,571 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:59:15,571 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:59:15,571 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:59:15,579 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:15" (1/1) ... [2023-11-19 07:59:15,589 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:15" (1/1) ... [2023-11-19 07:59:15,610 INFO L138 Inliner]: procedures = 14, calls = 10, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 42 [2023-11-19 07:59:15,610 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:59:15,611 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:59:15,611 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:59:15,612 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:59:15,622 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:15" (1/1) ... [2023-11-19 07:59:15,623 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:15" (1/1) ... [2023-11-19 07:59:15,624 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:15" (1/1) ... [2023-11-19 07:59:15,625 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:15" (1/1) ... [2023-11-19 07:59:15,629 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:15" (1/1) ... [2023-11-19 07:59:15,633 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:15" (1/1) ... [2023-11-19 07:59:15,634 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:15" (1/1) ... [2023-11-19 07:59:15,635 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:15" (1/1) ... [2023-11-19 07:59:15,637 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:59:15,638 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:59:15,638 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:59:15,639 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:59:15,640 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:15" (1/1) ... [2023-11-19 07:59:15,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:59:15,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcb639e4-6102-48f5-84bd-3e16d2dd0488/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:59:15,669 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcb639e4-6102-48f5-84bd-3e16d2dd0488/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:59:15,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcb639e4-6102-48f5-84bd-3e16d2dd0488/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:59:15,720 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:59:15,721 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:59:15,721 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:59:15,721 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:59:15,721 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:59:15,722 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:59:15,815 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:59:15,818 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:59:16,014 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:59:16,023 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:59:16,024 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-19 07:59:16,027 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:59:16 BoogieIcfgContainer [2023-11-19 07:59:16,028 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:59:16,034 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:59:16,034 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:59:16,038 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:59:16,038 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:59:07" (1/3) ... [2023-11-19 07:59:16,039 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@538cc602 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:59:16, skipping insertion in model container [2023-11-19 07:59:16,039 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:15" (2/3) ... [2023-11-19 07:59:16,041 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@538cc602 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:59:16, skipping insertion in model container [2023-11-19 07:59:16,042 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:59:16" (3/3) ... [2023-11-19 07:59:16,043 INFO L112 eAbstractionObserver]: Analyzing ICFG break-2.i [2023-11-19 07:59:16,068 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:59:16,069 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:59:16,133 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:59:16,145 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;@44635320, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:59:16,145 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 07:59:16,150 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 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) [2023-11-19 07:59:16,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-19 07:59:16,158 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:59:16,159 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:59:16,160 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:59:16,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:59:16,168 INFO L85 PathProgramCache]: Analyzing trace with hash 531796522, now seen corresponding path program 1 times [2023-11-19 07:59:16,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:59:16,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188820566] [2023-11-19 07:59:16,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:59:16,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:59:16,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:59:16,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:59:16,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:59:16,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188820566] [2023-11-19 07:59:16,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188820566] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:59:16,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:59:16,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:59:16,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953221009] [2023-11-19 07:59:16,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:59:16,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 07:59:16,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:59:16,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 07:59:16,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:59:16,424 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 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 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:16,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:59:16,441 INFO L93 Difference]: Finished difference Result 29 states and 38 transitions. [2023-11-19 07:59:16,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 07:59:16,443 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2023-11-19 07:59:16,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:59:16,452 INFO L225 Difference]: With dead ends: 29 [2023-11-19 07:59:16,452 INFO L226 Difference]: Without dead ends: 13 [2023-11-19 07:59:16,455 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 [2023-11-19 07:59:16,459 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:59:16,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:59:16,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2023-11-19 07:59:16,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2023-11-19 07:59:16,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 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) [2023-11-19 07:59:16,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2023-11-19 07:59:16,492 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 8 [2023-11-19 07:59:16,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:59:16,493 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2023-11-19 07:59:16,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:16,493 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2023-11-19 07:59:16,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-19 07:59:16,494 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:59:16,494 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:59:16,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:59:16,494 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:59:16,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:59:16,495 INFO L85 PathProgramCache]: Analyzing trace with hash 216875861, now seen corresponding path program 1 times [2023-11-19 07:59:16,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:59:16,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302915703] [2023-11-19 07:59:16,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:59:16,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:59:16,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:59:16,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:59:16,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:59:16,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302915703] [2023-11-19 07:59:16,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302915703] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:59:16,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:59:16,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:59:16,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744156145] [2023-11-19 07:59:16,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:59:16,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:59:16,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:59:16,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:59:16,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:59:16,565 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:16,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:59:16,608 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2023-11-19 07:59:16,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:59:16,609 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2023-11-19 07:59:16,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:59:16,610 INFO L225 Difference]: With dead ends: 31 [2023-11-19 07:59:16,610 INFO L226 Difference]: Without dead ends: 23 [2023-11-19 07:59:16,610 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 [2023-11-19 07:59:16,612 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 8 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:59:16,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 15 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:59:16,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-11-19 07:59:16,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 17. [2023-11-19 07:59:16,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.25) internal successors, (20), 16 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) [2023-11-19 07:59:16,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2023-11-19 07:59:16,619 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 8 [2023-11-19 07:59:16,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:59:16,620 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2023-11-19 07:59:16,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:16,620 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2023-11-19 07:59:16,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-19 07:59:16,621 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:59:16,621 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:59:16,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:59:16,622 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:59:16,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:59:16,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1665715163, now seen corresponding path program 1 times [2023-11-19 07:59:16,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:59:16,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199185685] [2023-11-19 07:59:16,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:59:16,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:59:16,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:59:16,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:59:16,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:59:16,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199185685] [2023-11-19 07:59:16,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199185685] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:59:16,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304725157] [2023-11-19 07:59:16,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:59:16,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:59:16,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcb639e4-6102-48f5-84bd-3e16d2dd0488/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:59:16,716 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcb639e4-6102-48f5-84bd-3e16d2dd0488/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:59:16,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcb639e4-6102-48f5-84bd-3e16d2dd0488/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:59:16,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:59:16,796 INFO L262 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 07:59:16,801 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:59:16,861 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:59:16,862 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:59:16,893 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:59:16,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304725157] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:59:16,893 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:59:16,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-19 07:59:16,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500964067] [2023-11-19 07:59:16,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:59:16,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 07:59:16,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:59:16,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 07:59:16,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:59:16,897 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 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) [2023-11-19 07:59:16,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:59:16,972 INFO L93 Difference]: Finished difference Result 50 states and 60 transitions. [2023-11-19 07:59:16,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:59:16,973 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 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 11 [2023-11-19 07:59:16,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:59:16,974 INFO L225 Difference]: With dead ends: 50 [2023-11-19 07:59:16,974 INFO L226 Difference]: Without dead ends: 40 [2023-11-19 07:59:16,975 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:59:16,976 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 48 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:59:16,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 17 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:59:16,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-11-19 07:59:16,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 25. [2023-11-19 07:59:16,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:16,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2023-11-19 07:59:16,985 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 11 [2023-11-19 07:59:16,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:59:16,985 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2023-11-19 07:59:16,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 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) [2023-11-19 07:59:16,986 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2023-11-19 07:59:16,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-19 07:59:16,986 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:59:16,986 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:59:17,012 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcb639e4-6102-48f5-84bd-3e16d2dd0488/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:59:17,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcb639e4-6102-48f5-84bd-3e16d2dd0488/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:59:17,207 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:59:17,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:59:17,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1774448108, now seen corresponding path program 1 times [2023-11-19 07:59:17,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:59:17,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226308326] [2023-11-19 07:59:17,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:59:17,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:59:17,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:59:17,851 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:59:17,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:59:17,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226308326] [2023-11-19 07:59:17,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226308326] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:59:17,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545715699] [2023-11-19 07:59:17,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:59:17,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:59:17,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcb639e4-6102-48f5-84bd-3e16d2dd0488/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:59:17,857 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcb639e4-6102-48f5-84bd-3e16d2dd0488/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:59:17,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcb639e4-6102-48f5-84bd-3e16d2dd0488/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:59:17,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:59:17,906 INFO L262 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 07:59:17,907 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:59:17,954 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:59:17,955 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:59:18,013 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:59:18,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545715699] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:59:18,014 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:59:18,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 14 [2023-11-19 07:59:18,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791728539] [2023-11-19 07:59:18,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:59:18,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-19 07:59:18,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:59:18,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-19 07:59:18,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2023-11-19 07:59:18,017 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 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) [2023-11-19 07:59:18,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:59:18,460 INFO L93 Difference]: Finished difference Result 81 states and 94 transitions. [2023-11-19 07:59:18,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-19 07:59:18,461 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 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) Word has length 15 [2023-11-19 07:59:18,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:59:18,466 INFO L225 Difference]: With dead ends: 81 [2023-11-19 07:59:18,467 INFO L226 Difference]: Without dead ends: 66 [2023-11-19 07:59:18,470 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=252, Invalid=618, Unknown=0, NotChecked=0, Total=870 [2023-11-19 07:59:18,474 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 91 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:59:18,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 51 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:59:18,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-11-19 07:59:18,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 57. [2023-11-19 07:59:18,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.125) internal successors, (63), 56 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:18,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 63 transitions. [2023-11-19 07:59:18,503 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 63 transitions. Word has length 15 [2023-11-19 07:59:18,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:59:18,503 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 63 transitions. [2023-11-19 07:59:18,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 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) [2023-11-19 07:59:18,504 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 63 transitions. [2023-11-19 07:59:18,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-19 07:59:18,506 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:59:18,507 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:59:18,527 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcb639e4-6102-48f5-84bd-3e16d2dd0488/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:59:18,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcb639e4-6102-48f5-84bd-3e16d2dd0488/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:59:18,722 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:59:18,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:59:18,722 INFO L85 PathProgramCache]: Analyzing trace with hash 1157744319, now seen corresponding path program 1 times [2023-11-19 07:59:18,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:59:18,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646957194] [2023-11-19 07:59:18,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:59:18,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:59:18,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:59:18,912 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 07:59:18,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:59:18,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646957194] [2023-11-19 07:59:18,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646957194] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:59:18,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556311193] [2023-11-19 07:59:18,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:59:18,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:59:18,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcb639e4-6102-48f5-84bd-3e16d2dd0488/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:59:18,915 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcb639e4-6102-48f5-84bd-3e16d2dd0488/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:59:18,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcb639e4-6102-48f5-84bd-3e16d2dd0488/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:59:18,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:59:18,989 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 07:59:18,993 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:59:19,068 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 07:59:19,069 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:59:19,214 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 07:59:19,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556311193] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:59:19,215 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:59:19,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2023-11-19 07:59:19,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27633943] [2023-11-19 07:59:19,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:59:19,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-19 07:59:19,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:59:19,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-19 07:59:19,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2023-11-19 07:59:19,220 INFO L87 Difference]: Start difference. First operand 57 states and 63 transitions. Second operand has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 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) [2023-11-19 07:59:19,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:59:19,455 INFO L93 Difference]: Finished difference Result 181 states and 204 transitions. [2023-11-19 07:59:19,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-19 07:59:19,456 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 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 [2023-11-19 07:59:19,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:59:19,462 INFO L225 Difference]: With dead ends: 181 [2023-11-19 07:59:19,462 INFO L226 Difference]: Without dead ends: 146 [2023-11-19 07:59:19,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2023-11-19 07:59:19,464 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 282 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 07:59:19,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [282 Valid, 62 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 07:59:19,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2023-11-19 07:59:19,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 121. [2023-11-19 07:59:19,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.125) internal successors, (135), 120 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:19,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 135 transitions. [2023-11-19 07:59:19,503 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 135 transitions. Word has length 32 [2023-11-19 07:59:19,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:59:19,503 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 135 transitions. [2023-11-19 07:59:19,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 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) [2023-11-19 07:59:19,503 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 135 transitions. [2023-11-19 07:59:19,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-19 07:59:19,505 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:59:19,505 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:59:19,529 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcb639e4-6102-48f5-84bd-3e16d2dd0488/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:59:19,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcb639e4-6102-48f5-84bd-3e16d2dd0488/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:59:19,729 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:59:19,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:59:19,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1792167871, now seen corresponding path program 2 times [2023-11-19 07:59:19,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:59:19,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842456002] [2023-11-19 07:59:19,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:59:19,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:59:19,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:59:20,246 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 07:59:20,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:59:20,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842456002] [2023-11-19 07:59:20,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842456002] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:59:20,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492872369] [2023-11-19 07:59:20,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:59:20,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:59:20,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcb639e4-6102-48f5-84bd-3e16d2dd0488/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:59:20,249 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcb639e4-6102-48f5-84bd-3e16d2dd0488/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:59:20,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcb639e4-6102-48f5-84bd-3e16d2dd0488/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:59:20,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:59:20,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:59:20,349 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-19 07:59:20,353 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:59:20,462 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 07:59:20,462 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:59:20,935 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 07:59:20,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492872369] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:59:20,936 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:59:20,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2023-11-19 07:59:20,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471202779] [2023-11-19 07:59:20,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:59:20,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-19 07:59:20,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:59:20,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-19 07:59:20,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2023-11-19 07:59:20,944 INFO L87 Difference]: Start difference. First operand 121 states and 135 transitions. Second operand has 33 states, 33 states have (on average 3.121212121212121) internal successors, (103), 33 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) [2023-11-19 07:59:21,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:59:21,392 INFO L93 Difference]: Finished difference Result 381 states and 428 transitions. [2023-11-19 07:59:21,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-19 07:59:21,392 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.121212121212121) internal successors, (103), 33 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2023-11-19 07:59:21,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:59:21,394 INFO L225 Difference]: With dead ends: 381 [2023-11-19 07:59:21,395 INFO L226 Difference]: Without dead ends: 306 [2023-11-19 07:59:21,396 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2023-11-19 07:59:21,397 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 586 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 586 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 07:59:21,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [586 Valid, 127 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 07:59:21,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2023-11-19 07:59:21,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 249. [2023-11-19 07:59:21,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 1.125) internal successors, (279), 248 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:21,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 279 transitions. [2023-11-19 07:59:21,422 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 279 transitions. Word has length 56 [2023-11-19 07:59:21,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:59:21,423 INFO L495 AbstractCegarLoop]: Abstraction has 249 states and 279 transitions. [2023-11-19 07:59:21,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.121212121212121) internal successors, (103), 33 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) [2023-11-19 07:59:21,423 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 279 transitions. [2023-11-19 07:59:21,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-11-19 07:59:21,427 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:59:21,427 INFO L195 NwaCegarLoop]: trace histogram [31, 30, 30, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:59:21,453 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcb639e4-6102-48f5-84bd-3e16d2dd0488/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:59:21,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcb639e4-6102-48f5-84bd-3e16d2dd0488/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:59:21,644 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:59:21,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:59:21,645 INFO L85 PathProgramCache]: Analyzing trace with hash -485334593, now seen corresponding path program 3 times [2023-11-19 07:59:21,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:59:21,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329091082] [2023-11-19 07:59:21,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:59:21,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:59:21,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:59:23,011 INFO L134 CoverageAnalysis]: Checked inductivity of 1368 backedges. 0 proven. 1365 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 07:59:23,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:59:23,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329091082] [2023-11-19 07:59:23,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329091082] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:59:23,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609432616] [2023-11-19 07:59:23,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 07:59:23,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:59:23,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcb639e4-6102-48f5-84bd-3e16d2dd0488/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:59:23,014 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcb639e4-6102-48f5-84bd-3e16d2dd0488/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:59:23,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcb639e4-6102-48f5-84bd-3e16d2dd0488/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:59:39,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 31 check-sat command(s) [2023-11-19 07:59:39,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:59:39,284 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-19 07:59:39,289 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:59:39,458 INFO L134 CoverageAnalysis]: Checked inductivity of 1368 backedges. 0 proven. 1365 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 07:59:39,458 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:59:41,090 INFO L134 CoverageAnalysis]: Checked inductivity of 1368 backedges. 0 proven. 1365 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 07:59:41,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609432616] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:59:41,091 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:59:41,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 65 [2023-11-19 07:59:41,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547678993] [2023-11-19 07:59:41,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:59:41,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2023-11-19 07:59:41,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:59:41,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2023-11-19 07:59:41,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2023-11-19 07:59:41,097 INFO L87 Difference]: Start difference. First operand 249 states and 279 transitions. Second operand has 65 states, 65 states have (on average 3.0615384615384613) internal successors, (199), 65 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:42,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:59:42,673 INFO L93 Difference]: Finished difference Result 781 states and 876 transitions. [2023-11-19 07:59:42,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-11-19 07:59:42,675 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 3.0615384615384613) internal successors, (199), 65 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2023-11-19 07:59:42,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:59:42,679 INFO L225 Difference]: With dead ends: 781 [2023-11-19 07:59:42,679 INFO L226 Difference]: Without dead ends: 626 [2023-11-19 07:59:42,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2023-11-19 07:59:42,683 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 1328 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 258 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1328 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 258 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-19 07:59:42,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1328 Valid, 261 Invalid, 648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [258 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-19 07:59:42,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2023-11-19 07:59:42,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 505. [2023-11-19 07:59:42,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 504 states have (on average 1.125) internal successors, (567), 504 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:42,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 567 transitions. [2023-11-19 07:59:42,753 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 567 transitions. Word has length 104 [2023-11-19 07:59:42,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:59:42,754 INFO L495 AbstractCegarLoop]: Abstraction has 505 states and 567 transitions. [2023-11-19 07:59:42,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 3.0615384615384613) internal successors, (199), 65 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:42,754 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 567 transitions. [2023-11-19 07:59:42,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2023-11-19 07:59:42,758 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:59:42,758 INFO L195 NwaCegarLoop]: trace histogram [63, 62, 62, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:59:42,790 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcb639e4-6102-48f5-84bd-3e16d2dd0488/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 07:59:42,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcb639e4-6102-48f5-84bd-3e16d2dd0488/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:59:42,984 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:59:42,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:59:42,985 INFO L85 PathProgramCache]: Analyzing trace with hash -502364737, now seen corresponding path program 4 times [2023-11-19 07:59:42,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:59:42,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288186659] [2023-11-19 07:59:42,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:59:42,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:59:43,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:59:47,101 INFO L134 CoverageAnalysis]: Checked inductivity of 5800 backedges. 0 proven. 5797 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 07:59:47,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:59:47,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288186659] [2023-11-19 07:59:47,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288186659] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:59:47,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108908171] [2023-11-19 07:59:47,102 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 07:59:47,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:59:47,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcb639e4-6102-48f5-84bd-3e16d2dd0488/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:59:47,104 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcb639e4-6102-48f5-84bd-3e16d2dd0488/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:59:47,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcb639e4-6102-48f5-84bd-3e16d2dd0488/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 07:59:47,290 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 07:59:47,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:59:47,294 INFO L262 TraceCheckSpWp]: Trace formula consists of 552 conjuncts, 64 conjunts are in the unsatisfiable core [2023-11-19 07:59:47,315 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:59:47,630 INFO L134 CoverageAnalysis]: Checked inductivity of 5800 backedges. 0 proven. 5797 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 07:59:47,630 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:59:53,177 INFO L134 CoverageAnalysis]: Checked inductivity of 5800 backedges. 0 proven. 5797 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 07:59:53,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108908171] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:59:53,181 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:59:53,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 129 [2023-11-19 07:59:53,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287601660] [2023-11-19 07:59:53,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:59:53,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2023-11-19 07:59:53,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:59:53,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2023-11-19 07:59:53,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8256, Invalid=8256, Unknown=0, NotChecked=0, Total=16512 [2023-11-19 07:59:53,201 INFO L87 Difference]: Start difference. First operand 505 states and 567 transitions. Second operand has 129 states, 129 states have (on average 3.0310077519379846) internal successors, (391), 129 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)