./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/vogal-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d714128d-e14c-4640-8ed6-b460fb12fe7d/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d714128d-e14c-4640-8ed6-b460fb12fe7d/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_d714128d-e14c-4640-8ed6-b460fb12fe7d/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d714128d-e14c-4640-8ed6-b460fb12fe7d/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops/vogal-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d714128d-e14c-4640-8ed6-b460fb12fe7d/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_d714128d-e14c-4640-8ed6-b460fb12fe7d/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 d71e1bf3f69689e919d6628cf273516827c854b2b9e73a5faa1a7ff2c381c776 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:43:57,930 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:43:57,999 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d714128d-e14c-4640-8ed6-b460fb12fe7d/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:43:58,004 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:43:58,005 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:43:58,031 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:43:58,031 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:43:58,032 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:43:58,033 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:43:58,033 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:43:58,034 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:43:58,035 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:43:58,035 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:43:58,036 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:43:58,036 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:43:58,037 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:43:58,037 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:43:58,038 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:43:58,038 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:43:58,039 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:43:58,040 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:43:58,048 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:43:58,048 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:43:58,049 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:43:58,049 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:43:58,050 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:43:58,050 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:43:58,050 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:43:58,051 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:43:58,051 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:43:58,052 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:43:58,052 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:43:58,053 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:43:58,053 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:43:58,053 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:43:58,054 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:43:58,054 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:43:58,055 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:43:58,055 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:43:58,056 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_d714128d-e14c-4640-8ed6-b460fb12fe7d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d714128d-e14c-4640-8ed6-b460fb12fe7d/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d71e1bf3f69689e919d6628cf273516827c854b2b9e73a5faa1a7ff2c381c776 [2023-11-19 07:43:58,349 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:43:58,382 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:43:58,385 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:43:58,388 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:43:58,388 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:43:58,389 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d714128d-e14c-4640-8ed6-b460fb12fe7d/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/loops/vogal-2.i [2023-11-19 07:44:01,506 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:44:01,730 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:44:01,731 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d714128d-e14c-4640-8ed6-b460fb12fe7d/sv-benchmarks/c/loops/vogal-2.i [2023-11-19 07:44:01,739 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d714128d-e14c-4640-8ed6-b460fb12fe7d/bin/uautomizer-verify-uCwYo4JHxu/data/6550621f2/19a537bbddf643e58529783e2e229a12/FLAG57ad6cf89 [2023-11-19 07:44:01,754 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d714128d-e14c-4640-8ed6-b460fb12fe7d/bin/uautomizer-verify-uCwYo4JHxu/data/6550621f2/19a537bbddf643e58529783e2e229a12 [2023-11-19 07:44:01,756 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:44:01,758 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:44:01,760 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:44:01,760 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:44:01,775 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:44:01,779 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:44:01" (1/1) ... [2023-11-19 07:44:01,780 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79dcfe41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:01, skipping insertion in model container [2023-11-19 07:44:01,780 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:44:01" (1/1) ... [2023-11-19 07:44:01,803 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:44:01,951 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_d714128d-e14c-4640-8ed6-b460fb12fe7d/sv-benchmarks/c/loops/vogal-2.i[808,821] [2023-11-19 07:44:01,975 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:44:01,984 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:44:01,997 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_d714128d-e14c-4640-8ed6-b460fb12fe7d/sv-benchmarks/c/loops/vogal-2.i[808,821] [2023-11-19 07:44:02,011 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:44:02,027 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:44:02,027 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:02 WrapperNode [2023-11-19 07:44:02,028 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:44:02,029 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:44:02,029 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:44:02,029 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:44:02,037 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:02" (1/1) ... [2023-11-19 07:44:02,045 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:02" (1/1) ... [2023-11-19 07:44:02,070 INFO L138 Inliner]: procedures = 16, calls = 32, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 124 [2023-11-19 07:44:02,070 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:44:02,071 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:44:02,071 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:44:02,072 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:44:02,081 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:02" (1/1) ... [2023-11-19 07:44:02,082 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:02" (1/1) ... [2023-11-19 07:44:02,085 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:02" (1/1) ... [2023-11-19 07:44:02,085 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:02" (1/1) ... [2023-11-19 07:44:02,093 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:02" (1/1) ... [2023-11-19 07:44:02,108 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:02" (1/1) ... [2023-11-19 07:44:02,112 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:02" (1/1) ... [2023-11-19 07:44:02,114 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:02" (1/1) ... [2023-11-19 07:44:02,116 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:44:02,117 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:44:02,117 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:44:02,117 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:44:02,118 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:02" (1/1) ... [2023-11-19 07:44:02,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:44:02,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d714128d-e14c-4640-8ed6-b460fb12fe7d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:44:02,154 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d714128d-e14c-4640-8ed6-b460fb12fe7d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:44:02,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d714128d-e14c-4640-8ed6-b460fb12fe7d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:44:02,196 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:44:02,196 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:44:02,197 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:44:02,197 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:44:02,197 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:44:02,197 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:44:02,198 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:44:02,198 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:44:02,276 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:44:02,278 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:44:02,530 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:44:02,538 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:44:02,538 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-19 07:44:02,541 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:44:02 BoogieIcfgContainer [2023-11-19 07:44:02,541 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:44:02,544 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:44:02,544 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:44:02,547 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:44:02,547 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:44:01" (1/3) ... [2023-11-19 07:44:02,548 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59edd994 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:44:02, skipping insertion in model container [2023-11-19 07:44:02,548 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:44:02" (2/3) ... [2023-11-19 07:44:02,548 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59edd994 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:44:02, skipping insertion in model container [2023-11-19 07:44:02,548 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:44:02" (3/3) ... [2023-11-19 07:44:02,549 INFO L112 eAbstractionObserver]: Analyzing ICFG vogal-2.i [2023-11-19 07:44:02,565 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:44:02,565 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:44:02,610 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:44:02,621 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;@653c07e6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:44:02,622 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 07:44:02,628 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states 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 07:44:02,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-19 07:44:02,635 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:44:02,635 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:44:02,636 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:44:02,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:44:02,641 INFO L85 PathProgramCache]: Analyzing trace with hash -814739894, now seen corresponding path program 1 times [2023-11-19 07:44:02,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:44:02,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445970195] [2023-11-19 07:44:02,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:02,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:44:02,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:02,829 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 07:44:02,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:44:02,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445970195] [2023-11-19 07:44:02,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445970195] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:44:02,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:44:02,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:44:02,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31727151] [2023-11-19 07:44:02,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:44:02,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 07:44:02,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:44:02,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 07:44:02,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:44:02,874 INFO L87 Difference]: Start difference. First operand has 28 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 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 6.0) internal successors, (12), 2 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) [2023-11-19 07:44:02,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:44:02,891 INFO L93 Difference]: Finished difference Result 52 states and 78 transitions. [2023-11-19 07:44:02,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 07:44:02,893 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 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 [2023-11-19 07:44:02,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:44:02,901 INFO L225 Difference]: With dead ends: 52 [2023-11-19 07:44:02,901 INFO L226 Difference]: Without dead ends: 24 [2023-11-19 07:44:02,904 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 07:44:02,908 INFO L413 NwaCegarLoop]: 35 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, 35 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 07:44:02,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:44:02,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-11-19 07:44:02,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-11-19 07:44:02,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 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) [2023-11-19 07:44:02,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2023-11-19 07:44:02,942 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 12 [2023-11-19 07:44:02,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:44:02,943 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2023-11-19 07:44:02,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 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) [2023-11-19 07:44:02,944 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2023-11-19 07:44:02,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-19 07:44:02,944 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:44:02,945 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:44:02,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:44:02,945 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:44:02,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:44:02,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1144484620, now seen corresponding path program 1 times [2023-11-19 07:44:02,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:44:02,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917934946] [2023-11-19 07:44:02,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:02,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:44:03,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:03,230 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 07:44:03,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:44:03,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917934946] [2023-11-19 07:44:03,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917934946] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:44:03,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:44:03,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:44:03,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899470554] [2023-11-19 07:44:03,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:44:03,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:44:03,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:44:03,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:44:03,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:44:03,235 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 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) [2023-11-19 07:44:03,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:44:03,307 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2023-11-19 07:44:03,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:44:03,307 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 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 [2023-11-19 07:44:03,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:44:03,308 INFO L225 Difference]: With dead ends: 62 [2023-11-19 07:44:03,309 INFO L226 Difference]: Without dead ends: 42 [2023-11-19 07:44:03,309 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 07:44:03,311 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 19 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:44:03,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 40 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:44:03,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-11-19 07:44:03,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 25. [2023-11-19 07:44:03,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 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) [2023-11-19 07:44:03,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2023-11-19 07:44:03,318 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 14 [2023-11-19 07:44:03,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:44:03,318 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2023-11-19 07:44:03,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 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) [2023-11-19 07:44:03,319 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2023-11-19 07:44:03,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-19 07:44:03,319 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:44:03,320 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:44:03,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:44:03,320 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:44:03,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:44:03,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1978272138, now seen corresponding path program 1 times [2023-11-19 07:44:03,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:44:03,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248259875] [2023-11-19 07:44:03,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:03,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:44:03,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:03,535 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 07:44:03,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:44:03,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248259875] [2023-11-19 07:44:03,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248259875] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:44:03,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556884380] [2023-11-19 07:44:03,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:03,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:03,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d714128d-e14c-4640-8ed6-b460fb12fe7d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:44:03,539 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d714128d-e14c-4640-8ed6-b460fb12fe7d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:44:03,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d714128d-e14c-4640-8ed6-b460fb12fe7d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:44:03,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:03,643 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-19 07:44:03,648 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:44:03,760 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:44:03,760 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:44:03,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556884380] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:44:03,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:44:03,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2023-11-19 07:44:03,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669161682] [2023-11-19 07:44:03,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:44:03,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:44:03,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:44:03,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:44:03,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:44:03,764 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 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 07:44:03,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:44:03,815 INFO L93 Difference]: Finished difference Result 51 states and 65 transitions. [2023-11-19 07:44:03,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:44:03,816 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 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 [2023-11-19 07:44:03,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:44:03,817 INFO L225 Difference]: With dead ends: 51 [2023-11-19 07:44:03,817 INFO L226 Difference]: Without dead ends: 47 [2023-11-19 07:44:03,818 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:44:03,820 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 26 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:44:03,820 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 120 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:44:03,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-11-19 07:44:03,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 37. [2023-11-19 07:44:03,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 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) [2023-11-19 07:44:03,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 49 transitions. [2023-11-19 07:44:03,828 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 49 transitions. Word has length 16 [2023-11-19 07:44:03,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:44:03,829 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 49 transitions. [2023-11-19 07:44:03,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 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 07:44:03,829 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 49 transitions. [2023-11-19 07:44:03,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-19 07:44:03,830 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:44:03,830 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:44:03,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d714128d-e14c-4640-8ed6-b460fb12fe7d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:44:04,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d714128d-e14c-4640-8ed6-b460fb12fe7d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:04,051 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:44:04,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:44:04,052 INFO L85 PathProgramCache]: Analyzing trace with hash -35626147, now seen corresponding path program 1 times [2023-11-19 07:44:04,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:44:04,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042536070] [2023-11-19 07:44:04,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:04,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:44:04,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:04,291 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:44:04,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:44:04,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042536070] [2023-11-19 07:44:04,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042536070] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:44:04,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243381458] [2023-11-19 07:44:04,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:04,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:04,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d714128d-e14c-4640-8ed6-b460fb12fe7d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:44:04,300 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d714128d-e14c-4640-8ed6-b460fb12fe7d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:44:04,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d714128d-e14c-4640-8ed6-b460fb12fe7d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:44:04,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:04,399 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 07:44:04,401 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:44:04,445 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:44:04,445 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:44:04,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243381458] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:44:04,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:44:04,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-11-19 07:44:04,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242982055] [2023-11-19 07:44:04,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:44:04,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:44:04,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:44:04,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:44:04,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:44:04,448 INFO L87 Difference]: Start difference. First operand 37 states and 49 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:04,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:44:04,518 INFO L93 Difference]: Finished difference Result 96 states and 128 transitions. [2023-11-19 07:44:04,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:44:04,519 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-11-19 07:44:04,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:44:04,520 INFO L225 Difference]: With dead ends: 96 [2023-11-19 07:44:04,520 INFO L226 Difference]: Without dead ends: 68 [2023-11-19 07:44:04,521 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:44:04,522 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 21 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:44:04,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 70 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:44:04,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-11-19 07:44:04,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 41. [2023-11-19 07:44:04,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.35) internal successors, (54), 40 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:04,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 54 transitions. [2023-11-19 07:44:04,530 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 54 transitions. Word has length 22 [2023-11-19 07:44:04,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:44:04,531 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 54 transitions. [2023-11-19 07:44:04,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:04,531 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 54 transitions. [2023-11-19 07:44:04,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-19 07:44:04,532 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:44:04,532 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:44:04,557 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d714128d-e14c-4640-8ed6-b460fb12fe7d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:44:04,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d714128d-e14c-4640-8ed6-b460fb12fe7d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:04,753 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:44:04,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:44:04,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1865102999, now seen corresponding path program 1 times [2023-11-19 07:44:04,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:44:04,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035325827] [2023-11-19 07:44:04,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:04,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:44:04,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:04,949 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 07:44:04,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:44:04,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035325827] [2023-11-19 07:44:04,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035325827] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:44:04,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456166822] [2023-11-19 07:44:04,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:04,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:04,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d714128d-e14c-4640-8ed6-b460fb12fe7d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:44:04,961 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d714128d-e14c-4640-8ed6-b460fb12fe7d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:44:04,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d714128d-e14c-4640-8ed6-b460fb12fe7d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:44:05,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:05,041 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-19 07:44:05,044 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:44:05,200 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:44:05,200 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:44:05,401 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-11-19 07:44:05,402 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 30 [2023-11-19 07:44:05,428 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:44:05,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456166822] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 07:44:05,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:44:05,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [4, 9] total 16 [2023-11-19 07:44:05,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575685445] [2023-11-19 07:44:05,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:44:05,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:44:05,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:44:05,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:44:05,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2023-11-19 07:44:05,433 INFO L87 Difference]: Start difference. First operand 41 states and 54 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 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 07:44:05,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:44:05,636 INFO L93 Difference]: Finished difference Result 68 states and 85 transitions. [2023-11-19 07:44:05,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 07:44:05,637 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-11-19 07:44:05,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:44:05,638 INFO L225 Difference]: With dead ends: 68 [2023-11-19 07:44:05,638 INFO L226 Difference]: Without dead ends: 47 [2023-11-19 07:44:05,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2023-11-19 07:44:05,639 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 16 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:44:05,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 176 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:44:05,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-11-19 07:44:05,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 39. [2023-11-19 07:44:05,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.3421052631578947) internal successors, (51), 38 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:05,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 51 transitions. [2023-11-19 07:44:05,647 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 51 transitions. Word has length 23 [2023-11-19 07:44:05,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:44:05,648 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 51 transitions. [2023-11-19 07:44:05,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 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 07:44:05,648 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 51 transitions. [2023-11-19 07:44:05,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-19 07:44:05,649 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:44:05,649 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:44:05,668 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d714128d-e14c-4640-8ed6-b460fb12fe7d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:44:05,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d714128d-e14c-4640-8ed6-b460fb12fe7d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:05,868 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:44:05,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:44:05,868 INFO L85 PathProgramCache]: Analyzing trace with hash 350629058, now seen corresponding path program 1 times [2023-11-19 07:44:05,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:44:05,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555305090] [2023-11-19 07:44:05,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:05,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:44:05,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:05,956 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 07:44:05,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:44:05,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555305090] [2023-11-19 07:44:05,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555305090] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:44:05,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296970292] [2023-11-19 07:44:05,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:05,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:05,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d714128d-e14c-4640-8ed6-b460fb12fe7d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:44:05,958 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d714128d-e14c-4640-8ed6-b460fb12fe7d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:44:05,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d714128d-e14c-4640-8ed6-b460fb12fe7d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:44:06,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:06,034 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-19 07:44:06,037 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:44:06,202 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2023-11-19 07:44:06,211 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:44:06,211 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:44:06,341 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-11-19 07:44:06,341 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 31 [2023-11-19 07:44:06,367 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 07:44:06,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296970292] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:44:06,367 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:44:06,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 9, 7] total 15 [2023-11-19 07:44:06,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575007136] [2023-11-19 07:44:06,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:44:06,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-19 07:44:06,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:44:06,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-19 07:44:06,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2023-11-19 07:44:06,372 INFO L87 Difference]: Start difference. First operand 39 states and 51 transitions. Second operand has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 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) [2023-11-19 07:44:06,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:44:06,680 INFO L93 Difference]: Finished difference Result 168 states and 224 transitions. [2023-11-19 07:44:06,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-19 07:44:06,681 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 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 24 [2023-11-19 07:44:06,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:44:06,686 INFO L225 Difference]: With dead ends: 168 [2023-11-19 07:44:06,686 INFO L226 Difference]: Without dead ends: 134 [2023-11-19 07:44:06,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2023-11-19 07:44:06,690 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 198 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:44:06,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 151 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:44:06,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2023-11-19 07:44:06,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 43. [2023-11-19 07:44:06,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.3095238095238095) internal successors, (55), 42 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 07:44:06,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 55 transitions. [2023-11-19 07:44:06,718 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 55 transitions. Word has length 24 [2023-11-19 07:44:06,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:44:06,719 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 55 transitions. [2023-11-19 07:44:06,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 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) [2023-11-19 07:44:06,719 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 55 transitions. [2023-11-19 07:44:06,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-19 07:44:06,720 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:44:06,720 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:44:06,745 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d714128d-e14c-4640-8ed6-b460fb12fe7d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:44:06,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d714128d-e14c-4640-8ed6-b460fb12fe7d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:06,941 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:44:06,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:44:06,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1327832546, now seen corresponding path program 1 times [2023-11-19 07:44:06,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:44:06,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186643759] [2023-11-19 07:44:06,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:06,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:44:06,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:07,070 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-19 07:44:07,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:44:07,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186643759] [2023-11-19 07:44:07,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186643759] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:44:07,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662637300] [2023-11-19 07:44:07,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:07,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:07,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d714128d-e14c-4640-8ed6-b460fb12fe7d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:44:07,072 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d714128d-e14c-4640-8ed6-b460fb12fe7d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:44:07,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d714128d-e14c-4640-8ed6-b460fb12fe7d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:44:07,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:07,149 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-19 07:44:07,151 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:44:07,175 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:44:07,175 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:44:07,200 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 07:44:07,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662637300] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:44:07,201 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:44:07,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 4] total 9 [2023-11-19 07:44:07,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148275723] [2023-11-19 07:44:07,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:44:07,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-19 07:44:07,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:44:07,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-19 07:44:07,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-11-19 07:44:07,203 INFO L87 Difference]: Start difference. First operand 43 states and 55 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:07,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:44:07,675 INFO L93 Difference]: Finished difference Result 318 states and 471 transitions. [2023-11-19 07:44:07,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-19 07:44:07,676 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-11-19 07:44:07,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:44:07,678 INFO L225 Difference]: With dead ends: 318 [2023-11-19 07:44:07,678 INFO L226 Difference]: Without dead ends: 282 [2023-11-19 07:44:07,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2023-11-19 07:44:07,679 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 345 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 07:44:07,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [345 Valid, 154 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 07:44:07,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2023-11-19 07:44:07,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 73. [2023-11-19 07:44:07,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.2916666666666667) internal successors, (93), 72 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:07,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 93 transitions. [2023-11-19 07:44:07,702 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 93 transitions. Word has length 27 [2023-11-19 07:44:07,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:44:07,703 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 93 transitions. [2023-11-19 07:44:07,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:07,703 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 93 transitions. [2023-11-19 07:44:07,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-19 07:44:07,704 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:44:07,705 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:44:07,732 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d714128d-e14c-4640-8ed6-b460fb12fe7d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 07:44:07,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d714128d-e14c-4640-8ed6-b460fb12fe7d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:07,932 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:44:07,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:44:07,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1303869421, now seen corresponding path program 2 times [2023-11-19 07:44:07,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:44:07,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872428174] [2023-11-19 07:44:07,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:07,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:44:07,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:08,126 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-19 07:44:08,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:44:08,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872428174] [2023-11-19 07:44:08,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872428174] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:44:08,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139821376] [2023-11-19 07:44:08,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:44:08,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:08,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d714128d-e14c-4640-8ed6-b460fb12fe7d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:44:08,128 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d714128d-e14c-4640-8ed6-b460fb12fe7d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:44:08,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d714128d-e14c-4640-8ed6-b460fb12fe7d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 07:44:08,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:44:08,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:44:08,231 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-19 07:44:08,235 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:44:08,259 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-19 07:44:08,260 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:44:08,396 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 07:44:08,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139821376] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:44:08,396 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:44:08,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 10] total 15 [2023-11-19 07:44:08,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662262385] [2023-11-19 07:44:08,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:44:08,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-19 07:44:08,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:44:08,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-19 07:44:08,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2023-11-19 07:44:08,400 INFO L87 Difference]: Start difference. First operand 73 states and 93 transitions. Second operand has 15 states, 15 states have (on average 3.2) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:09,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:44:09,202 INFO L93 Difference]: Finished difference Result 585 states and 771 transitions. [2023-11-19 07:44:09,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-19 07:44:09,203 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2023-11-19 07:44:09,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:44:09,207 INFO L225 Difference]: With dead ends: 585 [2023-11-19 07:44:09,207 INFO L226 Difference]: Without dead ends: 521 [2023-11-19 07:44:09,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=182, Invalid=468, Unknown=0, NotChecked=0, Total=650 [2023-11-19 07:44:09,209 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 388 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 07:44:09,210 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [388 Valid, 438 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 07:44:09,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2023-11-19 07:44:09,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 83. [2023-11-19 07:44:09,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.2560975609756098) internal successors, (103), 82 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 07:44:09,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 103 transitions. [2023-11-19 07:44:09,245 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 103 transitions. Word has length 38 [2023-11-19 07:44:09,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:44:09,245 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 103 transitions. [2023-11-19 07:44:09,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:09,245 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 103 transitions. [2023-11-19 07:44:09,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-11-19 07:44:09,247 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:44:09,247 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:44:09,273 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d714128d-e14c-4640-8ed6-b460fb12fe7d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 07:44:09,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d714128d-e14c-4640-8ed6-b460fb12fe7d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:09,468 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:44:09,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:44:09,469 INFO L85 PathProgramCache]: Analyzing trace with hash -1876175753, now seen corresponding path program 3 times [2023-11-19 07:44:09,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:44:09,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757591627] [2023-11-19 07:44:09,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:09,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:44:09,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:09,839 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-19 07:44:09,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:44:09,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757591627] [2023-11-19 07:44:09,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757591627] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:44:09,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562845216] [2023-11-19 07:44:09,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 07:44:09,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:09,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d714128d-e14c-4640-8ed6-b460fb12fe7d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:44:09,841 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d714128d-e14c-4640-8ed6-b460fb12fe7d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:44:09,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d714128d-e14c-4640-8ed6-b460fb12fe7d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 07:44:09,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-19 07:44:09,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:44:09,942 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-19 07:44:09,945 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:44:09,959 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-19 07:44:09,983 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:44:09,984 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 7 [2023-11-19 07:44:10,031 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2023-11-19 07:44:10,031 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:44:10,165 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2023-11-19 07:44:10,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562845216] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:44:10,165 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:44:10,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 6] total 19 [2023-11-19 07:44:10,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756845131] [2023-11-19 07:44:10,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:44:10,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-19 07:44:10,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:44:10,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-19 07:44:10,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2023-11-19 07:44:10,168 INFO L87 Difference]: Start difference. First operand 83 states and 103 transitions. Second operand has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 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) [2023-11-19 07:44:13,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:44:13,617 INFO L93 Difference]: Finished difference Result 2272 states and 2961 transitions. [2023-11-19 07:44:13,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2023-11-19 07:44:13,618 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 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 48 [2023-11-19 07:44:13,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:44:13,630 INFO L225 Difference]: With dead ends: 2272 [2023-11-19 07:44:13,631 INFO L226 Difference]: Without dead ends: 2208 [2023-11-19 07:44:13,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2110 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=813, Invalid=5993, Unknown=0, NotChecked=0, Total=6806 [2023-11-19 07:44:13,636 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 1597 mSDsluCounter, 2001 mSDsCounter, 0 mSdLazyCounter, 1338 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1597 SdHoareTripleChecker+Valid, 2183 SdHoareTripleChecker+Invalid, 1452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:44:13,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1597 Valid, 2183 Invalid, 1452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1338 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-19 07:44:13,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2208 states. [2023-11-19 07:44:13,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2208 to 111. [2023-11-19 07:44:13,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.2636363636363637) internal successors, (139), 110 states have internal predecessors, (139), 0 states have call successors, (0), 0 states 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 07:44:13,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 139 transitions. [2023-11-19 07:44:13,699 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 139 transitions. Word has length 48 [2023-11-19 07:44:13,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:44:13,700 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 139 transitions. [2023-11-19 07:44:13,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 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) [2023-11-19 07:44:13,700 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 139 transitions. [2023-11-19 07:44:13,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-19 07:44:13,702 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:44:13,702 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 5, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:44:13,727 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d714128d-e14c-4640-8ed6-b460fb12fe7d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 07:44:13,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d714128d-e14c-4640-8ed6-b460fb12fe7d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:13,916 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:44:13,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:44:13,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1087324312, now seen corresponding path program 4 times [2023-11-19 07:44:13,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:44:13,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491036145] [2023-11-19 07:44:13,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:13,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:44:13,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:14,302 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-11-19 07:44:14,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:44:14,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491036145] [2023-11-19 07:44:14,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491036145] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:44:14,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127450425] [2023-11-19 07:44:14,303 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 07:44:14,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:14,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d714128d-e14c-4640-8ed6-b460fb12fe7d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:44:14,304 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d714128d-e14c-4640-8ed6-b460fb12fe7d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:44:14,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d714128d-e14c-4640-8ed6-b460fb12fe7d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 07:44:14,427 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 07:44:14,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:44:14,429 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-19 07:44:14,438 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:44:14,531 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 2 proven. 83 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-19 07:44:14,531 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:44:14,664 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2023-11-19 07:44:14,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127450425] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:44:14,664 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:44:14,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 7] total 22 [2023-11-19 07:44:14,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863496478] [2023-11-19 07:44:14,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:44:14,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-19 07:44:14,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:44:14,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-19 07:44:14,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2023-11-19 07:44:14,666 INFO L87 Difference]: Start difference. First operand 111 states and 139 transitions. Second operand has 22 states, 22 states have (on average 3.6363636363636362) internal successors, (80), 22 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:20,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:44:20,930 INFO L93 Difference]: Finished difference Result 1584 states and 2370 transitions. [2023-11-19 07:44:20,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2023-11-19 07:44:20,930 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.6363636363636362) internal successors, (80), 22 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2023-11-19 07:44:20,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:44:20,939 INFO L225 Difference]: With dead ends: 1584 [2023-11-19 07:44:20,939 INFO L226 Difference]: Without dead ends: 1494 [2023-11-19 07:44:20,946 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5718 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2018, Invalid=13732, Unknown=0, NotChecked=0, Total=15750 [2023-11-19 07:44:20,947 INFO L413 NwaCegarLoop]: 248 mSDtfsCounter, 2582 mSDsluCounter, 3047 mSDsCounter, 0 mSdLazyCounter, 3805 mSolverCounterSat, 435 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2582 SdHoareTripleChecker+Valid, 3295 SdHoareTripleChecker+Invalid, 4240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 435 IncrementalHoareTripleChecker+Valid, 3805 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-11-19 07:44:20,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2582 Valid, 3295 Invalid, 4240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [435 Valid, 3805 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-11-19 07:44:20,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1494 states. [2023-11-19 07:44:21,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1494 to 221. [2023-11-19 07:44:21,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 1.2954545454545454) internal successors, (285), 220 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:21,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 285 transitions. [2023-11-19 07:44:21,060 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 285 transitions. Word has length 56 [2023-11-19 07:44:21,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:44:21,060 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 285 transitions. [2023-11-19 07:44:21,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.6363636363636362) internal successors, (80), 22 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:21,061 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 285 transitions. [2023-11-19 07:44:21,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-11-19 07:44:21,063 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:44:21,064 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:44:21,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d714128d-e14c-4640-8ed6-b460fb12fe7d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-19 07:44:21,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d714128d-e14c-4640-8ed6-b460fb12fe7d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:21,292 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:44:21,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:44:21,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1397083786, now seen corresponding path program 5 times [2023-11-19 07:44:21,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:44:21,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976308189] [2023-11-19 07:44:21,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:21,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:44:21,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:21,820 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2023-11-19 07:44:21,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:44:21,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976308189] [2023-11-19 07:44:21,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976308189] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:44:21,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599239295] [2023-11-19 07:44:21,820 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-19 07:44:21,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:21,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d714128d-e14c-4640-8ed6-b460fb12fe7d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:44:21,824 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d714128d-e14c-4640-8ed6-b460fb12fe7d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:44:21,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d714128d-e14c-4640-8ed6-b460fb12fe7d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 07:44:22,650 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2023-11-19 07:44:22,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:44:22,653 INFO L262 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-19 07:44:22,660 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:44:23,141 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2023-11-19 07:44:23,155 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2023-11-19 07:44:23,155 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:44:23,909 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-11-19 07:44:23,909 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 31 [2023-11-19 07:44:23,973 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 39 proven. 14 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2023-11-19 07:44:23,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599239295] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:44:23,973 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:44:23,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 11] total 28 [2023-11-19 07:44:23,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755588699] [2023-11-19 07:44:23,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:44:23,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-19 07:44:23,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:44:23,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-19 07:44:23,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2023-11-19 07:44:23,976 INFO L87 Difference]: Start difference. First operand 221 states and 285 transitions. Second operand has 28 states, 28 states have (on average 2.9642857142857144) internal successors, (83), 28 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:27,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:44:27,523 INFO L93 Difference]: Finished difference Result 2367 states and 3146 transitions. [2023-11-19 07:44:27,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-11-19 07:44:27,524 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.9642857142857144) internal successors, (83), 28 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2023-11-19 07:44:27,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:44:27,537 INFO L225 Difference]: With dead ends: 2367 [2023-11-19 07:44:27,537 INFO L226 Difference]: Without dead ends: 2291 [2023-11-19 07:44:27,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1461 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=721, Invalid=4829, Unknown=0, NotChecked=0, Total=5550 [2023-11-19 07:44:27,541 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 723 mSDsluCounter, 1338 mSDsCounter, 0 mSdLazyCounter, 1463 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 723 SdHoareTripleChecker+Valid, 1450 SdHoareTripleChecker+Invalid, 1504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:44:27,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [723 Valid, 1450 Invalid, 1504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1463 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-19 07:44:27,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2291 states. [2023-11-19 07:44:27,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2291 to 346. [2023-11-19 07:44:27,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 345 states have (on average 1.3072463768115943) internal successors, (451), 345 states have internal predecessors, (451), 0 states have call successors, (0), 0 states 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 07:44:27,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 451 transitions. [2023-11-19 07:44:27,748 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 451 transitions. Word has length 76 [2023-11-19 07:44:27,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:44:27,751 INFO L495 AbstractCegarLoop]: Abstraction has 346 states and 451 transitions. [2023-11-19 07:44:27,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.9642857142857144) internal successors, (83), 28 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:44:27,751 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 451 transitions. [2023-11-19 07:44:27,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-11-19 07:44:27,756 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:44:27,756 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 8, 8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:44:27,767 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d714128d-e14c-4640-8ed6-b460fb12fe7d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-19 07:44:27,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d714128d-e14c-4640-8ed6-b460fb12fe7d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-19 07:44:27,962 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:44:27,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:44:27,963 INFO L85 PathProgramCache]: Analyzing trace with hash 64411734, now seen corresponding path program 1 times [2023-11-19 07:44:27,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:44:27,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090373210] [2023-11-19 07:44:27,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:27,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:44:28,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:30,309 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 16 proven. 77 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2023-11-19 07:44:30,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:44:30,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090373210] [2023-11-19 07:44:30,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090373210] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:44:30,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15133653] [2023-11-19 07:44:30,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:44:30,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:44:30,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d714128d-e14c-4640-8ed6-b460fb12fe7d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:44:30,312 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d714128d-e14c-4640-8ed6-b460fb12fe7d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:44:30,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d714128d-e14c-4640-8ed6-b460fb12fe7d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-19 07:44:30,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:44:30,599 INFO L262 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 96 conjunts are in the unsatisfiable core [2023-11-19 07:44:30,606 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:44:30,615 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-19 07:44:30,664 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 16 [2023-11-19 07:44:30,719 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 16 [2023-11-19 07:44:30,776 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 16 [2023-11-19 07:44:30,834 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 16 [2023-11-19 07:44:30,900 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 16 [2023-11-19 07:44:30,962 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 16 [2023-11-19 07:44:31,026 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 16 [2023-11-19 07:44:31,090 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 16 [2023-11-19 07:44:31,159 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 16 [2023-11-19 07:44:31,225 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 16 [2023-11-19 07:44:31,298 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 16 [2023-11-19 07:44:35,083 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:44:35,084 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 3 case distinctions, treesize of input 124 treesize of output 64 [2023-11-19 07:44:35,209 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 21 proven. 309 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-19 07:44:35,210 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:44:41,212 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse3 (+ 9 |c_ULTIMATE.start_main_~#vetor_vogais~0#1.offset|)) (.cse5 (+ |c_ULTIMATE.start_main_~#vetor_vogais~0#1.offset| 1))) (and (forall ((v_ArrVal_329 (Array Int Int)) (|ULTIMATE.start_main_~#string_entrada~0#1.offset| Int)) (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#string_entrada~0#1.base| v_ArrVal_329) |c_ULTIMATE.start_main_~#vetor_vogais~0#1.base|))) (let ((.cse0 (select .cse2 .cse5)) (.cse1 (select v_ArrVal_329 |ULTIMATE.start_main_~#string_entrada~0#1.offset|))) (or (< .cse0 .cse1) (forall ((v_z_2 Int)) (let ((.cse4 (select v_ArrVal_329 (+ |ULTIMATE.start_main_~#string_entrada~0#1.offset| v_z_2)))) (or (< (select .cse2 .cse3) .cse4) (< .cse4 .cse0) (< 2147483647 v_z_2) (< v_z_2 0)))) (< .cse1 (select .cse2 |c_ULTIMATE.start_main_~#vetor_vogais~0#1.offset|)))))) (forall ((v_ArrVal_329 (Array Int Int)) (|ULTIMATE.start_main_~#string_entrada~0#1.offset| Int)) (let ((.cse8 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#string_entrada~0#1.base| v_ArrVal_329) |c_ULTIMATE.start_main_~#vetor_vogais~0#1.base|))) (let ((.cse6 (select .cse8 .cse5)) (.cse7 (select v_ArrVal_329 |ULTIMATE.start_main_~#string_entrada~0#1.offset|))) (or (< .cse6 .cse7) (forall ((v_z_5 Int)) (let ((.cse9 (select v_ArrVal_329 (+ |ULTIMATE.start_main_~#string_entrada~0#1.offset| v_z_5 (- 4294967296))))) (or (< 4294967295 v_z_5) (< (select .cse8 .cse3) .cse9) (< .cse9 .cse6) (< v_z_5 2147483648)))) (< .cse7 (select .cse8 |c_ULTIMATE.start_main_~#vetor_vogais~0#1.offset|)))))))) is different from false [2023-11-19 07:44:47,539 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 70 proven. 196 refuted. 0 times theorem prover too weak. 57 trivial. 19 not checked. [2023-11-19 07:44:47,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15133653] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:44:47,539 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:44:47,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 38, 36] total 85 [2023-11-19 07:44:47,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174804066] [2023-11-19 07:44:47,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:44:47,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2023-11-19 07:44:47,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:44:47,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2023-11-19 07:44:47,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1018, Invalid=5956, Unknown=2, NotChecked=164, Total=7140 [2023-11-19 07:44:47,546 INFO L87 Difference]: Start difference. First operand 346 states and 451 transitions. Second operand has 85 states, 85 states have (on average 2.4) internal successors, (204), 85 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)