./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound1.c --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_93ab9ab1-48e8-4917-b487-a6b096fbc87d/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ab9ab1-48e8-4917-b487-a6b096fbc87d/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_93ab9ab1-48e8-4917-b487-a6b096fbc87d/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ab9ab1-48e8-4917-b487-a6b096fbc87d/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ab9ab1-48e8-4917-b487-a6b096fbc87d/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_93ab9ab1-48e8-4917-b487-a6b096fbc87d/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 45ff7b74faf4250f77b788e07275d725ea3dbcc73af0b2b0d64dcf5aa7f7b78a --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:40:42,281 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:40:42,403 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ab9ab1-48e8-4917-b487-a6b096fbc87d/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:40:42,417 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:40:42,417 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:40:42,469 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:40:42,470 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:40:42,470 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:40:42,472 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:40:42,477 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:40:42,479 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:40:42,480 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:40:42,480 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:40:42,482 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:40:42,482 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:40:42,483 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:40:42,483 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:40:42,484 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:40:42,484 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:40:42,485 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:40:42,485 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:40:42,486 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:40:42,486 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:40:42,487 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:40:42,487 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:40:42,488 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:40:42,489 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:40:42,489 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:40:42,489 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:40:42,490 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:40:42,491 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:40:42,492 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:40:42,492 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:40:42,492 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:40:42,493 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:40:42,493 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:40:42,493 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:40:42,493 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:40:42,494 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:40:42,494 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_93ab9ab1-48e8-4917-b487-a6b096fbc87d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ab9ab1-48e8-4917-b487-a6b096fbc87d/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 45ff7b74faf4250f77b788e07275d725ea3dbcc73af0b2b0d64dcf5aa7f7b78a [2023-11-19 07:40:42,773 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:40:42,795 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:40:42,798 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:40:42,799 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:40:42,800 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:40:42,801 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ab9ab1-48e8-4917-b487-a6b096fbc87d/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound1.c [2023-11-19 07:40:46,077 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:40:46,311 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:40:46,311 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ab9ab1-48e8-4917-b487-a6b096fbc87d/sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound1.c [2023-11-19 07:40:46,319 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ab9ab1-48e8-4917-b487-a6b096fbc87d/bin/uautomizer-verify-uCwYo4JHxu/data/2ec2d28ac/51615d4534694f12b2b53089e76a2ad4/FLAG9e792251a [2023-11-19 07:40:46,334 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ab9ab1-48e8-4917-b487-a6b096fbc87d/bin/uautomizer-verify-uCwYo4JHxu/data/2ec2d28ac/51615d4534694f12b2b53089e76a2ad4 [2023-11-19 07:40:46,337 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:40:46,338 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:40:46,340 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:40:46,340 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:40:46,346 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:40:46,346 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:40:46" (1/1) ... [2023-11-19 07:40:46,348 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@579636f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:46, skipping insertion in model container [2023-11-19 07:40:46,348 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:40:46" (1/1) ... [2023-11-19 07:40:46,378 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:40:46,534 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_93ab9ab1-48e8-4917-b487-a6b096fbc87d/sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound1.c[526,539] [2023-11-19 07:40:46,561 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:40:46,578 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:40:46,596 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_93ab9ab1-48e8-4917-b487-a6b096fbc87d/sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound1.c[526,539] [2023-11-19 07:40:46,603 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:40:46,618 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:40:46,619 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:46 WrapperNode [2023-11-19 07:40:46,619 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:40:46,620 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:40:46,620 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:40:46,620 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:40:46,628 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:46" (1/1) ... [2023-11-19 07:40:46,636 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:46" (1/1) ... [2023-11-19 07:40:46,662 INFO L138 Inliner]: procedures = 14, calls = 23, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 64 [2023-11-19 07:40:46,663 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:40:46,664 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:40:46,664 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:40:46,664 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:40:46,674 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:46" (1/1) ... [2023-11-19 07:40:46,675 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:46" (1/1) ... [2023-11-19 07:40:46,685 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:46" (1/1) ... [2023-11-19 07:40:46,686 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:46" (1/1) ... [2023-11-19 07:40:46,696 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:46" (1/1) ... [2023-11-19 07:40:46,701 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:46" (1/1) ... [2023-11-19 07:40:46,703 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:46" (1/1) ... [2023-11-19 07:40:46,704 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:46" (1/1) ... [2023-11-19 07:40:46,707 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:40:46,708 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:40:46,708 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:40:46,708 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:40:46,709 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:46" (1/1) ... [2023-11-19 07:40:46,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:40:46,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ab9ab1-48e8-4917-b487-a6b096fbc87d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:40:46,743 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ab9ab1-48e8-4917-b487-a6b096fbc87d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:40:46,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ab9ab1-48e8-4917-b487-a6b096fbc87d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:40:46,785 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:40:46,785 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:40:46,786 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:40:46,786 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:40:46,786 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-19 07:40:46,786 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-19 07:40:46,856 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:40:46,858 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:40:47,017 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:40:47,025 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:40:47,025 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-19 07:40:47,029 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:40:47 BoogieIcfgContainer [2023-11-19 07:40:47,029 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:40:47,032 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:40:47,032 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:40:47,036 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:40:47,036 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:40:46" (1/3) ... [2023-11-19 07:40:47,037 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@aa2f822 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:40:47, skipping insertion in model container [2023-11-19 07:40:47,037 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:46" (2/3) ... [2023-11-19 07:40:47,038 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@aa2f822 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:40:47, skipping insertion in model container [2023-11-19 07:40:47,038 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:40:47" (3/3) ... [2023-11-19 07:40:47,039 INFO L112 eAbstractionObserver]: Analyzing ICFG hard2_valuebound1.c [2023-11-19 07:40:47,060 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:40:47,060 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:40:47,110 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:40:47,118 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;@2a5b2acc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:40:47,118 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 07:40:47,122 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-19 07:40:47,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-19 07:40:47,131 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:40:47,131 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:40:47,132 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:40:47,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:47,138 INFO L85 PathProgramCache]: Analyzing trace with hash -586848446, now seen corresponding path program 1 times [2023-11-19 07:40:47,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:47,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829887779] [2023-11-19 07:40:47,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:47,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:47,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:47,304 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 07:40:47,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:47,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829887779] [2023-11-19 07:40:47,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829887779] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:40:47,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:40:47,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:40:47,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531046221] [2023-11-19 07:40:47,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:40:47,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 07:40:47,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:47,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 07:40:47,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:40:47,348 INFO L87 Difference]: Start difference. First operand has 26 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:47,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:40:47,372 INFO L93 Difference]: Finished difference Result 49 states and 83 transitions. [2023-11-19 07:40:47,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 07:40:47,374 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-19 07:40:47,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:40:47,382 INFO L225 Difference]: With dead ends: 49 [2023-11-19 07:40:47,382 INFO L226 Difference]: Without dead ends: 22 [2023-11-19 07:40:47,386 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 07:40:47,390 INFO L413 NwaCegarLoop]: 34 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, 34 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 07:40:47,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:40:47,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-11-19 07:40:47,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-11-19 07:40:47,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-19 07:40:47,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 30 transitions. [2023-11-19 07:40:47,430 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 30 transitions. Word has length 9 [2023-11-19 07:40:47,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:40:47,431 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 30 transitions. [2023-11-19 07:40:47,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:47,431 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 30 transitions. [2023-11-19 07:40:47,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-19 07:40:47,433 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:40:47,433 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:40:47,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:40:47,434 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:40:47,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:47,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1188158916, now seen corresponding path program 1 times [2023-11-19 07:40:47,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:47,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411100261] [2023-11-19 07:40:47,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:47,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:47,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:47,645 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 07:40:47,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:47,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411100261] [2023-11-19 07:40:47,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411100261] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:40:47,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:40:47,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:40:47,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739639231] [2023-11-19 07:40:47,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:40:47,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:40:47,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:47,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:40:47,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:40:47,650 INFO L87 Difference]: Start difference. First operand 22 states and 30 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:47,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:40:47,719 INFO L93 Difference]: Finished difference Result 35 states and 47 transitions. [2023-11-19 07:40:47,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:40:47,720 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-19 07:40:47,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:40:47,721 INFO L225 Difference]: With dead ends: 35 [2023-11-19 07:40:47,722 INFO L226 Difference]: Without dead ends: 33 [2023-11-19 07:40:47,722 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:40:47,724 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 12 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:40:47,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 89 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:40:47,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-11-19 07:40:47,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2023-11-19 07:40:47,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-19 07:40:47,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2023-11-19 07:40:47,738 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 9 [2023-11-19 07:40:47,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:40:47,738 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2023-11-19 07:40:47,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:40:47,739 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2023-11-19 07:40:47,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-19 07:40:47,740 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:40:47,740 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:40:47,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:40:47,740 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:40:47,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:47,756 INFO L85 PathProgramCache]: Analyzing trace with hash -697944935, now seen corresponding path program 1 times [2023-11-19 07:40:47,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:47,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354831568] [2023-11-19 07:40:47,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:47,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:47,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:47,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-19 07:40:47,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:47,932 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:40:47,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:47,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354831568] [2023-11-19 07:40:47,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354831568] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:40:47,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:40:47,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:40:47,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692956748] [2023-11-19 07:40:47,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:40:47,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:40:47,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:47,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:40:47,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:40:47,936 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 07:40:48,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:40:48,023 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2023-11-19 07:40:48,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:40:48,024 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2023-11-19 07:40:48,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:40:48,025 INFO L225 Difference]: With dead ends: 39 [2023-11-19 07:40:48,025 INFO L226 Difference]: Without dead ends: 37 [2023-11-19 07:40:48,026 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:40:48,027 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 10 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:40:48,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 85 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:40:48,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-11-19 07:40:48,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2023-11-19 07:40:48,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-19 07:40:48,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2023-11-19 07:40:48,040 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 14 [2023-11-19 07:40:48,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:40:48,040 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2023-11-19 07:40:48,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 07:40:48,041 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2023-11-19 07:40:48,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-19 07:40:48,042 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:40:48,042 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:40:48,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 07:40:48,042 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:40:48,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:48,043 INFO L85 PathProgramCache]: Analyzing trace with hash 262992548, now seen corresponding path program 1 times [2023-11-19 07:40:48,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:48,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96238255] [2023-11-19 07:40:48,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:48,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:48,058 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:40:48,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2050836870] [2023-11-19 07:40:48,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:48,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:48,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ab9ab1-48e8-4917-b487-a6b096fbc87d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:40:48,061 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ab9ab1-48e8-4917-b487-a6b096fbc87d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:40:48,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ab9ab1-48e8-4917-b487-a6b096fbc87d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:40:48,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:48,142 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 07:40:48,149 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:40:48,264 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 07:40:48,264 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:40:48,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:48,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96238255] [2023-11-19 07:40:48,265 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:40:48,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050836870] [2023-11-19 07:40:48,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050836870] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:40:48,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:40:48,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:40:48,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455219824] [2023-11-19 07:40:48,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:40:48,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:40:48,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:48,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:40:48,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:40:48,269 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-19 07:40:48,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:40:48,338 INFO L93 Difference]: Finished difference Result 58 states and 76 transitions. [2023-11-19 07:40:48,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:40:48,338 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2023-11-19 07:40:48,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:40:48,340 INFO L225 Difference]: With dead ends: 58 [2023-11-19 07:40:48,340 INFO L226 Difference]: Without dead ends: 44 [2023-11-19 07:40:48,341 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:40:48,342 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 8 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:40:48,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 88 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:40:48,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-11-19 07:40:48,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2023-11-19 07:40:48,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 28 states have internal predecessors, (31), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-19 07:40:48,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 55 transitions. [2023-11-19 07:40:48,357 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 55 transitions. Word has length 19 [2023-11-19 07:40:48,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:40:48,357 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 55 transitions. [2023-11-19 07:40:48,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-19 07:40:48,358 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 55 transitions. [2023-11-19 07:40:48,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-19 07:40:48,359 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:40:48,359 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:40:48,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ab9ab1-48e8-4917-b487-a6b096fbc87d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:40:48,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ab9ab1-48e8-4917-b487-a6b096fbc87d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:48,573 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:40:48,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:48,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1807142342, now seen corresponding path program 1 times [2023-11-19 07:40:48,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:48,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088864809] [2023-11-19 07:40:48,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:48,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:48,588 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:40:48,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1960543512] [2023-11-19 07:40:48,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:48,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:48,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ab9ab1-48e8-4917-b487-a6b096fbc87d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:40:48,590 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ab9ab1-48e8-4917-b487-a6b096fbc87d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:40:48,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ab9ab1-48e8-4917-b487-a6b096fbc87d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:40:48,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:48,648 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-19 07:40:48,650 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:40:48,796 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 07:40:48,796 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:40:49,028 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 07:40:49,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:49,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088864809] [2023-11-19 07:40:49,029 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:40:49,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960543512] [2023-11-19 07:40:49,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960543512] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:40:49,030 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:40:49,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2023-11-19 07:40:49,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673322204] [2023-11-19 07:40:49,031 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:40:49,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-19 07:40:49,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:49,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-19 07:40:49,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-11-19 07:40:49,033 INFO L87 Difference]: Start difference. First operand 44 states and 55 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-19 07:40:49,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:40:49,183 INFO L93 Difference]: Finished difference Result 57 states and 72 transitions. [2023-11-19 07:40:49,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 07:40:49,184 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 26 [2023-11-19 07:40:49,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:40:49,190 INFO L225 Difference]: With dead ends: 57 [2023-11-19 07:40:49,190 INFO L226 Difference]: Without dead ends: 50 [2023-11-19 07:40:49,191 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-11-19 07:40:49,192 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 22 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:40:49,193 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 75 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:40:49,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-11-19 07:40:49,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2023-11-19 07:40:49,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 30 states have (on average 1.2) internal successors, (36), 32 states have internal predecessors, (36), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-19 07:40:49,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 61 transitions. [2023-11-19 07:40:49,209 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 61 transitions. Word has length 26 [2023-11-19 07:40:49,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:40:49,214 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 61 transitions. [2023-11-19 07:40:49,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-19 07:40:49,215 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 61 transitions. [2023-11-19 07:40:49,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-19 07:40:49,216 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:40:49,217 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:40:49,245 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ab9ab1-48e8-4917-b487-a6b096fbc87d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:40:49,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ab9ab1-48e8-4917-b487-a6b096fbc87d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:49,418 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:40:49,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:49,419 INFO L85 PathProgramCache]: Analyzing trace with hash -979933353, now seen corresponding path program 1 times [2023-11-19 07:40:49,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:49,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064937614] [2023-11-19 07:40:49,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:49,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:49,433 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:40:49,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [338031251] [2023-11-19 07:40:49,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:49,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:49,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ab9ab1-48e8-4917-b487-a6b096fbc87d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:40:49,435 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ab9ab1-48e8-4917-b487-a6b096fbc87d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:40:49,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ab9ab1-48e8-4917-b487-a6b096fbc87d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:40:49,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:49,511 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-19 07:40:49,516 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:40:49,664 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-19 07:40:49,664 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:40:49,757 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-11-19 07:40:49,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:49,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064937614] [2023-11-19 07:40:49,758 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:40:49,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338031251] [2023-11-19 07:40:49,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338031251] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 07:40:49,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:40:49,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2023-11-19 07:40:49,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85297787] [2023-11-19 07:40:49,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:40:49,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:40:49,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:49,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:40:49,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:40:49,767 INFO L87 Difference]: Start difference. First operand 49 states and 61 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-19 07:40:51,828 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-19 07:40:51,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:40:51,847 INFO L93 Difference]: Finished difference Result 61 states and 76 transitions. [2023-11-19 07:40:51,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:40:51,848 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 36 [2023-11-19 07:40:51,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:40:51,851 INFO L225 Difference]: With dead ends: 61 [2023-11-19 07:40:51,851 INFO L226 Difference]: Without dead ends: 59 [2023-11-19 07:40:51,852 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:40:51,853 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 8 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:40:51,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 81 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 1 Unknown, 0 Unchecked, 2.0s Time] [2023-11-19 07:40:51,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-11-19 07:40:51,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2023-11-19 07:40:51,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 37 states have internal predecessors, (40), 15 states have call successors, (15), 6 states have call predecessors, (15), 6 states have return successors, (14), 12 states have call predecessors, (14), 14 states have call successors, (14) [2023-11-19 07:40:51,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 69 transitions. [2023-11-19 07:40:51,869 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 69 transitions. Word has length 36 [2023-11-19 07:40:51,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:40:51,869 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 69 transitions. [2023-11-19 07:40:51,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-19 07:40:51,870 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 69 transitions. [2023-11-19 07:40:51,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-19 07:40:51,872 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:40:51,872 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:40:51,898 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ab9ab1-48e8-4917-b487-a6b096fbc87d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:40:52,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ab9ab1-48e8-4917-b487-a6b096fbc87d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-19 07:40:52,093 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:40:52,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:52,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1034157389, now seen corresponding path program 1 times [2023-11-19 07:40:52,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:52,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361040883] [2023-11-19 07:40:52,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:52,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:52,118 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:40:52,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1915105630] [2023-11-19 07:40:52,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:52,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:52,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ab9ab1-48e8-4917-b487-a6b096fbc87d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:40:52,138 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ab9ab1-48e8-4917-b487-a6b096fbc87d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:40:52,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ab9ab1-48e8-4917-b487-a6b096fbc87d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:40:52,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:52,207 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-19 07:40:52,212 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:40:52,613 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 18 proven. 26 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-11-19 07:40:52,613 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:40:54,436 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 18 proven. 26 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-11-19 07:40:54,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:54,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361040883] [2023-11-19 07:40:54,437 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:40:54,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915105630] [2023-11-19 07:40:54,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915105630] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:40:54,438 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:40:54,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2023-11-19 07:40:54,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139809756] [2023-11-19 07:40:54,440 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:40:54,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-19 07:40:54,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:54,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-19 07:40:54,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2023-11-19 07:40:54,443 INFO L87 Difference]: Start difference. First operand 56 states and 69 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 14 states have internal predecessors, (34), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2023-11-19 07:40:55,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:40:55,883 INFO L93 Difference]: Finished difference Result 136 states and 184 transitions. [2023-11-19 07:40:55,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 07:40:55,884 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 14 states have internal predecessors, (34), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 56 [2023-11-19 07:40:55,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:40:55,886 INFO L225 Difference]: With dead ends: 136 [2023-11-19 07:40:55,887 INFO L226 Difference]: Without dead ends: 107 [2023-11-19 07:40:55,888 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2023-11-19 07:40:55,889 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 46 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-19 07:40:55,889 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 199 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-19 07:40:55,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2023-11-19 07:40:55,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 102. [2023-11-19 07:40:55,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 62 states have (on average 1.2096774193548387) internal successors, (75), 67 states have internal predecessors, (75), 29 states have call successors, (29), 10 states have call predecessors, (29), 10 states have return successors, (28), 24 states have call predecessors, (28), 28 states have call successors, (28) [2023-11-19 07:40:55,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 132 transitions. [2023-11-19 07:40:55,965 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 132 transitions. Word has length 56 [2023-11-19 07:40:55,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:40:55,966 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 132 transitions. [2023-11-19 07:40:55,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 14 states have internal predecessors, (34), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2023-11-19 07:40:55,967 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 132 transitions. [2023-11-19 07:40:55,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-11-19 07:40:55,977 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:40:55,977 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:40:56,000 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ab9ab1-48e8-4917-b487-a6b096fbc87d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:40:56,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ab9ab1-48e8-4917-b487-a6b096fbc87d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-19 07:40:56,191 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:40:56,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:56,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1199454569, now seen corresponding path program 1 times [2023-11-19 07:40:56,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:56,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765956145] [2023-11-19 07:40:56,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:56,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:56,220 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:40:56,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1966259745] [2023-11-19 07:40:56,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:56,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:56,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ab9ab1-48e8-4917-b487-a6b096fbc87d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:40:56,224 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ab9ab1-48e8-4917-b487-a6b096fbc87d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:40:56,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ab9ab1-48e8-4917-b487-a6b096fbc87d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:40:56,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:56,310 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-19 07:40:56,315 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:40:56,741 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 22 proven. 34 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2023-11-19 07:40:56,746 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:40:57,694 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 22 proven. 34 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2023-11-19 07:40:57,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:57,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765956145] [2023-11-19 07:40:57,695 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:40:57,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966259745] [2023-11-19 07:40:57,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966259745] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:40:57,696 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:40:57,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2023-11-19 07:40:57,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289565623] [2023-11-19 07:40:57,697 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:40:57,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-19 07:40:57,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:57,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-19 07:40:57,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2023-11-19 07:40:57,700 INFO L87 Difference]: Start difference. First operand 102 states and 132 transitions. Second operand has 20 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 11 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 9 states have call predecessors, (20), 9 states have call successors, (20) [2023-11-19 07:40:58,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:40:58,645 INFO L93 Difference]: Finished difference Result 158 states and 210 transitions. [2023-11-19 07:40:58,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-19 07:40:58,647 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 11 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 9 states have call predecessors, (20), 9 states have call successors, (20) Word has length 67 [2023-11-19 07:40:58,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:40:58,649 INFO L225 Difference]: With dead ends: 158 [2023-11-19 07:40:58,649 INFO L226 Difference]: Without dead ends: 126 [2023-11-19 07:40:58,650 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2023-11-19 07:40:58,651 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 32 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 07:40:58,651 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 169 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 07:40:58,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2023-11-19 07:40:58,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 101. [2023-11-19 07:40:58,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 62 states have (on average 1.1612903225806452) internal successors, (72), 66 states have internal predecessors, (72), 27 states have call successors, (27), 11 states have call predecessors, (27), 11 states have return successors, (26), 23 states have call predecessors, (26), 26 states have call successors, (26) [2023-11-19 07:40:58,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 125 transitions. [2023-11-19 07:40:58,714 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 125 transitions. Word has length 67 [2023-11-19 07:40:58,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:40:58,716 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 125 transitions. [2023-11-19 07:40:58,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 11 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 9 states have call predecessors, (20), 9 states have call successors, (20) [2023-11-19 07:40:58,717 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 125 transitions. [2023-11-19 07:40:58,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-11-19 07:40:58,720 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:40:58,721 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:40:58,746 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ab9ab1-48e8-4917-b487-a6b096fbc87d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 07:40:58,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ab9ab1-48e8-4917-b487-a6b096fbc87d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:58,935 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:40:58,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:58,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1728532070, now seen corresponding path program 1 times [2023-11-19 07:40:58,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:58,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732912929] [2023-11-19 07:40:58,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:58,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:58,947 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:40:58,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [827506072] [2023-11-19 07:40:58,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:58,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:58,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ab9ab1-48e8-4917-b487-a6b096fbc87d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:40:58,964 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ab9ab1-48e8-4917-b487-a6b096fbc87d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:40:58,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ab9ab1-48e8-4917-b487-a6b096fbc87d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 07:40:59,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:59,030 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-19 07:40:59,038 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:40:59,202 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2023-11-19 07:40:59,202 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:40:59,674 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2023-11-19 07:40:59,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:59,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732912929] [2023-11-19 07:40:59,675 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:40:59,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827506072] [2023-11-19 07:40:59,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827506072] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:40:59,675 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:40:59,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2023-11-19 07:40:59,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718959391] [2023-11-19 07:40:59,676 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:40:59,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-19 07:40:59,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:59,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-19 07:40:59,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-11-19 07:40:59,678 INFO L87 Difference]: Start difference. First operand 101 states and 125 transitions. Second operand has 10 states, 8 states have (on average 3.625) internal successors, (29), 9 states have internal predecessors, (29), 6 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2023-11-19 07:40:59,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:40:59,925 INFO L93 Difference]: Finished difference Result 120 states and 144 transitions. [2023-11-19 07:40:59,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-19 07:40:59,926 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.625) internal successors, (29), 9 states have internal predecessors, (29), 6 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) Word has length 72 [2023-11-19 07:40:59,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:40:59,927 INFO L225 Difference]: With dead ends: 120 [2023-11-19 07:40:59,927 INFO L226 Difference]: Without dead ends: 93 [2023-11-19 07:40:59,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 132 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2023-11-19 07:40:59,929 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 9 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:40:59,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 152 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:40:59,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2023-11-19 07:40:59,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2023-11-19 07:40:59,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 58 states have (on average 1.1206896551724137) internal successors, (65), 61 states have internal predecessors, (65), 23 states have call successors, (23), 11 states have call predecessors, (23), 11 states have return successors, (22), 20 states have call predecessors, (22), 22 states have call successors, (22) [2023-11-19 07:40:59,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 110 transitions. [2023-11-19 07:40:59,967 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 110 transitions. Word has length 72 [2023-11-19 07:40:59,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:40:59,968 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 110 transitions. [2023-11-19 07:40:59,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.625) internal successors, (29), 9 states have internal predecessors, (29), 6 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2023-11-19 07:40:59,968 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 110 transitions. [2023-11-19 07:40:59,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-11-19 07:40:59,969 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:40:59,970 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:40:59,995 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ab9ab1-48e8-4917-b487-a6b096fbc87d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 07:41:00,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ab9ab1-48e8-4917-b487-a6b096fbc87d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:41:00,191 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:41:00,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:00,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1412721000, now seen corresponding path program 1 times [2023-11-19 07:41:00,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:00,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486158573] [2023-11-19 07:41:00,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:00,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:00,202 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:41:00,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1890713982] [2023-11-19 07:41:00,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:00,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:41:00,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ab9ab1-48e8-4917-b487-a6b096fbc87d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:00,205 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ab9ab1-48e8-4917-b487-a6b096fbc87d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:41:00,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ab9ab1-48e8-4917-b487-a6b096fbc87d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 07:41:00,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:00,282 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 07:41:00,285 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:41:00,442 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 132 proven. 0 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2023-11-19 07:41:00,442 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:41:00,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:00,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486158573] [2023-11-19 07:41:00,443 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:41:00,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890713982] [2023-11-19 07:41:00,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890713982] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:41:00,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:41:00,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 07:41:00,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200854972] [2023-11-19 07:41:00,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:41:00,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 07:41:00,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:00,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:41:00,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:41:00,446 INFO L87 Difference]: Start difference. First operand 93 states and 110 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2023-11-19 07:41:00,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:41:00,602 INFO L93 Difference]: Finished difference Result 125 states and 151 transitions. [2023-11-19 07:41:00,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:41:00,603 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 86 [2023-11-19 07:41:00,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:41:00,605 INFO L225 Difference]: With dead ends: 125 [2023-11-19 07:41:00,605 INFO L226 Difference]: Without dead ends: 88 [2023-11-19 07:41:00,605 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:41:00,606 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 8 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:41:00,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 96 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:41:00,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-11-19 07:41:00,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 79. [2023-11-19 07:41:00,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 50 states have (on average 1.08) internal successors, (54), 52 states have internal predecessors, (54), 18 states have call successors, (18), 10 states have call predecessors, (18), 10 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2023-11-19 07:41:00,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 89 transitions. [2023-11-19 07:41:00,639 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 89 transitions. Word has length 86 [2023-11-19 07:41:00,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:41:00,640 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 89 transitions. [2023-11-19 07:41:00,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2023-11-19 07:41:00,640 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 89 transitions. [2023-11-19 07:41:00,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-11-19 07:41:00,641 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:41:00,641 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:41:00,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ab9ab1-48e8-4917-b487-a6b096fbc87d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 07:41:00,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ab9ab1-48e8-4917-b487-a6b096fbc87d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-19 07:41:00,856 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:41:00,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:00,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1193302554, now seen corresponding path program 2 times [2023-11-19 07:41:00,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:00,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518654152] [2023-11-19 07:41:00,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:00,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:00,866 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:41:00,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1997846264] [2023-11-19 07:41:00,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:41:00,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:41:00,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ab9ab1-48e8-4917-b487-a6b096fbc87d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:00,870 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ab9ab1-48e8-4917-b487-a6b096fbc87d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:41:00,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ab9ab1-48e8-4917-b487-a6b096fbc87d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 07:41:00,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:41:00,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:41:00,944 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-19 07:41:00,946 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:41:01,035 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 195 proven. 0 refuted. 0 times theorem prover too weak. 167 trivial. 0 not checked. [2023-11-19 07:41:01,035 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:41:01,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:01,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518654152] [2023-11-19 07:41:01,036 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:41:01,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997846264] [2023-11-19 07:41:01,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997846264] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:41:01,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:41:01,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 07:41:01,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712308031] [2023-11-19 07:41:01,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:41:01,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 07:41:01,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:01,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:41:01,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:41:01,038 INFO L87 Difference]: Start difference. First operand 79 states and 89 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-19 07:41:01,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:41:01,090 INFO L93 Difference]: Finished difference Result 79 states and 89 transitions. [2023-11-19 07:41:01,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:41:01,091 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 86 [2023-11-19 07:41:01,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:41:01,091 INFO L225 Difference]: With dead ends: 79 [2023-11-19 07:41:01,092 INFO L226 Difference]: Without dead ends: 0 [2023-11-19 07:41:01,092 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-19 07:41:01,093 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 4 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:41:01,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 62 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:41:01,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-11-19 07:41:01,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-11-19 07:41:01,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states 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 07:41:01,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-11-19 07:41:01,095 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 86 [2023-11-19 07:41:01,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:41:01,095 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-19 07:41:01,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-19 07:41:01,095 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-11-19 07:41:01,095 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-11-19 07:41:01,098 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-11-19 07:41:01,124 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ab9ab1-48e8-4917-b487-a6b096fbc87d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-19 07:41:01,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ab9ab1-48e8-4917-b487-a6b096fbc87d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:41:01,314 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-11-19 07:41:04,943 INFO L899 garLoopResultBuilder]: For program point L52(lines 52 55) no Hoare annotation was computed. [2023-11-19 07:41:04,944 INFO L895 garLoopResultBuilder]: At program point L52-2(lines 44 56) the Hoare annotation is: (let ((.cse2 (= |ULTIMATE.start_main_~q~0#1| 0)) (.cse0 (= |ULTIMATE.start_main_~d~0#1| 1)) (.cse1 (= |ULTIMATE.start_main_~p~0#1| 1)) (.cse4 (= |ULTIMATE.start_main_~A~0#1| 1)) (.cse3 (= |ULTIMATE.start_main_~B~0#1| 1))) (or (and .cse0 .cse1 .cse2 (= |ULTIMATE.start_main_~A~0#1| |ULTIMATE.start_main_~r~0#1|) .cse3) (and (= 2 |ULTIMATE.start_main_~p~0#1|) .cse2 .cse4 (= |ULTIMATE.start_main_~r~0#1| 1) .cse3 (= 2 |ULTIMATE.start_main_~d~0#1|)) (and .cse0 .cse1 (= |ULTIMATE.start_main_~r~0#1| 0) (= |ULTIMATE.start_main_~q~0#1| 1) .cse4 .cse3))) [2023-11-19 07:41:04,944 INFO L899 garLoopResultBuilder]: For program point L11(lines 11 13) no Hoare annotation was computed. [2023-11-19 07:41:04,944 INFO L895 garLoopResultBuilder]: At program point L44-1(lines 44 56) the Hoare annotation is: (and (= (+ |ULTIMATE.start_main_~A~0#1| |ULTIMATE.start_main_~d~0#1|) (+ (* |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~q~0#1|) (* |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~p~0#1|) |ULTIMATE.start_main_~r~0#1|)) (= |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~d~0#1|) (= (+ (* |ULTIMATE.start_main_~d~0#1| |ULTIMATE.start_main_~q~0#1|) |ULTIMATE.start_main_~r~0#1|) |ULTIMATE.start_main_~A~0#1|)) [2023-11-19 07:41:04,944 INFO L899 garLoopResultBuilder]: For program point main_returnLabel#1(lines 22 61) no Hoare annotation was computed. [2023-11-19 07:41:04,945 INFO L895 garLoopResultBuilder]: At program point L36(line 36) the Hoare annotation is: (let ((.cse0 (= |ULTIMATE.start_main_~q~0#1| 0)) (.cse1 (= |ULTIMATE.start_main_~A~0#1| |ULTIMATE.start_main_~r~0#1|)) (.cse2 (= |ULTIMATE.start_main_~B~0#1| 1))) (or (and (= |ULTIMATE.start_main_~d~0#1| 1) (= |ULTIMATE.start_main_~p~0#1| 1) (<= |ULTIMATE.start_main_~A~0#1| 1) .cse0 .cse1 .cse2 (<= 0 |ULTIMATE.start_main_~A~0#1|)) (and (= 2 |ULTIMATE.start_main_~p~0#1|) .cse0 .cse1 (= |ULTIMATE.start_main_~r~0#1| 1) .cse2 (= 2 |ULTIMATE.start_main_~d~0#1|)))) [2023-11-19 07:41:04,945 INFO L899 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2023-11-19 07:41:04,945 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2023-11-19 07:41:04,945 INFO L895 garLoopResultBuilder]: At program point L45(line 45) the Hoare annotation is: (let ((.cse2 (= |ULTIMATE.start_main_~q~0#1| 0)) (.cse0 (= |ULTIMATE.start_main_~d~0#1| 1)) (.cse1 (= |ULTIMATE.start_main_~p~0#1| 1)) (.cse4 (= |ULTIMATE.start_main_~A~0#1| 1)) (.cse3 (= |ULTIMATE.start_main_~B~0#1| 1))) (or (and .cse0 .cse1 .cse2 (= |ULTIMATE.start_main_~A~0#1| |ULTIMATE.start_main_~r~0#1|) .cse3) (and (= 2 |ULTIMATE.start_main_~p~0#1|) .cse2 .cse4 (= |ULTIMATE.start_main_~r~0#1| 1) .cse3 (= 2 |ULTIMATE.start_main_~d~0#1|)) (and .cse0 .cse1 (= |ULTIMATE.start_main_~r~0#1| 0) (= |ULTIMATE.start_main_~q~0#1| 1) .cse4 .cse3))) [2023-11-19 07:41:04,945 INFO L899 garLoopResultBuilder]: For program point L12(line 12) no Hoare annotation was computed. [2023-11-19 07:41:04,945 INFO L895 garLoopResultBuilder]: At program point L45-1(line 45) the Hoare annotation is: (let ((.cse2 (= |ULTIMATE.start_main_~q~0#1| 0)) (.cse0 (= |ULTIMATE.start_main_~d~0#1| 1)) (.cse1 (= |ULTIMATE.start_main_~p~0#1| 1)) (.cse4 (= |ULTIMATE.start_main_~A~0#1| 1)) (.cse3 (= |ULTIMATE.start_main_~B~0#1| 1))) (or (and .cse0 .cse1 .cse2 (= |ULTIMATE.start_main_~A~0#1| |ULTIMATE.start_main_~r~0#1|) .cse3) (and (= 2 |ULTIMATE.start_main_~p~0#1|) .cse2 .cse4 (= |ULTIMATE.start_main_~r~0#1| 1) .cse3 (= 2 |ULTIMATE.start_main_~d~0#1|)) (and .cse0 .cse1 (= |ULTIMATE.start_main_~r~0#1| 0) (= |ULTIMATE.start_main_~q~0#1| 1) .cse4 .cse3))) [2023-11-19 07:41:04,945 INFO L899 garLoopResultBuilder]: For program point L37(lines 34 42) no Hoare annotation was computed. [2023-11-19 07:41:04,946 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-11-19 07:41:04,946 INFO L895 garLoopResultBuilder]: At program point L58(line 58) the Hoare annotation is: (or (and (= (+ |ULTIMATE.start_main_~A~0#1| |ULTIMATE.start_main_~d~0#1|) (+ (* |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~q~0#1|) (* |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~p~0#1|) |ULTIMATE.start_main_~r~0#1|)) (= |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~d~0#1|) (= (+ (* |ULTIMATE.start_main_~d~0#1| |ULTIMATE.start_main_~q~0#1|) |ULTIMATE.start_main_~r~0#1|) |ULTIMATE.start_main_~A~0#1|)) (and (= |ULTIMATE.start_main_~d~0#1| 1) (= |ULTIMATE.start_main_~p~0#1| 1) (= |ULTIMATE.start_main_~B~0#1| 1))) [2023-11-19 07:41:04,946 INFO L899 garLoopResultBuilder]: For program point L46(lines 44 56) no Hoare annotation was computed. [2023-11-19 07:41:04,946 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line -1) no Hoare annotation was computed. [2023-11-19 07:41:04,946 INFO L895 garLoopResultBuilder]: At program point L34-2(lines 34 42) the Hoare annotation is: (let ((.cse0 (= |ULTIMATE.start_main_~q~0#1| 0)) (.cse1 (= |ULTIMATE.start_main_~A~0#1| |ULTIMATE.start_main_~r~0#1|)) (.cse2 (= |ULTIMATE.start_main_~B~0#1| 1))) (or (and (= |ULTIMATE.start_main_~d~0#1| 1) (= |ULTIMATE.start_main_~p~0#1| 1) (<= |ULTIMATE.start_main_~A~0#1| 1) .cse0 .cse1 .cse2 (<= 0 |ULTIMATE.start_main_~A~0#1|)) (and (= 2 |ULTIMATE.start_main_~p~0#1|) .cse0 .cse1 (= |ULTIMATE.start_main_~r~0#1| 1) .cse2 (= 2 |ULTIMATE.start_main_~d~0#1|)))) [2023-11-19 07:41:04,946 INFO L899 garLoopResultBuilder]: For program point L59(line 59) no Hoare annotation was computed. [2023-11-19 07:41:04,947 INFO L895 garLoopResultBuilder]: At program point L35(line 35) the Hoare annotation is: (let ((.cse0 (= |ULTIMATE.start_main_~q~0#1| 0)) (.cse1 (= |ULTIMATE.start_main_~A~0#1| |ULTIMATE.start_main_~r~0#1|)) (.cse2 (= |ULTIMATE.start_main_~B~0#1| 1))) (or (and (= |ULTIMATE.start_main_~d~0#1| 1) (= |ULTIMATE.start_main_~p~0#1| 1) (<= |ULTIMATE.start_main_~A~0#1| 1) .cse0 .cse1 .cse2 (<= 0 |ULTIMATE.start_main_~A~0#1|)) (and (= 2 |ULTIMATE.start_main_~p~0#1|) .cse0 .cse1 (= |ULTIMATE.start_main_~r~0#1| 1) .cse2 (= 2 |ULTIMATE.start_main_~d~0#1|)))) [2023-11-19 07:41:04,947 INFO L895 garLoopResultBuilder]: At program point L35-1(line 35) the Hoare annotation is: (let ((.cse0 (= |ULTIMATE.start_main_~q~0#1| 0)) (.cse1 (= |ULTIMATE.start_main_~A~0#1| |ULTIMATE.start_main_~r~0#1|)) (.cse2 (= |ULTIMATE.start_main_~B~0#1| 1))) (or (and (= |ULTIMATE.start_main_~d~0#1| 1) (= |ULTIMATE.start_main_~p~0#1| 1) (<= |ULTIMATE.start_main_~A~0#1| 1) .cse0 .cse1 .cse2 (<= 0 |ULTIMATE.start_main_~A~0#1|)) (and (= 2 |ULTIMATE.start_main_~p~0#1|) .cse0 .cse1 (= |ULTIMATE.start_main_~r~0#1| 1) .cse2 (= 2 |ULTIMATE.start_main_~d~0#1|)))) [2023-11-19 07:41:04,947 INFO L899 garLoopResultBuilder]: For program point L16(lines 16 17) no Hoare annotation was computed. [2023-11-19 07:41:04,947 INFO L899 garLoopResultBuilder]: For program point L15(lines 15 18) no Hoare annotation was computed. [2023-11-19 07:41:04,947 INFO L899 garLoopResultBuilder]: For program point L15-2(lines 14 20) no Hoare annotation was computed. [2023-11-19 07:41:04,947 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 14 20) no Hoare annotation was computed. [2023-11-19 07:41:04,947 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 14 20) the Hoare annotation is: true [2023-11-19 07:41:04,948 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2023-11-19 07:41:04,952 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:41:04,955 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-19 07:41:04,973 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 07:41:04 BoogieIcfgContainer [2023-11-19 07:41:04,973 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-19 07:41:04,974 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-19 07:41:04,974 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-19 07:41:04,974 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-19 07:41:04,975 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:40:47" (3/4) ... [2023-11-19 07:41:04,977 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-11-19 07:41:04,982 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2023-11-19 07:41:04,988 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 16 nodes and edges [2023-11-19 07:41:04,989 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2023-11-19 07:41:04,989 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2023-11-19 07:41:04,989 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-11-19 07:41:04,990 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-11-19 07:41:05,105 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ab9ab1-48e8-4917-b487-a6b096fbc87d/bin/uautomizer-verify-uCwYo4JHxu/witness.graphml [2023-11-19 07:41:05,105 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ab9ab1-48e8-4917-b487-a6b096fbc87d/bin/uautomizer-verify-uCwYo4JHxu/witness.yml [2023-11-19 07:41:05,106 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-19 07:41:05,106 INFO L158 Benchmark]: Toolchain (without parser) took 18768.19ms. Allocated memory was 144.7MB in the beginning and 251.7MB in the end (delta: 107.0MB). Free memory was 113.9MB in the beginning and 209.6MB in the end (delta: -95.8MB). Peak memory consumption was 13.5MB. Max. memory is 16.1GB. [2023-11-19 07:41:05,107 INFO L158 Benchmark]: CDTParser took 0.34ms. Allocated memory is still 144.7MB. Free memory is still 99.6MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-19 07:41:05,107 INFO L158 Benchmark]: CACSL2BoogieTranslator took 279.44ms. Allocated memory is still 144.7MB. Free memory was 113.9MB in the beginning and 102.8MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-19 07:41:05,108 INFO L158 Benchmark]: Boogie Procedure Inliner took 43.07ms. Allocated memory is still 144.7MB. Free memory was 102.8MB in the beginning and 101.4MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-19 07:41:05,108 INFO L158 Benchmark]: Boogie Preprocessor took 43.07ms. Allocated memory is still 144.7MB. Free memory was 101.4MB in the beginning and 100.1MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-19 07:41:05,109 INFO L158 Benchmark]: RCFGBuilder took 321.39ms. Allocated memory is still 144.7MB. Free memory was 100.1MB in the beginning and 89.2MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-19 07:41:05,110 INFO L158 Benchmark]: TraceAbstraction took 17941.18ms. Allocated memory was 144.7MB in the beginning and 251.7MB in the end (delta: 107.0MB). Free memory was 88.4MB in the beginning and 214.8MB in the end (delta: -126.4MB). Peak memory consumption was 97.4MB. Max. memory is 16.1GB. [2023-11-19 07:41:05,111 INFO L158 Benchmark]: Witness Printer took 132.26ms. Allocated memory is still 251.7MB. Free memory was 214.8MB in the beginning and 209.6MB in the end (delta: 5.2MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2023-11-19 07:41:05,114 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34ms. Allocated memory is still 144.7MB. Free memory is still 99.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 279.44ms. Allocated memory is still 144.7MB. Free memory was 113.9MB in the beginning and 102.8MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 43.07ms. Allocated memory is still 144.7MB. Free memory was 102.8MB in the beginning and 101.4MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 43.07ms. Allocated memory is still 144.7MB. Free memory was 101.4MB in the beginning and 100.1MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 321.39ms. Allocated memory is still 144.7MB. Free memory was 100.1MB in the beginning and 89.2MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 17941.18ms. Allocated memory was 144.7MB in the beginning and 251.7MB in the end (delta: 107.0MB). Free memory was 88.4MB in the beginning and 214.8MB in the end (delta: -126.4MB). Peak memory consumption was 97.4MB. Max. memory is 16.1GB. * Witness Printer took 132.26ms. Allocated memory is still 251.7MB. Free memory was 214.8MB in the beginning and 209.6MB in the end (delta: 5.2MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 17]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 17.9s, OverallIterations: 11, TraceHistogramMax: 14, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 5.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 3.6s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 195 SdHoareTripleChecker+Valid, 3.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 159 mSDsluCounter, 1130 SdHoareTripleChecker+Invalid, 3.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 834 mSDsCounter, 150 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 914 IncrementalHoareTripleChecker+Invalid, 1065 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 150 mSolverCounterUnsat, 296 mSDtfsCounter, 914 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 729 GetRequests, 632 SyntacticMatches, 5 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 2.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=102occurred in iteration=7, InterpolantAutomatonStates: 82, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 11 MinimizatonAttempts, 57 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 10 LocationsWithAnnotation, 82 PreInvPairs, 107 NumberOfFragments, 391 HoareAnnotationTreeSize, 82 FomulaSimplifications, 1949 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 10 FomulaSimplificationsInter, 1165 FormulaSimplificationTreeSizeReductionInter, 3.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 5.6s InterpolantComputationTime, 480 NumberOfCodeBlocks, 480 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 721 ConstructedInterpolants, 0 QuantifiedInterpolants, 4613 SizeOfPredicates, 20 NumberOfNonLiveVariables, 1234 ConjunctsInSsa, 144 ConjunctsInUnsatCore, 16 InterpolantComputations, 7 PerfectInterpolantSequences, 1918/2068 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 44]: Loop Invariant Derived loop invariant: (((((((d == 1) && (p == 1)) && (q == 0)) && (A == r)) && (B == 1)) || ((((((2 == p) && (q == 0)) && (A == 1)) && (r == 1)) && (B == 1)) && (2 == d))) || ((((((d == 1) && (p == 1)) && (r == 0)) && (q == 1)) && (A == 1)) && (B == 1))) - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: ((((((((d == 1) && (p == 1)) && (A <= 1)) && (q == 0)) && (A == r)) && (B == 1)) && (0 <= A)) || ((((((2 == p) && (q == 0)) && (A == r)) && (r == 1)) && (B == 1)) && (2 == d))) RESULT: Ultimate proved your program to be correct! [2023-11-19 07:41:05,159 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93ab9ab1-48e8-4917-b487-a6b096fbc87d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE