./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench/divbin.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b 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_33b74c54-b95e-4303-9200-8a9f7675259c/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33b74c54-b95e-4303-9200-8a9f7675259c/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33b74c54-b95e-4303-9200-8a9f7675259c/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33b74c54-b95e-4303-9200-8a9f7675259c/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench/divbin.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33b74c54-b95e-4303-9200-8a9f7675259c/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33b74c54-b95e-4303-9200-8a9f7675259c/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --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 c49641164907d0e2939c5443b0376a8e4377b34a58fd804ad01c6cf7d42c55dc --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:56:40,253 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:56:40,334 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33b74c54-b95e-4303-9200-8a9f7675259c/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:56:40,339 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:56:40,340 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:56:40,367 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:56:40,367 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:56:40,368 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:56:40,369 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:56:40,370 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:56:40,370 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:56:40,371 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:56:40,372 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:56:40,372 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:56:40,373 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:56:40,374 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:56:40,374 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:56:40,375 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:56:40,375 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:56:40,376 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:56:40,376 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:56:40,377 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:56:40,378 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:56:40,378 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:56:40,379 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:56:40,379 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:56:40,379 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:56:40,380 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:56:40,380 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:56:40,381 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:56:40,381 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:56:40,382 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:56:40,382 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:56:40,383 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:56:40,383 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:56:40,383 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:56:40,384 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:56:40,384 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:56:40,385 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:56:40,385 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_33b74c54-b95e-4303-9200-8a9f7675259c/bin/uautomizer-verify-WvqO1wxjHP/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33b74c54-b95e-4303-9200-8a9f7675259c/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c49641164907d0e2939c5443b0376a8e4377b34a58fd804ad01c6cf7d42c55dc [2023-11-06 22:56:40,624 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:56:40,645 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:56:40,648 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:56:40,649 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:56:40,650 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:56:40,651 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33b74c54-b95e-4303-9200-8a9f7675259c/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/nla-digbench/divbin.i [2023-11-06 22:56:43,815 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:56:44,032 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:56:44,032 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33b74c54-b95e-4303-9200-8a9f7675259c/sv-benchmarks/c/nla-digbench/divbin.i [2023-11-06 22:56:44,039 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33b74c54-b95e-4303-9200-8a9f7675259c/bin/uautomizer-verify-WvqO1wxjHP/data/0c719a55a/c26b3a909d2d4f32ae5edb8e89a95779/FLAG5ae8020e9 [2023-11-06 22:56:44,059 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33b74c54-b95e-4303-9200-8a9f7675259c/bin/uautomizer-verify-WvqO1wxjHP/data/0c719a55a/c26b3a909d2d4f32ae5edb8e89a95779 [2023-11-06 22:56:44,070 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:56:44,072 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:56:44,076 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:56:44,077 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:56:44,083 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:56:44,083 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:56:44" (1/1) ... [2023-11-06 22:56:44,085 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@590c9966 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:44, skipping insertion in model container [2023-11-06 22:56:44,085 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:56:44" (1/1) ... [2023-11-06 22:56:44,115 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:56:44,314 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_33b74c54-b95e-4303-9200-8a9f7675259c/sv-benchmarks/c/nla-digbench/divbin.i[950,963] [2023-11-06 22:56:44,337 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:56:44,350 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:56:44,369 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_33b74c54-b95e-4303-9200-8a9f7675259c/sv-benchmarks/c/nla-digbench/divbin.i[950,963] [2023-11-06 22:56:44,384 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:56:44,404 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:56:44,404 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:44 WrapperNode [2023-11-06 22:56:44,404 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:56:44,406 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:56:44,406 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:56:44,406 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:56:44,414 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:44" (1/1) ... [2023-11-06 22:56:44,424 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:44" (1/1) ... [2023-11-06 22:56:44,443 INFO L138 Inliner]: procedures = 16, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 46 [2023-11-06 22:56:44,444 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:56:44,445 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:56:44,446 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:56:44,446 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:56:44,455 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:44" (1/1) ... [2023-11-06 22:56:44,456 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:44" (1/1) ... [2023-11-06 22:56:44,467 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:44" (1/1) ... [2023-11-06 22:56:44,468 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:44" (1/1) ... [2023-11-06 22:56:44,472 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:44" (1/1) ... [2023-11-06 22:56:44,480 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:44" (1/1) ... [2023-11-06 22:56:44,484 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:44" (1/1) ... [2023-11-06 22:56:44,486 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:44" (1/1) ... [2023-11-06 22:56:44,492 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:56:44,493 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:56:44,494 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:56:44,494 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:56:44,495 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:44" (1/1) ... [2023-11-06 22:56:44,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:56:44,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33b74c54-b95e-4303-9200-8a9f7675259c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:56:44,530 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33b74c54-b95e-4303-9200-8a9f7675259c/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:56:44,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33b74c54-b95e-4303-9200-8a9f7675259c/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:56:44,579 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:56:44,580 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-06 22:56:44,580 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-06 22:56:44,581 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:56:44,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:56:44,581 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:56:44,581 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-06 22:56:44,582 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-06 22:56:44,655 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:56:44,657 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:56:44,847 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:56:44,853 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:56:44,853 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-06 22:56:44,855 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:56:44 BoogieIcfgContainer [2023-11-06 22:56:44,855 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:56:44,858 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:56:44,858 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:56:44,862 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:56:44,862 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:56:44" (1/3) ... [2023-11-06 22:56:44,863 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34bc3445 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:56:44, skipping insertion in model container [2023-11-06 22:56:44,863 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:44" (2/3) ... [2023-11-06 22:56:44,864 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34bc3445 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:56:44, skipping insertion in model container [2023-11-06 22:56:44,864 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:56:44" (3/3) ... [2023-11-06 22:56:44,865 INFO L112 eAbstractionObserver]: Analyzing ICFG divbin.i [2023-11-06 22:56:44,886 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:56:44,886 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 22:56:44,933 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:56:44,940 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=LoopsAndPotentialCycles, 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;@4921df6d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:56:44,941 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 22:56:44,945 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-06 22:56:44,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-06 22:56:44,954 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:56:44,954 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:56:44,955 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:56:44,961 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:56:44,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1977894454, now seen corresponding path program 1 times [2023-11-06 22:56:44,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:56:44,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091759571] [2023-11-06 22:56:44,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:56:44,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:56:45,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:56:45,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:56:45,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091759571] [2023-11-06 22:56:45,171 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-06 22:56:45,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574257381] [2023-11-06 22:56:45,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:56:45,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:56:45,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33b74c54-b95e-4303-9200-8a9f7675259c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:56:45,178 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33b74c54-b95e-4303-9200-8a9f7675259c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:56:45,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33b74c54-b95e-4303-9200-8a9f7675259c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:56:45,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:56:45,281 INFO L262 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-06 22:56:45,286 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:56:45,316 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:56:45,316 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:56:45,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574257381] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:56:45,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:56:45,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:56:45,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768927968] [2023-11-06 22:56:45,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:56:45,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 22:56:45,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:56:45,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 22:56:45,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 22:56:45,372 INFO L87 Difference]: Start difference. First operand has 26 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 22:56:45,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:56:45,399 INFO L93 Difference]: Finished difference Result 49 states and 72 transitions. [2023-11-06 22:56:45,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 22:56:45,402 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2023-11-06 22:56:45,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:56:45,410 INFO L225 Difference]: With dead ends: 49 [2023-11-06 22:56:45,410 INFO L226 Difference]: Without dead ends: 22 [2023-11-06 22:56:45,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 22:56:45,419 INFO L413 NwaCegarLoop]: 30 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, 30 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 [2023-11-06 22:56:45,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:56:45,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-11-06 22:56:45,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-11-06 22:56:45,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 22:56:45,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2023-11-06 22:56:45,462 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 19 [2023-11-06 22:56:45,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:56:45,463 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2023-11-06 22:56:45,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 22:56:45,463 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2023-11-06 22:56:45,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-06 22:56:45,466 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:56:45,466 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:56:45,477 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33b74c54-b95e-4303-9200-8a9f7675259c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-06 22:56:45,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33b74c54-b95e-4303-9200-8a9f7675259c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-06 22:56:45,673 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:56:45,674 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:56:45,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1409334960, now seen corresponding path program 1 times [2023-11-06 22:56:45,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:56:45,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191439556] [2023-11-06 22:56:45,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:56:45,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:56:45,716 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:56:45,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [978499316] [2023-11-06 22:56:45,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:56:45,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:56:45,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33b74c54-b95e-4303-9200-8a9f7675259c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:56:45,719 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33b74c54-b95e-4303-9200-8a9f7675259c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:56:45,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33b74c54-b95e-4303-9200-8a9f7675259c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:56:45,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:56:45,796 INFO L262 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-06 22:56:45,800 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:56:46,125 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:56:46,126 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:56:46,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:56:46,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191439556] [2023-11-06 22:56:46,127 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:56:46,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978499316] [2023-11-06 22:56:46,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978499316] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:56:46,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:56:46,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-06 22:56:46,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468253294] [2023-11-06 22:56:46,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:56:46,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:56:46,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:56:46,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:56:46,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-11-06 22:56:46,131 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 7 states have internal predecessors, (12), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 22:56:46,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:56:46,346 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2023-11-06 22:56:46,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 22:56:46,347 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 7 states have internal predecessors, (12), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2023-11-06 22:56:46,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:56:46,348 INFO L225 Difference]: With dead ends: 34 [2023-11-06 22:56:46,349 INFO L226 Difference]: Without dead ends: 31 [2023-11-06 22:56:46,350 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:56:46,352 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 38 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:56:46,354 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 101 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:56:46,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-11-06 22:56:46,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-11-06 22:56:46,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 23 states have internal predecessors, (27), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-06 22:56:46,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2023-11-06 22:56:46,375 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 20 [2023-11-06 22:56:46,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:56:46,378 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2023-11-06 22:56:46,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 7 states have internal predecessors, (12), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 22:56:46,379 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2023-11-06 22:56:46,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-06 22:56:46,380 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:56:46,380 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:56:46,391 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33b74c54-b95e-4303-9200-8a9f7675259c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:56:46,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33b74c54-b95e-4303-9200-8a9f7675259c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-06 22:56:46,587 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:56:46,587 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:56:46,587 INFO L85 PathProgramCache]: Analyzing trace with hash -944023701, now seen corresponding path program 1 times [2023-11-06 22:56:46,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:56:46,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707769244] [2023-11-06 22:56:46,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:56:46,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:56:46,603 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:56:46,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [471864235] [2023-11-06 22:56:46,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:56:46,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:56:46,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33b74c54-b95e-4303-9200-8a9f7675259c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:56:46,605 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33b74c54-b95e-4303-9200-8a9f7675259c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:56:46,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33b74c54-b95e-4303-9200-8a9f7675259c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:56:46,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:56:46,667 INFO L262 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-06 22:56:46,670 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:56:46,887 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:56:46,887 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:56:47,133 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:56:47,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:56:47,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707769244] [2023-11-06 22:56:47,135 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:56:47,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471864235] [2023-11-06 22:56:47,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471864235] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:56:47,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:56:47,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 13 [2023-11-06 22:56:47,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617835286] [2023-11-06 22:56:47,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:56:47,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:56:47,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:56:47,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:56:47,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2023-11-06 22:56:47,140 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 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) [2023-11-06 22:56:49,220 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 [1] [2023-11-06 22:56:51,243 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-06 22:56:53,281 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-06 22:56:53,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:56:53,334 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2023-11-06 22:56:53,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 22:56:53,334 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 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 22 [2023-11-06 22:56:53,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:56:53,336 INFO L225 Difference]: With dead ends: 45 [2023-11-06 22:56:53,336 INFO L226 Difference]: Without dead ends: 43 [2023-11-06 22:56:53,337 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:56:53,338 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 9 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:56:53,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 89 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 3 Unknown, 0 Unchecked, 6.2s Time] [2023-11-06 22:56:53,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-11-06 22:56:53,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 37. [2023-11-06 22:56:53,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 28 states have internal predecessors, (31), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-06 22:56:53,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2023-11-06 22:56:53,363 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 22 [2023-11-06 22:56:53,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:56:53,364 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2023-11-06 22:56:53,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 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) [2023-11-06 22:56:53,367 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2023-11-06 22:56:53,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-06 22:56:53,370 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:56:53,370 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:56:53,381 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33b74c54-b95e-4303-9200-8a9f7675259c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:56:53,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33b74c54-b95e-4303-9200-8a9f7675259c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:56:53,576 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:56:53,577 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:56:53,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1056631181, now seen corresponding path program 1 times [2023-11-06 22:56:53,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:56:53,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769534614] [2023-11-06 22:56:53,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:56:53,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:56:53,600 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:56:53,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [14425663] [2023-11-06 22:56:53,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:56:53,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:56:53,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33b74c54-b95e-4303-9200-8a9f7675259c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:56:53,602 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33b74c54-b95e-4303-9200-8a9f7675259c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:56:53,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33b74c54-b95e-4303-9200-8a9f7675259c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:56:53,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:56:53,658 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:56:53,661 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:56:53,686 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:56:53,687 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:56:53,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:56:53,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769534614] [2023-11-06 22:56:53,690 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:56:53,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14425663] [2023-11-06 22:56:53,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14425663] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:56:53,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:56:53,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:56:53,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174546240] [2023-11-06 22:56:53,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:56:53,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:56:53,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:56:53,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:56:53,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:56:53,694 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-06 22:56:53,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:56:53,722 INFO L93 Difference]: Finished difference Result 48 states and 55 transitions. [2023-11-06 22:56:53,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:56:53,723 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2023-11-06 22:56:53,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:56:53,725 INFO L225 Difference]: With dead ends: 48 [2023-11-06 22:56:53,726 INFO L226 Difference]: Without dead ends: 30 [2023-11-06 22:56:53,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:56:53,731 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:56:53,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 42 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:56:53,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-11-06 22:56:53,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2023-11-06 22:56:53,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 23 states have internal predecessors, (25), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-06 22:56:53,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2023-11-06 22:56:53,748 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 28 [2023-11-06 22:56:53,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:56:53,748 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2023-11-06 22:56:53,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-06 22:56:53,749 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2023-11-06 22:56:53,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-06 22:56:53,750 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:56:53,750 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:56:53,760 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33b74c54-b95e-4303-9200-8a9f7675259c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:56:53,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33b74c54-b95e-4303-9200-8a9f7675259c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:56:53,955 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:56:53,955 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:56:53,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1145312525, now seen corresponding path program 1 times [2023-11-06 22:56:53,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:56:53,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99071135] [2023-11-06 22:56:53,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:56:53,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:56:53,970 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:56:53,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1851380184] [2023-11-06 22:56:53,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:56:53,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:56:53,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33b74c54-b95e-4303-9200-8a9f7675259c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:56:53,976 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33b74c54-b95e-4303-9200-8a9f7675259c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:56:53,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33b74c54-b95e-4303-9200-8a9f7675259c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:56:54,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:56:54,035 INFO L262 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 22:56:54,037 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:56:54,102 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:56:54,103 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:56:54,216 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:56:54,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:56:54,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99071135] [2023-11-06 22:56:54,217 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:56:54,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851380184] [2023-11-06 22:56:54,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851380184] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:56:54,219 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:56:54,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2023-11-06 22:56:54,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878261544] [2023-11-06 22:56:54,226 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:56:54,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-06 22:56:54,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:56:54,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-06 22:56:54,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-11-06 22:56:54,228 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-06 22:56:55,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:56:55,097 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2023-11-06 22:56:55,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 22:56:55,098 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2023-11-06 22:56:55,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:56:55,099 INFO L225 Difference]: With dead ends: 36 [2023-11-06 22:56:55,099 INFO L226 Difference]: Without dead ends: 29 [2023-11-06 22:56:55,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-11-06 22:56:55,100 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 12 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-06 22:56:55,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 103 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-06 22:56:55,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-11-06 22:56:55,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-11-06 22:56:55,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 states have internal predecessors, (24), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-06 22:56:55,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2023-11-06 22:56:55,112 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 28 [2023-11-06 22:56:55,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:56:55,113 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2023-11-06 22:56:55,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-06 22:56:55,113 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2023-11-06 22:56:55,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-06 22:56:55,114 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:56:55,114 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:56:55,127 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33b74c54-b95e-4303-9200-8a9f7675259c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:56:55,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33b74c54-b95e-4303-9200-8a9f7675259c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:56:55,320 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:56:55,321 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:56:55,321 INFO L85 PathProgramCache]: Analyzing trace with hash -444407410, now seen corresponding path program 1 times [2023-11-06 22:56:55,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:56:55,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59946206] [2023-11-06 22:56:55,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:56:55,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:56:55,353 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:56:55,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [121783604] [2023-11-06 22:56:55,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:56:55,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:56:55,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33b74c54-b95e-4303-9200-8a9f7675259c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:56:55,373 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33b74c54-b95e-4303-9200-8a9f7675259c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:56:55,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33b74c54-b95e-4303-9200-8a9f7675259c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:56:55,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:56:55,750 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-06 22:56:55,752 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:57:01,358 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:57:01,358 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:57:04,308 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:57:04,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:57:04,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59946206] [2023-11-06 22:57:04,308 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:57:04,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121783604] [2023-11-06 22:57:04,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121783604] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:57:04,309 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:57:04,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2023-11-06 22:57:04,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024523411] [2023-11-06 22:57:04,310 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:57:04,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-06 22:57:04,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:57:04,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-06 22:57:04,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=276, Unknown=1, NotChecked=0, Total=342 [2023-11-06 22:57:04,312 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 16 states have internal predecessors, (34), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-06 22:57:19,372 WARN L293 SmtUtils]: Spent 12.65s on a formula simplification that was a NOOP. DAG size: 37 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-06 22:57:21,816 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-06 22:57:24,322 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-06 22:57:31,959 WARN L293 SmtUtils]: Spent 6.63s on a formula simplification that was a NOOP. DAG size: 38 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-06 22:57:38,254 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-06 22:57:44,065 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-11-06 22:57:46,190 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-11-06 22:57:49,634 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-06 22:57:51,891 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-06 22:57:53,896 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-06 22:57:56,284 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-06 22:57:58,398 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-06 22:57:58,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:57:58,399 INFO L93 Difference]: Finished difference Result 73 states and 87 transitions. [2023-11-06 22:57:58,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-06 22:57:58,402 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 16 states have internal predecessors, (34), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 30 [2023-11-06 22:57:58,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:57:58,403 INFO L225 Difference]: With dead ends: 73 [2023-11-06 22:57:58,403 INFO L226 Difference]: Without dead ends: 63 [2023-11-06 22:57:58,405 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 33.6s TimeCoverageRelationStatistics Valid=194, Invalid=797, Unknown=1, NotChecked=0, Total=992 [2023-11-06 22:57:58,406 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 50 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 27 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.7s IncrementalHoareTripleChecker+Time [2023-11-06 22:57:58,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 176 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 197 Invalid, 8 Unknown, 0 Unchecked, 25.7s Time] [2023-11-06 22:57:58,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-11-06 22:57:58,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 55. [2023-11-06 22:57:58,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 41 states have (on average 1.170731707317073) internal successors, (48), 44 states have internal predecessors, (48), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-06 22:57:58,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2023-11-06 22:57:58,434 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 30 [2023-11-06 22:57:58,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:57:58,435 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2023-11-06 22:57:58,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 16 states have internal predecessors, (34), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-06 22:57:58,435 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2023-11-06 22:57:58,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-06 22:57:58,437 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:57:58,437 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:57:58,443 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33b74c54-b95e-4303-9200-8a9f7675259c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-06 22:57:58,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33b74c54-b95e-4303-9200-8a9f7675259c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:57:58,643 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:57:58,644 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:57:58,644 INFO L85 PathProgramCache]: Analyzing trace with hash -450624729, now seen corresponding path program 1 times [2023-11-06 22:57:58,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:57:58,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576744409] [2023-11-06 22:57:58,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:57:58,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:57:58,665 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:57:58,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [362445483] [2023-11-06 22:57:58,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:57:58,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:57:58,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33b74c54-b95e-4303-9200-8a9f7675259c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:57:58,669 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33b74c54-b95e-4303-9200-8a9f7675259c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:57:58,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33b74c54-b95e-4303-9200-8a9f7675259c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 22:57:58,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:57:58,987 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-06 22:57:58,989 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:58:01,041 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 22:58:01,041 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:58:01,231 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:58:01,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:58:01,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576744409] [2023-11-06 22:58:01,232 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:58:01,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362445483] [2023-11-06 22:58:01,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362445483] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:58:01,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:58:01,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [11] total 13 [2023-11-06 22:58:01,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11905558] [2023-11-06 22:58:01,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:58:01,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:58:01,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:58:01,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:58:01,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2023-11-06 22:58:01,234 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-06 22:58:01,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:58:01,371 INFO L93 Difference]: Finished difference Result 67 states and 78 transitions. [2023-11-06 22:58:01,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:58:01,372 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 32 [2023-11-06 22:58:01,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:58:01,373 INFO L225 Difference]: With dead ends: 67 [2023-11-06 22:58:01,373 INFO L226 Difference]: Without dead ends: 57 [2023-11-06 22:58:01,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2023-11-06 22:58:01,375 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:58:01,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:58:01,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-11-06 22:58:01,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 53. [2023-11-06 22:58:01,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 40 states have (on average 1.15) internal successors, (46), 42 states have internal predecessors, (46), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-06 22:58:01,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2023-11-06 22:58:01,419 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 32 [2023-11-06 22:58:01,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:58:01,420 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2023-11-06 22:58:01,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-06 22:58:01,420 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2023-11-06 22:58:01,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-06 22:58:01,422 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:58:01,422 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:58:01,433 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33b74c54-b95e-4303-9200-8a9f7675259c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 22:58:01,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33b74c54-b95e-4303-9200-8a9f7675259c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-06 22:58:01,628 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:58:01,628 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:58:01,629 INFO L85 PathProgramCache]: Analyzing trace with hash -438771105, now seen corresponding path program 2 times [2023-11-06 22:58:01,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:58:01,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220049629] [2023-11-06 22:58:01,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:58:01,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:58:01,641 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:58:01,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1582747979] [2023-11-06 22:58:01,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:58:01,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:58:01,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33b74c54-b95e-4303-9200-8a9f7675259c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:58:01,643 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33b74c54-b95e-4303-9200-8a9f7675259c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:58:01,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33b74c54-b95e-4303-9200-8a9f7675259c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 22:58:03,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:58:03,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:58:03,259 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-06 22:58:03,261 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:58:03,402 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-06 22:58:03,402 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:58:08,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:58:08,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220049629] [2023-11-06 22:58:08,466 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:58:08,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582747979] [2023-11-06 22:58:08,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582747979] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:58:08,467 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:58:08,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2023-11-06 22:58:08,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189399561] [2023-11-06 22:58:08,467 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-06 22:58:08,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:58:08,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:58:08,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:58:08,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=122, Unknown=1, NotChecked=0, Total=156 [2023-11-06 22:58:08,469 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-06 22:58:08,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:58:08,981 INFO L93 Difference]: Finished difference Result 62 states and 69 transitions. [2023-11-06 22:58:08,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:58:08,982 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2023-11-06 22:58:08,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:58:08,983 INFO L225 Difference]: With dead ends: 62 [2023-11-06 22:58:08,983 INFO L226 Difference]: Without dead ends: 60 [2023-11-06 22:58:08,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=46, Invalid=163, Unknown=1, NotChecked=0, Total=210 [2023-11-06 22:58:08,984 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 12 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 22:58:08,985 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 93 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 22:58:08,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-11-06 22:58:09,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 37. [2023-11-06 22:58:09,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 28 states have internal predecessors, (30), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-06 22:58:09,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2023-11-06 22:58:09,002 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 36 [2023-11-06 22:58:09,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:58:09,002 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2023-11-06 22:58:09,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-06 22:58:09,003 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2023-11-06 22:58:09,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-06 22:58:09,004 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:58:09,004 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:58:09,015 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33b74c54-b95e-4303-9200-8a9f7675259c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-06 22:58:09,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33b74c54-b95e-4303-9200-8a9f7675259c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-06 22:58:09,211 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:58:09,212 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:58:09,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1971034289, now seen corresponding path program 3 times [2023-11-06 22:58:09,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:58:09,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776769719] [2023-11-06 22:58:09,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:58:09,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:58:09,228 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:58:09,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [669679230] [2023-11-06 22:58:09,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:58:09,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:58:09,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33b74c54-b95e-4303-9200-8a9f7675259c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:58:09,235 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33b74c54-b95e-4303-9200-8a9f7675259c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:58:09,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33b74c54-b95e-4303-9200-8a9f7675259c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 22:58:09,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-06 22:58:09,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:58:09,731 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-06 22:58:09,733 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:58:10,321 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-06 22:58:10,321 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:58:11,126 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-06 22:58:11,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:58:11,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776769719] [2023-11-06 22:58:11,126 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:58:11,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669679230] [2023-11-06 22:58:11,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669679230] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:58:11,127 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:58:11,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 16 [2023-11-06 22:58:11,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008334819] [2023-11-06 22:58:11,127 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:58:11,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-06 22:58:11,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:58:11,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-06 22:58:11,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2023-11-06 22:58:11,129 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand has 16 states, 15 states have (on average 2.4) internal successors, (36), 14 states have internal predecessors, (36), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2023-11-06 22:58:11,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:58:11,925 INFO L93 Difference]: Finished difference Result 59 states and 67 transitions. [2023-11-06 22:58:11,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 22:58:11,926 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.4) internal successors, (36), 14 states have internal predecessors, (36), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) Word has length 38 [2023-11-06 22:58:11,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:58:11,926 INFO L225 Difference]: With dead ends: 59 [2023-11-06 22:58:11,927 INFO L226 Difference]: Without dead ends: 42 [2023-11-06 22:58:11,927 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2023-11-06 22:58:11,928 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 13 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-06 22:58:11,928 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 156 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-06 22:58:11,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-11-06 22:58:11,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2023-11-06 22:58:11,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 29 states have (on average 1.103448275862069) internal successors, (32), 30 states have internal predecessors, (32), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-06 22:58:11,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2023-11-06 22:58:11,946 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 38 [2023-11-06 22:58:11,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:58:11,946 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2023-11-06 22:58:11,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.4) internal successors, (36), 14 states have internal predecessors, (36), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2023-11-06 22:58:11,947 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2023-11-06 22:58:11,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-06 22:58:11,948 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:58:11,948 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:58:11,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33b74c54-b95e-4303-9200-8a9f7675259c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 22:58:12,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33b74c54-b95e-4303-9200-8a9f7675259c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:58:12,155 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:58:12,155 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:58:12,155 INFO L85 PathProgramCache]: Analyzing trace with hash -275350004, now seen corresponding path program 4 times [2023-11-06 22:58:12,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:58:12,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551663590] [2023-11-06 22:58:12,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:58:12,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:58:12,167 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:58:12,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1356130189] [2023-11-06 22:58:12,167 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:58:12,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:58:12,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33b74c54-b95e-4303-9200-8a9f7675259c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:58:12,169 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33b74c54-b95e-4303-9200-8a9f7675259c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:58:12,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33b74c54-b95e-4303-9200-8a9f7675259c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 22:58:27,189 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:58:27,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:58:27,194 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 47 conjunts are in the unsatisfiable core [2023-11-06 22:58:27,196 INFO L285 TraceCheckSpWp]: Computing forward predicates...