./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1deee0b0-ec80-4d40-a4f2-9a91885dd66f/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1deee0b0-ec80-4d40-a4f2-9a91885dd66f/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1deee0b0-ec80-4d40-a4f2-9a91885dd66f/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1deee0b0-ec80-4d40-a4f2-9a91885dd66f/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1deee0b0-ec80-4d40-a4f2-9a91885dd66f/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1deee0b0-ec80-4d40-a4f2-9a91885dd66f/bin/uautomizer-verify-uCwYo4JHxu --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7f61497696f0e412e267c342267f07f29bf3ce290f707b3aa1a4f0ac00ff0274 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:39:40,211 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:39:40,294 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1deee0b0-ec80-4d40-a4f2-9a91885dd66f/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:39:40,300 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:39:40,301 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:39:40,332 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:39:40,337 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:39:40,338 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:39:40,339 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:39:40,341 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:39:40,342 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:39:40,343 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:39:40,343 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:39:40,344 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:39:40,344 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:39:40,345 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:39:40,345 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:39:40,346 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:39:40,346 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:39:40,347 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:39:40,347 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:39:40,348 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:39:40,348 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:39:40,349 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:39:40,349 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:39:40,350 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:39:40,351 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:39:40,351 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:39:40,352 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:39:40,352 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:39:40,354 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:39:40,354 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:39:40,355 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:39:40,355 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:39:40,355 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:39:40,355 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:39:40,356 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:39:40,356 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:39:40,356 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:39:40,357 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_1deee0b0-ec80-4d40-a4f2-9a91885dd66f/bin/uautomizer-verify-uCwYo4JHxu/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1deee0b0-ec80-4d40-a4f2-9a91885dd66f/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7f61497696f0e412e267c342267f07f29bf3ce290f707b3aa1a4f0ac00ff0274 [2023-11-19 07:39:40,644 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:39:40,667 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:39:40,669 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:39:40,671 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:39:40,671 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:39:40,673 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1deee0b0-ec80-4d40-a4f2-9a91885dd66f/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound5.c [2023-11-19 07:39:44,012 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:39:44,254 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:39:44,255 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1deee0b0-ec80-4d40-a4f2-9a91885dd66f/sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound5.c [2023-11-19 07:39:44,264 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1deee0b0-ec80-4d40-a4f2-9a91885dd66f/bin/uautomizer-verify-uCwYo4JHxu/data/40952b975/6e4d8a2f72dd46c284016f7563f51da7/FLAG93e5d879b [2023-11-19 07:39:44,283 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1deee0b0-ec80-4d40-a4f2-9a91885dd66f/bin/uautomizer-verify-uCwYo4JHxu/data/40952b975/6e4d8a2f72dd46c284016f7563f51da7 [2023-11-19 07:39:44,286 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:39:44,287 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:39:44,289 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:39:44,289 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:39:44,300 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:39:44,301 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:39:44" (1/1) ... [2023-11-19 07:39:44,302 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@714496e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:44, skipping insertion in model container [2023-11-19 07:39:44,303 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:39:44" (1/1) ... [2023-11-19 07:39:44,330 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:39:44,512 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_1deee0b0-ec80-4d40-a4f2-9a91885dd66f/sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound5.c[597,610] [2023-11-19 07:39:44,532 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:39:44,544 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:39:44,557 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_1deee0b0-ec80-4d40-a4f2-9a91885dd66f/sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound5.c[597,610] [2023-11-19 07:39:44,567 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:39:44,583 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:39:44,583 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:44 WrapperNode [2023-11-19 07:39:44,583 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:39:44,585 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:39:44,585 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:39:44,585 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:39:44,594 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:44" (1/1) ... [2023-11-19 07:39:44,602 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:44" (1/1) ... [2023-11-19 07:39:44,622 INFO L138 Inliner]: procedures = 14, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 55 [2023-11-19 07:39:44,623 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:39:44,623 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:39:44,624 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:39:44,624 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:39:44,634 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:44" (1/1) ... [2023-11-19 07:39:44,634 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:44" (1/1) ... [2023-11-19 07:39:44,636 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:44" (1/1) ... [2023-11-19 07:39:44,636 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:44" (1/1) ... [2023-11-19 07:39:44,639 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:44" (1/1) ... [2023-11-19 07:39:44,643 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:44" (1/1) ... [2023-11-19 07:39:44,644 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:44" (1/1) ... [2023-11-19 07:39:44,645 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:44" (1/1) ... [2023-11-19 07:39:44,647 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:39:44,648 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:39:44,648 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:39:44,648 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:39:44,649 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:44" (1/1) ... [2023-11-19 07:39:44,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:39:44,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1deee0b0-ec80-4d40-a4f2-9a91885dd66f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:39:44,698 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1deee0b0-ec80-4d40-a4f2-9a91885dd66f/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:39:44,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1deee0b0-ec80-4d40-a4f2-9a91885dd66f/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:39:44,741 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:39:44,742 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:39:44,742 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:39:44,742 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:39:44,743 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-19 07:39:44,743 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-19 07:39:44,814 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:39:44,816 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:39:44,977 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:39:44,986 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:39:44,986 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 07:39:44,990 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:39:44 BoogieIcfgContainer [2023-11-19 07:39:44,990 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:39:44,993 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:39:44,993 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:39:44,999 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:39:44,999 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:39:44" (1/3) ... [2023-11-19 07:39:45,000 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25d08b64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:39:44, skipping insertion in model container [2023-11-19 07:39:45,000 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:44" (2/3) ... [2023-11-19 07:39:45,000 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25d08b64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:39:45, skipping insertion in model container [2023-11-19 07:39:45,001 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:39:44" (3/3) ... [2023-11-19 07:39:45,002 INFO L112 eAbstractionObserver]: Analyzing ICFG bresenham-ll_unwindbound5.c [2023-11-19 07:39:45,024 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:39:45,024 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:39:45,077 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:39:45,084 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4f5cf9cd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:39:45,085 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 07:39:45,089 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 07:39:45,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-19 07:39:45,098 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:39:45,098 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:39:45,099 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:39:45,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:39:45,105 INFO L85 PathProgramCache]: Analyzing trace with hash 180444447, now seen corresponding path program 1 times [2023-11-19 07:39:45,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:39:45,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574869274] [2023-11-19 07:39:45,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:39:45,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:39:45,220 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:39:45,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [793394697] [2023-11-19 07:39:45,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:39:45,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:39:45,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1deee0b0-ec80-4d40-a4f2-9a91885dd66f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:39:45,223 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1deee0b0-ec80-4d40-a4f2-9a91885dd66f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:39:45,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1deee0b0-ec80-4d40-a4f2-9a91885dd66f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:39:45,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:39:45,300 INFO L262 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-19 07:39:45,310 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:39:45,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:39:45,560 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:39:45,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:39:45,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574869274] [2023-11-19 07:39:45,561 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:39:45,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793394697] [2023-11-19 07:39:45,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793394697] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:39:45,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:39:45,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 07:39:45,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775440213] [2023-11-19 07:39:45,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:39:45,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 07:39:45,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:39:45,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:39:45,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:39:45,629 INFO L87 Difference]: Start difference. First operand has 20 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:45,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:39:45,821 INFO L93 Difference]: Finished difference Result 52 states and 72 transitions. [2023-11-19 07:39:45,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:39:45,824 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-19 07:39:45,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:39:45,833 INFO L225 Difference]: With dead ends: 52 [2023-11-19 07:39:45,834 INFO L226 Difference]: Without dead ends: 25 [2023-11-19 07:39:45,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:39:45,841 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 14 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:39:45,842 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 62 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:39:45,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-11-19 07:39:45,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2023-11-19 07:39:45,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 07:39:45,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2023-11-19 07:39:45,889 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 8 [2023-11-19 07:39:45,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:39:45,889 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2023-11-19 07:39:45,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:39:45,890 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2023-11-19 07:39:45,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-19 07:39:45,891 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:39:45,891 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:39:45,919 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1deee0b0-ec80-4d40-a4f2-9a91885dd66f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:39:46,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1deee0b0-ec80-4d40-a4f2-9a91885dd66f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-19 07:39:46,108 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:39:46,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:39:46,109 INFO L85 PathProgramCache]: Analyzing trace with hash 2080570626, now seen corresponding path program 1 times [2023-11-19 07:39:46,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:39:46,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491076610] [2023-11-19 07:39:46,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:39:46,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:39:46,138 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:39:46,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [185018338] [2023-11-19 07:39:46,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:39:46,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:39:46,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1deee0b0-ec80-4d40-a4f2-9a91885dd66f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:39:46,144 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1deee0b0-ec80-4d40-a4f2-9a91885dd66f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:39:46,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1deee0b0-ec80-4d40-a4f2-9a91885dd66f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:39:46,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:39:46,201 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-19 07:39:46,204 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:39:46,472 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:39:46,472 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:39:46,648 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:39:46,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:39:46,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491076610] [2023-11-19 07:39:46,649 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:39:46,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185018338] [2023-11-19 07:39:46,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185018338] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:39:46,650 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:39:46,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2023-11-19 07:39:46,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624871815] [2023-11-19 07:39:46,651 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:39:46,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-19 07:39:46,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:39:46,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-19 07:39:46,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-11-19 07:39:46,656 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 11 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 07:39:46,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:39:46,927 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2023-11-19 07:39:46,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 07:39:46,928 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2023-11-19 07:39:46,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:39:46,929 INFO L225 Difference]: With dead ends: 41 [2023-11-19 07:39:46,929 INFO L226 Difference]: Without dead ends: 34 [2023-11-19 07:39:46,930 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2023-11-19 07:39:46,931 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 18 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 07:39:46,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 78 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 07:39:46,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-11-19 07:39:46,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2023-11-19 07:39:46,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 07:39:46,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2023-11-19 07:39:46,945 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 18 [2023-11-19 07:39:46,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:39:46,946 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2023-11-19 07:39:46,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 07:39:46,946 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2023-11-19 07:39:46,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-19 07:39:46,948 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:39:46,948 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:39:46,981 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1deee0b0-ec80-4d40-a4f2-9a91885dd66f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:39:47,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1deee0b0-ec80-4d40-a4f2-9a91885dd66f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:39:47,176 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:39:47,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:39:47,177 INFO L85 PathProgramCache]: Analyzing trace with hash 680664555, now seen corresponding path program 1 times [2023-11-19 07:39:47,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:39:47,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161397114] [2023-11-19 07:39:47,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:39:47,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:39:47,192 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:39:47,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [917877574] [2023-11-19 07:39:47,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:39:47,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:39:47,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1deee0b0-ec80-4d40-a4f2-9a91885dd66f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:39:47,197 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1deee0b0-ec80-4d40-a4f2-9a91885dd66f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:39:47,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1deee0b0-ec80-4d40-a4f2-9a91885dd66f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:39:47,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:39:47,269 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 07:39:47,276 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:39:47,321 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:39:47,322 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:39:47,365 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:39:47,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:39:47,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161397114] [2023-11-19 07:39:47,366 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:39:47,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917877574] [2023-11-19 07:39:47,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917877574] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:39:47,366 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:39:47,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2023-11-19 07:39:47,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979957090] [2023-11-19 07:39:47,367 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:39:47,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:39:47,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:39:47,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:39:47,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:39:47,370 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 07:39:47,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:39:47,467 INFO L93 Difference]: Finished difference Result 73 states and 81 transitions. [2023-11-19 07:39:47,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-19 07:39:47,468 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2023-11-19 07:39:47,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:39:47,469 INFO L225 Difference]: With dead ends: 73 [2023-11-19 07:39:47,470 INFO L226 Difference]: Without dead ends: 67 [2023-11-19 07:39:47,470 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-11-19 07:39:47,472 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 34 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:39:47,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 97 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:39:47,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-11-19 07:39:47,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 55. [2023-11-19 07:39:47,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 44 states have (on average 1.1818181818181819) internal successors, (52), 44 states have internal predecessors, (52), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-19 07:39:47,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2023-11-19 07:39:47,490 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 19 [2023-11-19 07:39:47,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:39:47,491 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2023-11-19 07:39:47,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 07:39:47,492 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2023-11-19 07:39:47,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-19 07:39:47,493 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:39:47,493 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:39:47,520 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1deee0b0-ec80-4d40-a4f2-9a91885dd66f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:39:47,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1deee0b0-ec80-4d40-a4f2-9a91885dd66f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:39:47,714 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:39:47,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:39:47,715 INFO L85 PathProgramCache]: Analyzing trace with hash 713886481, now seen corresponding path program 1 times [2023-11-19 07:39:47,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:39:47,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396077113] [2023-11-19 07:39:47,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:39:47,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:39:47,729 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:39:47,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [165786881] [2023-11-19 07:39:47,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:39:47,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:39:47,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1deee0b0-ec80-4d40-a4f2-9a91885dd66f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:39:47,732 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1deee0b0-ec80-4d40-a4f2-9a91885dd66f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:39:47,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1deee0b0-ec80-4d40-a4f2-9a91885dd66f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:39:47,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:39:47,800 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-19 07:39:47,807 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:39:48,214 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:39:48,214 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:39:48,898 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:39:48,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:39:48,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396077113] [2023-11-19 07:39:48,899 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:39:48,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165786881] [2023-11-19 07:39:48,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165786881] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:39:48,900 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:39:48,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2023-11-19 07:39:48,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710229482] [2023-11-19 07:39:48,900 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:39:48,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-19 07:39:48,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:39:48,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-19 07:39:48,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2023-11-19 07:39:48,903 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand has 22 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 19 states have internal predecessors, (32), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-19 07:39:51,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:39:51,669 INFO L93 Difference]: Finished difference Result 80 states and 93 transitions. [2023-11-19 07:39:51,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-19 07:39:51,670 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 19 states have internal predecessors, (32), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 25 [2023-11-19 07:39:51,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:39:51,671 INFO L225 Difference]: With dead ends: 80 [2023-11-19 07:39:51,672 INFO L226 Difference]: Without dead ends: 72 [2023-11-19 07:39:51,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=205, Invalid=917, Unknown=0, NotChecked=0, Total=1122 [2023-11-19 07:39:51,674 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 29 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 07:39:51,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 142 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 07:39:51,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-11-19 07:39:51,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 69. [2023-11-19 07:39:51,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 56 states have (on average 1.1607142857142858) internal successors, (65), 56 states have internal predecessors, (65), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-19 07:39:51,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 80 transitions. [2023-11-19 07:39:51,701 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 80 transitions. Word has length 25 [2023-11-19 07:39:51,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:39:51,702 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 80 transitions. [2023-11-19 07:39:51,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 19 states have internal predecessors, (32), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-19 07:39:51,702 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 80 transitions. [2023-11-19 07:39:51,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-19 07:39:51,704 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:39:51,704 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:39:51,725 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1deee0b0-ec80-4d40-a4f2-9a91885dd66f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:39:51,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1deee0b0-ec80-4d40-a4f2-9a91885dd66f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:39:51,925 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:39:51,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:39:51,926 INFO L85 PathProgramCache]: Analyzing trace with hash 2021783820, now seen corresponding path program 1 times [2023-11-19 07:39:51,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:39:51,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033383780] [2023-11-19 07:39:51,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:39:51,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:39:51,952 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:39:51,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [497367656] [2023-11-19 07:39:51,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:39:51,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:39:51,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1deee0b0-ec80-4d40-a4f2-9a91885dd66f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:39:51,954 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1deee0b0-ec80-4d40-a4f2-9a91885dd66f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:39:51,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1deee0b0-ec80-4d40-a4f2-9a91885dd66f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:39:52,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:39:52,014 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-19 07:39:52,017 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:39:52,197 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-19 07:39:52,197 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:39:52,394 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-19 07:39:52,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:39:52,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033383780] [2023-11-19 07:39:52,395 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:39:52,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497367656] [2023-11-19 07:39:52,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497367656] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:39:52,396 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:39:52,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2023-11-19 07:39:52,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649925073] [2023-11-19 07:39:52,396 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:39:52,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-19 07:39:52,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:39:52,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-19 07:39:52,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2023-11-19 07:39:52,399 INFO L87 Difference]: Start difference. First operand 69 states and 80 transitions. Second operand has 15 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 14 states have internal predecessors, (26), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 07:39:52,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:39:52,624 INFO L93 Difference]: Finished difference Result 87 states and 102 transitions. [2023-11-19 07:39:52,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-19 07:39:52,625 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 14 states have internal predecessors, (26), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 35 [2023-11-19 07:39:52,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:39:52,627 INFO L225 Difference]: With dead ends: 87 [2023-11-19 07:39:52,627 INFO L226 Difference]: Without dead ends: 81 [2023-11-19 07:39:52,628 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2023-11-19 07:39:52,629 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 27 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:39:52,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 92 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:39:52,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-11-19 07:39:52,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2023-11-19 07:39:52,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 65 states have (on average 1.1692307692307693) internal successors, (76), 65 states have internal predecessors, (76), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-19 07:39:52,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 93 transitions. [2023-11-19 07:39:52,658 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 93 transitions. Word has length 35 [2023-11-19 07:39:52,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:39:52,658 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 93 transitions. [2023-11-19 07:39:52,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 14 states have internal predecessors, (26), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 07:39:52,659 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 93 transitions. [2023-11-19 07:39:52,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-19 07:39:52,661 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:39:52,661 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:39:52,688 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1deee0b0-ec80-4d40-a4f2-9a91885dd66f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 07:39:52,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1deee0b0-ec80-4d40-a4f2-9a91885dd66f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:39:52,877 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:39:52,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:39:52,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1410392757, now seen corresponding path program 1 times [2023-11-19 07:39:52,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:39:52,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699183227] [2023-11-19 07:39:52,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:39:52,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:39:52,904 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:39:52,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1760735252] [2023-11-19 07:39:52,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:39:52,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:39:52,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1deee0b0-ec80-4d40-a4f2-9a91885dd66f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:39:52,912 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1deee0b0-ec80-4d40-a4f2-9a91885dd66f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:39:52,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1deee0b0-ec80-4d40-a4f2-9a91885dd66f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 07:39:52,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:39:53,000 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-19 07:39:53,004 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:39:54,031 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 17 proven. 33 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-19 07:39:54,031 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:39:54,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:39:54,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699183227] [2023-11-19 07:39:54,605 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:39:54,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760735252] [2023-11-19 07:39:54,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760735252] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:39:54,605 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:39:54,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2023-11-19 07:39:54,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560419103] [2023-11-19 07:39:54,606 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-19 07:39:54,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-19 07:39:54,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:39:54,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-19 07:39:54,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2023-11-19 07:39:54,608 INFO L87 Difference]: Start difference. First operand 79 states and 93 transitions. Second operand has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-19 07:39:55,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:39:55,232 INFO L93 Difference]: Finished difference Result 115 states and 138 transitions. [2023-11-19 07:39:55,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-19 07:39:55,233 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 45 [2023-11-19 07:39:55,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:39:55,234 INFO L225 Difference]: With dead ends: 115 [2023-11-19 07:39:55,234 INFO L226 Difference]: Without dead ends: 91 [2023-11-19 07:39:55,235 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2023-11-19 07:39:55,236 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 9 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 07:39:55,236 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 132 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 07:39:55,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-11-19 07:39:55,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 85. [2023-11-19 07:39:55,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 70 states have (on average 1.1571428571428573) internal successors, (81), 70 states have internal predecessors, (81), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-19 07:39:55,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 100 transitions. [2023-11-19 07:39:55,263 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 100 transitions. Word has length 45 [2023-11-19 07:39:55,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:39:55,263 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 100 transitions. [2023-11-19 07:39:55,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-19 07:39:55,264 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 100 transitions. [2023-11-19 07:39:55,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-19 07:39:55,266 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:39:55,266 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:39:55,292 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1deee0b0-ec80-4d40-a4f2-9a91885dd66f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 07:39:55,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1deee0b0-ec80-4d40-a4f2-9a91885dd66f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-19 07:39:55,488 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:39:55,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:39:55,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1900020427, now seen corresponding path program 2 times [2023-11-19 07:39:55,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:39:55,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537687885] [2023-11-19 07:39:55,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:39:55,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:39:55,514 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:39:55,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1659499447] [2023-11-19 07:39:55,515 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:39:55,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:39:55,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1deee0b0-ec80-4d40-a4f2-9a91885dd66f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:39:55,519 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1deee0b0-ec80-4d40-a4f2-9a91885dd66f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:39:55,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1deee0b0-ec80-4d40-a4f2-9a91885dd66f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 07:39:55,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:39:55,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:39:55,592 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 07:39:55,597 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:39:55,646 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 32 proven. 16 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-19 07:39:55,646 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:39:55,724 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 22 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-19 07:39:55,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:39:55,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537687885] [2023-11-19 07:39:55,725 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:39:55,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659499447] [2023-11-19 07:39:55,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659499447] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:39:55,725 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:39:55,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2023-11-19 07:39:55,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135374780] [2023-11-19 07:39:55,726 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:39:55,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 07:39:55,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:39:55,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:39:55,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:39:55,730 INFO L87 Difference]: Start difference. First operand 85 states and 100 transitions. Second operand has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-19 07:39:55,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:39:55,825 INFO L93 Difference]: Finished difference Result 120 states and 144 transitions. [2023-11-19 07:39:55,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:39:55,826 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 45 [2023-11-19 07:39:55,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:39:55,828 INFO L225 Difference]: With dead ends: 120 [2023-11-19 07:39:55,829 INFO L226 Difference]: Without dead ends: 96 [2023-11-19 07:39:55,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:39:55,831 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 5 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:39:55,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 72 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:39:55,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2023-11-19 07:39:55,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 94. [2023-11-19 07:39:55,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 77 states have (on average 1.155844155844156) internal successors, (89), 77 states have internal predecessors, (89), 12 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-19 07:39:55,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 112 transitions. [2023-11-19 07:39:55,877 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 112 transitions. Word has length 45 [2023-11-19 07:39:55,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:39:55,877 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 112 transitions. [2023-11-19 07:39:55,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-19 07:39:55,878 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 112 transitions. [2023-11-19 07:39:55,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-19 07:39:55,879 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:39:55,879 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:39:55,903 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1deee0b0-ec80-4d40-a4f2-9a91885dd66f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 07:39:56,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1deee0b0-ec80-4d40-a4f2-9a91885dd66f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-19 07:39:56,099 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:39:56,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:39:56,099 INFO L85 PathProgramCache]: Analyzing trace with hash 2040569037, now seen corresponding path program 3 times [2023-11-19 07:39:56,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:39:56,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567307268] [2023-11-19 07:39:56,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:39:56,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:39:56,123 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:39:56,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [514435744] [2023-11-19 07:39:56,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 07:39:56,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:39:56,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1deee0b0-ec80-4d40-a4f2-9a91885dd66f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:39:56,125 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1deee0b0-ec80-4d40-a4f2-9a91885dd66f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:39:56,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1deee0b0-ec80-4d40-a4f2-9a91885dd66f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 07:39:56,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-19 07:39:56,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:39:56,321 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-19 07:39:56,324 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:39:56,496 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 32 proven. 1 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-11-19 07:39:56,496 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:39:56,849 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 32 proven. 1 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-11-19 07:39:56,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:39:56,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567307268] [2023-11-19 07:39:56,849 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:39:56,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514435744] [2023-11-19 07:39:56,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514435744] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:39:56,850 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:39:56,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2023-11-19 07:39:56,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119020183] [2023-11-19 07:39:56,851 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:39:56,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-19 07:39:56,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:39:56,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-19 07:39:56,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2023-11-19 07:39:56,853 INFO L87 Difference]: Start difference. First operand 94 states and 112 transitions. Second operand has 20 states, 16 states have (on average 2.125) internal successors, (34), 17 states have internal predecessors, (34), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 07:39:57,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:39:57,411 INFO L93 Difference]: Finished difference Result 101 states and 118 transitions. [2023-11-19 07:39:57,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-19 07:39:57,412 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 2.125) internal successors, (34), 17 states have internal predecessors, (34), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 45 [2023-11-19 07:39:57,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:39:57,413 INFO L225 Difference]: With dead ends: 101 [2023-11-19 07:39:57,413 INFO L226 Difference]: Without dead ends: 95 [2023-11-19 07:39:57,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=152, Invalid=718, Unknown=0, NotChecked=0, Total=870 [2023-11-19 07:39:57,415 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 25 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 07:39:57,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 114 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 07:39:57,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-11-19 07:39:57,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 80. [2023-11-19 07:39:57,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 65 states have (on average 1.1076923076923078) internal successors, (72), 65 states have internal predecessors, (72), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-19 07:39:57,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 91 transitions. [2023-11-19 07:39:57,442 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 91 transitions. Word has length 45 [2023-11-19 07:39:57,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:39:57,443 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 91 transitions. [2023-11-19 07:39:57,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 2.125) internal successors, (34), 17 states have internal predecessors, (34), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 07:39:57,443 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 91 transitions. [2023-11-19 07:39:57,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-19 07:39:57,444 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:39:57,445 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:39:57,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1deee0b0-ec80-4d40-a4f2-9a91885dd66f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-19 07:39:57,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1deee0b0-ec80-4d40-a4f2-9a91885dd66f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:39:57,651 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:39:57,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:39:57,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1582515168, now seen corresponding path program 1 times [2023-11-19 07:39:57,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:39:57,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979917239] [2023-11-19 07:39:57,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:39:57,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:39:57,662 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:39:57,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2034831169] [2023-11-19 07:39:57,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:39:57,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:39:57,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1deee0b0-ec80-4d40-a4f2-9a91885dd66f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:39:57,665 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1deee0b0-ec80-4d40-a4f2-9a91885dd66f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:39:57,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1deee0b0-ec80-4d40-a4f2-9a91885dd66f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 07:39:57,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:39:57,749 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-19 07:39:57,752 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:39:57,847 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 8 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:39:57,847 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:39:57,930 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 8 proven. 44 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-19 07:39:57,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:39:57,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979917239] [2023-11-19 07:39:57,930 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:39:57,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034831169] [2023-11-19 07:39:57,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034831169] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:39:57,931 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:39:57,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 8 [2023-11-19 07:39:57,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070406457] [2023-11-19 07:39:57,932 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:39:57,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:39:57,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:39:57,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:39:57,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:39:57,934 INFO L87 Difference]: Start difference. First operand 80 states and 91 transitions. Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 5 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-11-19 07:39:58,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:39:58,037 INFO L93 Difference]: Finished difference Result 96 states and 108 transitions. [2023-11-19 07:39:58,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 07:39:58,038 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 5 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 49 [2023-11-19 07:39:58,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:39:58,039 INFO L225 Difference]: With dead ends: 96 [2023-11-19 07:39:58,040 INFO L226 Difference]: Without dead ends: 90 [2023-11-19 07:39:58,040 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 84 SyntacticMatches, 6 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2023-11-19 07:39:58,041 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 7 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:39:58,041 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 77 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:39:58,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2023-11-19 07:39:58,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2023-11-19 07:39:58,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 73 states have (on average 1.1095890410958904) internal successors, (81), 73 states have internal predecessors, (81), 11 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-19 07:39:58,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 102 transitions. [2023-11-19 07:39:58,070 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 102 transitions. Word has length 49 [2023-11-19 07:39:58,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:39:58,070 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 102 transitions. [2023-11-19 07:39:58,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 5 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-11-19 07:39:58,071 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 102 transitions. [2023-11-19 07:39:58,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-11-19 07:39:58,072 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:39:58,072 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:39:58,098 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1deee0b0-ec80-4d40-a4f2-9a91885dd66f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-19 07:39:58,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1deee0b0-ec80-4d40-a4f2-9a91885dd66f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:39:58,293 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:39:58,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:39:58,294 INFO L85 PathProgramCache]: Analyzing trace with hash -185688227, now seen corresponding path program 2 times [2023-11-19 07:39:58,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:39:58,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828719536] [2023-11-19 07:39:58,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:39:58,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:39:58,305 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:39:58,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1424992265] [2023-11-19 07:39:58,306 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:39:58,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:39:58,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1deee0b0-ec80-4d40-a4f2-9a91885dd66f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:39:58,307 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1deee0b0-ec80-4d40-a4f2-9a91885dd66f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:39:58,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1deee0b0-ec80-4d40-a4f2-9a91885dd66f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-19 07:39:58,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:39:58,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:39:58,392 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-19 07:39:58,395 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:39:58,885 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 10 proven. 70 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-19 07:39:58,886 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:39:59,673 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 10 proven. 70 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-19 07:39:59,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:39:59,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828719536] [2023-11-19 07:39:59,673 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:39:59,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424992265] [2023-11-19 07:39:59,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424992265] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:39:59,674 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:39:59,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 28 [2023-11-19 07:39:59,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167188724] [2023-11-19 07:39:59,674 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:39:59,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-19 07:39:59,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:39:59,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-19 07:39:59,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=641, Unknown=0, NotChecked=0, Total=756 [2023-11-19 07:39:59,677 INFO L87 Difference]: Start difference. First operand 90 states and 102 transitions. Second operand has 28 states, 26 states have (on average 2.5) internal successors, (65), 27 states have internal predecessors, (65), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-19 07:40:00,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:40:00,525 INFO L93 Difference]: Finished difference Result 138 states and 155 transitions. [2023-11-19 07:40:00,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-19 07:40:00,527 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 2.5) internal successors, (65), 27 states have internal predecessors, (65), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 59 [2023-11-19 07:40:00,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:40:00,528 INFO L225 Difference]: With dead ends: 138 [2023-11-19 07:40:00,528 INFO L226 Difference]: Without dead ends: 130 [2023-11-19 07:40:00,530 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 88 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=228, Invalid=1178, Unknown=0, NotChecked=0, Total=1406 [2023-11-19 07:40:00,530 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 32 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 07:40:00,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 279 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 07:40:00,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2023-11-19 07:40:00,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 118. [2023-11-19 07:40:00,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 95 states have (on average 1.105263157894737) internal successors, (105), 95 states have internal predecessors, (105), 13 states have call successors, (13), 10 states have call predecessors, (13), 9 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-19 07:40:00,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 130 transitions. [2023-11-19 07:40:00,562 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 130 transitions. Word has length 59 [2023-11-19 07:40:00,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:40:00,563 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 130 transitions. [2023-11-19 07:40:00,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 2.5) internal successors, (65), 27 states have internal predecessors, (65), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-19 07:40:00,563 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 130 transitions. [2023-11-19 07:40:00,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-11-19 07:40:00,564 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:40:00,564 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:40:00,586 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1deee0b0-ec80-4d40-a4f2-9a91885dd66f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-19 07:40:00,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1deee0b0-ec80-4d40-a4f2-9a91885dd66f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:00,785 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:40:00,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:00,785 INFO L85 PathProgramCache]: Analyzing trace with hash 494370143, now seen corresponding path program 1 times [2023-11-19 07:40:00,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:00,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675797525] [2023-11-19 07:40:00,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:00,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:00,799 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:40:00,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1788516829] [2023-11-19 07:40:00,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:00,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:00,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1deee0b0-ec80-4d40-a4f2-9a91885dd66f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:40:00,801 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1deee0b0-ec80-4d40-a4f2-9a91885dd66f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:40:00,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1deee0b0-ec80-4d40-a4f2-9a91885dd66f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-19 07:40:00,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:40:00,874 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:40:00,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:40:00,958 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:40:00,962 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 07:40:00,963 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-11-19 07:40:00,986 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1deee0b0-ec80-4d40-a4f2-9a91885dd66f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-19 07:40:01,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1deee0b0-ec80-4d40-a4f2-9a91885dd66f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:01,182 INFO L445 BasicCegarLoop]: Path program histogram: [3, 2, 1, 1, 1, 1, 1, 1] [2023-11-19 07:40:01,185 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-19 07:40:01,207 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-11-19 07:40:01,210 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-11-19 07:40:01,211 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-11-19 07:40:01,213 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-11-19 07:40:01,215 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-11-19 07:40:01,226 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-11-19 07:40:01,238 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 07:40:01 BoogieIcfgContainer [2023-11-19 07:40:01,238 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-19 07:40:01,239 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-19 07:40:01,240 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-19 07:40:01,240 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-19 07:40:01,240 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:39:44" (3/4) ... [2023-11-19 07:40:01,241 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-11-19 07:40:01,251 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-11-19 07:40:01,252 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-11-19 07:40:01,253 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-11-19 07:40:01,254 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-11-19 07:40:01,256 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-11-19 07:40:01,257 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-11-19 07:40:01,303 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1deee0b0-ec80-4d40-a4f2-9a91885dd66f/bin/uautomizer-verify-uCwYo4JHxu/witness.graphml [2023-11-19 07:40:01,304 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-19 07:40:01,304 INFO L158 Benchmark]: Toolchain (without parser) took 17017.06ms. Allocated memory was 176.2MB in the beginning and 216.0MB in the end (delta: 39.8MB). Free memory was 140.5MB in the beginning and 177.2MB in the end (delta: -36.7MB). Peak memory consumption was 5.0MB. Max. memory is 16.1GB. [2023-11-19 07:40:01,305 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 107.0MB. Free memory is still 56.8MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-19 07:40:01,305 INFO L158 Benchmark]: CACSL2BoogieTranslator took 294.83ms. Allocated memory is still 176.2MB. Free memory was 140.5MB in the beginning and 129.8MB in the end (delta: 10.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-19 07:40:01,306 INFO L158 Benchmark]: Boogie Procedure Inliner took 38.14ms. Allocated memory is still 176.2MB. Free memory was 129.8MB in the beginning and 128.3MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-19 07:40:01,306 INFO L158 Benchmark]: Boogie Preprocessor took 23.56ms. Allocated memory is still 176.2MB. Free memory was 128.3MB in the beginning and 126.7MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-19 07:40:01,306 INFO L158 Benchmark]: RCFGBuilder took 342.25ms. Allocated memory is still 176.2MB. Free memory was 126.7MB in the beginning and 116.3MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-19 07:40:01,307 INFO L158 Benchmark]: TraceAbstraction took 16245.74ms. Allocated memory was 176.2MB in the beginning and 216.0MB in the end (delta: 39.8MB). Free memory was 115.8MB in the beginning and 181.3MB in the end (delta: -65.5MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-19 07:40:01,307 INFO L158 Benchmark]: Witness Printer took 64.61ms. Allocated memory is still 216.0MB. Free memory was 181.3MB in the beginning and 177.2MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-19 07:40:01,309 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 107.0MB. Free memory is still 56.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 294.83ms. Allocated memory is still 176.2MB. Free memory was 140.5MB in the beginning and 129.8MB in the end (delta: 10.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 38.14ms. Allocated memory is still 176.2MB. Free memory was 129.8MB in the beginning and 128.3MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 23.56ms. Allocated memory is still 176.2MB. Free memory was 128.3MB in the beginning and 126.7MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 342.25ms. Allocated memory is still 176.2MB. Free memory was 126.7MB in the beginning and 116.3MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 16245.74ms. Allocated memory was 176.2MB in the beginning and 216.0MB in the end (delta: 39.8MB). Free memory was 115.8MB in the beginning and 181.3MB in the end (delta: -65.5MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 64.61ms. Allocated memory is still 216.0MB. Free memory was 181.3MB in the beginning and 177.2MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 16]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L21] int counter = 0; VAL [counter=0] [L23] int X, Y; [L24] long long x, y, v, xy, yx; [L25] X = __VERIFIER_nondet_int() [L26] Y = __VERIFIER_nondet_int() [L27] v = ((long long) 2 * Y) - X [L28] y = 0 [L29] x = 0 VAL [X=9, Y=1, counter=0, v=-7, x=0, y=0] [L31] EXPR counter++ VAL [X=9, Y=1, counter=1, v=-7, x=0, y=0] [L31] COND TRUE counter++<5 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y VAL [X=9, Y=1, counter=1, v=-7, x=0, x=0, x=0, y=0] [L34] CALL __VERIFIER_assert( 2*yx - 2*xy - X + (long long) 2*Y - v == 0) VAL [\old(cond)=1, counter=1] [L14] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L34] RET __VERIFIER_assert( 2*yx - 2*xy - X + (long long) 2*Y - v == 0) VAL [X=9, Y=1, counter=1, v=-7, x=0, x=0, x=0, y=0] [L35] COND FALSE !(!(x <= X)) VAL [X=9, Y=1, counter=1, v=-7, x=0, x=0, x=0, y=0] [L39] COND TRUE v < 0 [L40] v = v + (long long) 2 * Y VAL [X=9, Y=1, counter=1, v=-5, x=0, x=0, x=0, y=0] [L45] x++ VAL [X=9, Y=1, counter=1, v=-5, x=0, x=0, x=1, y=0] [L31] EXPR counter++ VAL [X=9, Y=1, counter=2, v=-5, x=0, x=0, x=1, y=0] [L31] COND TRUE counter++<5 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y VAL [X=9, Y=1, counter=2, v=-5, x=0, x=1, x=1, y=0] [L34] CALL __VERIFIER_assert( 2*yx - 2*xy - X + (long long) 2*Y - v == 0) VAL [\old(cond)=1, counter=2] [L14] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L34] RET __VERIFIER_assert( 2*yx - 2*xy - X + (long long) 2*Y - v == 0) VAL [X=9, Y=1, counter=2, v=-5, x=0, x=1, x=1, y=0] [L35] COND FALSE !(!(x <= X)) VAL [X=9, Y=1, counter=2, v=-5, x=0, x=1, x=1, y=0] [L39] COND TRUE v < 0 [L40] v = v + (long long) 2 * Y VAL [X=9, Y=1, counter=2, v=-3, x=0, x=1, x=1, y=0] [L45] x++ VAL [X=9, Y=1, counter=2, v=-3, x=0, x=1, x=2, y=0] [L31] EXPR counter++ VAL [X=9, Y=1, counter=3, v=-3, x=0, x=1, x=2, y=0] [L31] COND TRUE counter++<5 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y VAL [X=9, Y=1, counter=3, v=-3, x=0, x=2, x=2, y=0] [L34] CALL __VERIFIER_assert( 2*yx - 2*xy - X + (long long) 2*Y - v == 0) VAL [\old(cond)=1, counter=3] [L14] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=3] [L34] RET __VERIFIER_assert( 2*yx - 2*xy - X + (long long) 2*Y - v == 0) VAL [X=9, Y=1, counter=3, v=-3, x=0, x=2, x=2, y=0] [L35] COND FALSE !(!(x <= X)) VAL [X=9, Y=1, counter=3, v=-3, x=0, x=2, x=2, y=0] [L39] COND TRUE v < 0 [L40] v = v + (long long) 2 * Y VAL [X=9, Y=1, counter=3, v=-1, x=0, x=2, x=2, y=0] [L45] x++ VAL [X=9, Y=1, counter=3, v=-1, x=0, x=2, x=3, y=0] [L31] EXPR counter++ VAL [X=9, Y=1, counter=4, v=-1, x=0, x=2, x=3, y=0] [L31] COND TRUE counter++<5 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y VAL [X=9, Y=1, counter=4, v=-1, x=0, x=3, x=3, y=0] [L34] CALL __VERIFIER_assert( 2*yx - 2*xy - X + (long long) 2*Y - v == 0) VAL [\old(cond)=1, counter=4] [L14] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=4] [L34] RET __VERIFIER_assert( 2*yx - 2*xy - X + (long long) 2*Y - v == 0) VAL [X=9, Y=1, counter=4, v=-1, x=0, x=3, x=3, y=0] [L35] COND FALSE !(!(x <= X)) VAL [X=9, Y=1, counter=4, v=-1, x=0, x=3, x=3, y=0] [L39] COND TRUE v < 0 [L40] v = v + (long long) 2 * Y VAL [X=9, Y=1, counter=4, v=1, x=0, x=3, x=3, y=0] [L45] x++ VAL [X=9, Y=1, counter=4, v=1, x=0, x=3, x=4, y=0] [L31] EXPR counter++ VAL [X=9, Y=1, counter=5, v=1, x=0, x=3, x=4, y=0] [L31] COND TRUE counter++<5 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y VAL [X=9, Y=1, counter=5, v=1, x=0, x=4, x=4, y=0] [L34] CALL __VERIFIER_assert( 2*yx - 2*xy - X + (long long) 2*Y - v == 0) VAL [\old(cond)=1, counter=5] [L14] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L34] RET __VERIFIER_assert( 2*yx - 2*xy - X + (long long) 2*Y - v == 0) VAL [X=9, Y=1, counter=5, v=1, x=0, x=4, x=4, y=0] [L35] COND FALSE !(!(x <= X)) VAL [X=9, Y=1, counter=5, v=1, x=0, x=4, x=4, y=0] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [X=9, Y=1, counter=5, v=-15, x=0, x=4, x=4, y=1] [L45] x++ VAL [X=9, Y=1, counter=5, v=-15, x=0, x=4, x=5, y=1] [L31] EXPR counter++ VAL [X=9, Y=1, counter=6, v=-15, x=0, x=4, x=5, y=1] [L31] COND FALSE !(counter++<5) [L47] xy = (long long) x*y [L48] yx = (long long) Y*x VAL [X=9, Y=1, counter=6, v=-15, x=5, x=5, x=5, y=1] [L49] CALL __VERIFIER_assert(2*yx - 2*xy - X + (long long) 2*Y - v + 2*y == 0) VAL [\old(cond)=0, counter=6] [L14] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, counter=6] [L16] reach_error() VAL [\old(cond)=0, cond=0, counter=6] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 16.1s, OverallIterations: 11, TraceHistogramMax: 6, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 5.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 204 SdHoareTripleChecker+Valid, 1.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 200 mSDsluCounter, 1145 SdHoareTripleChecker+Invalid, 1.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 998 mSDsCounter, 95 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1699 IncrementalHoareTripleChecker+Invalid, 1794 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 95 mSolverCounterUnsat, 147 mSDtfsCounter, 1699 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 695 GetRequests, 503 SyntacticMatches, 14 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 639 ImplicationChecksByTransitivity, 6.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=118occurred in iteration=10, InterpolantAutomatonStates: 133, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 10 MinimizatonAttempts, 55 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 6.0s InterpolantComputationTime, 407 NumberOfCodeBlocks, 387 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 625 ConstructedInterpolants, 1 QuantifiedInterpolants, 4027 SizeOfPredicates, 43 NumberOfNonLiveVariables, 1092 ConjunctsInSsa, 195 ConjunctsInUnsatCore, 18 InterpolantComputations, 1 PerfectInterpolantSequences, 469/808 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-11-19 07:40:01,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1deee0b0-ec80-4d40-a4f2-9a91885dd66f/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE