./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/soft_float_2a.c.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 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_c3ddd159-0e32-40ae-84b1-2ea903d1b1a2/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ddd159-0e32-40ae-84b1-2ea903d1b1a2/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ddd159-0e32-40ae-84b1-2ea903d1b1a2/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ddd159-0e32-40ae-84b1-2ea903d1b1a2/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/bitvector/soft_float_2a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ddd159-0e32-40ae-84b1-2ea903d1b1a2/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ddd159-0e32-40ae-84b1-2ea903d1b1a2/bin/uautomizer-verify-uTZkv6EMXl --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 f330893f1140a32f6e6dacd6cc5115391759545d59ea17334f6f3b644ed5a51c --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:12:20,503 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:12:20,621 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ddd159-0e32-40ae-84b1-2ea903d1b1a2/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-12 02:12:20,632 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:12:20,633 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:12:20,671 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:12:20,671 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:12:20,672 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:12:20,674 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:12:20,679 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:12:20,680 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:12:20,681 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:12:20,681 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:12:20,683 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:12:20,683 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:12:20,684 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:12:20,684 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:12:20,685 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:12:20,685 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:12:20,686 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:12:20,686 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:12:20,687 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:12:20,687 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:12:20,688 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:12:20,688 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:12:20,689 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:12:20,690 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:12:20,690 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:12:20,691 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:12:20,691 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:12:20,693 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:12:20,693 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:12:20,693 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:12:20,694 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:12:20,694 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:12:20,694 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:12:20,695 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:12:20,695 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:12:20,695 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:12:20,695 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_c3ddd159-0e32-40ae-84b1-2ea903d1b1a2/bin/uautomizer-verify-uTZkv6EMXl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ddd159-0e32-40ae-84b1-2ea903d1b1a2/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f330893f1140a32f6e6dacd6cc5115391759545d59ea17334f6f3b644ed5a51c [2023-11-12 02:12:20,961 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:12:20,992 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:12:20,995 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:12:21,013 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:12:21,014 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:12:21,015 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ddd159-0e32-40ae-84b1-2ea903d1b1a2/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/bitvector/soft_float_2a.c.cil.c [2023-11-12 02:12:24,103 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:12:24,290 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:12:24,291 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ddd159-0e32-40ae-84b1-2ea903d1b1a2/sv-benchmarks/c/bitvector/soft_float_2a.c.cil.c [2023-11-12 02:12:24,300 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ddd159-0e32-40ae-84b1-2ea903d1b1a2/bin/uautomizer-verify-uTZkv6EMXl/data/d667285b2/fecd4af2a64b4662ab5375c42c4ccd40/FLAGcc6893308 [2023-11-12 02:12:24,315 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ddd159-0e32-40ae-84b1-2ea903d1b1a2/bin/uautomizer-verify-uTZkv6EMXl/data/d667285b2/fecd4af2a64b4662ab5375c42c4ccd40 [2023-11-12 02:12:24,318 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:12:24,320 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:12:24,321 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:12:24,321 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:12:24,327 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:12:24,327 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:12:24" (1/1) ... [2023-11-12 02:12:24,328 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b5424aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:12:24, skipping insertion in model container [2023-11-12 02:12:24,329 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:12:24" (1/1) ... [2023-11-12 02:12:24,360 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:12:24,551 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_c3ddd159-0e32-40ae-84b1-2ea903d1b1a2/sv-benchmarks/c/bitvector/soft_float_2a.c.cil.c[728,741] [2023-11-12 02:12:24,632 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:12:24,652 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:12:24,673 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_c3ddd159-0e32-40ae-84b1-2ea903d1b1a2/sv-benchmarks/c/bitvector/soft_float_2a.c.cil.c[728,741] [2023-11-12 02:12:24,723 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:12:24,746 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:12:24,747 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:12:24 WrapperNode [2023-11-12 02:12:24,747 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:12:24,748 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:12:24,749 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:12:24,749 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:12:24,757 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:12:24" (1/1) ... [2023-11-12 02:12:24,766 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:12:24" (1/1) ... [2023-11-12 02:12:24,793 INFO L138 Inliner]: procedures = 17, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 146 [2023-11-12 02:12:24,794 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:12:24,794 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:12:24,795 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:12:24,795 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:12:24,805 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:12:24" (1/1) ... [2023-11-12 02:12:24,805 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:12:24" (1/1) ... [2023-11-12 02:12:24,808 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:12:24" (1/1) ... [2023-11-12 02:12:24,808 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:12:24" (1/1) ... [2023-11-12 02:12:24,815 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:12:24" (1/1) ... [2023-11-12 02:12:24,820 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:12:24" (1/1) ... [2023-11-12 02:12:24,822 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:12:24" (1/1) ... [2023-11-12 02:12:24,824 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:12:24" (1/1) ... [2023-11-12 02:12:24,827 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:12:24,828 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:12:24,828 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:12:24,829 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:12:24,829 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:12:24" (1/1) ... [2023-11-12 02:12:24,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:12:24,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ddd159-0e32-40ae-84b1-2ea903d1b1a2/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:12:24,866 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ddd159-0e32-40ae-84b1-2ea903d1b1a2/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:12:24,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ddd159-0e32-40ae-84b1-2ea903d1b1a2/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:12:24,905 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:12:24,905 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:12:24,905 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2023-11-12 02:12:24,905 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2023-11-12 02:12:24,905 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:12:24,906 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:12:24,906 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-12 02:12:24,906 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-12 02:12:24,990 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:12:24,992 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:12:25,442 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:12:25,449 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:12:25,450 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-12 02:12:25,452 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:12:25 BoogieIcfgContainer [2023-11-12 02:12:25,452 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:12:25,455 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:12:25,456 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:12:25,459 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:12:25,459 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:12:24" (1/3) ... [2023-11-12 02:12:25,460 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7653c2df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:12:25, skipping insertion in model container [2023-11-12 02:12:25,460 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:12:24" (2/3) ... [2023-11-12 02:12:25,461 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7653c2df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:12:25, skipping insertion in model container [2023-11-12 02:12:25,461 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:12:25" (3/3) ... [2023-11-12 02:12:25,462 INFO L112 eAbstractionObserver]: Analyzing ICFG soft_float_2a.c.cil.c [2023-11-12 02:12:25,503 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:12:25,503 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 02:12:25,571 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:12:25,578 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;@35e4799e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:12:25,578 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 02:12:25,584 INFO L276 IsEmpty]: Start isEmpty. Operand has 69 states, 60 states have (on average 1.6) internal successors, (96), 62 states have internal predecessors, (96), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-12 02:12:25,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-12 02:12:25,600 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:12:25,600 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:12:25,602 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:12:25,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:12:25,611 INFO L85 PathProgramCache]: Analyzing trace with hash -180639892, now seen corresponding path program 1 times [2023-11-12 02:12:25,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:12:25,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34608379] [2023-11-12 02:12:25,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:12:25,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:12:25,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:25,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:12:25,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:25,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-12 02:12:25,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:25,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-12 02:12:25,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:26,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-12 02:12:26,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:26,023 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-12 02:12:26,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:12:26,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34608379] [2023-11-12 02:12:26,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34608379] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:12:26,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:12:26,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:12:26,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149805245] [2023-11-12 02:12:26,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:12:26,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:12:26,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:12:26,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:12:26,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:12:26,083 INFO L87 Difference]: Start difference. First operand has 69 states, 60 states have (on average 1.6) internal successors, (96), 62 states have internal predecessors, (96), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-12 02:12:26,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:12:26,169 INFO L93 Difference]: Finished difference Result 161 states and 255 transitions. [2023-11-12 02:12:26,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:12:26,172 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 42 [2023-11-12 02:12:26,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:12:26,191 INFO L225 Difference]: With dead ends: 161 [2023-11-12 02:12:26,192 INFO L226 Difference]: Without dead ends: 63 [2023-11-12 02:12:26,195 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:12:26,199 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 33 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:12:26,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 191 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:12:26,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-11-12 02:12:26,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2023-11-12 02:12:26,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 56 states have (on average 1.4642857142857142) internal successors, (82), 56 states have internal predecessors, (82), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-12 02:12:26,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 91 transitions. [2023-11-12 02:12:26,241 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 91 transitions. Word has length 42 [2023-11-12 02:12:26,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:12:26,243 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 91 transitions. [2023-11-12 02:12:26,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-12 02:12:26,244 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 91 transitions. [2023-11-12 02:12:26,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-12 02:12:26,247 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:12:26,247 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:12:26,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 02:12:26,248 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:12:26,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:12:26,249 INFO L85 PathProgramCache]: Analyzing trace with hash -851029466, now seen corresponding path program 1 times [2023-11-12 02:12:26,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:12:26,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134865056] [2023-11-12 02:12:26,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:12:26,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:12:26,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:26,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:12:26,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:26,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-12 02:12:26,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:26,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-12 02:12:26,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:26,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-12 02:12:26,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:26,552 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-12 02:12:26,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:12:26,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134865056] [2023-11-12 02:12:26,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134865056] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:12:26,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:12:26,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:12:26,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733586591] [2023-11-12 02:12:26,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:12:26,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:12:26,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:12:26,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:12:26,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:12:26,558 INFO L87 Difference]: Start difference. First operand 63 states and 91 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-12 02:12:26,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:12:26,627 INFO L93 Difference]: Finished difference Result 96 states and 138 transitions. [2023-11-12 02:12:26,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:12:26,632 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 44 [2023-11-12 02:12:26,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:12:26,637 INFO L225 Difference]: With dead ends: 96 [2023-11-12 02:12:26,637 INFO L226 Difference]: Without dead ends: 63 [2023-11-12 02:12:26,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:12:26,639 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 68 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:12:26,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 265 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:12:26,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-11-12 02:12:26,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2023-11-12 02:12:26,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 56 states have (on average 1.4464285714285714) internal successors, (81), 56 states have internal predecessors, (81), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-12 02:12:26,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 90 transitions. [2023-11-12 02:12:26,662 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 90 transitions. Word has length 44 [2023-11-12 02:12:26,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:12:26,663 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 90 transitions. [2023-11-12 02:12:26,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-12 02:12:26,664 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 90 transitions. [2023-11-12 02:12:26,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-12 02:12:26,669 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:12:26,669 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:12:26,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 02:12:26,670 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:12:26,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:12:26,671 INFO L85 PathProgramCache]: Analyzing trace with hash -1437835480, now seen corresponding path program 1 times [2023-11-12 02:12:26,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:12:26,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725015285] [2023-11-12 02:12:26,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:12:26,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:12:26,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:26,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:12:26,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:26,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-12 02:12:26,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:26,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-12 02:12:26,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:26,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-12 02:12:26,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:26,867 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-12 02:12:26,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:12:26,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725015285] [2023-11-12 02:12:26,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725015285] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:12:26,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136789605] [2023-11-12 02:12:26,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:12:26,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:12:26,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ddd159-0e32-40ae-84b1-2ea903d1b1a2/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:12:26,879 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ddd159-0e32-40ae-84b1-2ea903d1b1a2/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:12:26,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ddd159-0e32-40ae-84b1-2ea903d1b1a2/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:12:26,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:26,998 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-12 02:12:27,014 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:12:27,177 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-12 02:12:27,178 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:12:27,412 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-12 02:12:27,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136789605] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:12:27,412 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:12:27,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 6] total 13 [2023-11-12 02:12:27,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233440970] [2023-11-12 02:12:27,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:12:27,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-12 02:12:27,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:12:27,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-12 02:12:27,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2023-11-12 02:12:27,426 INFO L87 Difference]: Start difference. First operand 63 states and 90 transitions. Second operand has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 11 states have internal predecessors, (62), 4 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) [2023-11-12 02:12:28,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:12:28,007 INFO L93 Difference]: Finished difference Result 243 states and 388 transitions. [2023-11-12 02:12:28,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-12 02:12:28,007 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 11 states have internal predecessors, (62), 4 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) Word has length 44 [2023-11-12 02:12:28,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:12:28,012 INFO L225 Difference]: With dead ends: 243 [2023-11-12 02:12:28,013 INFO L226 Difference]: Without dead ends: 184 [2023-11-12 02:12:28,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=131, Invalid=421, Unknown=0, NotChecked=0, Total=552 [2023-11-12 02:12:28,016 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 289 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 534 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 02:12:28,016 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [289 Valid, 534 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 02:12:28,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2023-11-12 02:12:28,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 121. [2023-11-12 02:12:28,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 108 states have (on average 1.4259259259259258) internal successors, (154), 108 states have internal predecessors, (154), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (17), 8 states have call predecessors, (17), 7 states have call successors, (17) [2023-11-12 02:12:28,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 179 transitions. [2023-11-12 02:12:28,049 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 179 transitions. Word has length 44 [2023-11-12 02:12:28,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:12:28,050 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 179 transitions. [2023-11-12 02:12:28,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 11 states have internal predecessors, (62), 4 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) [2023-11-12 02:12:28,050 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 179 transitions. [2023-11-12 02:12:28,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-12 02:12:28,053 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:12:28,053 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:12:28,060 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ddd159-0e32-40ae-84b1-2ea903d1b1a2/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 02:12:28,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ddd159-0e32-40ae-84b1-2ea903d1b1a2/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:12:28,260 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:12:28,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:12:28,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1197267030, now seen corresponding path program 1 times [2023-11-12 02:12:28,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:12:28,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20010380] [2023-11-12 02:12:28,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:12:28,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:12:28,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:28,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:12:28,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:28,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-12 02:12:28,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:28,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-12 02:12:28,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:28,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-11-12 02:12:28,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:28,355 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-12 02:12:28,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:12:28,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20010380] [2023-11-12 02:12:28,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20010380] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:12:28,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602023549] [2023-11-12 02:12:28,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:12:28,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:12:28,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ddd159-0e32-40ae-84b1-2ea903d1b1a2/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:12:28,359 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ddd159-0e32-40ae-84b1-2ea903d1b1a2/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:12:28,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ddd159-0e32-40ae-84b1-2ea903d1b1a2/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:12:28,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:28,436 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 02:12:28,439 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:12:28,468 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-12 02:12:28,468 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:12:28,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602023549] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:12:28,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:12:28,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-11-12 02:12:28,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662146573] [2023-11-12 02:12:28,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:12:28,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:12:28,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:12:28,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:12:28,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:12:28,472 INFO L87 Difference]: Start difference. First operand 121 states and 179 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-12 02:12:28,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:12:28,540 INFO L93 Difference]: Finished difference Result 247 states and 367 transitions. [2023-11-12 02:12:28,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:12:28,541 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 49 [2023-11-12 02:12:28,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:12:28,543 INFO L225 Difference]: With dead ends: 247 [2023-11-12 02:12:28,544 INFO L226 Difference]: Without dead ends: 137 [2023-11-12 02:12:28,545 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:12:28,546 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 19 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:12:28,547 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 223 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:12:28,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2023-11-12 02:12:28,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2023-11-12 02:12:28,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 122 states have (on average 1.4180327868852458) internal successors, (173), 124 states have internal predecessors, (173), 8 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (22), 8 states have call predecessors, (22), 7 states have call successors, (22) [2023-11-12 02:12:28,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 203 transitions. [2023-11-12 02:12:28,565 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 203 transitions. Word has length 49 [2023-11-12 02:12:28,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:12:28,566 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 203 transitions. [2023-11-12 02:12:28,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-12 02:12:28,567 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 203 transitions. [2023-11-12 02:12:28,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-11-12 02:12:28,569 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:12:28,569 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:12:28,581 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ddd159-0e32-40ae-84b1-2ea903d1b1a2/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 02:12:28,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ddd159-0e32-40ae-84b1-2ea903d1b1a2/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:12:28,776 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:12:28,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:12:28,776 INFO L85 PathProgramCache]: Analyzing trace with hash 928392544, now seen corresponding path program 1 times [2023-11-12 02:12:28,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:12:28,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801965301] [2023-11-12 02:12:28,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:12:28,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:12:28,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:28,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:12:28,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:28,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-12 02:12:28,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:28,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-11-12 02:12:28,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:28,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-12 02:12:28,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:28,888 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-12 02:12:28,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:12:28,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801965301] [2023-11-12 02:12:28,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801965301] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:12:28,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256192445] [2023-11-12 02:12:28,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:12:28,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:12:28,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ddd159-0e32-40ae-84b1-2ea903d1b1a2/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:12:28,891 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ddd159-0e32-40ae-84b1-2ea903d1b1a2/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:12:28,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ddd159-0e32-40ae-84b1-2ea903d1b1a2/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 02:12:28,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:28,966 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-12 02:12:28,969 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:12:29,013 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-12 02:12:29,013 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:12:29,110 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-12 02:12:29,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256192445] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:12:29,111 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:12:29,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-12 02:12:29,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847319939] [2023-11-12 02:12:29,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:12:29,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-12 02:12:29,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:12:29,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-12 02:12:29,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-11-12 02:12:29,114 INFO L87 Difference]: Start difference. First operand 137 states and 203 transitions. Second operand has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 11 states have internal predecessors, (59), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-12 02:12:29,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:12:29,336 INFO L93 Difference]: Finished difference Result 359 states and 561 transitions. [2023-11-12 02:12:29,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-12 02:12:29,337 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 11 states have internal predecessors, (59), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 52 [2023-11-12 02:12:29,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:12:29,340 INFO L225 Difference]: With dead ends: 359 [2023-11-12 02:12:29,340 INFO L226 Difference]: Without dead ends: 239 [2023-11-12 02:12:29,341 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2023-11-12 02:12:29,342 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 150 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:12:29,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 398 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:12:29,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2023-11-12 02:12:29,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 164. [2023-11-12 02:12:29,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 149 states have (on average 1.4429530201342282) internal successors, (215), 151 states have internal predecessors, (215), 8 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (22), 8 states have call predecessors, (22), 7 states have call successors, (22) [2023-11-12 02:12:29,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 245 transitions. [2023-11-12 02:12:29,394 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 245 transitions. Word has length 52 [2023-11-12 02:12:29,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:12:29,395 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 245 transitions. [2023-11-12 02:12:29,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 11 states have internal predecessors, (59), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-12 02:12:29,395 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 245 transitions. [2023-11-12 02:12:29,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-12 02:12:29,402 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:12:29,402 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:12:29,420 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ddd159-0e32-40ae-84b1-2ea903d1b1a2/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 02:12:29,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ddd159-0e32-40ae-84b1-2ea903d1b1a2/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:12:29,608 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:12:29,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:12:29,608 INFO L85 PathProgramCache]: Analyzing trace with hash -974040176, now seen corresponding path program 1 times [2023-11-12 02:12:29,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:12:29,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884871968] [2023-11-12 02:12:29,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:12:29,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:12:29,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:29,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:12:29,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:29,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-12 02:12:29,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:29,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-11-12 02:12:29,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:29,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-12 02:12:29,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:29,682 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-12 02:12:29,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:12:29,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884871968] [2023-11-12 02:12:29,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884871968] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:12:29,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591536355] [2023-11-12 02:12:29,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:12:29,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:12:29,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ddd159-0e32-40ae-84b1-2ea903d1b1a2/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:12:29,685 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ddd159-0e32-40ae-84b1-2ea903d1b1a2/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:12:29,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ddd159-0e32-40ae-84b1-2ea903d1b1a2/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 02:12:29,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:29,762 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 02:12:29,765 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:12:29,779 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-12 02:12:29,783 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:12:29,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591536355] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:12:29,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:12:29,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 3 [2023-11-12 02:12:29,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447616437] [2023-11-12 02:12:29,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:12:29,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:12:29,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:12:29,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:12:29,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:12:29,786 INFO L87 Difference]: Start difference. First operand 164 states and 245 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-12 02:12:29,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:12:29,837 INFO L93 Difference]: Finished difference Result 308 states and 480 transitions. [2023-11-12 02:12:29,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:12:29,838 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 54 [2023-11-12 02:12:29,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:12:29,840 INFO L225 Difference]: With dead ends: 308 [2023-11-12 02:12:29,840 INFO L226 Difference]: Without dead ends: 171 [2023-11-12 02:12:29,841 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:12:29,842 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 9 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:12:29,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 161 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:12:29,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2023-11-12 02:12:29,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 164. [2023-11-12 02:12:29,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 149 states have (on average 1.4228187919463087) internal successors, (212), 151 states have internal predecessors, (212), 8 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (22), 8 states have call predecessors, (22), 7 states have call successors, (22) [2023-11-12 02:12:29,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 242 transitions. [2023-11-12 02:12:29,861 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 242 transitions. Word has length 54 [2023-11-12 02:12:29,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:12:29,861 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 242 transitions. [2023-11-12 02:12:29,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-12 02:12:29,861 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 242 transitions. [2023-11-12 02:12:29,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-12 02:12:29,863 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:12:29,863 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:12:29,874 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ddd159-0e32-40ae-84b1-2ea903d1b1a2/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 02:12:30,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ddd159-0e32-40ae-84b1-2ea903d1b1a2/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:12:30,069 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:12:30,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:12:30,070 INFO L85 PathProgramCache]: Analyzing trace with hash -866926084, now seen corresponding path program 1 times [2023-11-12 02:12:30,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:12:30,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568741644] [2023-11-12 02:12:30,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:12:30,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:12:30,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:30,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:12:30,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:30,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-12 02:12:30,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:30,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-11-12 02:12:30,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:30,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-11-12 02:12:30,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:30,216 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-12 02:12:30,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:12:30,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568741644] [2023-11-12 02:12:30,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568741644] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:12:30,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831834132] [2023-11-12 02:12:30,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:12:30,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:12:30,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ddd159-0e32-40ae-84b1-2ea903d1b1a2/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:12:30,222 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ddd159-0e32-40ae-84b1-2ea903d1b1a2/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:12:30,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ddd159-0e32-40ae-84b1-2ea903d1b1a2/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 02:12:30,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:30,307 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-12 02:12:30,310 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:12:30,372 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-12 02:12:30,372 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:12:30,462 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-12 02:12:30,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831834132] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-12 02:12:30,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:12:30,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4, 7] total 12 [2023-11-12 02:12:30,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060002457] [2023-11-12 02:12:30,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:12:30,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:12:30,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:12:30,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:12:30,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2023-11-12 02:12:30,466 INFO L87 Difference]: Start difference. First operand 164 states and 242 transitions. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-12 02:12:30,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:12:30,536 INFO L93 Difference]: Finished difference Result 181 states and 260 transitions. [2023-11-12 02:12:30,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:12:30,537 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 55 [2023-11-12 02:12:30,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:12:30,539 INFO L225 Difference]: With dead ends: 181 [2023-11-12 02:12:30,539 INFO L226 Difference]: Without dead ends: 175 [2023-11-12 02:12:30,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2023-11-12 02:12:30,540 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 10 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:12:30,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 333 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:12:30,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2023-11-12 02:12:30,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 173. [2023-11-12 02:12:30,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 158 states have (on average 1.4050632911392404) internal successors, (222), 160 states have internal predecessors, (222), 8 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (22), 8 states have call predecessors, (22), 7 states have call successors, (22) [2023-11-12 02:12:30,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 252 transitions. [2023-11-12 02:12:30,557 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 252 transitions. Word has length 55 [2023-11-12 02:12:30,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:12:30,558 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 252 transitions. [2023-11-12 02:12:30,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-12 02:12:30,558 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 252 transitions. [2023-11-12 02:12:30,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-12 02:12:30,560 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:12:30,560 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:12:30,570 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ddd159-0e32-40ae-84b1-2ea903d1b1a2/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 02:12:30,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ddd159-0e32-40ae-84b1-2ea903d1b1a2/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:12:30,771 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:12:30,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:12:30,771 INFO L85 PathProgramCache]: Analyzing trace with hash -809667782, now seen corresponding path program 1 times [2023-11-12 02:12:30,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:12:30,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902964784] [2023-11-12 02:12:30,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:12:30,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:12:30,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:30,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:12:30,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:30,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-12 02:12:30,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:30,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-11-12 02:12:30,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:30,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-11-12 02:12:30,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:30,896 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-12 02:12:30,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:12:30,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902964784] [2023-11-12 02:12:30,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902964784] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:12:30,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:12:30,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 02:12:30,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488345420] [2023-11-12 02:12:30,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:12:30,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 02:12:30,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:12:30,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 02:12:30,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:12:30,899 INFO L87 Difference]: Start difference. First operand 173 states and 252 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-12 02:12:30,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:12:30,953 INFO L93 Difference]: Finished difference Result 179 states and 257 transitions. [2023-11-12 02:12:30,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:12:30,954 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 55 [2023-11-12 02:12:30,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:12:30,959 INFO L225 Difference]: With dead ends: 179 [2023-11-12 02:12:30,959 INFO L226 Difference]: Without dead ends: 168 [2023-11-12 02:12:30,960 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:12:30,961 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 2 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:12:30,962 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 433 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:12:30,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2023-11-12 02:12:30,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2023-11-12 02:12:30,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 153 states have (on average 1.392156862745098) internal successors, (213), 155 states have internal predecessors, (213), 8 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (22), 8 states have call predecessors, (22), 7 states have call successors, (22) [2023-11-12 02:12:30,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 243 transitions. [2023-11-12 02:12:30,978 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 243 transitions. Word has length 55 [2023-11-12 02:12:30,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:12:30,979 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 243 transitions. [2023-11-12 02:12:30,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-12 02:12:30,979 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 243 transitions. [2023-11-12 02:12:30,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-11-12 02:12:30,983 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:12:30,983 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:12:30,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-12 02:12:30,983 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:12:30,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:12:30,986 INFO L85 PathProgramCache]: Analyzing trace with hash -735780360, now seen corresponding path program 1 times [2023-11-12 02:12:30,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:12:30,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384519493] [2023-11-12 02:12:30,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:12:30,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:12:31,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:31,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:12:31,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:31,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-12 02:12:31,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:31,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-11-12 02:12:31,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:31,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-11-12 02:12:31,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:31,161 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-12 02:12:31,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:12:31,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384519493] [2023-11-12 02:12:31,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384519493] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:12:31,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995174384] [2023-11-12 02:12:31,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:12:31,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:12:31,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ddd159-0e32-40ae-84b1-2ea903d1b1a2/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:12:31,166 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ddd159-0e32-40ae-84b1-2ea903d1b1a2/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:12:31,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ddd159-0e32-40ae-84b1-2ea903d1b1a2/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 02:12:31,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:31,249 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-12 02:12:31,251 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:12:31,367 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-12 02:12:31,367 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:12:31,546 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-12 02:12:31,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995174384] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:12:31,546 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:12:31,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 10, 8] total 18 [2023-11-12 02:12:31,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208891048] [2023-11-12 02:12:31,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:12:31,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-12 02:12:31,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:12:31,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-12 02:12:31,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2023-11-12 02:12:31,548 INFO L87 Difference]: Start difference. First operand 168 states and 243 transitions. Second operand has 18 states, 18 states have (on average 4.333333333333333) internal successors, (78), 16 states have internal predecessors, (78), 4 states have call successors, (8), 2 states have call predecessors, (8), 5 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) [2023-11-12 02:12:32,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:12:32,103 INFO L93 Difference]: Finished difference Result 288 states and 421 transitions. [2023-11-12 02:12:32,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-12 02:12:32,104 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.333333333333333) internal successors, (78), 16 states have internal predecessors, (78), 4 states have call successors, (8), 2 states have call predecessors, (8), 5 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) Word has length 60 [2023-11-12 02:12:32,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:12:32,105 INFO L225 Difference]: With dead ends: 288 [2023-11-12 02:12:32,105 INFO L226 Difference]: Without dead ends: 115 [2023-11-12 02:12:32,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=131, Invalid=739, Unknown=0, NotChecked=0, Total=870 [2023-11-12 02:12:32,107 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 56 mSDsluCounter, 781 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 851 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 02:12:32,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 851 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 02:12:32,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2023-11-12 02:12:32,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 99. [2023-11-12 02:12:32,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 88 states have (on average 1.3522727272727273) internal successors, (119), 90 states have internal predecessors, (119), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2023-11-12 02:12:32,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 134 transitions. [2023-11-12 02:12:32,118 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 134 transitions. Word has length 60 [2023-11-12 02:12:32,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:12:32,118 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 134 transitions. [2023-11-12 02:12:32,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.333333333333333) internal successors, (78), 16 states have internal predecessors, (78), 4 states have call successors, (8), 2 states have call predecessors, (8), 5 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) [2023-11-12 02:12:32,119 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 134 transitions. [2023-11-12 02:12:32,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-11-12 02:12:32,120 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:12:32,120 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:12:32,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ddd159-0e32-40ae-84b1-2ea903d1b1a2/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-12 02:12:32,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ddd159-0e32-40ae-84b1-2ea903d1b1a2/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:12:32,326 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:12:32,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:12:32,327 INFO L85 PathProgramCache]: Analyzing trace with hash 768963947, now seen corresponding path program 1 times [2023-11-12 02:12:32,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:12:32,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011114932] [2023-11-12 02:12:32,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:12:32,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:12:32,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:32,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:12:32,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:32,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-12 02:12:32,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:32,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-11-12 02:12:32,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:32,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-11-12 02:12:32,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:32,555 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-12 02:12:32,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:12:32,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011114932] [2023-11-12 02:12:32,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011114932] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:12:32,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:12:32,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-12 02:12:32,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383352429] [2023-11-12 02:12:32,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:12:32,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:12:32,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:12:32,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:12:32,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:12:32,558 INFO L87 Difference]: Start difference. First operand 99 states and 134 transitions. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 6 states have internal predecessors, (47), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-12 02:12:32,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:12:32,615 INFO L93 Difference]: Finished difference Result 136 states and 181 transitions. [2023-11-12 02:12:32,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 02:12:32,616 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 6 states have internal predecessors, (47), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 64 [2023-11-12 02:12:32,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:12:32,617 INFO L225 Difference]: With dead ends: 136 [2023-11-12 02:12:32,617 INFO L226 Difference]: Without dead ends: 96 [2023-11-12 02:12:32,617 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-12 02:12:32,618 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 5 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 488 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:12:32,618 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 488 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:12:32,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2023-11-12 02:12:32,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2023-11-12 02:12:32,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 86 states have (on average 1.313953488372093) internal successors, (113), 87 states have internal predecessors, (113), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-12 02:12:32,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 125 transitions. [2023-11-12 02:12:32,628 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 125 transitions. Word has length 64 [2023-11-12 02:12:32,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:12:32,628 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 125 transitions. [2023-11-12 02:12:32,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 6 states have internal predecessors, (47), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-12 02:12:32,628 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 125 transitions. [2023-11-12 02:12:32,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-12 02:12:32,629 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:12:32,629 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:12:32,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-12 02:12:32,630 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:12:32,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:12:32,630 INFO L85 PathProgramCache]: Analyzing trace with hash -955640422, now seen corresponding path program 2 times [2023-11-12 02:12:32,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:12:32,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797356281] [2023-11-12 02:12:32,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:12:32,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:12:32,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:32,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:12:32,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:32,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-12 02:12:32,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:32,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-11-12 02:12:32,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:32,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-11-12 02:12:32,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:32,967 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-12 02:12:32,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:12:32,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797356281] [2023-11-12 02:12:32,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797356281] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:12:32,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896580357] [2023-11-12 02:12:32,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:12:32,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:12:32,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ddd159-0e32-40ae-84b1-2ea903d1b1a2/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:12:32,969 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ddd159-0e32-40ae-84b1-2ea903d1b1a2/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:12:32,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ddd159-0e32-40ae-84b1-2ea903d1b1a2/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 02:12:33,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-12 02:12:33,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:12:33,080 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-12 02:12:33,083 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:12:33,179 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-12 02:12:33,179 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:12:33,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896580357] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:12:33,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:12:33,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 15 [2023-11-12 02:12:33,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994699324] [2023-11-12 02:12:33,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:12:33,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-12 02:12:33,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:12:33,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-12 02:12:33,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2023-11-12 02:12:33,181 INFO L87 Difference]: Start difference. First operand 96 states and 125 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-12 02:12:33,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:12:33,350 INFO L93 Difference]: Finished difference Result 179 states and 238 transitions. [2023-11-12 02:12:33,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 02:12:33,351 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 68 [2023-11-12 02:12:33,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:12:33,352 INFO L225 Difference]: With dead ends: 179 [2023-11-12 02:12:33,352 INFO L226 Difference]: Without dead ends: 152 [2023-11-12 02:12:33,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2023-11-12 02:12:33,354 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 132 mSDsluCounter, 636 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 744 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:12:33,354 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 744 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:12:33,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2023-11-12 02:12:33,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 107. [2023-11-12 02:12:33,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 96 states have (on average 1.2916666666666667) internal successors, (124), 97 states have internal predecessors, (124), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-11-12 02:12:33,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 138 transitions. [2023-11-12 02:12:33,364 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 138 transitions. Word has length 68 [2023-11-12 02:12:33,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:12:33,365 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 138 transitions. [2023-11-12 02:12:33,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-12 02:12:33,365 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 138 transitions. [2023-11-12 02:12:33,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-12 02:12:33,366 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:12:33,366 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:12:33,372 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ddd159-0e32-40ae-84b1-2ea903d1b1a2/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-12 02:12:33,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ddd159-0e32-40ae-84b1-2ea903d1b1a2/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:12:33,573 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:12:33,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:12:33,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1750978972, now seen corresponding path program 1 times [2023-11-12 02:12:33,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:12:33,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218884547] [2023-11-12 02:12:33,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:12:33,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:12:33,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:33,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:12:33,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:33,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-12 02:12:33,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:33,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-11-12 02:12:33,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:33,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-11-12 02:12:33,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:33,921 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-12 02:12:33,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:12:33,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218884547] [2023-11-12 02:12:33,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218884547] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:12:33,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727383041] [2023-11-12 02:12:33,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:12:33,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:12:33,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ddd159-0e32-40ae-84b1-2ea903d1b1a2/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:12:33,923 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ddd159-0e32-40ae-84b1-2ea903d1b1a2/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:12:33,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ddd159-0e32-40ae-84b1-2ea903d1b1a2/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-12 02:12:34,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:34,004 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-12 02:12:34,007 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:12:34,175 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-12 02:12:34,175 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:12:34,416 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-12 02:12:34,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727383041] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:12:34,417 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:12:34,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2023-11-12 02:12:34,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333324090] [2023-11-12 02:12:34,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:12:34,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-12 02:12:34,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:12:34,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-12 02:12:34,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2023-11-12 02:12:34,419 INFO L87 Difference]: Start difference. First operand 107 states and 138 transitions. Second operand has 23 states, 23 states have (on average 3.608695652173913) internal successors, (83), 19 states have internal predecessors, (83), 6 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (10), 9 states have call predecessors, (10), 5 states have call successors, (10) [2023-11-12 02:12:34,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:12:34,603 INFO L93 Difference]: Finished difference Result 153 states and 198 transitions. [2023-11-12 02:12:34,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-12 02:12:34,604 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.608695652173913) internal successors, (83), 19 states have internal predecessors, (83), 6 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (10), 9 states have call predecessors, (10), 5 states have call successors, (10) Word has length 68 [2023-11-12 02:12:34,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:12:34,605 INFO L225 Difference]: With dead ends: 153 [2023-11-12 02:12:34,605 INFO L226 Difference]: Without dead ends: 107 [2023-11-12 02:12:34,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 133 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2023-11-12 02:12:34,607 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 49 mSDsluCounter, 1147 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 1228 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:12:34,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 1228 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:12:34,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2023-11-12 02:12:34,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2023-11-12 02:12:34,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 96 states have (on average 1.2916666666666667) internal successors, (124), 97 states have internal predecessors, (124), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-11-12 02:12:34,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 137 transitions. [2023-11-12 02:12:34,616 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 137 transitions. Word has length 68 [2023-11-12 02:12:34,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:12:34,616 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 137 transitions. [2023-11-12 02:12:34,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.608695652173913) internal successors, (83), 19 states have internal predecessors, (83), 6 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (10), 9 states have call predecessors, (10), 5 states have call successors, (10) [2023-11-12 02:12:34,617 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 137 transitions. [2023-11-12 02:12:34,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-11-12 02:12:34,618 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:12:34,618 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:12:34,629 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ddd159-0e32-40ae-84b1-2ea903d1b1a2/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-12 02:12:34,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ddd159-0e32-40ae-84b1-2ea903d1b1a2/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:12:34,819 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:12:34,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:12:34,819 INFO L85 PathProgramCache]: Analyzing trace with hash 410900049, now seen corresponding path program 1 times [2023-11-12 02:12:34,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:12:34,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154210754] [2023-11-12 02:12:34,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:12:34,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:12:34,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:34,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:12:34,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:34,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-12 02:12:34,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:34,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-11-12 02:12:34,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:34,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-11-12 02:12:34,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:34,913 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-12 02:12:34,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:12:34,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154210754] [2023-11-12 02:12:34,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154210754] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:12:34,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609952051] [2023-11-12 02:12:34,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:12:34,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:12:34,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ddd159-0e32-40ae-84b1-2ea903d1b1a2/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:12:34,922 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ddd159-0e32-40ae-84b1-2ea903d1b1a2/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:12:34,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ddd159-0e32-40ae-84b1-2ea903d1b1a2/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-12 02:12:35,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:35,021 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 02:12:35,023 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:12:35,040 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-12 02:12:35,040 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:12:35,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609952051] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:12:35,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:12:35,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 3 [2023-11-12 02:12:35,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685617168] [2023-11-12 02:12:35,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:12:35,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:12:35,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:12:35,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:12:35,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:12:35,043 INFO L87 Difference]: Start difference. First operand 107 states and 137 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-12 02:12:35,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:12:35,086 INFO L93 Difference]: Finished difference Result 203 states and 260 transitions. [2023-11-12 02:12:35,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:12:35,087 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 72 [2023-11-12 02:12:35,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:12:35,088 INFO L225 Difference]: With dead ends: 203 [2023-11-12 02:12:35,088 INFO L226 Difference]: Without dead ends: 107 [2023-11-12 02:12:35,089 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:12:35,090 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 6 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:12:35,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 147 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:12:35,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2023-11-12 02:12:35,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2023-11-12 02:12:35,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 96 states have (on average 1.28125) internal successors, (123), 97 states have internal predecessors, (123), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-11-12 02:12:35,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 136 transitions. [2023-11-12 02:12:35,101 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 136 transitions. Word has length 72 [2023-11-12 02:12:35,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:12:35,101 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 136 transitions. [2023-11-12 02:12:35,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-12 02:12:35,102 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 136 transitions. [2023-11-12 02:12:35,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-11-12 02:12:35,103 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:12:35,103 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:12:35,112 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ddd159-0e32-40ae-84b1-2ea903d1b1a2/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-12 02:12:35,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ddd159-0e32-40ae-84b1-2ea903d1b1a2/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-12 02:12:35,309 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:12:35,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:12:35,310 INFO L85 PathProgramCache]: Analyzing trace with hash -960907249, now seen corresponding path program 1 times [2023-11-12 02:12:35,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:12:35,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621216121] [2023-11-12 02:12:35,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:12:35,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:12:35,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:35,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:12:35,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:35,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-12 02:12:35,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:35,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-11-12 02:12:35,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:35,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-11-12 02:12:35,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:35,506 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-12 02:12:35,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:12:35,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621216121] [2023-11-12 02:12:35,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621216121] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:12:35,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025420213] [2023-11-12 02:12:35,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:12:35,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:12:35,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ddd159-0e32-40ae-84b1-2ea903d1b1a2/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:12:35,508 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ddd159-0e32-40ae-84b1-2ea903d1b1a2/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:12:35,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ddd159-0e32-40ae-84b1-2ea903d1b1a2/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-12 02:12:35,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:35,593 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-12 02:12:35,595 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:12:35,804 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-12 02:12:35,804 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:12:35,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025420213] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:12:35,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:12:35,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [5] total 15 [2023-11-12 02:12:35,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466177013] [2023-11-12 02:12:35,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:12:35,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-12 02:12:35,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:12:35,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-12 02:12:35,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2023-11-12 02:12:35,806 INFO L87 Difference]: Start difference. First operand 107 states and 136 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-12 02:12:36,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:12:36,070 INFO L93 Difference]: Finished difference Result 166 states and 213 transitions. [2023-11-12 02:12:36,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-12 02:12:36,071 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 72 [2023-11-12 02:12:36,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:12:36,072 INFO L225 Difference]: With dead ends: 166 [2023-11-12 02:12:36,072 INFO L226 Difference]: Without dead ends: 131 [2023-11-12 02:12:36,072 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2023-11-12 02:12:36,073 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 130 mSDsluCounter, 712 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 791 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:12:36,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 791 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:12:36,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2023-11-12 02:12:36,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 107. [2023-11-12 02:12:36,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 96 states have (on average 1.2708333333333333) internal successors, (122), 97 states have internal predecessors, (122), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-11-12 02:12:36,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 135 transitions. [2023-11-12 02:12:36,083 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 135 transitions. Word has length 72 [2023-11-12 02:12:36,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:12:36,083 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 135 transitions. [2023-11-12 02:12:36,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-12 02:12:36,083 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 135 transitions. [2023-11-12 02:12:36,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-11-12 02:12:36,084 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:12:36,085 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:12:36,096 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ddd159-0e32-40ae-84b1-2ea903d1b1a2/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-12 02:12:36,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ddd159-0e32-40ae-84b1-2ea903d1b1a2/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-12 02:12:36,295 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:12:36,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:12:36,295 INFO L85 PathProgramCache]: Analyzing trace with hash 250988180, now seen corresponding path program 1 times [2023-11-12 02:12:36,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:12:36,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591242690] [2023-11-12 02:12:36,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:12:36,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:12:36,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:36,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:12:36,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:36,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-12 02:12:36,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:36,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-11-12 02:12:36,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:36,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-11-12 02:12:36,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:36,512 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-12 02:12:36,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:12:36,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591242690] [2023-11-12 02:12:36,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591242690] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:12:36,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587683428] [2023-11-12 02:12:36,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:12:36,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:12:36,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ddd159-0e32-40ae-84b1-2ea903d1b1a2/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:12:36,516 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ddd159-0e32-40ae-84b1-2ea903d1b1a2/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:12:36,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ddd159-0e32-40ae-84b1-2ea903d1b1a2/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-12 02:12:36,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:12:36,602 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-12 02:12:36,605 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:12:36,715 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-12 02:12:36,715 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:12:37,024 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-12 02:12:37,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587683428] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:12:37,024 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:12:37,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 10, 12] total 20 [2023-11-12 02:12:37,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230256894] [2023-11-12 02:12:37,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:12:37,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-12 02:12:37,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:12:37,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-12 02:12:37,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2023-11-12 02:12:37,026 INFO L87 Difference]: Start difference. First operand 107 states and 135 transitions. Second operand has 20 states, 20 states have (on average 4.1) internal successors, (82), 17 states have internal predecessors, (82), 5 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (12), 8 states have call predecessors, (12), 5 states have call successors, (12) [2023-11-12 02:12:37,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:12:37,597 INFO L93 Difference]: Finished difference Result 191 states and 240 transitions. [2023-11-12 02:12:37,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-12 02:12:37,598 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.1) internal successors, (82), 17 states have internal predecessors, (82), 5 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (12), 8 states have call predecessors, (12), 5 states have call successors, (12) Word has length 73 [2023-11-12 02:12:37,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:12:37,598 INFO L225 Difference]: With dead ends: 191 [2023-11-12 02:12:37,598 INFO L226 Difference]: Without dead ends: 0 [2023-11-12 02:12:37,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 138 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=201, Invalid=989, Unknown=0, NotChecked=0, Total=1190 [2023-11-12 02:12:37,600 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 147 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 02:12:37,600 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 211 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 02:12:37,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-11-12 02:12:37,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-11-12 02:12:37,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:12:37,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-11-12 02:12:37,601 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 73 [2023-11-12 02:12:37,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:12:37,602 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-12 02:12:37,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.1) internal successors, (82), 17 states have internal predecessors, (82), 5 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (12), 8 states have call predecessors, (12), 5 states have call successors, (12) [2023-11-12 02:12:37,602 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-11-12 02:12:37,602 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-11-12 02:12:37,605 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-11-12 02:12:37,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ddd159-0e32-40ae-84b1-2ea903d1b1a2/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-12 02:12:37,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ddd159-0e32-40ae-84b1-2ea903d1b1a2/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-12 02:12:37,816 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-11-12 02:12:38,305 INFO L899 garLoopResultBuilder]: For program point L77(line 77) no Hoare annotation was computed. [2023-11-12 02:12:38,305 INFO L899 garLoopResultBuilder]: For program point L77-2(line 77) no Hoare annotation was computed. [2023-11-12 02:12:38,306 INFO L899 garLoopResultBuilder]: For program point L77-4(line 77) no Hoare annotation was computed. [2023-11-12 02:12:38,306 INFO L895 garLoopResultBuilder]: At program point L57-2(lines 57 72) the Hoare annotation is: (and (<= |base2flt_#in~e| base2flt_~e) (< 0 (mod |base2flt_#in~m| 4294967296)) (not (= |base2flt_#in~m| 1))) [2023-11-12 02:12:38,306 INFO L899 garLoopResultBuilder]: For program point $Ultimate##27(line 76) no Hoare annotation was computed. [2023-11-12 02:12:38,306 INFO L899 garLoopResultBuilder]: For program point L29(lines 29 34) no Hoare annotation was computed. [2023-11-12 02:12:38,306 INFO L899 garLoopResultBuilder]: For program point L58(lines 57 72) no Hoare annotation was computed. [2023-11-12 02:12:38,306 INFO L899 garLoopResultBuilder]: For program point L79(lines 28 81) no Hoare annotation was computed. [2023-11-12 02:12:38,306 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 24 82) the Hoare annotation is: true [2023-11-12 02:12:38,306 INFO L899 garLoopResultBuilder]: For program point L38(lines 37 52) no Hoare annotation was computed. [2023-11-12 02:12:38,307 INFO L899 garLoopResultBuilder]: For program point base2fltFINAL(lines 24 82) no Hoare annotation was computed. [2023-11-12 02:12:38,307 INFO L899 garLoopResultBuilder]: For program point L59(lines 57 72) no Hoare annotation was computed. [2023-11-12 02:12:38,307 INFO L899 garLoopResultBuilder]: For program point base2fltEXIT(lines 24 82) no Hoare annotation was computed. [2023-11-12 02:12:38,307 INFO L899 garLoopResultBuilder]: For program point L47(lines 47 51) no Hoare annotation was computed. [2023-11-12 02:12:38,307 INFO L895 garLoopResultBuilder]: At program point L47-1(lines 37 52) the Hoare annotation is: (and (let ((.cse0 (<= base2flt_~m (+ 16777215 (* (div base2flt_~m 4294967296) 4294967296))))) (or (and .cse0 (<= base2flt_~m 33554430) (<= 0 base2flt_~m)) (and (= base2flt_~m |base2flt_#in~m|) .cse0 (<= |base2flt_#in~e| base2flt_~e) (or (= base2flt_~e |base2flt_#in~e|) (= base2flt_~e 0))))) (< 0 (mod |base2flt_#in~m| 4294967296))) [2023-11-12 02:12:38,307 INFO L899 garLoopResultBuilder]: For program point L76-1(line 76) no Hoare annotation was computed. [2023-11-12 02:12:38,307 INFO L899 garLoopResultBuilder]: For program point L76-3(line 76) no Hoare annotation was computed. [2023-11-12 02:12:38,307 INFO L899 garLoopResultBuilder]: For program point L35(lines 35 75) no Hoare annotation was computed. [2023-11-12 02:12:38,307 INFO L899 garLoopResultBuilder]: For program point L176(line 176) no Hoare annotation was computed. [2023-11-12 02:12:38,307 INFO L899 garLoopResultBuilder]: For program point L176-2(line 176) no Hoare annotation was computed. [2023-11-12 02:12:38,308 INFO L899 garLoopResultBuilder]: For program point L176-4(line 176) no Hoare annotation was computed. [2023-11-12 02:12:38,308 INFO L899 garLoopResultBuilder]: For program point main_returnLabel#1(lines 220 276) no Hoare annotation was computed. [2023-11-12 02:12:38,308 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2023-11-12 02:12:38,308 INFO L899 garLoopResultBuilder]: For program point L185(lines 185 190) no Hoare annotation was computed. [2023-11-12 02:12:38,308 INFO L899 garLoopResultBuilder]: For program point L243(lines 243 252) no Hoare annotation was computed. [2023-11-12 02:12:38,308 INFO L899 garLoopResultBuilder]: For program point L243-2(lines 243 252) no Hoare annotation was computed. [2023-11-12 02:12:38,308 INFO L899 garLoopResultBuilder]: For program point L260(lines 260 264) no Hoare annotation was computed. [2023-11-12 02:12:38,308 INFO L899 garLoopResultBuilder]: For program point L194(lines 194 211) no Hoare annotation was computed. [2023-11-12 02:12:38,308 INFO L899 garLoopResultBuilder]: For program point L260-2(lines 260 264) no Hoare annotation was computed. [2023-11-12 02:12:38,308 INFO L899 garLoopResultBuilder]: For program point L194-2(lines 194 211) no Hoare annotation was computed. [2023-11-12 02:12:38,308 INFO L899 garLoopResultBuilder]: For program point mulflt_returnLabel#1(lines 147 219) no Hoare annotation was computed. [2023-11-12 02:12:38,308 INFO L899 garLoopResultBuilder]: For program point L203(lines 203 208) no Hoare annotation was computed. [2023-11-12 02:12:38,309 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line -1) no Hoare annotation was computed. [2023-11-12 02:12:38,309 INFO L899 garLoopResultBuilder]: For program point L195(lines 195 200) no Hoare annotation was computed. [2023-11-12 02:12:38,310 INFO L899 garLoopResultBuilder]: For program point L179(lines 179 184) no Hoare annotation was computed. [2023-11-12 02:12:38,310 INFO L899 garLoopResultBuilder]: For program point L246(lines 246 250) no Hoare annotation was computed. [2023-11-12 02:12:38,311 INFO L899 garLoopResultBuilder]: For program point L213(line 213) no Hoare annotation was computed. [2023-11-12 02:12:38,311 INFO L899 garLoopResultBuilder]: For program point L246-2(lines 246 250) no Hoare annotation was computed. [2023-11-12 02:12:38,311 INFO L899 garLoopResultBuilder]: For program point L213-2(line 213) no Hoare annotation was computed. [2023-11-12 02:12:38,311 INFO L899 garLoopResultBuilder]: For program point L213-4(line 213) no Hoare annotation was computed. [2023-11-12 02:12:38,311 INFO L902 garLoopResultBuilder]: At program point L238(line 238) the Hoare annotation is: true [2023-11-12 02:12:38,311 INFO L899 garLoopResultBuilder]: For program point L238-1(line 238) no Hoare annotation was computed. [2023-11-12 02:12:38,312 INFO L899 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2023-11-12 02:12:38,312 INFO L899 garLoopResultBuilder]: For program point L214(line 214) no Hoare annotation was computed. [2023-11-12 02:12:38,312 INFO L899 garLoopResultBuilder]: For program point L214-2(line 214) no Hoare annotation was computed. [2023-11-12 02:12:38,312 INFO L899 garLoopResultBuilder]: For program point L214-4(line 214) no Hoare annotation was computed. [2023-11-12 02:12:38,312 INFO L895 garLoopResultBuilder]: At program point L239(line 239) the Hoare annotation is: (= |ULTIMATE.start_main_~zero~0#1| 0) [2023-11-12 02:12:38,312 INFO L899 garLoopResultBuilder]: For program point L239-1(line 239) no Hoare annotation was computed. [2023-11-12 02:12:38,312 INFO L899 garLoopResultBuilder]: For program point L173(line 173) no Hoare annotation was computed. [2023-11-12 02:12:38,315 INFO L899 garLoopResultBuilder]: For program point L173-2(line 173) no Hoare annotation was computed. [2023-11-12 02:12:38,315 INFO L899 garLoopResultBuilder]: For program point L173-4(line 173) no Hoare annotation was computed. [2023-11-12 02:12:38,315 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-11-12 02:12:38,315 INFO L899 garLoopResultBuilder]: For program point L256(lines 256 272) no Hoare annotation was computed. [2023-11-12 02:12:38,316 INFO L899 garLoopResultBuilder]: For program point L256-1(lines 256 272) no Hoare annotation was computed. [2023-11-12 02:12:38,316 INFO L895 garLoopResultBuilder]: At program point L240(line 240) the Hoare annotation is: (= |ULTIMATE.start_main_~zero~0#1| 0) [2023-11-12 02:12:38,316 INFO L899 garLoopResultBuilder]: For program point L240-1(line 240) no Hoare annotation was computed. [2023-11-12 02:12:38,316 INFO L899 garLoopResultBuilder]: For program point L257(lines 257 266) no Hoare annotation was computed. [2023-11-12 02:12:38,316 INFO L895 garLoopResultBuilder]: At program point L257-2(lines 257 266) the Hoare annotation is: (and (= 0 |ULTIMATE.start_main_~tmp___1~0#1|) (= 0 |ULTIMATE.start_main_~tmp___0~0#1|)) [2023-11-12 02:12:38,317 INFO L899 garLoopResultBuilder]: For program point L158(lines 158 164) no Hoare annotation was computed. [2023-11-12 02:12:38,317 INFO L899 garLoopResultBuilder]: For program point L158-2(lines 157 218) no Hoare annotation was computed. [2023-11-12 02:12:38,317 INFO L899 garLoopResultBuilder]: For program point L216(lines 157 218) no Hoare annotation was computed. [2023-11-12 02:12:38,317 INFO L895 garLoopResultBuilder]: At program point L241(line 241) the Hoare annotation is: (or (= |ULTIMATE.start_main_~zero~0#1| 0) (and (<= (mod |ULTIMATE.start_main_~zero~0#1| 4294967296) 0) (= |ULTIMATE.start_main_~a~0#1| 0))) [2023-11-12 02:12:38,317 INFO L899 garLoopResultBuilder]: For program point L241-1(line 241) no Hoare annotation was computed. [2023-11-12 02:12:38,317 INFO L899 garLoopResultBuilder]: For program point L17(line 17) no Hoare annotation was computed. [2023-11-12 02:12:38,318 INFO L899 garLoopResultBuilder]: For program point L16(lines 16 18) no Hoare annotation was computed. [2023-11-12 02:12:38,318 INFO L899 garLoopResultBuilder]: For program point L16-2(lines 15 20) no Hoare annotation was computed. [2023-11-12 02:12:38,318 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 15 20) no Hoare annotation was computed. [2023-11-12 02:12:38,318 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 15 20) the Hoare annotation is: true [2023-11-12 02:12:38,318 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2023-11-12 02:12:38,321 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:12:38,324 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-11-12 02:12:38,342 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.11 02:12:38 BoogieIcfgContainer [2023-11-12 02:12:38,342 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-12 02:12:38,342 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-12 02:12:38,342 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-12 02:12:38,343 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-12 02:12:38,343 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:12:25" (3/4) ... [2023-11-12 02:12:38,345 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-11-12 02:12:38,350 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure base2flt [2023-11-12 02:12:38,350 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2023-11-12 02:12:38,357 INFO L944 BoogieBacktranslator]: Reduced CFG by removing 21 nodes and edges [2023-11-12 02:12:38,358 INFO L944 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2023-11-12 02:12:38,358 INFO L944 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2023-11-12 02:12:38,359 INFO L944 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-11-12 02:12:38,391 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (((((m <= (16777215 + ((m / 4294967296) * 4294967296))) && (m <= 33554430)) && (0 <= m)) || ((((m == \old(m)) && (m <= (16777215 + ((m / 4294967296) * 4294967296)))) && (\old(e) <= e)) && ((e == \old(e)) || (e == 0)))) && (0 < (\old(m) % 4294967296))) [2023-11-12 02:12:38,391 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (((\old(e) <= e) && (0 < (\old(m) % 4294967296))) && !((\old(m) == 1))) [2023-11-12 02:12:38,432 WARN L141 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (((((m <= (16777215 + ((m / 4294967296) * 4294967296))) && (m <= 33554430)) && (0 <= m)) || ((((m == \old(m)) && (m <= (16777215 + ((m / 4294967296) * 4294967296)))) && (\old(e) <= e)) && ((e == \old(e)) || (e == 0)))) && (0 < (\old(m) % 4294967296))) [2023-11-12 02:12:38,433 WARN L141 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (((\old(e) <= e) && (0 < (\old(m) % 4294967296))) && !((\old(m) == 1))) [2023-11-12 02:12:38,476 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ddd159-0e32-40ae-84b1-2ea903d1b1a2/bin/uautomizer-verify-uTZkv6EMXl/witness.graphml [2023-11-12 02:12:38,476 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ddd159-0e32-40ae-84b1-2ea903d1b1a2/bin/uautomizer-verify-uTZkv6EMXl/witness.yml [2023-11-12 02:12:38,477 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-12 02:12:38,477 INFO L158 Benchmark]: Toolchain (without parser) took 14157.61ms. Allocated memory was 159.4MB in the beginning and 205.5MB in the end (delta: 46.1MB). Free memory was 112.6MB in the beginning and 92.6MB in the end (delta: 20.0MB). Peak memory consumption was 66.5MB. Max. memory is 16.1GB. [2023-11-12 02:12:38,478 INFO L158 Benchmark]: CDTParser took 0.46ms. Allocated memory is still 159.4MB. Free memory is still 133.6MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-12 02:12:38,479 INFO L158 Benchmark]: CACSL2BoogieTranslator took 426.39ms. Allocated memory is still 159.4MB. Free memory was 112.3MB in the beginning and 98.7MB in the end (delta: 13.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-11-12 02:12:38,479 INFO L158 Benchmark]: Boogie Procedure Inliner took 45.48ms. Allocated memory is still 159.4MB. Free memory was 98.7MB in the beginning and 97.0MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-12 02:12:38,479 INFO L158 Benchmark]: Boogie Preprocessor took 32.94ms. Allocated memory is still 159.4MB. Free memory was 96.6MB in the beginning and 95.2MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-12 02:12:38,480 INFO L158 Benchmark]: RCFGBuilder took 624.37ms. Allocated memory is still 159.4MB. Free memory was 95.2MB in the beginning and 76.7MB in the end (delta: 18.5MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2023-11-12 02:12:38,480 INFO L158 Benchmark]: TraceAbstraction took 12886.43ms. Allocated memory was 159.4MB in the beginning and 205.5MB in the end (delta: 46.1MB). Free memory was 76.0MB in the beginning and 98.9MB in the end (delta: -22.9MB). Peak memory consumption was 24.6MB. Max. memory is 16.1GB. [2023-11-12 02:12:38,482 INFO L158 Benchmark]: Witness Printer took 134.23ms. Allocated memory is still 205.5MB. Free memory was 98.9MB in the beginning and 92.6MB in the end (delta: 6.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2023-11-12 02:12:38,487 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.46ms. Allocated memory is still 159.4MB. Free memory is still 133.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 426.39ms. Allocated memory is still 159.4MB. Free memory was 112.3MB in the beginning and 98.7MB in the end (delta: 13.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 45.48ms. Allocated memory is still 159.4MB. Free memory was 98.7MB in the beginning and 97.0MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 32.94ms. Allocated memory is still 159.4MB. Free memory was 96.6MB in the beginning and 95.2MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 624.37ms. Allocated memory is still 159.4MB. Free memory was 95.2MB in the beginning and 76.7MB in the end (delta: 18.5MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * TraceAbstraction took 12886.43ms. Allocated memory was 159.4MB in the beginning and 205.5MB in the end (delta: 46.1MB). Free memory was 76.0MB in the beginning and 98.9MB in the end (delta: -22.9MB). Peak memory consumption was 24.6MB. Max. memory is 16.1GB. * Witness Printer took 134.23ms. Allocated memory is still 205.5MB. Free memory was 98.9MB in the beginning and 92.6MB in the end (delta: 6.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 17]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 69 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 12.8s, OverallIterations: 15, TraceHistogramMax: 4, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.1s, AutomataDifference: 3.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.5s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1108 SdHoareTripleChecker+Valid, 1.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1105 mSDsluCounter, 6998 SdHoareTripleChecker+Invalid, 1.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 5789 mSDsCounter, 67 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1586 IncrementalHoareTripleChecker+Invalid, 1653 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 67 mSolverCounterUnsat, 1209 mSDtfsCounter, 1586 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1284 GetRequests, 1085 SyntacticMatches, 6 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 643 ImplicationChecksByTransitivity, 2.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=173occurred in iteration=7, InterpolantAutomatonStates: 141, 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, 15 MinimizatonAttempts, 232 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 128 PreInvPairs, 187 NumberOfFragments, 88 HoareAnnotationTreeSize, 128 FomulaSimplifications, 1393 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 9 FomulaSimplificationsInter, 1270 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 4.7s InterpolantComputationTime, 1539 NumberOfCodeBlocks, 1505 NumberOfCodeBlocksAsserted, 26 NumberOfCheckSat, 1859 ConstructedInterpolants, 0 QuantifiedInterpolants, 3315 SizeOfPredicates, 45 NumberOfNonLiveVariables, 1940 ConjunctsInSsa, 161 ConjunctsInUnsatCore, 32 InterpolantComputations, 10 PerfectInterpolantSequences, 876/1067 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 37]: Loop Invariant Derived loop invariant: (((((m <= (16777215 + ((m / 4294967296) * 4294967296))) && (m <= 33554430)) && (0 <= m)) || ((((m == \old(m)) && (m <= (16777215 + ((m / 4294967296) * 4294967296)))) && (\old(e) <= e)) && ((e == \old(e)) || (e == 0)))) && (0 < (\old(m) % 4294967296))) - InvariantResult [Line: 57]: Loop Invariant Derived loop invariant: (((\old(e) <= e) && (0 < (\old(m) % 4294967296))) && !((\old(m) == 1))) RESULT: Ultimate proved your program to be correct! [2023-11-12 02:12:38,541 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ddd159-0e32-40ae-84b1-2ea903d1b1a2/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE