./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound5.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4131af82-0bc5-478e-99b5-eb90009dcbb9/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4131af82-0bc5-478e-99b5-eb90009dcbb9/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_4131af82-0bc5-478e-99b5-eb90009dcbb9/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4131af82-0bc5-478e-99b5-eb90009dcbb9/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound5.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4131af82-0bc5-478e-99b5-eb90009dcbb9/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_4131af82-0bc5-478e-99b5-eb90009dcbb9/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 3d0e3bce6f4731d98bf8e5301c405fc62948194b21f76143536933e108212a93 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:07:18,764 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:07:18,834 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4131af82-0bc5-478e-99b5-eb90009dcbb9/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-12 02:07:18,840 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:07:18,841 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:07:18,865 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:07:18,866 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:07:18,867 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:07:18,868 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:07:18,868 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:07:18,869 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:07:18,870 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:07:18,870 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:07:18,871 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:07:18,871 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:07:18,872 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:07:18,872 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:07:18,873 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:07:18,873 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:07:18,874 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:07:18,875 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:07:18,875 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:07:18,876 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:07:18,876 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:07:18,877 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:07:18,881 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:07:18,881 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:07:18,882 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:07:18,883 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:07:18,884 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:07:18,885 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:07:18,886 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:07:18,886 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:07:18,886 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:07:18,886 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:07:18,887 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:07:18,887 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:07:18,887 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:07:18,887 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:07:18,888 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_4131af82-0bc5-478e-99b5-eb90009dcbb9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4131af82-0bc5-478e-99b5-eb90009dcbb9/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3d0e3bce6f4731d98bf8e5301c405fc62948194b21f76143536933e108212a93 [2023-11-12 02:07:19,174 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:07:19,208 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:07:19,211 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:07:19,213 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:07:19,214 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:07:19,215 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4131af82-0bc5-478e-99b5-eb90009dcbb9/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound5.i [2023-11-12 02:07:22,503 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:07:22,728 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:07:22,728 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4131af82-0bc5-478e-99b5-eb90009dcbb9/sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound5.i [2023-11-12 02:07:22,742 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4131af82-0bc5-478e-99b5-eb90009dcbb9/bin/uautomizer-verify-uTZkv6EMXl/data/30902101a/288fa6f5b7d04955b2fcf9dda98e41c8/FLAGf0588d77f [2023-11-12 02:07:22,756 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4131af82-0bc5-478e-99b5-eb90009dcbb9/bin/uautomizer-verify-uTZkv6EMXl/data/30902101a/288fa6f5b7d04955b2fcf9dda98e41c8 [2023-11-12 02:07:22,758 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:07:22,760 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:07:22,762 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:07:22,762 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:07:22,771 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:07:22,771 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:07:22" (1/1) ... [2023-11-12 02:07:22,773 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6cedfe51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:07:22, skipping insertion in model container [2023-11-12 02:07:22,773 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:07:22" (1/1) ... [2023-11-12 02:07:22,795 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:07:22,942 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_4131af82-0bc5-478e-99b5-eb90009dcbb9/sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound5.i[950,963] [2023-11-12 02:07:22,960 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:07:22,970 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:07:22,983 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_4131af82-0bc5-478e-99b5-eb90009dcbb9/sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound5.i[950,963] [2023-11-12 02:07:22,990 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:07:23,005 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:07:23,005 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:07:23 WrapperNode [2023-11-12 02:07:23,005 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:07:23,007 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:07:23,007 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:07:23,007 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:07:23,015 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:07:23" (1/1) ... [2023-11-12 02:07:23,022 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:07:23" (1/1) ... [2023-11-12 02:07:23,045 INFO L138 Inliner]: procedures = 16, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 55 [2023-11-12 02:07:23,046 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:07:23,047 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:07:23,047 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:07:23,047 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:07:23,056 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:07:23" (1/1) ... [2023-11-12 02:07:23,057 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:07:23" (1/1) ... [2023-11-12 02:07:23,071 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:07:23" (1/1) ... [2023-11-12 02:07:23,072 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:07:23" (1/1) ... [2023-11-12 02:07:23,075 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:07:23" (1/1) ... [2023-11-12 02:07:23,079 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:07:23" (1/1) ... [2023-11-12 02:07:23,083 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:07:23" (1/1) ... [2023-11-12 02:07:23,086 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:07:23" (1/1) ... [2023-11-12 02:07:23,088 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:07:23,089 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:07:23,089 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:07:23,089 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:07:23,090 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:07:23" (1/1) ... [2023-11-12 02:07:23,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:07:23,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4131af82-0bc5-478e-99b5-eb90009dcbb9/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:07:23,147 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4131af82-0bc5-478e-99b5-eb90009dcbb9/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:07:23,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4131af82-0bc5-478e-99b5-eb90009dcbb9/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:07:23,191 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:07:23,191 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-12 02:07:23,192 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-12 02:07:23,192 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:07:23,192 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:07:23,192 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:07:23,192 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-12 02:07:23,193 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-12 02:07:23,267 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:07:23,269 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:07:23,509 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:07:23,515 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:07:23,516 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-12 02:07:23,518 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:07:23 BoogieIcfgContainer [2023-11-12 02:07:23,518 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:07:23,521 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:07:23,521 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:07:23,524 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:07:23,524 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:07:22" (1/3) ... [2023-11-12 02:07:23,525 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ea6cbd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:07:23, skipping insertion in model container [2023-11-12 02:07:23,526 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:07:23" (2/3) ... [2023-11-12 02:07:23,526 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ea6cbd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:07:23, skipping insertion in model container [2023-11-12 02:07:23,526 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:07:23" (3/3) ... [2023-11-12 02:07:23,527 INFO L112 eAbstractionObserver]: Analyzing ICFG divbin_unwindbound5.i [2023-11-12 02:07:23,548 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:07:23,549 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 02:07:23,606 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:07:23,614 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;@13ebe777, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:07:23,615 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 02:07:23,620 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-12 02:07:23,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-12 02:07:23,630 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:07:23,631 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:07:23,632 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:07:23,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:07:23,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1267887399, now seen corresponding path program 1 times [2023-11-12 02:07:23,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:07:23,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720327710] [2023-11-12 02:07:23,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:07:23,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:07:23,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:07:23,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:07:23,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720327710] [2023-11-12 02:07:23,783 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-12 02:07:23,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790961319] [2023-11-12 02:07:23,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:07:23,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:07:23,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4131af82-0bc5-478e-99b5-eb90009dcbb9/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:07:23,794 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4131af82-0bc5-478e-99b5-eb90009dcbb9/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:07:23,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4131af82-0bc5-478e-99b5-eb90009dcbb9/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:07:23,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:07:23,909 INFO L262 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-12 02:07:23,916 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:07:23,940 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 02:07:23,941 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:07:23,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790961319] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:07:23,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:07:23,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:07:23,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865649370] [2023-11-12 02:07:23,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:07:23,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-12 02:07:23,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:07:23,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-12 02:07:23,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 02:07:23,979 INFO L87 Difference]: Start difference. First operand has 28 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 02:07:24,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:07:24,000 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2023-11-12 02:07:24,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-12 02:07:24,003 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2023-11-12 02:07:24,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:07:24,009 INFO L225 Difference]: With dead ends: 53 [2023-11-12 02:07:24,010 INFO L226 Difference]: Without dead ends: 24 [2023-11-12 02:07:24,012 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 02:07:24,016 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:07:24,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:07:24,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-11-12 02:07:24,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-11-12 02:07:24,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-12 02:07:24,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2023-11-12 02:07:24,057 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 19 [2023-11-12 02:07:24,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:07:24,057 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2023-11-12 02:07:24,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 02:07:24,058 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2023-11-12 02:07:24,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-12 02:07:24,060 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:07:24,060 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:07:24,066 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4131af82-0bc5-478e-99b5-eb90009dcbb9/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 02:07:24,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4131af82-0bc5-478e-99b5-eb90009dcbb9/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-12 02:07:24,262 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:07:24,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:07:24,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1485611193, now seen corresponding path program 1 times [2023-11-12 02:07:24,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:07:24,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136052312] [2023-11-12 02:07:24,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:07:24,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:07:24,307 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:07:24,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [391878090] [2023-11-12 02:07:24,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:07:24,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:07:24,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4131af82-0bc5-478e-99b5-eb90009dcbb9/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:07:24,311 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4131af82-0bc5-478e-99b5-eb90009dcbb9/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:07:24,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4131af82-0bc5-478e-99b5-eb90009dcbb9/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:07:24,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:07:24,383 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 02:07:24,386 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:07:24,468 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 02:07:24,469 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:07:24,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:07:24,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136052312] [2023-11-12 02:07:24,470 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:07:24,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391878090] [2023-11-12 02:07:24,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391878090] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:07:24,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:07:24,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:07:24,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88544099] [2023-11-12 02:07:24,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:07:24,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:07:24,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:07:24,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:07:24,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:07:24,475 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-12 02:07:24,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:07:24,498 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2023-11-12 02:07:24,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:07:24,499 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2023-11-12 02:07:24,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:07:24,500 INFO L225 Difference]: With dead ends: 38 [2023-11-12 02:07:24,500 INFO L226 Difference]: Without dead ends: 26 [2023-11-12 02:07:24,501 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:07:24,503 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:07:24,504 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 71 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:07:24,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-12 02:07:24,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-11-12 02:07:24,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-12 02:07:24,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2023-11-12 02:07:24,513 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 21 [2023-11-12 02:07:24,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:07:24,515 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2023-11-12 02:07:24,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-12 02:07:24,515 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2023-11-12 02:07:24,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-12 02:07:24,516 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:07:24,517 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:07:24,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4131af82-0bc5-478e-99b5-eb90009dcbb9/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 02:07:24,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4131af82-0bc5-478e-99b5-eb90009dcbb9/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-12 02:07:24,723 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:07:24,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:07:24,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1580975129, now seen corresponding path program 1 times [2023-11-12 02:07:24,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:07:24,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429247236] [2023-11-12 02:07:24,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:07:24,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:07:24,750 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:07:24,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1648448876] [2023-11-12 02:07:24,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:07:24,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:07:24,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4131af82-0bc5-478e-99b5-eb90009dcbb9/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:07:24,753 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4131af82-0bc5-478e-99b5-eb90009dcbb9/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:07:24,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4131af82-0bc5-478e-99b5-eb90009dcbb9/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 02:07:24,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:07:24,844 INFO L262 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-12 02:07:24,848 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:07:25,310 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 02:07:25,310 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:07:25,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:07:25,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429247236] [2023-11-12 02:07:25,311 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:07:25,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648448876] [2023-11-12 02:07:25,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648448876] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:07:25,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:07:25,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-12 02:07:25,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020896446] [2023-11-12 02:07:25,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:07:25,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-12 02:07:25,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:07:25,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-12 02:07:25,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-11-12 02:07:25,315 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 02:07:25,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:07:25,497 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2023-11-12 02:07:25,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-12 02:07:25,498 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2023-11-12 02:07:25,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:07:25,499 INFO L225 Difference]: With dead ends: 38 [2023-11-12 02:07:25,499 INFO L226 Difference]: Without dead ends: 35 [2023-11-12 02:07:25,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2023-11-12 02:07:25,501 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 33 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:07:25,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 124 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:07:25,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-11-12 02:07:25,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2023-11-12 02:07:25,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 27 states have internal predecessors, (33), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-12 02:07:25,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2023-11-12 02:07:25,514 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 22 [2023-11-12 02:07:25,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:07:25,515 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2023-11-12 02:07:25,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 02:07:25,515 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2023-11-12 02:07:25,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-12 02:07:25,516 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:07:25,516 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:07:25,526 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4131af82-0bc5-478e-99b5-eb90009dcbb9/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 02:07:25,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4131af82-0bc5-478e-99b5-eb90009dcbb9/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:07:25,722 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:07:25,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:07:25,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1106421036, now seen corresponding path program 1 times [2023-11-12 02:07:25,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:07:25,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596819508] [2023-11-12 02:07:25,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:07:25,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:07:25,742 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:07:25,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1991121704] [2023-11-12 02:07:25,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:07:25,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:07:25,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4131af82-0bc5-478e-99b5-eb90009dcbb9/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:07:25,748 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4131af82-0bc5-478e-99b5-eb90009dcbb9/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:07:25,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4131af82-0bc5-478e-99b5-eb90009dcbb9/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 02:07:25,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:07:25,802 INFO L262 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-12 02:07:25,805 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:07:25,876 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 02:07:25,877 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:07:25,943 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 02:07:25,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:07:25,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596819508] [2023-11-12 02:07:25,943 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:07:25,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991121704] [2023-11-12 02:07:25,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991121704] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:07:25,944 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:07:25,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2023-11-12 02:07:25,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015025149] [2023-11-12 02:07:25,945 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:07:25,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 02:07:25,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:07:25,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 02:07:25,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:07:25,948 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (5), 3 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 02:07:26,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:07:26,034 INFO L93 Difference]: Finished difference Result 69 states and 88 transitions. [2023-11-12 02:07:26,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-12 02:07:26,034 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (5), 3 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 24 [2023-11-12 02:07:26,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:07:26,036 INFO L225 Difference]: With dead ends: 69 [2023-11-12 02:07:26,036 INFO L226 Difference]: Without dead ends: 57 [2023-11-12 02:07:26,037 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-11-12 02:07:26,038 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 29 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:07:26,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 101 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:07:26,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-11-12 02:07:26,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 43. [2023-11-12 02:07:26,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 35 states have internal predecessors, (43), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-12 02:07:26,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2023-11-12 02:07:26,051 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 24 [2023-11-12 02:07:26,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:07:26,052 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2023-11-12 02:07:26,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (5), 3 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 02:07:26,052 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2023-11-12 02:07:26,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-12 02:07:26,053 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:07:26,054 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:07:26,067 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4131af82-0bc5-478e-99b5-eb90009dcbb9/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 02:07:26,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4131af82-0bc5-478e-99b5-eb90009dcbb9/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:07:26,260 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:07:26,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:07:26,260 INFO L85 PathProgramCache]: Analyzing trace with hash -450968108, now seen corresponding path program 1 times [2023-11-12 02:07:26,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:07:26,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43774320] [2023-11-12 02:07:26,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:07:26,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:07:26,278 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:07:26,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [872405229] [2023-11-12 02:07:26,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:07:26,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:07:26,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4131af82-0bc5-478e-99b5-eb90009dcbb9/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:07:26,280 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4131af82-0bc5-478e-99b5-eb90009dcbb9/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:07:26,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4131af82-0bc5-478e-99b5-eb90009dcbb9/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 02:07:26,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:07:26,359 INFO L262 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-12 02:07:26,362 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:07:26,554 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:07:26,554 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:07:26,790 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 02:07:26,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:07:26,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43774320] [2023-11-12 02:07:26,794 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:07:26,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872405229] [2023-11-12 02:07:26,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872405229] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-12 02:07:26,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:07:26,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 13 [2023-11-12 02:07:26,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002458924] [2023-11-12 02:07:26,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:07:26,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 02:07:26,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:07:26,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 02:07:26,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2023-11-12 02:07:26,804 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-12 02:07:29,802 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-12 02:07:31,809 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-12 02:07:31,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:07:31,893 INFO L93 Difference]: Finished difference Result 59 states and 73 transitions. [2023-11-12 02:07:31,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 02:07:31,894 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2023-11-12 02:07:31,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:07:31,896 INFO L225 Difference]: With dead ends: 59 [2023-11-12 02:07:31,896 INFO L226 Difference]: Without dead ends: 56 [2023-11-12 02:07:31,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2023-11-12 02:07:31,897 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 16 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 5 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:07:31,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 89 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 30 Invalid, 2 Unknown, 0 Unchecked, 5.0s Time] [2023-11-12 02:07:31,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-11-12 02:07:31,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 43. [2023-11-12 02:07:31,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 35 states have internal predecessors, (43), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-12 02:07:31,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2023-11-12 02:07:31,924 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 25 [2023-11-12 02:07:31,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:07:31,925 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2023-11-12 02:07:31,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-12 02:07:31,926 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2023-11-12 02:07:31,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-12 02:07:31,928 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:07:31,929 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:07:31,942 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4131af82-0bc5-478e-99b5-eb90009dcbb9/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-12 02:07:32,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4131af82-0bc5-478e-99b5-eb90009dcbb9/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:07:32,139 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:07:32,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:07:32,139 INFO L85 PathProgramCache]: Analyzing trace with hash -791365823, now seen corresponding path program 1 times [2023-11-12 02:07:32,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:07:32,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438915391] [2023-11-12 02:07:32,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:07:32,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:07:32,154 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:07:32,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [103284922] [2023-11-12 02:07:32,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:07:32,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:07:32,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4131af82-0bc5-478e-99b5-eb90009dcbb9/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:07:32,156 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4131af82-0bc5-478e-99b5-eb90009dcbb9/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:07:32,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4131af82-0bc5-478e-99b5-eb90009dcbb9/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 02:07:32,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:07:32,231 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 02:07:32,233 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:07:32,256 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 02:07:32,257 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:07:32,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:07:32,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438915391] [2023-11-12 02:07:32,257 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:07:32,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103284922] [2023-11-12 02:07:32,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103284922] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:07:32,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:07:32,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:07:32,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928986741] [2023-11-12 02:07:32,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:07:32,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:07:32,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:07:32,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:07:32,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:07:32,261 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-12 02:07:32,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:07:32,322 INFO L93 Difference]: Finished difference Result 59 states and 72 transitions. [2023-11-12 02:07:32,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:07:32,324 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), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2023-11-12 02:07:32,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:07:32,329 INFO L225 Difference]: With dead ends: 59 [2023-11-12 02:07:32,329 INFO L226 Difference]: Without dead ends: 43 [2023-11-12 02:07:32,330 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 29 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 02:07:32,333 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:07:32,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 50 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:07:32,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-11-12 02:07:32,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2023-11-12 02:07:32,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 35 states have internal predecessors, (42), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-12 02:07:32,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2023-11-12 02:07:32,367 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 31 [2023-11-12 02:07:32,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:07:32,367 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2023-11-12 02:07:32,368 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), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-12 02:07:32,368 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2023-11-12 02:07:32,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-12 02:07:32,376 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:07:32,377 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:07:32,388 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4131af82-0bc5-478e-99b5-eb90009dcbb9/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-12 02:07:32,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4131af82-0bc5-478e-99b5-eb90009dcbb9/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:07:32,583 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:07:32,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:07:32,584 INFO L85 PathProgramCache]: Analyzing trace with hash 675416052, now seen corresponding path program 1 times [2023-11-12 02:07:32,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:07:32,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352219285] [2023-11-12 02:07:32,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:07:32,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:07:32,603 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:07:32,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [848528919] [2023-11-12 02:07:32,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:07:32,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:07:32,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4131af82-0bc5-478e-99b5-eb90009dcbb9/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:07:32,624 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4131af82-0bc5-478e-99b5-eb90009dcbb9/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:07:32,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4131af82-0bc5-478e-99b5-eb90009dcbb9/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 02:07:32,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:07:32,747 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-12 02:07:32,750 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:07:33,026 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:07:33,027 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:07:37,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:07:37,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352219285] [2023-11-12 02:07:37,421 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:07:37,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848528919] [2023-11-12 02:07:37,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848528919] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:07:37,422 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:07:37,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2023-11-12 02:07:37,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417224094] [2023-11-12 02:07:37,422 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-12 02:07:37,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-12 02:07:37,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:07:37,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-12 02:07:37,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=172, Unknown=2, NotChecked=0, Total=210 [2023-11-12 02:07:37,424 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-12 02:07:37,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:07:37,738 INFO L93 Difference]: Finished difference Result 64 states and 79 transitions. [2023-11-12 02:07:37,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-12 02:07:37,739 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 34 [2023-11-12 02:07:37,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:07:37,740 INFO L225 Difference]: With dead ends: 64 [2023-11-12 02:07:37,740 INFO L226 Difference]: Without dead ends: 60 [2023-11-12 02:07:37,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=75, Invalid=343, Unknown=2, NotChecked=0, Total=420 [2023-11-12 02:07:37,742 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 48 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 02:07:37,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 177 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 02:07:37,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-11-12 02:07:37,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 55. [2023-11-12 02:07:37,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 43 states have (on average 1.2093023255813953) internal successors, (52), 45 states have internal predecessors, (52), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-12 02:07:37,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2023-11-12 02:07:37,762 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 34 [2023-11-12 02:07:37,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:07:37,763 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2023-11-12 02:07:37,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-12 02:07:37,764 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2023-11-12 02:07:37,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-12 02:07:37,764 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:07:37,765 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:07:37,778 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4131af82-0bc5-478e-99b5-eb90009dcbb9/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-12 02:07:37,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4131af82-0bc5-478e-99b5-eb90009dcbb9/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-12 02:07:37,971 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:07:37,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:07:37,971 INFO L85 PathProgramCache]: Analyzing trace with hash 886516180, now seen corresponding path program 2 times [2023-11-12 02:07:37,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:07:37,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518779781] [2023-11-12 02:07:37,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:07:37,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:07:38,019 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:07:38,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1876261865] [2023-11-12 02:07:38,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:07:38,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:07:38,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4131af82-0bc5-478e-99b5-eb90009dcbb9/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:07:38,023 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4131af82-0bc5-478e-99b5-eb90009dcbb9/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:07:38,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4131af82-0bc5-478e-99b5-eb90009dcbb9/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-12 02:07:38,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:07:38,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:07:38,494 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-12 02:07:38,497 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:07:56,866 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-12 02:07:56,866 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:08:00,270 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-12 02:08:00,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:08:00,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518779781] [2023-11-12 02:08:00,270 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:08:00,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876261865] [2023-11-12 02:08:00,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876261865] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:08:00,270 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:08:00,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 20 [2023-11-12 02:08:00,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295994364] [2023-11-12 02:08:00,271 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:08:00,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-12 02:08:00,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:08:00,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-12 02:08:00,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=305, Unknown=1, NotChecked=0, Total=380 [2023-11-12 02:08:00,273 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand has 20 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 17 states have internal predecessors, (50), 7 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2023-11-12 02:08:03,128 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-11-12 02:08:08,005 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-11-12 02:08:09,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:08:09,776 INFO L93 Difference]: Finished difference Result 99 states and 121 transitions. [2023-11-12 02:08:09,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-12 02:08:09,779 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 17 states have internal predecessors, (50), 7 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) Word has length 43 [2023-11-12 02:08:09,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:08:09,781 INFO L225 Difference]: With dead ends: 99 [2023-11-12 02:08:09,782 INFO L226 Difference]: Without dead ends: 65 [2023-11-12 02:08:09,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=104, Invalid=447, Unknown=1, NotChecked=0, Total=552 [2023-11-12 02:08:09,783 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 40 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 7 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.3s IncrementalHoareTripleChecker+Time [2023-11-12 02:08:09,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 279 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 205 Invalid, 2 Unknown, 0 Unchecked, 9.3s Time] [2023-11-12 02:08:09,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-11-12 02:08:09,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 55. [2023-11-12 02:08:09,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 43 states have (on average 1.186046511627907) internal successors, (51), 45 states have internal predecessors, (51), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-12 02:08:09,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2023-11-12 02:08:09,804 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 43 [2023-11-12 02:08:09,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:08:09,804 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2023-11-12 02:08:09,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 17 states have internal predecessors, (50), 7 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2023-11-12 02:08:09,805 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2023-11-12 02:08:09,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-12 02:08:09,807 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:08:09,807 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:08:09,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4131af82-0bc5-478e-99b5-eb90009dcbb9/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-12 02:08:10,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4131af82-0bc5-478e-99b5-eb90009dcbb9/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-12 02:08:10,023 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:08:10,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:08:10,023 INFO L85 PathProgramCache]: Analyzing trace with hash -2006317561, now seen corresponding path program 3 times [2023-11-12 02:08:10,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:08:10,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101019664] [2023-11-12 02:08:10,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:08:10,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:08:10,047 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:08:10,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1975407352] [2023-11-12 02:08:10,049 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 02:08:10,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:08:10,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4131af82-0bc5-478e-99b5-eb90009dcbb9/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:08:10,051 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4131af82-0bc5-478e-99b5-eb90009dcbb9/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:08:10,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4131af82-0bc5-478e-99b5-eb90009dcbb9/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-12 02:08:10,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-12 02:08:10,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:08:10,195 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-12 02:08:10,197 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:08:10,323 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 26 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 02:08:10,323 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:08:10,413 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-12 02:08:10,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:08:10,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101019664] [2023-11-12 02:08:10,413 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:08:10,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975407352] [2023-11-12 02:08:10,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975407352] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:08:10,414 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:08:10,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 9 [2023-11-12 02:08:10,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633179425] [2023-11-12 02:08:10,417 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:08:10,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-12 02:08:10,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:08:10,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-12 02:08:10,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2023-11-12 02:08:10,419 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 4 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-11-12 02:08:10,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:08:10,502 INFO L93 Difference]: Finished difference Result 100 states and 114 transitions. [2023-11-12 02:08:10,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 02:08:10,503 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 4 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 46 [2023-11-12 02:08:10,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:08:10,504 INFO L225 Difference]: With dead ends: 100 [2023-11-12 02:08:10,504 INFO L226 Difference]: Without dead ends: 43 [2023-11-12 02:08:10,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 77 SyntacticMatches, 6 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2023-11-12 02:08:10,511 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 15 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:08:10,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 133 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:08:10,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-11-12 02:08:10,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2023-11-12 02:08:10,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 34 states have internal predecessors, (35), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-12 02:08:10,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2023-11-12 02:08:10,556 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 46 [2023-11-12 02:08:10,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:08:10,559 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2023-11-12 02:08:10,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 4 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-11-12 02:08:10,559 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2023-11-12 02:08:10,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-12 02:08:10,561 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:08:10,561 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:08:10,576 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4131af82-0bc5-478e-99b5-eb90009dcbb9/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-12 02:08:10,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4131af82-0bc5-478e-99b5-eb90009dcbb9/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-12 02:08:10,767 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:08:10,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:08:10,767 INFO L85 PathProgramCache]: Analyzing trace with hash -2008105021, now seen corresponding path program 1 times [2023-11-12 02:08:10,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:08:10,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698690816] [2023-11-12 02:08:10,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:08:10,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:08:10,780 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:08:10,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1513214449] [2023-11-12 02:08:10,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:08:10,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:08:10,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4131af82-0bc5-478e-99b5-eb90009dcbb9/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:08:10,786 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4131af82-0bc5-478e-99b5-eb90009dcbb9/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:08:10,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4131af82-0bc5-478e-99b5-eb90009dcbb9/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-12 02:08:13,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:08:13,372 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 53 conjunts are in the unsatisfiable core [2023-11-12 02:08:13,375 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:08:15,418 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-12 02:08:15,419 INFO L327 TraceCheckSpWp]: Computing backward predicates...