./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-multidimensional/init-2-n-u.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3050dc7d-2d28-4be0-bbb2-4d51c96cb4bd/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3050dc7d-2d28-4be0-bbb2-4d51c96cb4bd/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3050dc7d-2d28-4be0-bbb2-4d51c96cb4bd/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3050dc7d-2d28-4be0-bbb2-4d51c96cb4bd/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-multidimensional/init-2-n-u.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3050dc7d-2d28-4be0-bbb2-4d51c96cb4bd/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3050dc7d-2d28-4be0-bbb2-4d51c96cb4bd/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 44b18e123610caaf6237dddd08dfbd765ad919d1168e6261239628431b3c22b1 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 21:14:07,710 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 21:14:07,807 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3050dc7d-2d28-4be0-bbb2-4d51c96cb4bd/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 21:14:07,823 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 21:14:07,823 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 21:14:07,857 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 21:14:07,858 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 21:14:07,859 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 21:14:07,860 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 21:14:07,865 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 21:14:07,867 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 21:14:07,867 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 21:14:07,868 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 21:14:07,879 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 21:14:07,879 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 21:14:07,880 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 21:14:07,880 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 21:14:07,881 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 21:14:07,881 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 21:14:07,882 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 21:14:07,882 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 21:14:07,883 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 21:14:07,883 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 21:14:07,884 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 21:14:07,884 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 21:14:07,885 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 21:14:07,885 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 21:14:07,886 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 21:14:07,886 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:14:07,887 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 21:14:07,888 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 21:14:07,888 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 21:14:07,889 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 21:14:07,889 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 21:14:07,889 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 21:14:07,889 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 21:14:07,890 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 21:14:07,890 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 21:14:07,890 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 21:14:07,891 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_3050dc7d-2d28-4be0-bbb2-4d51c96cb4bd/bin/uautomizer-verify-WvqO1wxjHP/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3050dc7d-2d28-4be0-bbb2-4d51c96cb4bd/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 44b18e123610caaf6237dddd08dfbd765ad919d1168e6261239628431b3c22b1 [2023-11-06 21:14:08,199 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 21:14:08,220 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 21:14:08,223 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 21:14:08,224 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 21:14:08,225 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 21:14:08,226 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3050dc7d-2d28-4be0-bbb2-4d51c96cb4bd/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/array-multidimensional/init-2-n-u.c [2023-11-06 21:14:11,280 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 21:14:11,511 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 21:14:11,512 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3050dc7d-2d28-4be0-bbb2-4d51c96cb4bd/sv-benchmarks/c/array-multidimensional/init-2-n-u.c [2023-11-06 21:14:11,521 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3050dc7d-2d28-4be0-bbb2-4d51c96cb4bd/bin/uautomizer-verify-WvqO1wxjHP/data/91a573d98/8f5488ee9881420d93a340db1a851443/FLAG5a7ecb731 [2023-11-06 21:14:11,537 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3050dc7d-2d28-4be0-bbb2-4d51c96cb4bd/bin/uautomizer-verify-WvqO1wxjHP/data/91a573d98/8f5488ee9881420d93a340db1a851443 [2023-11-06 21:14:11,548 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 21:14:11,552 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 21:14:11,558 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 21:14:11,558 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 21:14:11,564 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 21:14:11,565 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:14:11" (1/1) ... [2023-11-06 21:14:11,566 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23319e58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:11, skipping insertion in model container [2023-11-06 21:14:11,566 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:14:11" (1/1) ... [2023-11-06 21:14:11,588 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 21:14:11,761 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_3050dc7d-2d28-4be0-bbb2-4d51c96cb4bd/sv-benchmarks/c/array-multidimensional/init-2-n-u.c[322,335] [2023-11-06 21:14:11,784 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:14:11,794 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 21:14:11,806 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_3050dc7d-2d28-4be0-bbb2-4d51c96cb4bd/sv-benchmarks/c/array-multidimensional/init-2-n-u.c[322,335] [2023-11-06 21:14:11,814 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:14:11,829 INFO L206 MainTranslator]: Completed translation [2023-11-06 21:14:11,830 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:11 WrapperNode [2023-11-06 21:14:11,830 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 21:14:11,832 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 21:14:11,832 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 21:14:11,832 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 21:14:11,840 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:11" (1/1) ... [2023-11-06 21:14:11,848 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:11" (1/1) ... [2023-11-06 21:14:11,868 INFO L138 Inliner]: procedures = 14, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 60 [2023-11-06 21:14:11,869 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 21:14:11,870 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 21:14:11,870 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 21:14:11,870 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 21:14:11,880 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:11" (1/1) ... [2023-11-06 21:14:11,880 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:11" (1/1) ... [2023-11-06 21:14:11,882 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:11" (1/1) ... [2023-11-06 21:14:11,882 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:11" (1/1) ... [2023-11-06 21:14:11,887 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:11" (1/1) ... [2023-11-06 21:14:11,891 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:11" (1/1) ... [2023-11-06 21:14:11,893 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:11" (1/1) ... [2023-11-06 21:14:11,894 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:11" (1/1) ... [2023-11-06 21:14:11,896 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 21:14:11,897 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 21:14:11,898 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 21:14:11,898 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 21:14:11,899 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:11" (1/1) ... [2023-11-06 21:14:11,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:14:11,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3050dc7d-2d28-4be0-bbb2-4d51c96cb4bd/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:14:11,937 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3050dc7d-2d28-4be0-bbb2-4d51c96cb4bd/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 21:14:11,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3050dc7d-2d28-4be0-bbb2-4d51c96cb4bd/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 21:14:11,981 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 21:14:11,981 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 21:14:11,981 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 21:14:11,981 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 21:14:11,982 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 21:14:11,982 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 21:14:11,982 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 21:14:11,982 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 21:14:12,058 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 21:14:12,060 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 21:14:12,201 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 21:14:12,208 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 21:14:12,208 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-06 21:14:12,210 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:14:12 BoogieIcfgContainer [2023-11-06 21:14:12,211 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 21:14:12,214 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 21:14:12,214 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 21:14:12,222 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 21:14:12,223 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 09:14:11" (1/3) ... [2023-11-06 21:14:12,224 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d41dc8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:14:12, skipping insertion in model container [2023-11-06 21:14:12,224 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:11" (2/3) ... [2023-11-06 21:14:12,224 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d41dc8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:14:12, skipping insertion in model container [2023-11-06 21:14:12,225 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:14:12" (3/3) ... [2023-11-06 21:14:12,226 INFO L112 eAbstractionObserver]: Analyzing ICFG init-2-n-u.c [2023-11-06 21:14:12,259 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 21:14:12,260 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 21:14:12,338 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 21:14:12,363 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7d3713b9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 21:14:12,364 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 21:14:12,368 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:12,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-06 21:14:12,376 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:14:12,377 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:14:12,377 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:14:12,383 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:14:12,384 INFO L85 PathProgramCache]: Analyzing trace with hash 252221889, now seen corresponding path program 1 times [2023-11-06 21:14:12,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:14:12,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295904324] [2023-11-06 21:14:12,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:14:12,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:14:12,552 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:14:12,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [687998980] [2023-11-06 21:14:12,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:14:12,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:14:12,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3050dc7d-2d28-4be0-bbb2-4d51c96cb4bd/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:14:12,560 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3050dc7d-2d28-4be0-bbb2-4d51c96cb4bd/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:14:12,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3050dc7d-2d28-4be0-bbb2-4d51c96cb4bd/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 21:14:12,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:14:12,689 INFO L262 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 21:14:12,694 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:14:12,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:14:12,822 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:14:12,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:14:12,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295904324] [2023-11-06 21:14:12,824 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:14:12,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687998980] [2023-11-06 21:14:12,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687998980] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:14:12,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:14:12,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:14:12,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664282533] [2023-11-06 21:14:12,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:14:12,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:14:12,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:14:12,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:14:12,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:14:12,883 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:12,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:14:12,946 INFO L93 Difference]: Finished difference Result 35 states and 55 transitions. [2023-11-06 21:14:12,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:14:12,949 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-06 21:14:12,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:14:12,957 INFO L225 Difference]: With dead ends: 35 [2023-11-06 21:14:12,958 INFO L226 Difference]: Without dead ends: 16 [2023-11-06 21:14:12,960 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:14:12,966 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 3 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:14:12,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 26 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:14:12,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-11-06 21:14:13,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 14. [2023-11-06 21:14:13,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:13,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2023-11-06 21:14:13,012 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 8 [2023-11-06 21:14:13,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:14:13,012 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2023-11-06 21:14:13,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:13,013 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2023-11-06 21:14:13,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-06 21:14:13,014 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:14:13,015 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:14:13,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3050dc7d-2d28-4be0-bbb2-4d51c96cb4bd/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 21:14:13,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3050dc7d-2d28-4be0-bbb2-4d51c96cb4bd/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:14:13,221 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:14:13,222 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:14:13,222 INFO L85 PathProgramCache]: Analyzing trace with hash -1550338388, now seen corresponding path program 1 times [2023-11-06 21:14:13,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:14:13,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452431947] [2023-11-06 21:14:13,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:14:13,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:14:13,244 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:14:13,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [818209367] [2023-11-06 21:14:13,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:14:13,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:14:13,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3050dc7d-2d28-4be0-bbb2-4d51c96cb4bd/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:14:13,249 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3050dc7d-2d28-4be0-bbb2-4d51c96cb4bd/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:14:13,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3050dc7d-2d28-4be0-bbb2-4d51c96cb4bd/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 21:14:13,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:14:13,338 INFO L262 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 21:14:13,339 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:14:13,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:14:13,389 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:14:13,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:14:13,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452431947] [2023-11-06 21:14:13,389 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:14:13,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818209367] [2023-11-06 21:14:13,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818209367] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:14:13,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:14:13,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 21:14:13,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643880837] [2023-11-06 21:14:13,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:14:13,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:14:13,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:14:13,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:14:13,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:14:13,393 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:13,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:14:13,450 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2023-11-06 21:14:13,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 21:14:13,452 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-11-06 21:14:13,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:14:13,453 INFO L225 Difference]: With dead ends: 32 [2023-11-06 21:14:13,454 INFO L226 Difference]: Without dead ends: 21 [2023-11-06 21:14:13,454 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:14:13,458 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 24 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:14:13,459 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 18 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:14:13,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-11-06 21:14:13,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 16. [2023-11-06 21:14:13,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:13,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2023-11-06 21:14:13,475 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 11 [2023-11-06 21:14:13,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:14:13,476 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2023-11-06 21:14:13,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:13,477 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2023-11-06 21:14:13,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-06 21:14:13,477 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:14:13,478 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:14:13,489 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3050dc7d-2d28-4be0-bbb2-4d51c96cb4bd/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 21:14:13,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3050dc7d-2d28-4be0-bbb2-4d51c96cb4bd/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-06 21:14:13,684 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:14:13,685 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:14:13,685 INFO L85 PathProgramCache]: Analyzing trace with hash -2127602064, now seen corresponding path program 1 times [2023-11-06 21:14:13,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:14:13,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338210833] [2023-11-06 21:14:13,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:14:13,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:14:13,697 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:14:13,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1931358128] [2023-11-06 21:14:13,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:14:13,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:14:13,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3050dc7d-2d28-4be0-bbb2-4d51c96cb4bd/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:14:13,699 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3050dc7d-2d28-4be0-bbb2-4d51c96cb4bd/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:14:13,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3050dc7d-2d28-4be0-bbb2-4d51c96cb4bd/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 21:14:13,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:14:13,758 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 21:14:13,759 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:14:13,810 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:14:13,810 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:14:13,851 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:14:13,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:14:13,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338210833] [2023-11-06 21:14:13,852 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:14:13,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931358128] [2023-11-06 21:14:13,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931358128] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:14:13,853 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 21:14:13,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-06 21:14:13,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273439578] [2023-11-06 21:14:13,854 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 21:14:13,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 21:14:13,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:14:13,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 21:14:13,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2023-11-06 21:14:13,857 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:13,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:14:13,962 INFO L93 Difference]: Finished difference Result 48 states and 60 transitions. [2023-11-06 21:14:13,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 21:14:13,963 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-06 21:14:13,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:14:13,965 INFO L225 Difference]: With dead ends: 48 [2023-11-06 21:14:13,966 INFO L226 Difference]: Without dead ends: 35 [2023-11-06 21:14:13,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2023-11-06 21:14:13,972 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 74 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:14:13,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 32 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:14:13,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-11-06 21:14:13,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2023-11-06 21:14:13,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 27 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:13,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2023-11-06 21:14:13,987 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 12 [2023-11-06 21:14:13,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:14:13,988 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2023-11-06 21:14:13,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:13,988 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2023-11-06 21:14:13,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-06 21:14:13,989 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:14:13,989 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:14:14,008 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3050dc7d-2d28-4be0-bbb2-4d51c96cb4bd/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 21:14:14,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3050dc7d-2d28-4be0-bbb2-4d51c96cb4bd/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-06 21:14:14,196 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:14:14,196 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:14:14,196 INFO L85 PathProgramCache]: Analyzing trace with hash 539330476, now seen corresponding path program 2 times [2023-11-06 21:14:14,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:14:14,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247841073] [2023-11-06 21:14:14,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:14:14,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:14:14,211 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:14:14,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1864142531] [2023-11-06 21:14:14,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 21:14:14,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:14:14,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3050dc7d-2d28-4be0-bbb2-4d51c96cb4bd/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:14:14,217 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3050dc7d-2d28-4be0-bbb2-4d51c96cb4bd/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:14:14,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3050dc7d-2d28-4be0-bbb2-4d51c96cb4bd/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 21:14:14,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 21:14:14,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:14:14,288 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 21:14:14,290 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:14:14,375 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:14:14,375 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:14:14,465 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:14:14,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:14:14,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247841073] [2023-11-06 21:14:14,465 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:14:14,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864142531] [2023-11-06 21:14:14,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864142531] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:14:14,466 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 21:14:14,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2023-11-06 21:14:14,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640288929] [2023-11-06 21:14:14,466 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 21:14:14,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 21:14:14,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:14:14,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 21:14:14,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2023-11-06 21:14:14,468 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:14,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:14:14,682 INFO L93 Difference]: Finished difference Result 96 states and 117 transitions. [2023-11-06 21:14:14,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 21:14:14,683 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-11-06 21:14:14,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:14:14,687 INFO L225 Difference]: With dead ends: 96 [2023-11-06 21:14:14,687 INFO L226 Difference]: Without dead ends: 71 [2023-11-06 21:14:14,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=151, Invalid=191, Unknown=0, NotChecked=0, Total=342 [2023-11-06 21:14:14,695 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 127 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:14:14,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 52 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 21:14:14,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-11-06 21:14:14,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 52. [2023-11-06 21:14:14,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.2549019607843137) internal successors, (64), 51 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:14,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 64 transitions. [2023-11-06 21:14:14,715 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 64 transitions. Word has length 15 [2023-11-06 21:14:14,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:14:14,716 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 64 transitions. [2023-11-06 21:14:14,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:14,716 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 64 transitions. [2023-11-06 21:14:14,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-06 21:14:14,717 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:14:14,718 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:14:14,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3050dc7d-2d28-4be0-bbb2-4d51c96cb4bd/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 21:14:14,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3050dc7d-2d28-4be0-bbb2-4d51c96cb4bd/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:14:14,924 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:14:14,924 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:14:14,925 INFO L85 PathProgramCache]: Analyzing trace with hash -65580756, now seen corresponding path program 3 times [2023-11-06 21:14:14,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:14:14,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808864123] [2023-11-06 21:14:14,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:14:14,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:14:14,942 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:14:14,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [839405911] [2023-11-06 21:14:14,942 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 21:14:14,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:14:14,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3050dc7d-2d28-4be0-bbb2-4d51c96cb4bd/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:14:14,944 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3050dc7d-2d28-4be0-bbb2-4d51c96cb4bd/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:14:14,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3050dc7d-2d28-4be0-bbb2-4d51c96cb4bd/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 21:14:15,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 21:14:15,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:14:15,016 INFO L262 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 21:14:15,018 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:14:15,099 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-06 21:14:15,099 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:14:15,154 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-06 21:14:15,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:14:15,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808864123] [2023-11-06 21:14:15,155 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:14:15,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839405911] [2023-11-06 21:14:15,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839405911] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:14:15,155 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 21:14:15,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2023-11-06 21:14:15,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300068265] [2023-11-06 21:14:15,155 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 21:14:15,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 21:14:15,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:14:15,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 21:14:15,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-06 21:14:15,158 INFO L87 Difference]: Start difference. First operand 52 states and 64 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:15,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:14:15,218 INFO L93 Difference]: Finished difference Result 127 states and 155 transitions. [2023-11-06 21:14:15,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 21:14:15,218 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-11-06 21:14:15,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:14:15,221 INFO L225 Difference]: With dead ends: 127 [2023-11-06 21:14:15,221 INFO L226 Difference]: Without dead ends: 91 [2023-11-06 21:14:15,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-06 21:14:15,223 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 12 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:14:15,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 21 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:14:15,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-11-06 21:14:15,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2023-11-06 21:14:15,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1777777777777778) internal successors, (106), 90 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:15,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2023-11-06 21:14:15,245 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 21 [2023-11-06 21:14:15,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:14:15,246 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2023-11-06 21:14:15,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:15,246 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2023-11-06 21:14:15,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-11-06 21:14:15,248 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:14:15,248 INFO L195 NwaCegarLoop]: trace histogram [40, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:14:15,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3050dc7d-2d28-4be0-bbb2-4d51c96cb4bd/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 21:14:15,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3050dc7d-2d28-4be0-bbb2-4d51c96cb4bd/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:14:15,455 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:14:15,455 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:14:15,455 INFO L85 PathProgramCache]: Analyzing trace with hash 401362305, now seen corresponding path program 4 times [2023-11-06 21:14:15,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:14:15,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71970391] [2023-11-06 21:14:15,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:14:15,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:14:15,523 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:14:15,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [43514457] [2023-11-06 21:14:15,523 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 21:14:15,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:14:15,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3050dc7d-2d28-4be0-bbb2-4d51c96cb4bd/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:14:15,525 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3050dc7d-2d28-4be0-bbb2-4d51c96cb4bd/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:14:15,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3050dc7d-2d28-4be0-bbb2-4d51c96cb4bd/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 21:14:26,910 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 21:14:26,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:14:26,924 INFO L262 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 21:14:26,927 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:14:27,227 INFO L134 CoverageAnalysis]: Checked inductivity of 962 backedges. 370 proven. 55 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2023-11-06 21:14:27,228 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:14:27,555 INFO L134 CoverageAnalysis]: Checked inductivity of 962 backedges. 7 proven. 418 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2023-11-06 21:14:27,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:14:27,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71970391] [2023-11-06 21:14:27,555 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:14:27,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43514457] [2023-11-06 21:14:27,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43514457] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:14:27,556 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 21:14:27,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2023-11-06 21:14:27,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016166135] [2023-11-06 21:14:27,556 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 21:14:27,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-06 21:14:27,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:14:27,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-06 21:14:27,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=347, Unknown=0, NotChecked=0, Total=650 [2023-11-06 21:14:27,559 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:28,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:14:28,132 INFO L93 Difference]: Finished difference Result 295 states and 375 transitions. [2023-11-06 21:14:28,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-06 21:14:28,132 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2023-11-06 21:14:28,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:14:28,137 INFO L225 Difference]: With dead ends: 295 [2023-11-06 21:14:28,137 INFO L226 Difference]: Without dead ends: 218 [2023-11-06 21:14:28,140 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=589, Invalid=743, Unknown=0, NotChecked=0, Total=1332 [2023-11-06 21:14:28,141 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 408 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 408 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 21:14:28,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [408 Valid, 84 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 21:14:28,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2023-11-06 21:14:28,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 175. [2023-11-06 21:14:28,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.160919540229885) internal successors, (202), 174 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:28,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 202 transitions. [2023-11-06 21:14:28,196 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 202 transitions. Word has length 60 [2023-11-06 21:14:28,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:14:28,197 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 202 transitions. [2023-11-06 21:14:28,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:14:28,197 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 202 transitions. [2023-11-06 21:14:28,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-11-06 21:14:28,201 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:14:28,201 INFO L195 NwaCegarLoop]: trace histogram [88, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:14:28,224 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3050dc7d-2d28-4be0-bbb2-4d51c96cb4bd/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-06 21:14:28,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3050dc7d-2d28-4be0-bbb2-4d51c96cb4bd/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:14:28,402 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:14:28,403 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:14:28,403 INFO L85 PathProgramCache]: Analyzing trace with hash 114966145, now seen corresponding path program 5 times [2023-11-06 21:14:28,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:14:28,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936469737] [2023-11-06 21:14:28,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:14:28,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:14:28,464 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:14:28,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1931728587] [2023-11-06 21:14:28,464 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 21:14:28,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:14:28,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3050dc7d-2d28-4be0-bbb2-4d51c96cb4bd/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:14:28,466 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3050dc7d-2d28-4be0-bbb2-4d51c96cb4bd/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:14:28,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3050dc7d-2d28-4be0-bbb2-4d51c96cb4bd/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process