./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-crafted/xor5.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/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_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-crafted/xor5.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/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_d77f4dc4-e42e-4d79-a65f-d202e527b755/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 a4ee2cdc1f0cbbd62309a70b71e98ce771ffa71f4ebd85e731799a93fbbc3919 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 21:55:45,007 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 21:55:45,085 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 21:55:45,090 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 21:55:45,091 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 21:55:45,118 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 21:55:45,119 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 21:55:45,119 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 21:55:45,120 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 21:55:45,121 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 21:55:45,122 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 21:55:45,122 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 21:55:45,123 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 21:55:45,124 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 21:55:45,124 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 21:55:45,125 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 21:55:45,125 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 21:55:45,126 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 21:55:45,126 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 21:55:45,127 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 21:55:45,127 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 21:55:45,128 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 21:55:45,128 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 21:55:45,129 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 21:55:45,129 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 21:55:45,130 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 21:55:45,130 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 21:55:45,131 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 21:55:45,131 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:55:45,132 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 21:55:45,133 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 21:55:45,133 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 21:55:45,134 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 21:55:45,134 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 21:55:45,135 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 21:55:45,135 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 21:55:45,136 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 21:55:45,136 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 21:55:45,137 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 21:55:45,137 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_d77f4dc4-e42e-4d79-a65f-d202e527b755/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a4ee2cdc1f0cbbd62309a70b71e98ce771ffa71f4ebd85e731799a93fbbc3919 [2023-11-06 21:55:45,451 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 21:55:45,487 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 21:55:45,490 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 21:55:45,493 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 21:55:45,493 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 21:55:45,495 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/array-crafted/xor5.i [2023-11-06 21:55:48,643 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 21:55:48,889 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 21:55:48,890 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/sv-benchmarks/c/array-crafted/xor5.i [2023-11-06 21:55:48,898 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/data/c14434fea/f10e2b06347b4bd18a903e57278d0219/FLAGece87fe23 [2023-11-06 21:55:48,914 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/data/c14434fea/f10e2b06347b4bd18a903e57278d0219 [2023-11-06 21:55:48,917 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 21:55:48,919 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 21:55:48,921 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 21:55:48,921 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 21:55:48,930 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 21:55:48,931 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:55:48" (1/1) ... [2023-11-06 21:55:48,935 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@305c7a43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:55:48, skipping insertion in model container [2023-11-06 21:55:48,937 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:55:48" (1/1) ... [2023-11-06 21:55:48,966 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 21:55:49,156 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_d77f4dc4-e42e-4d79-a65f-d202e527b755/sv-benchmarks/c/array-crafted/xor5.i[1364,1377] [2023-11-06 21:55:49,161 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:55:49,172 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 21:55:49,196 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_d77f4dc4-e42e-4d79-a65f-d202e527b755/sv-benchmarks/c/array-crafted/xor5.i[1364,1377] [2023-11-06 21:55:49,198 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:55:49,213 INFO L206 MainTranslator]: Completed translation [2023-11-06 21:55:49,214 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:55:49 WrapperNode [2023-11-06 21:55:49,214 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 21:55:49,215 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 21:55:49,216 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 21:55:49,216 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 21:55:49,224 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:55:49" (1/1) ... [2023-11-06 21:55:49,233 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:55:49" (1/1) ... [2023-11-06 21:55:49,274 INFO L138 Inliner]: procedures = 16, calls = 29, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 81 [2023-11-06 21:55:49,274 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 21:55:49,275 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 21:55:49,276 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 21:55:49,277 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 21:55:49,287 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:55:49" (1/1) ... [2023-11-06 21:55:49,288 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:55:49" (1/1) ... [2023-11-06 21:55:49,297 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:55:49" (1/1) ... [2023-11-06 21:55:49,298 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:55:49" (1/1) ... [2023-11-06 21:55:49,314 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:55:49" (1/1) ... [2023-11-06 21:55:49,332 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:55:49" (1/1) ... [2023-11-06 21:55:49,333 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:55:49" (1/1) ... [2023-11-06 21:55:49,335 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:55:49" (1/1) ... [2023-11-06 21:55:49,346 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 21:55:49,347 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 21:55:49,347 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 21:55:49,348 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 21:55:49,348 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:55:49" (1/1) ... [2023-11-06 21:55:49,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:55:49,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:55:49,389 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 21:55:49,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 21:55:49,435 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 21:55:49,435 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 21:55:49,435 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 21:55:49,436 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 21:55:49,436 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 21:55:49,436 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 21:55:49,436 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 21:55:49,436 INFO L130 BoogieDeclarations]: Found specification of procedure xor [2023-11-06 21:55:49,437 INFO L138 BoogieDeclarations]: Found implementation of procedure xor [2023-11-06 21:55:49,437 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 21:55:49,520 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 21:55:49,522 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 21:55:49,732 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 21:55:49,739 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 21:55:49,740 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-06 21:55:49,742 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:55:49 BoogieIcfgContainer [2023-11-06 21:55:49,742 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 21:55:49,745 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 21:55:49,746 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 21:55:49,749 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 21:55:49,750 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 09:55:48" (1/3) ... [2023-11-06 21:55:49,751 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ae72d90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:55:49, skipping insertion in model container [2023-11-06 21:55:49,751 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:55:49" (2/3) ... [2023-11-06 21:55:49,751 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ae72d90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:55:49, skipping insertion in model container [2023-11-06 21:55:49,752 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:55:49" (3/3) ... [2023-11-06 21:55:49,753 INFO L112 eAbstractionObserver]: Analyzing ICFG xor5.i [2023-11-06 21:55:49,776 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 21:55:49,776 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 21:55:49,828 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 21:55:49,836 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;@4b6e284f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 21:55:49,836 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 21:55:49,842 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 28 states have internal predecessors, (39), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 21:55:49,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-06 21:55:49,851 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:55:49,852 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:55:49,853 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:55:49,857 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:55:49,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1999048195, now seen corresponding path program 1 times [2023-11-06 21:55:49,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:55:49,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811572550] [2023-11-06 21:55:49,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:55:49,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:55:50,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:55:50,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-06 21:55:50,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:55:50,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-06 21:55:50,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:55:50,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-06 21:55:50,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:55:50,178 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-06 21:55:50,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:55:50,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811572550] [2023-11-06 21:55:50,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811572550] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:55:50,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:55:50,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 21:55:50,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341373938] [2023-11-06 21:55:50,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:55:50,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 21:55:50,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:55:50,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 21:55:50,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 21:55:50,235 INFO L87 Difference]: Start difference. First operand has 33 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 28 states have internal predecessors, (39), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-06 21:55:50,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:55:50,263 INFO L93 Difference]: Finished difference Result 61 states and 85 transitions. [2023-11-06 21:55:50,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 21:55:50,265 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 30 [2023-11-06 21:55:50,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:55:50,271 INFO L225 Difference]: With dead ends: 61 [2023-11-06 21:55:50,271 INFO L226 Difference]: Without dead ends: 28 [2023-11-06 21:55:50,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 21:55:50,278 INFO L413 NwaCegarLoop]: 41 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, 41 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:55:50,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:55:50,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-11-06 21:55:50,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-11-06 21:55:50,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 21:55:50,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2023-11-06 21:55:50,332 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 30 [2023-11-06 21:55:50,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:55:50,335 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2023-11-06 21:55:50,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-06 21:55:50,337 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2023-11-06 21:55:50,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-06 21:55:50,342 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:55:50,342 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:55:50,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 21:55:50,343 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:55:50,348 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:55:50,348 INFO L85 PathProgramCache]: Analyzing trace with hash 72832570, now seen corresponding path program 1 times [2023-11-06 21:55:50,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:55:50,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880268036] [2023-11-06 21:55:50,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:55:50,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:55:50,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:55:50,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-06 21:55:50,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:55:50,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-06 21:55:50,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:55:50,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-06 21:55:50,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:55:50,618 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-06 21:55:50,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:55:50,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880268036] [2023-11-06 21:55:50,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880268036] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:55:50,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:55:50,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:55:50,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639271782] [2023-11-06 21:55:50,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:55:50,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:55:50,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:55:50,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:55:50,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:55:50,624 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-06 21:55:50,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:55:50,686 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2023-11-06 21:55:50,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:55:50,687 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 30 [2023-11-06 21:55:50,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:55:50,688 INFO L225 Difference]: With dead ends: 53 [2023-11-06 21:55:50,688 INFO L226 Difference]: Without dead ends: 30 [2023-11-06 21:55:50,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 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 21:55:50,691 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 1 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:55:50,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 56 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 21:55:50,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-11-06 21:55:50,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2023-11-06 21:55:50,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.25) internal successors, (30), 24 states have internal predecessors, (30), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 21:55:50,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2023-11-06 21:55:50,703 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 30 [2023-11-06 21:55:50,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:55:50,703 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2023-11-06 21:55:50,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-06 21:55:50,704 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2023-11-06 21:55:50,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-06 21:55:50,706 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:55:50,706 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:55:50,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 21:55:50,707 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:55:50,708 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:55:50,708 INFO L85 PathProgramCache]: Analyzing trace with hash -921677864, now seen corresponding path program 1 times [2023-11-06 21:55:50,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:55:50,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407984255] [2023-11-06 21:55:50,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:55:50,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:55:50,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:55:50,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-06 21:55:50,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:55:50,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-06 21:55:50,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:55:50,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-06 21:55:50,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:55:50,942 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-06 21:55:50,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:55:50,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407984255] [2023-11-06 21:55:50,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407984255] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:55:50,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488104140] [2023-11-06 21:55:50,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:55:50,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:55:50,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:55:50,960 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:55:50,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 21:55:51,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:55:51,127 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 21:55:51,135 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:55:51,289 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-06 21:55:51,292 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:55:51,388 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-06 21:55:51,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488104140] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:55:51,389 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:55:51,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2023-11-06 21:55:51,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883037408] [2023-11-06 21:55:51,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:55:51,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-06 21:55:51,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:55:51,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-06 21:55:51,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-11-06 21:55:51,393 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 2 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-06 21:55:51,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:55:51,595 INFO L93 Difference]: Finished difference Result 61 states and 82 transitions. [2023-11-06 21:55:51,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 21:55:51,596 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 2 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) Word has length 32 [2023-11-06 21:55:51,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:55:51,598 INFO L225 Difference]: With dead ends: 61 [2023-11-06 21:55:51,598 INFO L226 Difference]: Without dead ends: 38 [2023-11-06 21:55:51,599 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-11-06 21:55:51,601 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 46 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 21:55:51,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 116 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 21:55:51,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-11-06 21:55:51,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 32. [2023-11-06 21:55:51,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 states have internal predecessors, (33), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 21:55:51,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2023-11-06 21:55:51,611 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 32 [2023-11-06 21:55:51,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:55:51,611 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2023-11-06 21:55:51,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 2 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-06 21:55:51,612 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2023-11-06 21:55:51,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-06 21:55:51,614 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:55:51,614 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:55:51,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 21:55:51,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:55:51,825 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:55:51,825 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:55:51,826 INFO L85 PathProgramCache]: Analyzing trace with hash 990653137, now seen corresponding path program 1 times [2023-11-06 21:55:51,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:55:51,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361228928] [2023-11-06 21:55:51,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:55:51,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:55:51,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:55:52,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-06 21:55:52,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:55:52,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-06 21:55:52,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:55:52,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-11-06 21:55:52,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:55:52,091 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-06 21:55:52,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:55:52,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361228928] [2023-11-06 21:55:52,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361228928] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:55:52,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163666014] [2023-11-06 21:55:52,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:55:52,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:55:52,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:55:52,094 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:55:52,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 21:55:52,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:55:52,201 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 21:55:52,204 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:55:52,285 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-06 21:55:52,286 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:55:52,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163666014] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:55:52,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 21:55:52,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2023-11-06 21:55:52,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028047028] [2023-11-06 21:55:52,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:55:52,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:55:52,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:55:52,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:55:52,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-06 21:55:52,298 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-06 21:55:52,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:55:52,367 INFO L93 Difference]: Finished difference Result 51 states and 62 transitions. [2023-11-06 21:55:52,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 21:55:52,368 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 46 [2023-11-06 21:55:52,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:55:52,371 INFO L225 Difference]: With dead ends: 51 [2023-11-06 21:55:52,371 INFO L226 Difference]: Without dead ends: 34 [2023-11-06 21:55:52,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-06 21:55:52,376 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 17 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:55:52,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 44 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:55:52,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-11-06 21:55:52,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2023-11-06 21:55:52,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 21:55:52,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2023-11-06 21:55:52,389 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 46 [2023-11-06 21:55:52,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:55:52,392 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2023-11-06 21:55:52,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-06 21:55:52,392 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2023-11-06 21:55:52,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-11-06 21:55:52,395 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:55:52,395 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:55:52,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 21:55:52,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:55:52,601 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:55:52,601 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:55:52,601 INFO L85 PathProgramCache]: Analyzing trace with hash 182246063, now seen corresponding path program 1 times [2023-11-06 21:55:52,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:55:52,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246233952] [2023-11-06 21:55:52,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:55:52,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:55:52,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:55:55,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-06 21:55:55,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:55:55,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-06 21:55:55,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:55:55,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-06 21:55:55,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:55:56,352 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-06 21:55:56,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:55:56,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246233952] [2023-11-06 21:55:56,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246233952] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:55:56,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252448388] [2023-11-06 21:55:56,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:55:56,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:55:56,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:55:56,359 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:55:56,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 21:55:56,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:55:56,490 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 94 conjunts are in the unsatisfiable core [2023-11-06 21:55:56,498 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:55:56,636 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-06 21:55:57,318 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:55:57,319 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 43 [2023-11-06 21:55:58,296 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-06 21:55:58,296 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 10 [2023-11-06 21:55:58,354 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-06 21:55:59,023 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 21:55:59,025 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:55:59,753 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2023-11-06 21:55:59,759 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 44 [2023-11-06 21:55:59,794 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 41 [2023-11-06 21:55:59,804 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 48 [2023-11-06 21:56:02,290 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2023-11-06 21:56:02,299 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:56:02,300 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 37 [2023-11-06 21:56:02,465 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 29 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 21:56:02,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252448388] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:56:02,466 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:56:02,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 31, 29] total 77 [2023-11-06 21:56:02,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741482674] [2023-11-06 21:56:02,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:56:02,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2023-11-06 21:56:02,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:56:02,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2023-11-06 21:56:02,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=479, Invalid=5373, Unknown=0, NotChecked=0, Total=5852 [2023-11-06 21:56:02,475 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 77 states, 71 states have (on average 1.5211267605633803) internal successors, (108), 66 states have internal predecessors, (108), 8 states have call successors, (9), 4 states have call predecessors, (9), 8 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2023-11-06 21:56:21,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:56:21,623 INFO L93 Difference]: Finished difference Result 374 states and 528 transitions. [2023-11-06 21:56:21,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2023-11-06 21:56:21,625 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 71 states have (on average 1.5211267605633803) internal successors, (108), 66 states have internal predecessors, (108), 8 states have call successors, (9), 4 states have call predecessors, (9), 8 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 48 [2023-11-06 21:56:21,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:56:21,642 INFO L225 Difference]: With dead ends: 374 [2023-11-06 21:56:21,642 INFO L226 Difference]: Without dead ends: 368 [2023-11-06 21:56:21,665 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 47 SyntacticMatches, 4 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14241 ImplicationChecksByTransitivity, 18.1s TimeCoverageRelationStatistics Valid=4198, Invalid=38858, Unknown=0, NotChecked=0, Total=43056 [2023-11-06 21:56:21,667 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 688 mSDsluCounter, 794 mSDsCounter, 0 mSdLazyCounter, 4775 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 694 SdHoareTripleChecker+Valid, 826 SdHoareTripleChecker+Invalid, 4935 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 4775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:56:21,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [694 Valid, 826 Invalid, 4935 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [160 Valid, 4775 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2023-11-06 21:56:21,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2023-11-06 21:56:21,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 190. [2023-11-06 21:56:21,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 169 states have (on average 1.4437869822485208) internal successors, (244), 176 states have internal predecessors, (244), 11 states have call successors, (11), 3 states have call predecessors, (11), 9 states have return successors, (34), 10 states have call predecessors, (34), 11 states have call successors, (34) [2023-11-06 21:56:21,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 289 transitions. [2023-11-06 21:56:21,752 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 289 transitions. Word has length 48 [2023-11-06 21:56:21,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:56:21,754 INFO L495 AbstractCegarLoop]: Abstraction has 190 states and 289 transitions. [2023-11-06 21:56:21,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 71 states have (on average 1.5211267605633803) internal successors, (108), 66 states have internal predecessors, (108), 8 states have call successors, (9), 4 states have call predecessors, (9), 8 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2023-11-06 21:56:21,755 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 289 transitions. [2023-11-06 21:56:21,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-06 21:56:21,765 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:56:21,766 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:56:21,772 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 21:56:21,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:56:21,976 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:56:21,977 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:56:21,977 INFO L85 PathProgramCache]: Analyzing trace with hash 343309593, now seen corresponding path program 1 times [2023-11-06 21:56:21,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:56:21,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117871047] [2023-11-06 21:56:21,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:56:21,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:56:22,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:56:22,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-06 21:56:22,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:56:22,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-06 21:56:22,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:56:22,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-06 21:56:22,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:56:22,949 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-11-06 21:56:22,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:56:22,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117871047] [2023-11-06 21:56:22,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117871047] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:56:22,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393706531] [2023-11-06 21:56:22,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:56:22,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:56:22,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:56:22,951 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:56:22,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 21:56:23,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:56:23,046 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 49 conjunts are in the unsatisfiable core [2023-11-06 21:56:23,051 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:56:23,149 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:56:23,149 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2023-11-06 21:56:23,391 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-06 21:56:23,391 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 31 [2023-11-06 21:56:23,507 INFO L322 Elim1Store]: treesize reduction 64, result has 25.6 percent of original size [2023-11-06 21:56:23,508 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 42 [2023-11-06 21:56:29,963 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 21:56:29,964 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:56:30,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393706531] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:56:30,382 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 21:56:30,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 28 [2023-11-06 21:56:30,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717988758] [2023-11-06 21:56:30,383 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 21:56:30,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-06 21:56:30,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:56:30,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-06 21:56:30,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1011, Unknown=3, NotChecked=0, Total=1190 [2023-11-06 21:56:30,385 INFO L87 Difference]: Start difference. First operand 190 states and 289 transitions. Second operand has 28 states, 25 states have (on average 2.68) internal successors, (67), 23 states have internal predecessors, (67), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-06 21:56:33,016 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 21:56:33,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:56:33,926 INFO L93 Difference]: Finished difference Result 661 states and 968 transitions. [2023-11-06 21:56:33,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-06 21:56:33,927 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 2.68) internal successors, (67), 23 states have internal predecessors, (67), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) Word has length 49 [2023-11-06 21:56:33,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:56:33,932 INFO L225 Difference]: With dead ends: 661 [2023-11-06 21:56:33,932 INFO L226 Difference]: Without dead ends: 589 [2023-11-06 21:56:33,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=410, Invalid=2343, Unknown=3, NotChecked=0, Total=2756 [2023-11-06 21:56:33,935 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 163 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 51 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 516 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-11-06 21:56:33,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 516 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 516 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2023-11-06 21:56:33,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2023-11-06 21:56:34,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 415. [2023-11-06 21:56:34,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 375 states have (on average 1.4293333333333333) internal successors, (536), 386 states have internal predecessors, (536), 19 states have call successors, (19), 11 states have call predecessors, (19), 20 states have return successors, (60), 17 states have call predecessors, (60), 19 states have call successors, (60) [2023-11-06 21:56:34,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 615 transitions. [2023-11-06 21:56:34,010 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 615 transitions. Word has length 49 [2023-11-06 21:56:34,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:56:34,011 INFO L495 AbstractCegarLoop]: Abstraction has 415 states and 615 transitions. [2023-11-06 21:56:34,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 2.68) internal successors, (67), 23 states have internal predecessors, (67), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-06 21:56:34,011 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 615 transitions. [2023-11-06 21:56:34,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-06 21:56:34,015 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:56:34,015 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:56:34,025 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 21:56:34,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:56:34,233 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:56:34,234 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:56:34,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1203962725, now seen corresponding path program 2 times [2023-11-06 21:56:34,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:56:34,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783894796] [2023-11-06 21:56:34,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:56:34,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:56:34,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:56:36,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-06 21:56:36,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:56:37,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-06 21:56:37,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:56:37,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-11-06 21:56:37,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:56:38,012 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 21:56:38,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:56:38,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783894796] [2023-11-06 21:56:38,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783894796] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:56:38,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154635362] [2023-11-06 21:56:38,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 21:56:38,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:56:38,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:56:38,024 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:56:38,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 21:56:38,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 21:56:38,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:56:38,128 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 82 conjunts are in the unsatisfiable core [2023-11-06 21:56:38,133 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:56:38,157 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-06 21:56:38,748 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 33 [2023-11-06 21:56:39,397 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 54 [2023-11-06 21:56:39,691 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-06 21:56:40,202 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 76 [2023-11-06 21:56:40,401 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 21:56:40,401 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:56:41,002 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2023-11-06 21:56:41,005 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 44 [2023-11-06 21:56:41,040 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 41 [2023-11-06 21:56:41,045 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 48 [2023-11-06 21:56:42,894 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-06 21:56:42,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154635362] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:56:42,895 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:56:42,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 27, 26] total 74 [2023-11-06 21:56:42,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806916707] [2023-11-06 21:56:42,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:56:42,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2023-11-06 21:56:42,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:56:42,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2023-11-06 21:56:42,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=335, Invalid=5067, Unknown=0, NotChecked=0, Total=5402 [2023-11-06 21:56:42,899 INFO L87 Difference]: Start difference. First operand 415 states and 615 transitions. Second operand has 74 states, 68 states have (on average 1.7205882352941178) internal successors, (117), 66 states have internal predecessors, (117), 9 states have call successors, (9), 2 states have call predecessors, (9), 8 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-06 21:56:52,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:56:52,398 INFO L93 Difference]: Finished difference Result 1346 states and 2010 transitions. [2023-11-06 21:56:52,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2023-11-06 21:56:52,400 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 68 states have (on average 1.7205882352941178) internal successors, (117), 66 states have internal predecessors, (117), 9 states have call successors, (9), 2 states have call predecessors, (9), 8 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) Word has length 49 [2023-11-06 21:56:52,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:56:52,410 INFO L225 Difference]: With dead ends: 1346 [2023-11-06 21:56:52,411 INFO L226 Difference]: Without dead ends: 858 [2023-11-06 21:56:52,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4976 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=1475, Invalid=18265, Unknown=0, NotChecked=0, Total=19740 [2023-11-06 21:56:52,421 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 574 mSDsluCounter, 1057 mSDsCounter, 0 mSdLazyCounter, 3215 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 581 SdHoareTripleChecker+Valid, 1093 SdHoareTripleChecker+Invalid, 3344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 3215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:56:52,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [581 Valid, 1093 Invalid, 3344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 3215 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-11-06 21:56:52,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 858 states. [2023-11-06 21:56:52,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 858 to 515. [2023-11-06 21:56:52,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 473 states have (on average 1.4249471458773784) internal successors, (674), 485 states have internal predecessors, (674), 20 states have call successors, (20), 12 states have call predecessors, (20), 21 states have return successors, (61), 17 states have call predecessors, (61), 20 states have call successors, (61) [2023-11-06 21:56:52,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 755 transitions. [2023-11-06 21:56:52,558 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 755 transitions. Word has length 49 [2023-11-06 21:56:52,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:56:52,559 INFO L495 AbstractCegarLoop]: Abstraction has 515 states and 755 transitions. [2023-11-06 21:56:52,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 68 states have (on average 1.7205882352941178) internal successors, (117), 66 states have internal predecessors, (117), 9 states have call successors, (9), 2 states have call predecessors, (9), 8 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-06 21:56:52,559 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 755 transitions. [2023-11-06 21:56:52,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-06 21:56:52,562 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:56:52,562 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:56:52,573 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-06 21:56:52,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:56:52,768 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:56:52,768 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:56:52,769 INFO L85 PathProgramCache]: Analyzing trace with hash -113427575, now seen corresponding path program 3 times [2023-11-06 21:56:52,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:56:52,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916366365] [2023-11-06 21:56:52,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:56:52,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:56:52,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:56:53,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-06 21:56:53,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:56:53,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-06 21:56:53,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:56:53,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-11-06 21:56:53,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:56:53,486 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 21:56:53,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:56:53,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916366365] [2023-11-06 21:56:53,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916366365] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:56:53,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134964138] [2023-11-06 21:56:53,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 21:56:53,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:56:53,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:56:53,493 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:56:53,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 21:56:53,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-11-06 21:56:53,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:56:53,626 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-06 21:56:53,636 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:56:53,776 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:56:53,777 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2023-11-06 21:56:53,918 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 19 [2023-11-06 21:56:53,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:56:53,986 INFO L322 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2023-11-06 21:56:53,987 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 26 [2023-11-06 21:56:54,149 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-06 21:56:54,149 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:56:58,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134964138] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:56:58,416 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 21:56:58,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2023-11-06 21:56:58,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616149740] [2023-11-06 21:56:58,416 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 21:56:58,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-06 21:56:58,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:56:58,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-06 21:56:58,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=902, Unknown=2, NotChecked=0, Total=1056 [2023-11-06 21:56:58,418 INFO L87 Difference]: Start difference. First operand 515 states and 755 transitions. Second operand has 27 states, 26 states have (on average 2.9615384615384617) internal successors, (77), 24 states have internal predecessors, (77), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-06 21:57:00,431 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 21:57:02,473 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 21:57:04,476 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 21:57:06,493 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 21:57:08,496 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 21:57:10,541 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 21:57:12,546 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 21:57:14,563 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 21:57:16,571 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 21:57:18,812 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 21:57:20,815 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 21:57:22,844 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 21:57:24,865 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 21:57:26,868 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 21:57:28,910 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 21:57:31,275 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 21:57:34,285 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 21:57:36,287 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 21:57:38,384 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 21:57:40,386 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 21:57:42,418 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 21:57:44,422 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 21:57:46,446 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 21:57:49,352 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 21:57:51,392 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 21:57:53,396 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 21:57:55,405 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 21:57:57,453 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 21:57:59,481 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 21:57:59,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:57:59,597 INFO L93 Difference]: Finished difference Result 912 states and 1299 transitions. [2023-11-06 21:57:59,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-11-06 21:57:59,597 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.9615384615384617) internal successors, (77), 24 states have internal predecessors, (77), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) Word has length 49 [2023-11-06 21:57:59,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:57:59,603 INFO L225 Difference]: With dead ends: 912 [2023-11-06 21:57:59,603 INFO L226 Difference]: Without dead ends: 795 [2023-11-06 21:57:59,605 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 831 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=413, Invalid=2555, Unknown=2, NotChecked=0, Total=2970 [2023-11-06 21:57:59,606 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 147 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 40 mSolverCounterUnsat, 31 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 60.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 31 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 60.5s IncrementalHoareTripleChecker+Time [2023-11-06 21:57:59,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 438 Invalid, 786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 715 Invalid, 31 Unknown, 0 Unchecked, 60.5s Time] [2023-11-06 21:57:59,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2023-11-06 21:57:59,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 634. [2023-11-06 21:57:59,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 634 states, 584 states have (on average 1.428082191780822) internal successors, (834), 599 states have internal predecessors, (834), 23 states have call successors, (23), 17 states have call predecessors, (23), 26 states have return successors, (50), 17 states have call predecessors, (50), 23 states have call successors, (50) [2023-11-06 21:57:59,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 907 transitions. [2023-11-06 21:57:59,708 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 907 transitions. Word has length 49 [2023-11-06 21:57:59,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:57:59,709 INFO L495 AbstractCegarLoop]: Abstraction has 634 states and 907 transitions. [2023-11-06 21:57:59,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.9615384615384617) internal successors, (77), 24 states have internal predecessors, (77), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-06 21:57:59,709 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 907 transitions. [2023-11-06 21:57:59,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-06 21:57:59,712 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:57:59,713 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:57:59,724 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 21:57:59,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-06 21:57:59,920 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:57:59,920 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:57:59,920 INFO L85 PathProgramCache]: Analyzing trace with hash -232638593, now seen corresponding path program 4 times [2023-11-06 21:57:59,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:57:59,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986104466] [2023-11-06 21:57:59,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:59,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:57:59,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:02,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-06 21:58:02,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:02,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-06 21:58:02,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:03,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-11-06 21:58:03,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:03,659 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 26 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 21:58:03,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:03,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986104466] [2023-11-06 21:58:03,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986104466] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:58:03,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139605801] [2023-11-06 21:58:03,660 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 21:58:03,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:58:03,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:58:03,662 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:58:03,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 21:58:03,781 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 21:58:03,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:58:03,784 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 89 conjunts are in the unsatisfiable core [2023-11-06 21:58:03,788 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:58:04,475 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:58:04,480 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 40 [2023-11-06 21:58:06,027 INFO L322 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2023-11-06 21:58:06,027 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 124 treesize of output 93 [2023-11-06 21:58:06,501 INFO L322 Elim1Store]: treesize reduction 40, result has 49.4 percent of original size [2023-11-06 21:58:06,501 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 128 treesize of output 110 [2023-11-06 21:58:07,161 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 132 treesize of output 80 [2023-11-06 21:58:07,410 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 33 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-06 21:58:07,411 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:58:10,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139605801] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:58:10,419 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 21:58:10,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 27] total 55 [2023-11-06 21:58:10,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296310635] [2023-11-06 21:58:10,419 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 21:58:10,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2023-11-06 21:58:10,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:10,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2023-11-06 21:58:10,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=3647, Unknown=0, NotChecked=0, Total=3906 [2023-11-06 21:58:10,422 INFO L87 Difference]: Start difference. First operand 634 states and 907 transitions. Second operand has 55 states, 51 states have (on average 1.6274509803921569) internal successors, (83), 48 states have internal predecessors, (83), 6 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-06 21:58:17,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:58:17,354 INFO L93 Difference]: Finished difference Result 1488 states and 2093 transitions. [2023-11-06 21:58:17,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2023-11-06 21:58:17,355 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 51 states have (on average 1.6274509803921569) internal successors, (83), 48 states have internal predecessors, (83), 6 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 50 [2023-11-06 21:58:17,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:58:17,366 INFO L225 Difference]: With dead ends: 1488 [2023-11-06 21:58:17,366 INFO L226 Difference]: Without dead ends: 1316 [2023-11-06 21:58:17,369 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3900 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=1047, Invalid=12525, Unknown=0, NotChecked=0, Total=13572 [2023-11-06 21:58:17,372 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 386 mSDsluCounter, 615 mSDsCounter, 0 mSdLazyCounter, 2044 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 398 SdHoareTripleChecker+Valid, 655 SdHoareTripleChecker+Invalid, 2140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 2044 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-11-06 21:58:17,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [398 Valid, 655 Invalid, 2140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 2044 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-11-06 21:58:17,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1316 states. [2023-11-06 21:58:17,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1316 to 890. [2023-11-06 21:58:17,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 890 states, 815 states have (on average 1.4184049079754601) internal successors, (1156), 844 states have internal predecessors, (1156), 32 states have call successors, (32), 20 states have call predecessors, (32), 42 states have return successors, (93), 25 states have call predecessors, (93), 32 states have call successors, (93) [2023-11-06 21:58:17,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 1281 transitions. [2023-11-06 21:58:17,544 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 1281 transitions. Word has length 50 [2023-11-06 21:58:17,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:58:17,544 INFO L495 AbstractCegarLoop]: Abstraction has 890 states and 1281 transitions. [2023-11-06 21:58:17,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 51 states have (on average 1.6274509803921569) internal successors, (83), 48 states have internal predecessors, (83), 6 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-06 21:58:17,545 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 1281 transitions. [2023-11-06 21:58:17,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-06 21:58:17,549 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:58:17,549 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:58:17,560 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 21:58:17,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-06 21:58:17,756 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:58:17,756 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:17,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1177425715, now seen corresponding path program 2 times [2023-11-06 21:58:17,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:17,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192988045] [2023-11-06 21:58:17,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:17,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:17,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:17,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-06 21:58:17,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:17,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-11-06 21:58:17,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:17,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-11-06 21:58:17,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:17,873 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-06 21:58:17,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:17,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192988045] [2023-11-06 21:58:17,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192988045] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:58:17,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278054509] [2023-11-06 21:58:17,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 21:58:17,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:58:17,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:58:17,876 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:58:17,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 21:58:17,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 21:58:17,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:58:17,992 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 21:58:17,995 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:58:18,058 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-06 21:58:18,059 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:58:18,170 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-06 21:58:18,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278054509] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:58:18,170 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:58:18,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 14 [2023-11-06 21:58:18,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582491790] [2023-11-06 21:58:18,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:58:18,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 21:58:18,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:18,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 21:58:18,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2023-11-06 21:58:18,172 INFO L87 Difference]: Start difference. First operand 890 states and 1281 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-06 21:58:18,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:58:18,547 INFO L93 Difference]: Finished difference Result 1934 states and 2784 transitions. [2023-11-06 21:58:18,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-06 21:58:18,548 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 50 [2023-11-06 21:58:18,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:58:18,558 INFO L225 Difference]: With dead ends: 1934 [2023-11-06 21:58:18,558 INFO L226 Difference]: Without dead ends: 1573 [2023-11-06 21:58:18,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 97 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2023-11-06 21:58:18,560 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 124 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:58:18,562 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 287 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 21:58:18,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1573 states. [2023-11-06 21:58:18,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1573 to 1166. [2023-11-06 21:58:18,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1166 states, 1078 states have (on average 1.4192949907235621) internal successors, (1530), 1113 states have internal predecessors, (1530), 37 states have call successors, (37), 23 states have call predecessors, (37), 50 states have return successors, (128), 29 states have call predecessors, (128), 37 states have call successors, (128) [2023-11-06 21:58:18,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1166 states to 1166 states and 1695 transitions. [2023-11-06 21:58:18,782 INFO L78 Accepts]: Start accepts. Automaton has 1166 states and 1695 transitions. Word has length 50 [2023-11-06 21:58:18,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:58:18,782 INFO L495 AbstractCegarLoop]: Abstraction has 1166 states and 1695 transitions. [2023-11-06 21:58:18,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-06 21:58:18,783 INFO L276 IsEmpty]: Start isEmpty. Operand 1166 states and 1695 transitions. [2023-11-06 21:58:18,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-06 21:58:18,787 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:58:18,788 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:58:18,798 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 21:58:18,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 21:58:18,994 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:58:18,994 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:18,994 INFO L85 PathProgramCache]: Analyzing trace with hash -615780380, now seen corresponding path program 1 times [2023-11-06 21:58:18,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:18,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035571373] [2023-11-06 21:58:18,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:18,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:19,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:19,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-06 21:58:19,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:19,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-06 21:58:19,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:19,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-11-06 21:58:19,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:20,163 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-06 21:58:20,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:20,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035571373] [2023-11-06 21:58:20,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035571373] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:58:20,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377525815] [2023-11-06 21:58:20,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:20,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:58:20,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:58:20,169 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:58:20,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 21:58:20,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:20,274 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-06 21:58:20,276 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:58:20,437 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 21:58:20,560 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-11-06 21:58:20,611 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-06 21:58:20,919 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 21:58:20,919 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:58:21,114 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2023-11-06 21:58:21,116 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2023-11-06 21:58:21,366 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2023-11-06 21:58:21,491 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 14 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-06 21:58:21,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377525815] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:58:21,491 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:58:21,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17, 15] total 47 [2023-11-06 21:58:21,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542903676] [2023-11-06 21:58:21,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:58:21,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-11-06 21:58:21,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:21,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-11-06 21:58:21,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=1925, Unknown=0, NotChecked=0, Total=2162 [2023-11-06 21:58:21,495 INFO L87 Difference]: Start difference. First operand 1166 states and 1695 transitions. Second operand has 47 states, 42 states have (on average 2.9047619047619047) internal successors, (122), 42 states have internal predecessors, (122), 7 states have call successors, (9), 3 states have call predecessors, (9), 9 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2023-11-06 21:58:26,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:58:26,326 INFO L93 Difference]: Finished difference Result 2070 states and 2960 transitions. [2023-11-06 21:58:26,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2023-11-06 21:58:26,327 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 42 states have (on average 2.9047619047619047) internal successors, (122), 42 states have internal predecessors, (122), 7 states have call successors, (9), 3 states have call predecessors, (9), 9 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 51 [2023-11-06 21:58:26,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:58:26,336 INFO L225 Difference]: With dead ends: 2070 [2023-11-06 21:58:26,336 INFO L226 Difference]: Without dead ends: 1453 [2023-11-06 21:58:26,342 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5424 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=2052, Invalid=14718, Unknown=0, NotChecked=0, Total=16770 [2023-11-06 21:58:26,343 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 508 mSDsluCounter, 1103 mSDsCounter, 0 mSdLazyCounter, 1941 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 512 SdHoareTripleChecker+Valid, 1193 SdHoareTripleChecker+Invalid, 2093 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 1941 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-06 21:58:26,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [512 Valid, 1193 Invalid, 2093 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 1941 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-06 21:58:26,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1453 states. [2023-11-06 21:58:26,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1453 to 820. [2023-11-06 21:58:26,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 820 states, 753 states have (on average 1.3930942895086322) internal successors, (1049), 775 states have internal predecessors, (1049), 26 states have call successors, (26), 20 states have call predecessors, (26), 40 states have return successors, (70), 24 states have call predecessors, (70), 26 states have call successors, (70) [2023-11-06 21:58:26,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 1145 transitions. [2023-11-06 21:58:26,541 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 1145 transitions. Word has length 51 [2023-11-06 21:58:26,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:58:26,542 INFO L495 AbstractCegarLoop]: Abstraction has 820 states and 1145 transitions. [2023-11-06 21:58:26,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 42 states have (on average 2.9047619047619047) internal successors, (122), 42 states have internal predecessors, (122), 7 states have call successors, (9), 3 states have call predecessors, (9), 9 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2023-11-06 21:58:26,543 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 1145 transitions. [2023-11-06 21:58:26,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-11-06 21:58:26,546 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:58:26,546 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:58:26,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 21:58:26,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-06 21:58:26,752 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:58:26,752 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:26,752 INFO L85 PathProgramCache]: Analyzing trace with hash 54740714, now seen corresponding path program 3 times [2023-11-06 21:58:26,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:26,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117246297] [2023-11-06 21:58:26,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:26,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:26,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:26,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-06 21:58:26,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:26,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-11-06 21:58:26,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:26,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-11-06 21:58:26,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:26,881 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 39 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-06 21:58:26,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:26,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117246297] [2023-11-06 21:58:26,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117246297] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:58:26,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13797115] [2023-11-06 21:58:26,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 21:58:26,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:58:26,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:58:26,884 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:58:26,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 21:58:27,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-11-06 21:58:27,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:58:27,079 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 21:58:27,081 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:58:27,166 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-06 21:58:27,166 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:58:27,317 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 11 proven. 36 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-06 21:58:27,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13797115] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:58:27,317 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:58:27,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 8] total 13 [2023-11-06 21:58:27,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032338169] [2023-11-06 21:58:27,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:58:27,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 21:58:27,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:27,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 21:58:27,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2023-11-06 21:58:27,319 INFO L87 Difference]: Start difference. First operand 820 states and 1145 transitions. Second operand has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 4 states have call successors, (8) [2023-11-06 21:58:27,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:58:27,575 INFO L93 Difference]: Finished difference Result 1001 states and 1373 transitions. [2023-11-06 21:58:27,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-06 21:58:27,576 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 4 states have call successors, (8) Word has length 52 [2023-11-06 21:58:27,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:58:27,578 INFO L225 Difference]: With dead ends: 1001 [2023-11-06 21:58:27,579 INFO L226 Difference]: Without dead ends: 392 [2023-11-06 21:58:27,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 106 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2023-11-06 21:58:27,581 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 99 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:58:27,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 316 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 21:58:27,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2023-11-06 21:58:27,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 289. [2023-11-06 21:58:27,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 268 states have (on average 1.3395522388059702) internal successors, (359), 271 states have internal predecessors, (359), 10 states have call successors, (10), 9 states have call predecessors, (10), 10 states have return successors, (13), 8 states have call predecessors, (13), 10 states have call successors, (13) [2023-11-06 21:58:27,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 382 transitions. [2023-11-06 21:58:27,638 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 382 transitions. Word has length 52 [2023-11-06 21:58:27,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:58:27,638 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 382 transitions. [2023-11-06 21:58:27,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 4 states have call successors, (8) [2023-11-06 21:58:27,639 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 382 transitions. [2023-11-06 21:58:27,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-11-06 21:58:27,640 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:58:27,640 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:58:27,646 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-06 21:58:27,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-06 21:58:27,846 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:58:27,846 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:27,847 INFO L85 PathProgramCache]: Analyzing trace with hash 993629914, now seen corresponding path program 1 times [2023-11-06 21:58:27,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:27,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014943882] [2023-11-06 21:58:27,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:27,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:27,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:28,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-06 21:58:28,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:28,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-06 21:58:28,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:28,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-11-06 21:58:28,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:28,217 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-06 21:58:28,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:28,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014943882] [2023-11-06 21:58:28,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014943882] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:58:28,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377114551] [2023-11-06 21:58:28,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:28,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:58:28,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:58:28,220 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:58:28,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 21:58:28,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:28,328 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-06 21:58:28,351 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:58:28,398 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-06 21:58:28,483 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 11 [2023-11-06 21:58:28,639 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 25 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 21:58:28,639 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:58:28,914 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 33 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-06 21:58:28,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377114551] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:58:28,915 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:58:28,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 10] total 27 [2023-11-06 21:58:28,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348505451] [2023-11-06 21:58:28,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:58:28,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-06 21:58:28,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:28,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-06 21:58:28,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2023-11-06 21:58:28,917 INFO L87 Difference]: Start difference. First operand 289 states and 382 transitions. Second operand has 27 states, 25 states have (on average 3.84) internal successors, (96), 24 states have internal predecessors, (96), 5 states have call successors, (7), 3 states have call predecessors, (7), 7 states have return successors, (8), 3 states have call predecessors, (8), 5 states have call successors, (8) [2023-11-06 21:58:29,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:58:29,989 INFO L93 Difference]: Finished difference Result 572 states and 747 transitions. [2023-11-06 21:58:29,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-06 21:58:29,990 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 3.84) internal successors, (96), 24 states have internal predecessors, (96), 5 states have call successors, (7), 3 states have call predecessors, (7), 7 states have return successors, (8), 3 states have call predecessors, (8), 5 states have call successors, (8) Word has length 52 [2023-11-06 21:58:29,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:58:29,992 INFO L225 Difference]: With dead ends: 572 [2023-11-06 21:58:29,993 INFO L226 Difference]: Without dead ends: 410 [2023-11-06 21:58:29,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=471, Invalid=2079, Unknown=0, NotChecked=0, Total=2550 [2023-11-06 21:58:29,994 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 136 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 754 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 491 SdHoareTripleChecker+Invalid, 763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 21:58:29,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 491 Invalid, 763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 754 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 21:58:29,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2023-11-06 21:58:30,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 330. [2023-11-06 21:58:30,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 306 states have (on average 1.34640522875817) internal successors, (412), 310 states have internal predecessors, (412), 11 states have call successors, (11), 10 states have call predecessors, (11), 12 states have return successors, (16), 9 states have call predecessors, (16), 11 states have call successors, (16) [2023-11-06 21:58:30,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 439 transitions. [2023-11-06 21:58:30,059 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 439 transitions. Word has length 52 [2023-11-06 21:58:30,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:58:30,059 INFO L495 AbstractCegarLoop]: Abstraction has 330 states and 439 transitions. [2023-11-06 21:58:30,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 3.84) internal successors, (96), 24 states have internal predecessors, (96), 5 states have call successors, (7), 3 states have call predecessors, (7), 7 states have return successors, (8), 3 states have call predecessors, (8), 5 states have call successors, (8) [2023-11-06 21:58:30,060 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 439 transitions. [2023-11-06 21:58:30,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-06 21:58:30,061 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:58:30,061 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:58:30,067 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 21:58:30,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-06 21:58:30,268 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:58:30,268 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:30,268 INFO L85 PathProgramCache]: Analyzing trace with hash 997117689, now seen corresponding path program 2 times [2023-11-06 21:58:30,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:30,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141867627] [2023-11-06 21:58:30,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:30,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:30,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:30,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-06 21:58:30,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:30,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-11-06 21:58:30,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:30,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-11-06 21:58:30,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:30,772 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 23 proven. 17 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-06 21:58:30,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:30,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141867627] [2023-11-06 21:58:30,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141867627] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:58:30,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176152464] [2023-11-06 21:58:30,773 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 21:58:30,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:58:30,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:58:30,777 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:58:30,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 21:58:30,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 21:58:30,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:58:30,896 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 54 conjunts are in the unsatisfiable core [2023-11-06 21:58:30,899 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:58:30,951 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-06 21:58:31,154 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:58:31,154 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 22 [2023-11-06 21:58:31,353 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:58:31,353 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 25 [2023-11-06 21:58:31,435 INFO L322 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2023-11-06 21:58:31,435 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 33 [2023-11-06 21:58:31,861 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 15 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 21:58:31,862 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:58:36,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176152464] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:58:36,344 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 21:58:36,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 30 [2023-11-06 21:58:36,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147541446] [2023-11-06 21:58:36,345 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 21:58:36,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-06 21:58:36,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:36,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-06 21:58:36,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1239, Unknown=2, NotChecked=0, Total=1406 [2023-11-06 21:58:36,347 INFO L87 Difference]: Start difference. First operand 330 states and 439 transitions. Second operand has 30 states, 29 states have (on average 3.0689655172413794) internal successors, (89), 29 states have internal predecessors, (89), 4 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-06 21:58:38,385 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 21:58:40,425 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 21:58:42,455 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 21:58:44,469 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 21:58:46,933 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 21:58:49,132 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 21:58:51,394 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 21:58:53,451 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 21:58:54,996 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 21:58:57,052 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 21:58:58,481 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 21:58:58,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:58:58,545 INFO L93 Difference]: Finished difference Result 710 states and 921 transitions. [2023-11-06 21:58:58,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-06 21:58:58,546 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 3.0689655172413794) internal successors, (89), 29 states have internal predecessors, (89), 4 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 53 [2023-11-06 21:58:58,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:58:58,549 INFO L225 Difference]: With dead ends: 710 [2023-11-06 21:58:58,549 INFO L226 Difference]: Without dead ends: 541 [2023-11-06 21:58:58,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1042 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=456, Invalid=3202, Unknown=2, NotChecked=0, Total=3660 [2023-11-06 21:58:58,551 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 141 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 64 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.4s IncrementalHoareTripleChecker+Time [2023-11-06 21:58:58,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 373 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 568 Invalid, 11 Unknown, 0 Unchecked, 21.4s Time] [2023-11-06 21:58:58,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2023-11-06 21:58:58,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 454. [2023-11-06 21:58:58,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 417 states have (on average 1.3045563549160673) internal successors, (544), 425 states have internal predecessors, (544), 15 states have call successors, (15), 14 states have call predecessors, (15), 21 states have return successors, (26), 14 states have call predecessors, (26), 15 states have call successors, (26) [2023-11-06 21:58:58,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 585 transitions. [2023-11-06 21:58:58,641 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 585 transitions. Word has length 53 [2023-11-06 21:58:58,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:58:58,641 INFO L495 AbstractCegarLoop]: Abstraction has 454 states and 585 transitions. [2023-11-06 21:58:58,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 3.0689655172413794) internal successors, (89), 29 states have internal predecessors, (89), 4 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-06 21:58:58,642 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 585 transitions. [2023-11-06 21:58:58,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-06 21:58:58,643 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:58:58,644 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:58:58,650 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-06 21:58:58,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-06 21:58:58,850 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:58:58,850 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:58,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1148041302, now seen corresponding path program 1 times [2023-11-06 21:58:58,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:58,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389881210] [2023-11-06 21:58:58,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:58,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:58,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:59,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-06 21:58:59,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:59,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-11-06 21:58:59,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:59,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-11-06 21:58:59,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:59,305 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-11-06 21:58:59,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:59,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389881210] [2023-11-06 21:58:59,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389881210] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:58:59,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803437115] [2023-11-06 21:58:59,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:59,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:58:59,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:58:59,308 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:58:59,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 21:58:59,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:59,421 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-06 21:58:59,439 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:58:59,538 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-11-06 21:58:59,538 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:58:59,719 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-11-06 21:58:59,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803437115] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:58:59,719 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:58:59,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 15 [2023-11-06 21:58:59,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836556079] [2023-11-06 21:58:59,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:58:59,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-06 21:58:59,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:59,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-06 21:58:59,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2023-11-06 21:58:59,721 INFO L87 Difference]: Start difference. First operand 454 states and 585 transitions. Second operand has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 11 states have internal predecessors, (33), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-06 21:58:59,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:58:59,930 INFO L93 Difference]: Finished difference Result 1008 states and 1386 transitions. [2023-11-06 21:58:59,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-06 21:58:59,931 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 11 states have internal predecessors, (33), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 54 [2023-11-06 21:58:59,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:58:59,935 INFO L225 Difference]: With dead ends: 1008 [2023-11-06 21:58:59,935 INFO L226 Difference]: Without dead ends: 624 [2023-11-06 21:58:59,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2023-11-06 21:58:59,938 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 17 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:58:59,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 363 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 21:58:59,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2023-11-06 21:59:00,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 507. [2023-11-06 21:59:00,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 450 states have (on average 1.2422222222222221) internal successors, (559), 471 states have internal predecessors, (559), 23 states have call successors, (23), 13 states have call predecessors, (23), 33 states have return successors, (65), 22 states have call predecessors, (65), 23 states have call successors, (65) [2023-11-06 21:59:00,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 647 transitions. [2023-11-06 21:59:00,041 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 647 transitions. Word has length 54 [2023-11-06 21:59:00,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:59:00,042 INFO L495 AbstractCegarLoop]: Abstraction has 507 states and 647 transitions. [2023-11-06 21:59:00,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 11 states have internal predecessors, (33), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-06 21:59:00,042 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 647 transitions. [2023-11-06 21:59:00,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-06 21:59:00,044 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:59:00,045 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:59:00,060 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-06 21:59:00,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-06 21:59:00,251 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:59:00,251 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:59:00,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1775118696, now seen corresponding path program 1 times [2023-11-06 21:59:00,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:59:00,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550550517] [2023-11-06 21:59:00,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:59:00,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:59:00,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:59:00,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-06 21:59:00,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:59:00,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-11-06 21:59:00,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:59:01,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-11-06 21:59:01,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:59:01,162 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-06 21:59:01,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:59:01,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550550517] [2023-11-06 21:59:01,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550550517] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:59:01,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142604690] [2023-11-06 21:59:01,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:59:01,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:59:01,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:59:01,164 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:59:01,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-06 21:59:01,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:59:01,276 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 43 conjunts are in the unsatisfiable core [2023-11-06 21:59:01,279 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:59:01,322 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-06 21:59:01,475 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:59:01,476 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2023-11-06 21:59:01,668 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 31 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 21:59:01,668 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:59:01,970 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-06 21:59:01,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142604690] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:59:01,970 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:59:01,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 9] total 29 [2023-11-06 21:59:01,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059684092] [2023-11-06 21:59:01,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:59:01,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-06 21:59:01,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:59:01,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-06 21:59:01,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2023-11-06 21:59:01,972 INFO L87 Difference]: Start difference. First operand 507 states and 647 transitions. Second operand has 29 states, 29 states have (on average 3.689655172413793) internal successors, (107), 28 states have internal predecessors, (107), 7 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (8), 4 states have call predecessors, (8), 7 states have call successors, (8) [2023-11-06 21:59:02,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:59:02,766 INFO L93 Difference]: Finished difference Result 761 states and 969 transitions. [2023-11-06 21:59:02,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-06 21:59:02,767 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.689655172413793) internal successors, (107), 28 states have internal predecessors, (107), 7 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (8), 4 states have call predecessors, (8), 7 states have call successors, (8) Word has length 54 [2023-11-06 21:59:02,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:59:02,769 INFO L225 Difference]: With dead ends: 761 [2023-11-06 21:59:02,769 INFO L226 Difference]: Without dead ends: 542 [2023-11-06 21:59:02,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=231, Invalid=1251, Unknown=0, NotChecked=0, Total=1482 [2023-11-06 21:59:02,771 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 115 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 21:59:02,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 364 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 609 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 21:59:02,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2023-11-06 21:59:02,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 465. [2023-11-06 21:59:02,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 413 states have (on average 1.2445520581113803) internal successors, (514), 431 states have internal predecessors, (514), 22 states have call successors, (22), 12 states have call predecessors, (22), 29 states have return successors, (59), 21 states have call predecessors, (59), 22 states have call successors, (59) [2023-11-06 21:59:02,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 595 transitions. [2023-11-06 21:59:02,867 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 595 transitions. Word has length 54 [2023-11-06 21:59:02,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:59:02,867 INFO L495 AbstractCegarLoop]: Abstraction has 465 states and 595 transitions. [2023-11-06 21:59:02,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.689655172413793) internal successors, (107), 28 states have internal predecessors, (107), 7 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (8), 4 states have call predecessors, (8), 7 states have call successors, (8) [2023-11-06 21:59:02,868 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 595 transitions. [2023-11-06 21:59:02,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-06 21:59:02,869 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:59:02,870 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:59:02,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-06 21:59:03,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-06 21:59:03,076 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:59:03,076 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:59:03,076 INFO L85 PathProgramCache]: Analyzing trace with hash -596620566, now seen corresponding path program 2 times [2023-11-06 21:59:03,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:59:03,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038997108] [2023-11-06 21:59:03,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:59:03,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:59:03,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:59:03,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-06 21:59:03,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:59:03,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-11-06 21:59:03,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:59:03,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-11-06 21:59:03,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:59:04,096 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 16 proven. 27 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 21:59:04,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:59:04,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038997108] [2023-11-06 21:59:04,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038997108] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:59:04,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761349677] [2023-11-06 21:59:04,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 21:59:04,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:59:04,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:59:04,098 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:59:04,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-06 21:59:04,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 21:59:04,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:59:04,220 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 54 conjunts are in the unsatisfiable core [2023-11-06 21:59:04,222 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:59:04,263 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-06 21:59:04,450 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:59:04,450 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2023-11-06 21:59:04,622 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:59:04,622 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 22 [2023-11-06 21:59:04,700 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:59:04,701 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 19 [2023-11-06 21:59:04,951 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 21:59:04,951 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:59:05,656 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 110 [2023-11-06 21:59:05,668 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:59:05,669 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 634 treesize of output 522 [2023-11-06 21:59:05,798 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 14 proven. 29 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 21:59:05,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761349677] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:59:05,799 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:59:05,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19, 17] total 44 [2023-11-06 21:59:05,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368973498] [2023-11-06 21:59:05,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:59:05,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-11-06 21:59:05,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:59:05,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-11-06 21:59:05,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=1638, Unknown=0, NotChecked=0, Total=1892 [2023-11-06 21:59:05,801 INFO L87 Difference]: Start difference. First operand 465 states and 595 transitions. Second operand has 44 states, 42 states have (on average 2.8333333333333335) internal successors, (119), 42 states have internal predecessors, (119), 6 states have call successors, (9), 4 states have call predecessors, (9), 8 states have return successors, (9), 3 states have call predecessors, (9), 6 states have call successors, (9) [2023-11-06 21:59:07,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:59:07,486 INFO L93 Difference]: Finished difference Result 556 states and 701 transitions. [2023-11-06 21:59:07,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-06 21:59:07,487 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 42 states have (on average 2.8333333333333335) internal successors, (119), 42 states have internal predecessors, (119), 6 states have call successors, (9), 4 states have call predecessors, (9), 8 states have return successors, (9), 3 states have call predecessors, (9), 6 states have call successors, (9) Word has length 54 [2023-11-06 21:59:07,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:59:07,490 INFO L225 Difference]: With dead ends: 556 [2023-11-06 21:59:07,490 INFO L226 Difference]: Without dead ends: 546 [2023-11-06 21:59:07,492 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 87 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1162 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=504, Invalid=3036, Unknown=0, NotChecked=0, Total=3540 [2023-11-06 21:59:07,493 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 103 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 1085 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 1119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1085 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:59:07,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 531 Invalid, 1119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1085 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-06 21:59:07,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2023-11-06 21:59:07,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 465. [2023-11-06 21:59:07,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 413 states have (on average 1.242130750605327) internal successors, (513), 431 states have internal predecessors, (513), 22 states have call successors, (22), 12 states have call predecessors, (22), 29 states have return successors, (59), 21 states have call predecessors, (59), 22 states have call successors, (59) [2023-11-06 21:59:07,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 594 transitions. [2023-11-06 21:59:07,593 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 594 transitions. Word has length 54 [2023-11-06 21:59:07,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:59:07,594 INFO L495 AbstractCegarLoop]: Abstraction has 465 states and 594 transitions. [2023-11-06 21:59:07,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 42 states have (on average 2.8333333333333335) internal successors, (119), 42 states have internal predecessors, (119), 6 states have call successors, (9), 4 states have call predecessors, (9), 8 states have return successors, (9), 3 states have call predecessors, (9), 6 states have call successors, (9) [2023-11-06 21:59:07,594 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 594 transitions. [2023-11-06 21:59:07,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-06 21:59:07,596 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:59:07,596 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:59:07,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-06 21:59:07,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-06 21:59:07,803 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:59:07,803 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:59:07,803 INFO L85 PathProgramCache]: Analyzing trace with hash -989647576, now seen corresponding path program 1 times [2023-11-06 21:59:07,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:59:07,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199251138] [2023-11-06 21:59:07,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:59:07,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:59:07,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 21:59:07,836 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 21:59:07,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 21:59:07,900 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 21:59:07,900 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-06 21:59:07,901 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-11-06 21:59:07,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-06 21:59:07,908 INFO L445 BasicCegarLoop]: Path program histogram: [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:59:07,912 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-06 21:59:07,948 WARN L1553 BoogieBacktranslator]: Unfinished Backtranslation: Expected StepInfo for loop construct to contain Condition, but it did not [2023-11-06 21:59:07,964 WARN L1553 BoogieBacktranslator]: Unfinished Backtranslation: Expected StepInfo for loop construct to contain Condition, but it did not [2023-11-06 21:59:07,980 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 09:59:07 BoogieIcfgContainer [2023-11-06 21:59:07,980 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-06 21:59:07,981 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-06 21:59:07,981 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-06 21:59:07,981 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-06 21:59:07,982 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:55:49" (3/4) ... [2023-11-06 21:59:07,984 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-11-06 21:59:07,985 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-06 21:59:07,986 INFO L158 Benchmark]: Toolchain (without parser) took 199066.90ms. Allocated memory was 172.0MB in the beginning and 474.0MB in the end (delta: 302.0MB). Free memory was 130.7MB in the beginning and 238.1MB in the end (delta: -107.5MB). Peak memory consumption was 197.0MB. Max. memory is 16.1GB. [2023-11-06 21:59:07,986 INFO L158 Benchmark]: CDTParser took 0.61ms. Allocated memory is still 113.2MB. Free memory is still 62.5MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-06 21:59:07,986 INFO L158 Benchmark]: CACSL2BoogieTranslator took 293.72ms. Allocated memory is still 172.0MB. Free memory was 130.7MB in the beginning and 119.6MB in the end (delta: 11.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-06 21:59:07,987 INFO L158 Benchmark]: Boogie Procedure Inliner took 58.94ms. Allocated memory is still 172.0MB. Free memory was 119.6MB in the beginning and 117.8MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-06 21:59:07,987 INFO L158 Benchmark]: Boogie Preprocessor took 71.25ms. Allocated memory is still 172.0MB. Free memory was 117.8MB in the beginning and 116.4MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-06 21:59:07,987 INFO L158 Benchmark]: RCFGBuilder took 395.54ms. Allocated memory is still 172.0MB. Free memory was 116.4MB in the beginning and 103.8MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-11-06 21:59:07,988 INFO L158 Benchmark]: TraceAbstraction took 198235.04ms. Allocated memory was 172.0MB in the beginning and 474.0MB in the end (delta: 302.0MB). Free memory was 103.1MB in the beginning and 238.1MB in the end (delta: -135.0MB). Peak memory consumption was 169.8MB. Max. memory is 16.1GB. [2023-11-06 21:59:07,988 INFO L158 Benchmark]: Witness Printer took 4.23ms. Allocated memory is still 474.0MB. Free memory is still 238.1MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-06 21:59:07,989 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.61ms. Allocated memory is still 113.2MB. Free memory is still 62.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 293.72ms. Allocated memory is still 172.0MB. Free memory was 130.7MB in the beginning and 119.6MB in the end (delta: 11.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 58.94ms. Allocated memory is still 172.0MB. Free memory was 119.6MB in the beginning and 117.8MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 71.25ms. Allocated memory is still 172.0MB. Free memory was 117.8MB in the beginning and 116.4MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 395.54ms. Allocated memory is still 172.0MB. Free memory was 116.4MB in the beginning and 103.8MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 198235.04ms. Allocated memory was 172.0MB in the beginning and 474.0MB in the end (delta: 302.0MB). Free memory was 103.1MB in the beginning and 238.1MB in the end (delta: -135.0MB). Peak memory consumption was 169.8MB. Max. memory is 16.1GB. * Witness Printer took 4.23ms. Allocated memory is still 474.0MB. Free memory is still 238.1MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expected StepInfo for loop construct to contain Condition, but it did not - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expected StepInfo for loop construct to contain Condition, but it did not - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 57]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: overapproximation of bitwiseOr at line 25. Possible FailurePath: [L17] int N; VAL [N=0] [L32] N = __VERIFIER_nondet_int() [L33] COND TRUE N > 1 [L34] int x[N]; [L35] int temp; [L36] int ret; [L37] int ret2; [L38] int ret5; [L40] int i = 0; VAL [N=2, i=0, x={9:0}] [L40] COND TRUE i < N [L42] x[i] = __VERIFIER_nondet_int() [L40] i++ VAL [N=2, i=1, x={9:0}] [L40] COND TRUE i < N [L42] x[i] = __VERIFIER_nondet_int() [L40] i++ VAL [N=2, i=2, x={9:0}] [L40] COND FALSE !(i < N) VAL [N=2, i=2, x={9:0}] [L45] CALL, EXPR xor(x) VAL [N=2, x={9:0}] [L21] int i; [L22] long long res; [L23] EXPR x[0] [L23] res = x[0] [L24] i = 1 VAL [N=2, i=1, res=10, x={9:0}, x={9:0}] [L24] COND TRUE i < N [L25] EXPR x[i] VAL [N=2, i=1, res=10, x={9:0}, x={9:0}, x[i]=-12] [L25] EXPR res ^ x[i] VAL [N=2, i=1, res ^ x[i]=-4294967297, res=10, x={9:0}, x={9:0}, x[i]=-12] [L25] res = res ^ x[i] [L24] i++ VAL [N=2, i=2, res=-4294967297, x={9:0}, x={9:0}] [L24] COND FALSE !(i < N) VAL [N=2, i=2, res=-4294967297, x={9:0}, x={9:0}] [L27] return res; VAL [N=2, \result=-1, i=2, res=-4294967297, x={9:0}, x={9:0}] [L45] RET, EXPR xor(x) VAL [N=2, x={9:0}, xor(x)=-1] [L45] ret = xor(x) [L47] EXPR x[0] [L47] temp=x[0] [L47] EXPR x[1] [L47] x[0] = x[1] [L47] x[1] = temp VAL [N=2, ret=-1, temp=10, x={9:0}] [L48] CALL, EXPR xor(x) VAL [N=2, x={9:0}] [L21] int i; [L22] long long res; [L23] EXPR x[0] [L23] res = x[0] [L24] i = 1 VAL [N=2, i=1, res=-12, x={9:0}, x={9:0}] [L24] COND TRUE i < N [L25] EXPR x[i] VAL [N=2, i=1, res=-12, x={9:0}, x={9:0}, x[i]=10] [L25] EXPR res ^ x[i] VAL [N=2, i=1, res ^ x[i]=-4294967285, res=-12, x={9:0}, x={9:0}, x[i]=10] [L25] res = res ^ x[i] [L24] i++ VAL [N=2, i=2, res=-4294967285, x={9:0}, x={9:0}] [L24] COND FALSE !(i < N) VAL [N=2, i=2, res=-4294967285, x={9:0}, x={9:0}] [L27] return res; VAL [N=2, \result=11, i=2, res=-4294967285, x={9:0}, x={9:0}] [L48] RET, EXPR xor(x) VAL [N=2, ret=-1, temp=10, x={9:0}, xor(x)=11] [L48] ret2 = xor(x) [L49] EXPR x[0] [L49] temp=x[0] [L50] int i =0 ; VAL [N=2, i=0, ret2=11, ret=-1, temp=-12, x={9:0}] [L50] COND TRUE i main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/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 -> a4ee2cdc1f0cbbd62309a70b71e98ce771ffa71f4ebd85e731799a93fbbc3919 [2023-11-06 21:59:11,206 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 21:59:11,237 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 21:59:11,240 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 21:59:11,242 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 21:59:11,243 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 21:59:11,245 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/array-crafted/xor5.i [2023-11-06 21:59:14,401 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 21:59:14,651 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 21:59:14,651 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/sv-benchmarks/c/array-crafted/xor5.i [2023-11-06 21:59:14,667 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/data/b06a1b077/fffcda29cc574bf481c9a54a246f12ea/FLAG7ec754957 [2023-11-06 21:59:14,684 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/data/b06a1b077/fffcda29cc574bf481c9a54a246f12ea [2023-11-06 21:59:14,692 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 21:59:14,694 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 21:59:14,696 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 21:59:14,697 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 21:59:14,702 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 21:59:14,703 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:59:14" (1/1) ... [2023-11-06 21:59:14,704 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d3809ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:59:14, skipping insertion in model container [2023-11-06 21:59:14,705 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:59:14" (1/1) ... [2023-11-06 21:59:14,728 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 21:59:14,958 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_d77f4dc4-e42e-4d79-a65f-d202e527b755/sv-benchmarks/c/array-crafted/xor5.i[1364,1377] [2023-11-06 21:59:14,964 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:59:14,983 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 21:59:15,042 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_d77f4dc4-e42e-4d79-a65f-d202e527b755/sv-benchmarks/c/array-crafted/xor5.i[1364,1377] [2023-11-06 21:59:15,043 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:59:15,068 INFO L206 MainTranslator]: Completed translation [2023-11-06 21:59:15,068 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:59:15 WrapperNode [2023-11-06 21:59:15,068 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 21:59:15,070 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 21:59:15,071 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 21:59:15,071 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 21:59:15,078 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:59:15" (1/1) ... [2023-11-06 21:59:15,100 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:59:15" (1/1) ... [2023-11-06 21:59:15,133 INFO L138 Inliner]: procedures = 18, calls = 29, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 76 [2023-11-06 21:59:15,134 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 21:59:15,135 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 21:59:15,135 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 21:59:15,135 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 21:59:15,145 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:59:15" (1/1) ... [2023-11-06 21:59:15,170 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:59:15" (1/1) ... [2023-11-06 21:59:15,174 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:59:15" (1/1) ... [2023-11-06 21:59:15,174 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:59:15" (1/1) ... [2023-11-06 21:59:15,182 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:59:15" (1/1) ... [2023-11-06 21:59:15,202 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:59:15" (1/1) ... [2023-11-06 21:59:15,204 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:59:15" (1/1) ... [2023-11-06 21:59:15,205 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:59:15" (1/1) ... [2023-11-06 21:59:15,209 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 21:59:15,210 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 21:59:15,210 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 21:59:15,210 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 21:59:15,211 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:59:15" (1/1) ... [2023-11-06 21:59:15,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:59:15,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:59:15,270 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 21:59:15,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 21:59:15,317 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 21:59:15,318 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-11-06 21:59:15,318 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 21:59:15,318 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-11-06 21:59:15,319 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 21:59:15,319 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 21:59:15,319 INFO L130 BoogieDeclarations]: Found specification of procedure xor [2023-11-06 21:59:15,320 INFO L138 BoogieDeclarations]: Found implementation of procedure xor [2023-11-06 21:59:15,320 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 21:59:15,322 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-11-06 21:59:15,450 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 21:59:15,454 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 21:59:15,760 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 21:59:15,767 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 21:59:15,767 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-06 21:59:15,769 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:59:15 BoogieIcfgContainer [2023-11-06 21:59:15,770 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 21:59:15,773 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 21:59:15,773 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 21:59:15,777 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 21:59:15,777 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 09:59:14" (1/3) ... [2023-11-06 21:59:15,778 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36f701ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:59:15, skipping insertion in model container [2023-11-06 21:59:15,778 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:59:15" (2/3) ... [2023-11-06 21:59:15,779 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36f701ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:59:15, skipping insertion in model container [2023-11-06 21:59:15,779 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:59:15" (3/3) ... [2023-11-06 21:59:15,780 INFO L112 eAbstractionObserver]: Analyzing ICFG xor5.i [2023-11-06 21:59:15,802 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 21:59:15,802 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 21:59:15,855 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 21:59:15,862 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;@69168a64, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 21:59:15,863 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 21:59:15,867 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 23 states have (on average 1.391304347826087) internal successors, (32), 24 states have internal predecessors, (32), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 21:59:15,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-06 21:59:15,877 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:59:15,878 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:59:15,879 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:59:15,884 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:59:15,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1566645772, now seen corresponding path program 1 times [2023-11-06 21:59:15,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 21:59:15,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1398358556] [2023-11-06 21:59:15,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:59:15,901 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 21:59:15,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 21:59:15,908 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 21:59:15,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-11-06 21:59:16,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:59:16,085 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-06 21:59:16,092 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:59:16,152 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-06 21:59:16,152 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:59:16,153 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 21:59:16,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1398358556] [2023-11-06 21:59:16,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1398358556] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:59:16,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:59:16,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 21:59:16,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527244586] [2023-11-06 21:59:16,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:59:16,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 21:59:16,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 21:59:16,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 21:59:16,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 21:59:16,214 INFO L87 Difference]: Start difference. First operand has 29 states, 23 states have (on average 1.391304347826087) internal successors, (32), 24 states have internal predecessors, (32), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-06 21:59:16,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:59:16,243 INFO L93 Difference]: Finished difference Result 53 states and 71 transitions. [2023-11-06 21:59:16,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 21:59:16,246 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 30 [2023-11-06 21:59:16,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:59:16,254 INFO L225 Difference]: With dead ends: 53 [2023-11-06 21:59:16,254 INFO L226 Difference]: Without dead ends: 24 [2023-11-06 21:59:16,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 21:59:16,263 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 [2023-11-06 21:59:16,265 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] [2023-11-06 21:59:16,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-11-06 21:59:16,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-11-06 21:59:16,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 21:59:16,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2023-11-06 21:59:16,311 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 30 [2023-11-06 21:59:16,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:59:16,311 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2023-11-06 21:59:16,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-06 21:59:16,312 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2023-11-06 21:59:16,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-06 21:59:16,315 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:59:16,316 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:59:16,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-11-06 21:59:16,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 21:59:16,528 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:59:16,529 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:59:16,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1143233210, now seen corresponding path program 1 times [2023-11-06 21:59:16,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 21:59:16,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [205777022] [2023-11-06 21:59:16,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:59:16,531 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 21:59:16,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 21:59:16,561 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 21:59:16,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-11-06 21:59:16,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:59:16,677 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 21:59:16,680 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:59:16,766 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-06 21:59:16,766 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:59:16,767 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 21:59:16,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [205777022] [2023-11-06 21:59:16,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [205777022] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:59:16,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:59:16,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:59:16,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855697826] [2023-11-06 21:59:16,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:59:16,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:59:16,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 21:59:16,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:59:16,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:59:16,771 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-06 21:59:16,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:59:16,818 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2023-11-06 21:59:16,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:59:16,819 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 30 [2023-11-06 21:59:16,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:59:16,820 INFO L225 Difference]: With dead ends: 45 [2023-11-06 21:59:16,820 INFO L226 Difference]: Without dead ends: 26 [2023-11-06 21:59:16,821 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 28 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 21:59:16,822 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 1 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 42 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 21:59:16,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 42 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:59:16,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-06 21:59:16,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2023-11-06 21:59:16,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 21:59:16,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2023-11-06 21:59:16,831 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 30 [2023-11-06 21:59:16,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:59:16,831 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2023-11-06 21:59:16,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-06 21:59:16,831 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2023-11-06 21:59:16,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-06 21:59:16,833 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:59:16,833 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:59:16,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-11-06 21:59:17,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 21:59:17,045 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:59:17,046 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:59:17,046 INFO L85 PathProgramCache]: Analyzing trace with hash 148722776, now seen corresponding path program 1 times [2023-11-06 21:59:17,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 21:59:17,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1328216490] [2023-11-06 21:59:17,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:59:17,047 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 21:59:17,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 21:59:17,049 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 21:59:17,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-11-06 21:59:17,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:59:17,146 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 21:59:17,149 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:59:17,214 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-06 21:59:17,217 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:59:17,297 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-06 21:59:17,297 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 21:59:17,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1328216490] [2023-11-06 21:59:17,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1328216490] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:59:17,298 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 21:59:17,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2023-11-06 21:59:17,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582380357] [2023-11-06 21:59:17,299 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 21:59:17,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 21:59:17,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 21:59:17,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 21:59:17,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-06 21:59:17,302 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-06 21:59:17,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:59:17,400 INFO L93 Difference]: Finished difference Result 47 states and 55 transitions. [2023-11-06 21:59:17,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 21:59:17,401 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 32 [2023-11-06 21:59:17,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:59:17,402 INFO L225 Difference]: With dead ends: 47 [2023-11-06 21:59:17,402 INFO L226 Difference]: Without dead ends: 28 [2023-11-06 21:59:17,403 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-06 21:59:17,404 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 1 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:59:17,405 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 74 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 21:59:17,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-11-06 21:59:17,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2023-11-06 21:59:17,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 21:59:17,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2023-11-06 21:59:17,412 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 32 [2023-11-06 21:59:17,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:59:17,412 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2023-11-06 21:59:17,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-06 21:59:17,413 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2023-11-06 21:59:17,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-06 21:59:17,414 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:59:17,414 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:59:17,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-11-06 21:59:17,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 21:59:17,634 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:59:17,636 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:59:17,636 INFO L85 PathProgramCache]: Analyzing trace with hash -2093064586, now seen corresponding path program 2 times [2023-11-06 21:59:17,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 21:59:17,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [732586292] [2023-11-06 21:59:17,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 21:59:17,637 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 21:59:17,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 21:59:17,638 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 21:59:17,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-11-06 21:59:17,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-06 21:59:17,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:59:17,742 INFO L262 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 21:59:17,745 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:59:17,832 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-06 21:59:17,832 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:59:17,832 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 21:59:17,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [732586292] [2023-11-06 21:59:17,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [732586292] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:59:17,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:59:17,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 21:59:17,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903661990] [2023-11-06 21:59:17,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:59:17,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:59:17,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 21:59:17,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:59:17,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:59:17,836 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-06 21:59:17,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:59:17,921 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2023-11-06 21:59:17,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 21:59:17,922 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 34 [2023-11-06 21:59:17,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:59:17,923 INFO L225 Difference]: With dead ends: 46 [2023-11-06 21:59:17,923 INFO L226 Difference]: Without dead ends: 29 [2023-11-06 21:59:17,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 31 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 21:59:17,926 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 10 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:59:17,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 30 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 21:59:17,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-11-06 21:59:17,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2023-11-06 21:59:17,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 21:59:17,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2023-11-06 21:59:17,933 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 34 [2023-11-06 21:59:17,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:59:17,934 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2023-11-06 21:59:17,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-06 21:59:17,934 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2023-11-06 21:59:17,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-06 21:59:17,936 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:59:17,936 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:59:17,952 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-11-06 21:59:18,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 21:59:18,148 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:59:18,148 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:59:18,148 INFO L85 PathProgramCache]: Analyzing trace with hash -367345612, now seen corresponding path program 1 times [2023-11-06 21:59:18,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 21:59:18,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1742926788] [2023-11-06 21:59:18,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:59:18,149 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 21:59:18,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 21:59:18,152 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 21:59:18,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-11-06 21:59:18,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:59:18,288 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 21:59:18,291 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:59:18,520 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-06 21:59:18,520 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:59:18,806 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-06 21:59:18,807 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 21:59:18,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1742926788] [2023-11-06 21:59:18,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1742926788] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:59:18,807 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 21:59:18,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-11-06 21:59:18,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42550208] [2023-11-06 21:59:18,808 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 21:59:18,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 21:59:18,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 21:59:18,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 21:59:18,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-11-06 21:59:18,811 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-06 21:59:19,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:59:19,191 INFO L93 Difference]: Finished difference Result 67 states and 77 transitions. [2023-11-06 21:59:19,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-06 21:59:19,192 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 40 [2023-11-06 21:59:19,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:59:19,194 INFO L225 Difference]: With dead ends: 67 [2023-11-06 21:59:19,194 INFO L226 Difference]: Without dead ends: 54 [2023-11-06 21:59:19,194 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2023-11-06 21:59:19,195 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 55 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 21:59:19,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 74 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 21:59:19,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-11-06 21:59:19,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 29. [2023-11-06 21:59:19,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.125) internal successors, (27), 24 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 21:59:19,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2023-11-06 21:59:19,205 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 40 [2023-11-06 21:59:19,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:59:19,207 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2023-11-06 21:59:19,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-06 21:59:19,208 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2023-11-06 21:59:19,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-06 21:59:19,209 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:59:19,209 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:59:19,225 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-11-06 21:59:19,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 21:59:19,422 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:59:19,422 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:59:19,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1324046446, now seen corresponding path program 1 times [2023-11-06 21:59:19,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 21:59:19,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1068072141] [2023-11-06 21:59:19,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:59:19,424 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 21:59:19,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 21:59:19,425 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 21:59:19,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d77f4dc4-e42e-4d79-a65f-d202e527b755/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-11-06 21:59:19,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:59:19,673 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 49 conjunts are in the unsatisfiable core [2023-11-06 21:59:19,680 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:59:20,276 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:59:20,277 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 23 [2023-11-06 21:59:20,799 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:59:20,799 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 34 [2023-11-06 21:59:21,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:59:21,031 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 21:59:21,036 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:59:21,037 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 58 [2023-11-06 21:59:21,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:59:21,522 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 21:59:21,528 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:59:21,528 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 28 [2023-11-06 21:59:21,787 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-06 21:59:21,787 INFO L327 TraceCheckSpWp]: Computing backward predicates...