./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_50-while_file-81.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5b5ef1-56f8-4635-b5e8-12bcffae4b1c/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5b5ef1-56f8-4635-b5e8-12bcffae4b1c/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_0c5b5ef1-56f8-4635-b5e8-12bcffae4b1c/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5b5ef1-56f8-4635-b5e8-12bcffae4b1c/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_50-while_file-81.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5b5ef1-56f8-4635-b5e8-12bcffae4b1c/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_0c5b5ef1-56f8-4635-b5e8-12bcffae4b1c/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 cdfe6b75857728999b41684b7c331e5339e5672a24edb1faba7c7b16ac6df456 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:15:07,946 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:15:08,059 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5b5ef1-56f8-4635-b5e8-12bcffae4b1c/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:15:08,064 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:15:08,064 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:15:08,120 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:15:08,121 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:15:08,122 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:15:08,123 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:15:08,129 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:15:08,131 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:15:08,131 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:15:08,132 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:15:08,134 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:15:08,134 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:15:08,134 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:15:08,135 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:15:08,135 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:15:08,135 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:15:08,136 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:15:08,136 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:15:08,137 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:15:08,137 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:15:08,138 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:15:08,138 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:15:08,139 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:15:08,139 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:15:08,139 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:15:08,140 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:15:08,140 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:15:08,141 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:15:08,142 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:15:08,142 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:15:08,142 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:15:08,142 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:15:08,143 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:15:08,143 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:15:08,143 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:15:08,143 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:15:08,143 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_0c5b5ef1-56f8-4635-b5e8-12bcffae4b1c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5b5ef1-56f8-4635-b5e8-12bcffae4b1c/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cdfe6b75857728999b41684b7c331e5339e5672a24edb1faba7c7b16ac6df456 [2023-11-06 22:15:08,436 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:15:08,468 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:15:08,471 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:15:08,473 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:15:08,474 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:15:08,475 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5b5ef1-56f8-4635-b5e8-12bcffae4b1c/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_50-while_file-81.i [2023-11-06 22:15:11,637 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:15:11,896 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:15:11,896 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5b5ef1-56f8-4635-b5e8-12bcffae4b1c/sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_50-while_file-81.i [2023-11-06 22:15:11,917 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5b5ef1-56f8-4635-b5e8-12bcffae4b1c/bin/uautomizer-verify-WvqO1wxjHP/data/e20536241/c996f3364d6249a58782d216bee63f65/FLAG10237fc9f [2023-11-06 22:15:11,934 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5b5ef1-56f8-4635-b5e8-12bcffae4b1c/bin/uautomizer-verify-WvqO1wxjHP/data/e20536241/c996f3364d6249a58782d216bee63f65 [2023-11-06 22:15:11,944 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:15:11,947 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:15:11,949 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:15:11,949 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:15:11,955 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:15:11,956 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:15:11" (1/1) ... [2023-11-06 22:15:11,957 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25f36953 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:15:11, skipping insertion in model container [2023-11-06 22:15:11,957 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:15:11" (1/1) ... [2023-11-06 22:15:12,006 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:15:12,186 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_0c5b5ef1-56f8-4635-b5e8-12bcffae4b1c/sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_50-while_file-81.i[915,928] [2023-11-06 22:15:12,252 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:15:12,266 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:15:12,279 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_0c5b5ef1-56f8-4635-b5e8-12bcffae4b1c/sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_50-while_file-81.i[915,928] [2023-11-06 22:15:12,345 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:15:12,364 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:15:12,365 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:15:12 WrapperNode [2023-11-06 22:15:12,365 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:15:12,366 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:15:12,366 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:15:12,367 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:15:12,374 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:15:12" (1/1) ... [2023-11-06 22:15:12,390 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:15:12" (1/1) ... [2023-11-06 22:15:12,465 INFO L138 Inliner]: procedures = 26, calls = 39, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 181 [2023-11-06 22:15:12,467 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:15:12,468 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:15:12,468 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:15:12,468 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:15:12,478 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:15:12" (1/1) ... [2023-11-06 22:15:12,478 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:15:12" (1/1) ... [2023-11-06 22:15:12,495 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:15:12" (1/1) ... [2023-11-06 22:15:12,495 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:15:12" (1/1) ... [2023-11-06 22:15:12,518 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:15:12" (1/1) ... [2023-11-06 22:15:12,522 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:15:12" (1/1) ... [2023-11-06 22:15:12,525 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:15:12" (1/1) ... [2023-11-06 22:15:12,528 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:15:12" (1/1) ... [2023-11-06 22:15:12,533 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:15:12,534 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:15:12,534 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:15:12,534 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:15:12,535 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:15:12" (1/1) ... [2023-11-06 22:15:12,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:15:12,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5b5ef1-56f8-4635-b5e8-12bcffae4b1c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:15:12,571 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5b5ef1-56f8-4635-b5e8-12bcffae4b1c/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:15:12,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5b5ef1-56f8-4635-b5e8-12bcffae4b1c/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:15:12,612 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:15:12,612 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-06 22:15:12,612 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-06 22:15:12,613 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:15:12,613 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:15:12,613 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:15:12,735 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:15:12,738 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:15:13,267 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:15:13,275 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:15:13,275 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-06 22:15:13,278 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:15:13 BoogieIcfgContainer [2023-11-06 22:15:13,278 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:15:13,320 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:15:13,323 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:15:13,327 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:15:13,327 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:15:11" (1/3) ... [2023-11-06 22:15:13,328 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bfc09d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:15:13, skipping insertion in model container [2023-11-06 22:15:13,329 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:15:12" (2/3) ... [2023-11-06 22:15:13,329 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bfc09d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:15:13, skipping insertion in model container [2023-11-06 22:15:13,330 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:15:13" (3/3) ... [2023-11-06 22:15:13,331 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_loopvsstraightlinecode_50-while_file-81.i [2023-11-06 22:15:13,353 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:15:13,353 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 22:15:13,466 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:15:13,476 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;@32d8cffe, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:15:13,477 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 22:15:13,483 INFO L276 IsEmpty]: Start isEmpty. Operand has 75 states, 46 states have (on average 1.391304347826087) internal successors, (64), 47 states have internal predecessors, (64), 26 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2023-11-06 22:15:13,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2023-11-06 22:15:13,513 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:15:13,515 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:15:13,516 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:15:13,525 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:15:13,526 INFO L85 PathProgramCache]: Analyzing trace with hash -319097942, now seen corresponding path program 1 times [2023-11-06 22:15:13,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:15:13,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007892730] [2023-11-06 22:15:13,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:15:13,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:15:13,807 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:15:13,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1218037160] [2023-11-06 22:15:13,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:15:13,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:15:13,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5b5ef1-56f8-4635-b5e8-12bcffae4b1c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:15:13,812 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5b5ef1-56f8-4635-b5e8-12bcffae4b1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:15:13,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5b5ef1-56f8-4635-b5e8-12bcffae4b1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:15:14,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:15:14,066 INFO L262 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 22:15:14,092 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:15:15,019 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 610 proven. 117 refuted. 0 times theorem prover too weak. 573 trivial. 0 not checked. [2023-11-06 22:15:15,020 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:15:15,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 27 proven. 120 refuted. 0 times theorem prover too weak. 1153 trivial. 0 not checked. [2023-11-06 22:15:15,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:15:15,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007892730] [2023-11-06 22:15:15,551 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:15:15,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218037160] [2023-11-06 22:15:15,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218037160] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:15:15,553 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:15:15,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2023-11-06 22:15:15,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588540427] [2023-11-06 22:15:15,559 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:15:15,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-06 22:15:15,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:15:15,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-06 22:15:15,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2023-11-06 22:15:15,613 INFO L87 Difference]: Start difference. First operand has 75 states, 46 states have (on average 1.391304347826087) internal successors, (64), 47 states have internal predecessors, (64), 26 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Second operand has 16 states, 16 states have (on average 4.6875) internal successors, (75), 16 states have internal predecessors, (75), 5 states have call successors, (51), 3 states have call predecessors, (51), 7 states have return successors, (52), 4 states have call predecessors, (52), 5 states have call successors, (52) [2023-11-06 22:15:16,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:15:16,693 INFO L93 Difference]: Finished difference Result 240 states and 413 transitions. [2023-11-06 22:15:16,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-06 22:15:16,696 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.6875) internal successors, (75), 16 states have internal predecessors, (75), 5 states have call successors, (51), 3 states have call predecessors, (51), 7 states have return successors, (52), 4 states have call predecessors, (52), 5 states have call successors, (52) Word has length 163 [2023-11-06 22:15:16,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:15:16,712 INFO L225 Difference]: With dead ends: 240 [2023-11-06 22:15:16,713 INFO L226 Difference]: Without dead ends: 168 [2023-11-06 22:15:16,722 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 313 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=340, Invalid=782, Unknown=0, NotChecked=0, Total=1122 [2023-11-06 22:15:16,727 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 348 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-06 22:15:16,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [351 Valid, 315 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 559 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-06 22:15:16,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2023-11-06 22:15:16,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 120. [2023-11-06 22:15:16,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 78 states have (on average 1.2564102564102564) internal successors, (98), 79 states have internal predecessors, (98), 36 states have call successors, (36), 5 states have call predecessors, (36), 5 states have return successors, (36), 35 states have call predecessors, (36), 36 states have call successors, (36) [2023-11-06 22:15:16,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 170 transitions. [2023-11-06 22:15:16,799 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 170 transitions. Word has length 163 [2023-11-06 22:15:16,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:15:16,801 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 170 transitions. [2023-11-06 22:15:16,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.6875) internal successors, (75), 16 states have internal predecessors, (75), 5 states have call successors, (51), 3 states have call predecessors, (51), 7 states have return successors, (52), 4 states have call predecessors, (52), 5 states have call successors, (52) [2023-11-06 22:15:16,801 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 170 transitions. [2023-11-06 22:15:16,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2023-11-06 22:15:16,806 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:15:16,806 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:15:16,817 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5b5ef1-56f8-4635-b5e8-12bcffae4b1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:15:17,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5b5ef1-56f8-4635-b5e8-12bcffae4b1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-06 22:15:17,013 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:15:17,013 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:15:17,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1110446480, now seen corresponding path program 1 times [2023-11-06 22:15:17,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:15:17,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059588787] [2023-11-06 22:15:17,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:15:17,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:15:17,123 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:15:17,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1713697883] [2023-11-06 22:15:17,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:15:17,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:15:17,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5b5ef1-56f8-4635-b5e8-12bcffae4b1c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:15:17,132 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5b5ef1-56f8-4635-b5e8-12bcffae4b1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:15:17,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5b5ef1-56f8-4635-b5e8-12bcffae4b1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:15:17,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:15:17,275 INFO L262 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 22:15:17,283 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:15:17,530 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 585 proven. 51 refuted. 0 times theorem prover too weak. 664 trivial. 0 not checked. [2023-11-06 22:15:17,530 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:15:17,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 24 proven. 51 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2023-11-06 22:15:17,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:15:17,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059588787] [2023-11-06 22:15:17,794 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:15:17,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713697883] [2023-11-06 22:15:17,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713697883] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:15:17,795 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:15:17,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2023-11-06 22:15:17,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840480037] [2023-11-06 22:15:17,796 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:15:17,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 22:15:17,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:15:17,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 22:15:17,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2023-11-06 22:15:17,799 INFO L87 Difference]: Start difference. First operand 120 states and 170 transitions. Second operand has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 3 states have call successors, (43), 2 states have call predecessors, (43), 4 states have return successors, (44), 3 states have call predecessors, (44), 3 states have call successors, (44) [2023-11-06 22:15:18,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:15:18,600 INFO L93 Difference]: Finished difference Result 326 states and 455 transitions. [2023-11-06 22:15:18,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-06 22:15:18,601 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 3 states have call successors, (43), 2 states have call predecessors, (43), 4 states have return successors, (44), 3 states have call predecessors, (44), 3 states have call successors, (44) Word has length 164 [2023-11-06 22:15:18,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:15:18,611 INFO L225 Difference]: With dead ends: 326 [2023-11-06 22:15:18,611 INFO L226 Difference]: Without dead ends: 209 [2023-11-06 22:15:18,614 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 316 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=154, Invalid=398, Unknown=0, NotChecked=0, Total=552 [2023-11-06 22:15:18,616 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 200 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 563 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-06 22:15:18,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 571 Invalid, 669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 563 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-06 22:15:18,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2023-11-06 22:15:18,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 162. [2023-11-06 22:15:18,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 103 states have (on average 1.174757281553398) internal successors, (121), 105 states have internal predecessors, (121), 47 states have call successors, (47), 11 states have call predecessors, (47), 11 states have return successors, (47), 45 states have call predecessors, (47), 47 states have call successors, (47) [2023-11-06 22:15:18,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 215 transitions. [2023-11-06 22:15:18,683 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 215 transitions. Word has length 164 [2023-11-06 22:15:18,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:15:18,684 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 215 transitions. [2023-11-06 22:15:18,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 3 states have call successors, (43), 2 states have call predecessors, (43), 4 states have return successors, (44), 3 states have call predecessors, (44), 3 states have call successors, (44) [2023-11-06 22:15:18,685 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 215 transitions. [2023-11-06 22:15:18,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2023-11-06 22:15:18,688 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:15:18,689 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:15:18,701 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5b5ef1-56f8-4635-b5e8-12bcffae4b1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:15:18,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5b5ef1-56f8-4635-b5e8-12bcffae4b1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:15:18,896 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:15:18,897 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:15:18,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1286110825, now seen corresponding path program 1 times [2023-11-06 22:15:18,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:15:18,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073324367] [2023-11-06 22:15:18,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:15:18,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:15:18,976 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:15:18,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [814052608] [2023-11-06 22:15:18,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:15:18,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:15:18,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5b5ef1-56f8-4635-b5e8-12bcffae4b1c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:15:18,980 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5b5ef1-56f8-4635-b5e8-12bcffae4b1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:15:19,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5b5ef1-56f8-4635-b5e8-12bcffae4b1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:15:19,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:15:19,217 INFO L262 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-06 22:15:19,224 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:15:19,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 25 proven. 75 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2023-11-06 22:15:19,919 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:15:20,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2023-11-06 22:15:20,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:15:20,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073324367] [2023-11-06 22:15:20,487 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:15:20,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814052608] [2023-11-06 22:15:20,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814052608] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:15:20,487 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:15:20,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2023-11-06 22:15:20,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459752691] [2023-11-06 22:15:20,489 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:15:20,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-06 22:15:20,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:15:20,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-06 22:15:20,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2023-11-06 22:15:20,493 INFO L87 Difference]: Start difference. First operand 162 states and 215 transitions. Second operand has 16 states, 16 states have (on average 4.1875) internal successors, (67), 16 states have internal predecessors, (67), 4 states have call successors, (52), 3 states have call predecessors, (52), 4 states have return successors, (52), 2 states have call predecessors, (52), 4 states have call successors, (52) [2023-11-06 22:15:22,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:15:22,427 INFO L93 Difference]: Finished difference Result 435 states and 588 transitions. [2023-11-06 22:15:22,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-06 22:15:22,428 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.1875) internal successors, (67), 16 states have internal predecessors, (67), 4 states have call successors, (52), 3 states have call predecessors, (52), 4 states have return successors, (52), 2 states have call predecessors, (52), 4 states have call successors, (52) Word has length 165 [2023-11-06 22:15:22,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:15:22,432 INFO L225 Difference]: With dead ends: 435 [2023-11-06 22:15:22,432 INFO L226 Difference]: Without dead ends: 310 [2023-11-06 22:15:22,434 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 320 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=432, Invalid=1128, Unknown=0, NotChecked=0, Total=1560 [2023-11-06 22:15:22,435 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 601 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 762 mSolverCounterSat, 528 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 601 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 1290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 528 IncrementalHoareTripleChecker+Valid, 762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:15:22,435 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [601 Valid, 468 Invalid, 1290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [528 Valid, 762 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-06 22:15:22,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2023-11-06 22:15:22,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 244. [2023-11-06 22:15:22,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 154 states have (on average 1.155844155844156) internal successors, (178), 156 states have internal predecessors, (178), 73 states have call successors, (73), 16 states have call predecessors, (73), 16 states have return successors, (73), 71 states have call predecessors, (73), 73 states have call successors, (73) [2023-11-06 22:15:22,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 324 transitions. [2023-11-06 22:15:22,543 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 324 transitions. Word has length 165 [2023-11-06 22:15:22,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:15:22,547 INFO L495 AbstractCegarLoop]: Abstraction has 244 states and 324 transitions. [2023-11-06 22:15:22,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.1875) internal successors, (67), 16 states have internal predecessors, (67), 4 states have call successors, (52), 3 states have call predecessors, (52), 4 states have return successors, (52), 2 states have call predecessors, (52), 4 states have call successors, (52) [2023-11-06 22:15:22,548 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 324 transitions. [2023-11-06 22:15:22,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2023-11-06 22:15:22,553 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:15:22,553 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:15:22,564 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5b5ef1-56f8-4635-b5e8-12bcffae4b1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:15:22,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5b5ef1-56f8-4635-b5e8-12bcffae4b1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:15:22,759 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:15:22,760 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:15:22,760 INFO L85 PathProgramCache]: Analyzing trace with hash 265042471, now seen corresponding path program 1 times [2023-11-06 22:15:22,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:15:22,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282800792] [2023-11-06 22:15:22,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:15:22,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:15:22,797 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:15:22,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1646421596] [2023-11-06 22:15:22,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:15:22,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:15:22,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5b5ef1-56f8-4635-b5e8-12bcffae4b1c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:15:22,799 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5b5ef1-56f8-4635-b5e8-12bcffae4b1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:15:22,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5b5ef1-56f8-4635-b5e8-12bcffae4b1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:15:23,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:15:23,079 INFO L262 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-06 22:15:23,089 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:15:33,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 52 proven. 144 refuted. 0 times theorem prover too weak. 1104 trivial. 0 not checked. [2023-11-06 22:15:33,789 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:15:43,411 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2023-11-06 22:15:43,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:15:43,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282800792] [2023-11-06 22:15:43,412 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:15:43,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646421596] [2023-11-06 22:15:43,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646421596] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:15:43,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:15:43,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [16] total 24 [2023-11-06 22:15:43,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195470688] [2023-11-06 22:15:43,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:15:43,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:15:43,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:15:43,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:15:43,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2023-11-06 22:15:43,417 INFO L87 Difference]: Start difference. First operand 244 states and 324 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2023-11-06 22:15:49,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:15:49,621 INFO L93 Difference]: Finished difference Result 524 states and 679 transitions. [2023-11-06 22:15:49,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 22:15:49,622 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) Word has length 165 [2023-11-06 22:15:49,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:15:49,626 INFO L225 Difference]: With dead ends: 524 [2023-11-06 22:15:49,627 INFO L226 Difference]: Without dead ends: 361 [2023-11-06 22:15:49,628 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=249, Invalid=941, Unknown=0, NotChecked=0, Total=1190 [2023-11-06 22:15:49,629 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 303 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-11-06 22:15:49,630 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [303 Valid, 464 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-11-06 22:15:49,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2023-11-06 22:15:49,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 262. [2023-11-06 22:15:49,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 172 states have (on average 1.1744186046511629) internal successors, (202), 174 states have internal predecessors, (202), 73 states have call successors, (73), 16 states have call predecessors, (73), 16 states have return successors, (73), 71 states have call predecessors, (73), 73 states have call successors, (73) [2023-11-06 22:15:49,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 348 transitions. [2023-11-06 22:15:49,695 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 348 transitions. Word has length 165 [2023-11-06 22:15:49,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:15:49,696 INFO L495 AbstractCegarLoop]: Abstraction has 262 states and 348 transitions. [2023-11-06 22:15:49,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2023-11-06 22:15:49,697 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 348 transitions. [2023-11-06 22:15:49,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2023-11-06 22:15:49,699 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:15:49,699 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:15:49,708 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5b5ef1-56f8-4635-b5e8-12bcffae4b1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-06 22:15:49,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5b5ef1-56f8-4635-b5e8-12bcffae4b1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:15:49,906 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:15:49,906 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:15:49,906 INFO L85 PathProgramCache]: Analyzing trace with hash 523207909, now seen corresponding path program 1 times [2023-11-06 22:15:49,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:15:49,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255498319] [2023-11-06 22:15:49,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:15:49,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:15:49,961 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:15:49,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1747485601] [2023-11-06 22:15:49,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:15:49,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:15:49,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5b5ef1-56f8-4635-b5e8-12bcffae4b1c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:15:49,967 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5b5ef1-56f8-4635-b5e8-12bcffae4b1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:15:49,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5b5ef1-56f8-4635-b5e8-12bcffae4b1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:15:50,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:15:50,104 INFO L262 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:15:50,108 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:15:50,127 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2023-11-06 22:15:50,127 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:15:50,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:15:50,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255498319] [2023-11-06 22:15:50,128 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:15:50,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747485601] [2023-11-06 22:15:50,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747485601] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:15:50,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:15:50,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:15:50,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237932886] [2023-11-06 22:15:50,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:15:50,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:15:50,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:15:50,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:15:50,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:15:50,131 INFO L87 Difference]: Start difference. First operand 262 states and 348 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2023-11-06 22:15:50,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:15:50,235 INFO L93 Difference]: Finished difference Result 537 states and 694 transitions. [2023-11-06 22:15:50,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:15:50,236 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) Word has length 165 [2023-11-06 22:15:50,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:15:50,240 INFO L225 Difference]: With dead ends: 537 [2023-11-06 22:15:50,240 INFO L226 Difference]: Without dead ends: 360 [2023-11-06 22:15:50,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 163 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 22:15:50,242 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 30 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:15:50,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 207 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:15:50,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2023-11-06 22:15:50,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 355. [2023-11-06 22:15:50,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 246 states have (on average 1.1544715447154472) internal successors, (284), 251 states have internal predecessors, (284), 85 states have call successors, (85), 23 states have call predecessors, (85), 23 states have return successors, (85), 80 states have call predecessors, (85), 85 states have call successors, (85) [2023-11-06 22:15:50,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 454 transitions. [2023-11-06 22:15:50,327 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 454 transitions. Word has length 165 [2023-11-06 22:15:50,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:15:50,327 INFO L495 AbstractCegarLoop]: Abstraction has 355 states and 454 transitions. [2023-11-06 22:15:50,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2023-11-06 22:15:50,328 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 454 transitions. [2023-11-06 22:15:50,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2023-11-06 22:15:50,330 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:15:50,330 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:15:50,336 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5b5ef1-56f8-4635-b5e8-12bcffae4b1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-06 22:15:50,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5b5ef1-56f8-4635-b5e8-12bcffae4b1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:15:50,536 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:15:50,536 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:15:50,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1251799453, now seen corresponding path program 1 times [2023-11-06 22:15:50,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:15:50,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896487303] [2023-11-06 22:15:50,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:15:50,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:15:50,569 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:15:50,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [507176667] [2023-11-06 22:15:50,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:15:50,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:15:50,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5b5ef1-56f8-4635-b5e8-12bcffae4b1c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:15:50,571 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5b5ef1-56f8-4635-b5e8-12bcffae4b1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:15:50,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5b5ef1-56f8-4635-b5e8-12bcffae4b1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:15:50,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:15:50,693 INFO L262 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 22:15:50,697 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:15:50,732 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2023-11-06 22:15:50,732 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:15:50,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:15:50,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896487303] [2023-11-06 22:15:50,733 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:15:50,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507176667] [2023-11-06 22:15:50,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507176667] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:15:50,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:15:50,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:15:50,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067364172] [2023-11-06 22:15:50,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:15:50,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:15:50,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:15:50,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:15:50,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:15:50,736 INFO L87 Difference]: Start difference. First operand 355 states and 454 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2023-11-06 22:15:50,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:15:50,911 INFO L93 Difference]: Finished difference Result 628 states and 798 transitions. [2023-11-06 22:15:50,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:15:50,912 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) Word has length 165 [2023-11-06 22:15:50,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:15:50,915 INFO L225 Difference]: With dead ends: 628 [2023-11-06 22:15:50,915 INFO L226 Difference]: Without dead ends: 382 [2023-11-06 22:15:50,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:15:50,917 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 67 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:15:50,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 291 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:15:50,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2023-11-06 22:15:50,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 306. [2023-11-06 22:15:50,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 212 states have (on average 1.150943396226415) internal successors, (244), 214 states have internal predecessors, (244), 73 states have call successors, (73), 20 states have call predecessors, (73), 20 states have return successors, (73), 71 states have call predecessors, (73), 73 states have call successors, (73) [2023-11-06 22:15:50,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 390 transitions. [2023-11-06 22:15:50,995 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 390 transitions. Word has length 165 [2023-11-06 22:15:50,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:15:50,996 INFO L495 AbstractCegarLoop]: Abstraction has 306 states and 390 transitions. [2023-11-06 22:15:50,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2023-11-06 22:15:50,997 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 390 transitions. [2023-11-06 22:15:50,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2023-11-06 22:15:51,000 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:15:51,002 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:15:51,013 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5b5ef1-56f8-4635-b5e8-12bcffae4b1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 22:15:51,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5b5ef1-56f8-4635-b5e8-12bcffae4b1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:15:51,209 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:15:51,209 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:15:51,209 INFO L85 PathProgramCache]: Analyzing trace with hash -321763543, now seen corresponding path program 1 times [2023-11-06 22:15:51,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:15:51,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136331348] [2023-11-06 22:15:51,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:15:51,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:15:51,250 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:15:51,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1398555911] [2023-11-06 22:15:51,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:15:51,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:15:51,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5b5ef1-56f8-4635-b5e8-12bcffae4b1c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:15:51,253 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5b5ef1-56f8-4635-b5e8-12bcffae4b1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:15:51,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5b5ef1-56f8-4635-b5e8-12bcffae4b1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 22:15:51,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:15:51,542 INFO L262 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-06 22:15:51,550 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:16:03,242 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 123 proven. 72 refuted. 0 times theorem prover too weak. 1105 trivial. 0 not checked. [2023-11-06 22:16:03,243 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:16:11,848 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2023-11-06 22:16:11,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:16:11,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136331348] [2023-11-06 22:16:11,848 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:16:11,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398555911] [2023-11-06 22:16:11,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398555911] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:16:11,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:16:11,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [14] total 22 [2023-11-06 22:16:11,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102140968] [2023-11-06 22:16:11,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:16:11,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:16:11,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:16:11,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:16:11,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=346, Unknown=0, NotChecked=0, Total=462 [2023-11-06 22:16:11,852 INFO L87 Difference]: Start difference. First operand 306 states and 390 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2023-11-06 22:16:19,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:16:19,060 INFO L93 Difference]: Finished difference Result 624 states and 773 transitions. [2023-11-06 22:16:19,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 22:16:19,061 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) Word has length 165 [2023-11-06 22:16:19,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:16:19,065 INFO L225 Difference]: With dead ends: 624 [2023-11-06 22:16:19,065 INFO L226 Difference]: Without dead ends: 424 [2023-11-06 22:16:19,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 308 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=252, Invalid=804, Unknown=0, NotChecked=0, Total=1056 [2023-11-06 22:16:19,067 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 183 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-11-06 22:16:19,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 597 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-11-06 22:16:19,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2023-11-06 22:16:19,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 306. [2023-11-06 22:16:19,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 212 states have (on average 1.150943396226415) internal successors, (244), 214 states have internal predecessors, (244), 73 states have call successors, (73), 20 states have call predecessors, (73), 20 states have return successors, (73), 71 states have call predecessors, (73), 73 states have call successors, (73) [2023-11-06 22:16:19,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 390 transitions. [2023-11-06 22:16:19,137 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 390 transitions. Word has length 165 [2023-11-06 22:16:19,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:16:19,138 INFO L495 AbstractCegarLoop]: Abstraction has 306 states and 390 transitions. [2023-11-06 22:16:19,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2023-11-06 22:16:19,138 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 390 transitions. [2023-11-06 22:16:19,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2023-11-06 22:16:19,140 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:16:19,140 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:16:19,147 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5b5ef1-56f8-4635-b5e8-12bcffae4b1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-06 22:16:19,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5b5ef1-56f8-4635-b5e8-12bcffae4b1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:16:19,347 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:16:19,347 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:16:19,347 INFO L85 PathProgramCache]: Analyzing trace with hash -746074779, now seen corresponding path program 1 times [2023-11-06 22:16:19,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:16:19,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087735553] [2023-11-06 22:16:19,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:19,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:16:19,370 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:16:19,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1770440769] [2023-11-06 22:16:19,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:19,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:16:19,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5b5ef1-56f8-4635-b5e8-12bcffae4b1c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:16:19,371 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5b5ef1-56f8-4635-b5e8-12bcffae4b1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:16:19,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5b5ef1-56f8-4635-b5e8-12bcffae4b1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 22:16:19,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:19,514 INFO L262 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-06 22:16:19,519 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:16:20,532 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 25 proven. 75 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2023-11-06 22:16:20,532 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:16:21,349 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2023-11-06 22:16:21,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:16:21,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087735553] [2023-11-06 22:16:21,350 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:16:21,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770440769] [2023-11-06 22:16:21,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770440769] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:16:21,350 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:16:21,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2023-11-06 22:16:21,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892085528] [2023-11-06 22:16:21,351 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:16:21,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 22:16:21,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:16:21,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 22:16:21,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2023-11-06 22:16:21,353 INFO L87 Difference]: Start difference. First operand 306 states and 390 transitions. Second operand has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 4 states have call successors, (52), 3 states have call predecessors, (52), 4 states have return successors, (52), 2 states have call predecessors, (52), 4 states have call successors, (52) [2023-11-06 22:16:22,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:16:22,656 INFO L93 Difference]: Finished difference Result 576 states and 722 transitions. [2023-11-06 22:16:22,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-06 22:16:22,657 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 4 states have call successors, (52), 3 states have call predecessors, (52), 4 states have return successors, (52), 2 states have call predecessors, (52), 4 states have call successors, (52) Word has length 165 [2023-11-06 22:16:22,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:16:22,660 INFO L225 Difference]: With dead ends: 576 [2023-11-06 22:16:22,660 INFO L226 Difference]: Without dead ends: 357 [2023-11-06 22:16:22,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 314 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=264, Invalid=728, Unknown=0, NotChecked=0, Total=992 [2023-11-06 22:16:22,663 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 420 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 788 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 516 SdHoareTripleChecker+Invalid, 941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-06 22:16:22,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [445 Valid, 516 Invalid, 941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 788 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-06 22:16:22,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2023-11-06 22:16:22,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 300. [2023-11-06 22:16:22,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 206 states have (on average 1.1310679611650485) internal successors, (233), 208 states have internal predecessors, (233), 73 states have call successors, (73), 20 states have call predecessors, (73), 20 states have return successors, (73), 71 states have call predecessors, (73), 73 states have call successors, (73) [2023-11-06 22:16:22,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 379 transitions. [2023-11-06 22:16:22,760 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 379 transitions. Word has length 165 [2023-11-06 22:16:22,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:16:22,760 INFO L495 AbstractCegarLoop]: Abstraction has 300 states and 379 transitions. [2023-11-06 22:16:22,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 4 states have call successors, (52), 3 states have call predecessors, (52), 4 states have return successors, (52), 2 states have call predecessors, (52), 4 states have call successors, (52) [2023-11-06 22:16:22,761 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 379 transitions. [2023-11-06 22:16:22,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2023-11-06 22:16:22,762 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:16:22,763 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:16:22,777 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5b5ef1-56f8-4635-b5e8-12bcffae4b1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 22:16:22,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5b5ef1-56f8-4635-b5e8-12bcffae4b1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:16:22,969 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:16:22,970 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:16:22,970 INFO L85 PathProgramCache]: Analyzing trace with hash 575111338, now seen corresponding path program 1 times [2023-11-06 22:16:22,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:16:22,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47985829] [2023-11-06 22:16:22,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:22,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:16:22,992 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:16:22,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [968817291] [2023-11-06 22:16:22,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:22,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:16:22,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5b5ef1-56f8-4635-b5e8-12bcffae4b1c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:16:22,994 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5b5ef1-56f8-4635-b5e8-12bcffae4b1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:16:23,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5b5ef1-56f8-4635-b5e8-12bcffae4b1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 22:16:23,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:23,131 INFO L262 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 22:16:23,136 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:16:23,161 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2023-11-06 22:16:23,161 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:16:23,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:16:23,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47985829] [2023-11-06 22:16:23,162 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:16:23,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968817291] [2023-11-06 22:16:23,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968817291] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:16:23,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:16:23,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:16:23,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905489581] [2023-11-06 22:16:23,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:16:23,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:16:23,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:16:23,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:16:23,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:16:23,169 INFO L87 Difference]: Start difference. First operand 300 states and 379 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2023-11-06 22:16:23,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:16:23,328 INFO L93 Difference]: Finished difference Result 504 states and 634 transitions. [2023-11-06 22:16:23,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:16:23,328 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) Word has length 165 [2023-11-06 22:16:23,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:16:23,331 INFO L225 Difference]: With dead ends: 504 [2023-11-06 22:16:23,331 INFO L226 Difference]: Without dead ends: 346 [2023-11-06 22:16:23,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:16:23,333 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 57 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:16:23,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 274 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:16:23,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2023-11-06 22:16:23,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 296. [2023-11-06 22:16:23,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 202 states have (on average 1.1237623762376239) internal successors, (227), 204 states have internal predecessors, (227), 73 states have call successors, (73), 20 states have call predecessors, (73), 20 states have return successors, (73), 71 states have call predecessors, (73), 73 states have call successors, (73) [2023-11-06 22:16:23,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 373 transitions. [2023-11-06 22:16:23,405 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 373 transitions. Word has length 165 [2023-11-06 22:16:23,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:16:23,405 INFO L495 AbstractCegarLoop]: Abstraction has 296 states and 373 transitions. [2023-11-06 22:16:23,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2023-11-06 22:16:23,406 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 373 transitions. [2023-11-06 22:16:23,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2023-11-06 22:16:23,407 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:16:23,408 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:16:23,414 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5b5ef1-56f8-4635-b5e8-12bcffae4b1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-06 22:16:23,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5b5ef1-56f8-4635-b5e8-12bcffae4b1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:16:23,614 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:16:23,615 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:16:23,615 INFO L85 PathProgramCache]: Analyzing trace with hash -498831446, now seen corresponding path program 1 times [2023-11-06 22:16:23,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:16:23,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636476749] [2023-11-06 22:16:23,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:23,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:16:23,654 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:16:23,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1162610240] [2023-11-06 22:16:23,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:23,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:16:23,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5b5ef1-56f8-4635-b5e8-12bcffae4b1c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:16:23,658 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5b5ef1-56f8-4635-b5e8-12bcffae4b1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:16:23,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5b5ef1-56f8-4635-b5e8-12bcffae4b1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 22:16:23,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:23,911 INFO L262 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-06 22:16:23,919 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:16:26,889 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 577 proven. 183 refuted. 0 times theorem prover too weak. 540 trivial. 0 not checked. [2023-11-06 22:16:26,889 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:16:34,237 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2023-11-06 22:16:34,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:16:34,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636476749] [2023-11-06 22:16:34,237 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:16:34,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162610240] [2023-11-06 22:16:34,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162610240] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:16:34,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:16:34,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [19] total 26 [2023-11-06 22:16:34,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244836060] [2023-11-06 22:16:34,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:16:34,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:16:34,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:16:34,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:16:34,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=499, Unknown=0, NotChecked=0, Total=650 [2023-11-06 22:16:34,241 INFO L87 Difference]: Start difference. First operand 296 states and 373 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2023-11-06 22:16:36,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:16:36,344 INFO L93 Difference]: Finished difference Result 492 states and 620 transitions. [2023-11-06 22:16:36,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 22:16:36,348 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) Word has length 165 [2023-11-06 22:16:36,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:16:36,352 INFO L225 Difference]: With dead ends: 492 [2023-11-06 22:16:36,352 INFO L226 Difference]: Without dead ends: 338 [2023-11-06 22:16:36,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 305 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=269, Invalid=921, Unknown=0, NotChecked=0, Total=1190 [2023-11-06 22:16:36,354 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 230 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 22:16:36,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [230 Valid, 357 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 22:16:36,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2023-11-06 22:16:36,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 304. [2023-11-06 22:16:36,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 210 states have (on average 1.1285714285714286) internal successors, (237), 212 states have internal predecessors, (237), 73 states have call successors, (73), 20 states have call predecessors, (73), 20 states have return successors, (73), 71 states have call predecessors, (73), 73 states have call successors, (73) [2023-11-06 22:16:36,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 383 transitions. [2023-11-06 22:16:36,455 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 383 transitions. Word has length 165 [2023-11-06 22:16:36,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:16:36,455 INFO L495 AbstractCegarLoop]: Abstraction has 304 states and 383 transitions. [2023-11-06 22:16:36,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2023-11-06 22:16:36,456 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 383 transitions. [2023-11-06 22:16:36,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2023-11-06 22:16:36,457 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:16:36,458 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:16:36,469 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5b5ef1-56f8-4635-b5e8-12bcffae4b1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 22:16:36,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5b5ef1-56f8-4635-b5e8-12bcffae4b1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 22:16:36,665 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:16:36,666 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:16:36,666 INFO L85 PathProgramCache]: Analyzing trace with hash -240666008, now seen corresponding path program 1 times [2023-11-06 22:16:36,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:16:36,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521871440] [2023-11-06 22:16:36,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:36,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:16:36,693 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:16:36,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [382189831] [2023-11-06 22:16:36,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:36,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:16:36,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5b5ef1-56f8-4635-b5e8-12bcffae4b1c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:16:36,696 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5b5ef1-56f8-4635-b5e8-12bcffae4b1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:16:36,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5b5ef1-56f8-4635-b5e8-12bcffae4b1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 22:16:36,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:36,922 INFO L262 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-06 22:16:36,932 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:16:39,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 577 proven. 183 refuted. 0 times theorem prover too weak. 540 trivial. 0 not checked. [2023-11-06 22:16:39,715 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:16:46,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2023-11-06 22:16:46,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:16:46,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521871440] [2023-11-06 22:16:46,480 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:16:46,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382189831] [2023-11-06 22:16:46,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382189831] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:16:46,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:16:46,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [19] total 26 [2023-11-06 22:16:46,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576785109] [2023-11-06 22:16:46,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:16:46,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:16:46,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:16:46,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:16:46,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=499, Unknown=0, NotChecked=0, Total=650 [2023-11-06 22:16:46,483 INFO L87 Difference]: Start difference. First operand 304 states and 383 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2023-11-06 22:16:48,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:16:48,617 INFO L93 Difference]: Finished difference Result 500 states and 629 transitions. [2023-11-06 22:16:48,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 22:16:48,618 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) Word has length 165 [2023-11-06 22:16:48,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:16:48,621 INFO L225 Difference]: With dead ends: 500 [2023-11-06 22:16:48,621 INFO L226 Difference]: Without dead ends: 338 [2023-11-06 22:16:48,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 305 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=269, Invalid=921, Unknown=0, NotChecked=0, Total=1190 [2023-11-06 22:16:48,622 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 186 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 22:16:48,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 404 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 22:16:48,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2023-11-06 22:16:48,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 304. [2023-11-06 22:16:48,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 210 states have (on average 1.1285714285714286) internal successors, (237), 212 states have internal predecessors, (237), 73 states have call successors, (73), 20 states have call predecessors, (73), 20 states have return successors, (73), 71 states have call predecessors, (73), 73 states have call successors, (73) [2023-11-06 22:16:48,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 383 transitions. [2023-11-06 22:16:48,697 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 383 transitions. Word has length 165 [2023-11-06 22:16:48,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:16:48,698 INFO L495 AbstractCegarLoop]: Abstraction has 304 states and 383 transitions. [2023-11-06 22:16:48,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2023-11-06 22:16:48,698 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 383 transitions. [2023-11-06 22:16:48,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2023-11-06 22:16:48,700 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:16:48,700 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:16:48,708 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5b5ef1-56f8-4635-b5e8-12bcffae4b1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 22:16:48,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5b5ef1-56f8-4635-b5e8-12bcffae4b1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-06 22:16:48,907 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:16:48,907 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:16:48,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1394223894, now seen corresponding path program 1 times [2023-11-06 22:16:48,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:16:48,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131704783] [2023-11-06 22:16:48,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:48,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:16:48,945 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:16:48,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1547540869] [2023-11-06 22:16:48,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:48,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:16:48,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5b5ef1-56f8-4635-b5e8-12bcffae4b1c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:16:48,947 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5b5ef1-56f8-4635-b5e8-12bcffae4b1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:16:48,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5b5ef1-56f8-4635-b5e8-12bcffae4b1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 22:16:49,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:49,111 INFO L262 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-06 22:16:49,117 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:16:59,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 52 proven. 144 refuted. 0 times theorem prover too weak. 1104 trivial. 0 not checked. [2023-11-06 22:16:59,306 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:17:05,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2023-11-06 22:17:05,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:17:05,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131704783] [2023-11-06 22:17:05,226 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:17:05,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547540869] [2023-11-06 22:17:05,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547540869] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:17:05,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:17:05,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [16] total 23 [2023-11-06 22:17:05,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226520572] [2023-11-06 22:17:05,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:17:05,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:17:05,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:17:05,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:17:05,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2023-11-06 22:17:05,228 INFO L87 Difference]: Start difference. First operand 304 states and 383 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2023-11-06 22:17:06,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:17:06,823 INFO L93 Difference]: Finished difference Result 534 states and 666 transitions. [2023-11-06 22:17:06,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 22:17:06,828 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) Word has length 166 [2023-11-06 22:17:06,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:17:06,832 INFO L225 Difference]: With dead ends: 534 [2023-11-06 22:17:06,832 INFO L226 Difference]: Without dead ends: 372 [2023-11-06 22:17:06,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 309 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=254, Invalid=802, Unknown=0, NotChecked=0, Total=1056 [2023-11-06 22:17:06,834 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 167 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 22:17:06,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 461 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 22:17:06,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2023-11-06 22:17:06,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 310. [2023-11-06 22:17:06,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 216 states have (on average 1.1296296296296295) internal successors, (244), 218 states have internal predecessors, (244), 73 states have call successors, (73), 20 states have call predecessors, (73), 20 states have return successors, (73), 71 states have call predecessors, (73), 73 states have call successors, (73) [2023-11-06 22:17:06,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 390 transitions. [2023-11-06 22:17:06,940 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 390 transitions. Word has length 166 [2023-11-06 22:17:06,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:17:06,940 INFO L495 AbstractCegarLoop]: Abstraction has 310 states and 390 transitions. [2023-11-06 22:17:06,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2023-11-06 22:17:06,941 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 390 transitions. [2023-11-06 22:17:06,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2023-11-06 22:17:06,945 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:17:06,945 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:17:06,957 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5b5ef1-56f8-4635-b5e8-12bcffae4b1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-06 22:17:07,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5b5ef1-56f8-4635-b5e8-12bcffae4b1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-06 22:17:07,152 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:17:07,152 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:17:07,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1981029908, now seen corresponding path program 1 times [2023-11-06 22:17:07,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:17:07,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463221240] [2023-11-06 22:17:07,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:17:07,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:17:07,172 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:17:07,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [96664211] [2023-11-06 22:17:07,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:17:07,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:17:07,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5b5ef1-56f8-4635-b5e8-12bcffae4b1c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:17:07,174 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5b5ef1-56f8-4635-b5e8-12bcffae4b1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:17:07,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5b5ef1-56f8-4635-b5e8-12bcffae4b1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 22:17:07,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:17:07,367 INFO L262 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-06 22:17:07,374 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:17:17,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 52 proven. 144 refuted. 0 times theorem prover too weak. 1104 trivial. 0 not checked. [2023-11-06 22:17:17,333 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:17:23,231 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2023-11-06 22:17:23,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:17:23,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463221240] [2023-11-06 22:17:23,232 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:17:23,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96664211] [2023-11-06 22:17:23,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96664211] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:17:23,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:17:23,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [16] total 23 [2023-11-06 22:17:23,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137842826] [2023-11-06 22:17:23,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:17:23,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:17:23,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:17:23,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:17:23,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2023-11-06 22:17:23,235 INFO L87 Difference]: Start difference. First operand 310 states and 390 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2023-11-06 22:17:24,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:17:24,892 INFO L93 Difference]: Finished difference Result 540 states and 672 transitions. [2023-11-06 22:17:24,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 22:17:24,893 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) Word has length 166 [2023-11-06 22:17:24,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:17:24,896 INFO L225 Difference]: With dead ends: 540 [2023-11-06 22:17:24,897 INFO L226 Difference]: Without dead ends: 372 [2023-11-06 22:17:24,898 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 309 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=254, Invalid=802, Unknown=0, NotChecked=0, Total=1056 [2023-11-06 22:17:24,899 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 139 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 22:17:24,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 490 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 22:17:24,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2023-11-06 22:17:24,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 307. [2023-11-06 22:17:24,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 213 states have (on average 1.1267605633802817) internal successors, (240), 215 states have internal predecessors, (240), 73 states have call successors, (73), 20 states have call predecessors, (73), 20 states have return successors, (73), 71 states have call predecessors, (73), 73 states have call successors, (73) [2023-11-06 22:17:25,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 386 transitions. [2023-11-06 22:17:25,000 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 386 transitions. Word has length 166 [2023-11-06 22:17:25,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:17:25,000 INFO L495 AbstractCegarLoop]: Abstraction has 307 states and 386 transitions. [2023-11-06 22:17:25,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2023-11-06 22:17:25,001 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 386 transitions. [2023-11-06 22:17:25,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2023-11-06 22:17:25,002 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:17:25,002 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:17:25,007 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5b5ef1-56f8-4635-b5e8-12bcffae4b1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-06 22:17:25,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5b5ef1-56f8-4635-b5e8-12bcffae4b1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-06 22:17:25,203 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:17:25,203 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:17:25,203 INFO L85 PathProgramCache]: Analyzing trace with hash 194124008, now seen corresponding path program 1 times [2023-11-06 22:17:25,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:17:25,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723508352] [2023-11-06 22:17:25,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:17:25,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:17:25,227 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:17:25,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [753773641] [2023-11-06 22:17:25,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:17:25,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:17:25,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5b5ef1-56f8-4635-b5e8-12bcffae4b1c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:17:25,229 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5b5ef1-56f8-4635-b5e8-12bcffae4b1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:17:25,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5b5ef1-56f8-4635-b5e8-12bcffae4b1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-06 22:17:25,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:17:25,434 INFO L262 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 22:17:25,438 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:17:26,063 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 25 proven. 75 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2023-11-06 22:17:26,063 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:17:26,379 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2023-11-06 22:17:26,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:17:26,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723508352] [2023-11-06 22:17:26,379 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:17:26,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753773641] [2023-11-06 22:17:26,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753773641] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:17:26,380 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:17:26,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2023-11-06 22:17:26,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748574847] [2023-11-06 22:17:26,380 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:17:26,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-06 22:17:26,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:17:26,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-06 22:17:26,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2023-11-06 22:17:26,383 INFO L87 Difference]: Start difference. First operand 307 states and 386 transitions. Second operand has 15 states, 15 states have (on average 4.533333333333333) internal successors, (68), 15 states have internal predecessors, (68), 4 states have call successors, (52), 3 states have call predecessors, (52), 4 states have return successors, (52), 2 states have call predecessors, (52), 4 states have call successors, (52) [2023-11-06 22:17:27,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:17:27,904 INFO L93 Difference]: Finished difference Result 613 states and 752 transitions. [2023-11-06 22:17:27,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-06 22:17:27,905 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.533333333333333) internal successors, (68), 15 states have internal predecessors, (68), 4 states have call successors, (52), 3 states have call predecessors, (52), 4 states have return successors, (52), 2 states have call predecessors, (52), 4 states have call successors, (52) Word has length 166 [2023-11-06 22:17:27,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:17:27,909 INFO L225 Difference]: With dead ends: 613 [2023-11-06 22:17:27,909 INFO L226 Difference]: Without dead ends: 396 [2023-11-06 22:17:27,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 319 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=197, Invalid=559, Unknown=0, NotChecked=0, Total=756 [2023-11-06 22:17:27,911 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 420 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 773 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 446 SdHoareTripleChecker+Valid, 577 SdHoareTripleChecker+Invalid, 933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:17:27,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [446 Valid, 577 Invalid, 933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 773 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-06 22:17:27,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2023-11-06 22:17:28,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 295. [2023-11-06 22:17:28,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 201 states have (on average 1.1194029850746268) internal successors, (225), 203 states have internal predecessors, (225), 73 states have call successors, (73), 20 states have call predecessors, (73), 20 states have return successors, (73), 71 states have call predecessors, (73), 73 states have call successors, (73) [2023-11-06 22:17:28,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 371 transitions. [2023-11-06 22:17:28,024 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 371 transitions. Word has length 166 [2023-11-06 22:17:28,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:17:28,025 INFO L495 AbstractCegarLoop]: Abstraction has 295 states and 371 transitions. [2023-11-06 22:17:28,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.533333333333333) internal successors, (68), 15 states have internal predecessors, (68), 4 states have call successors, (52), 3 states have call predecessors, (52), 4 states have return successors, (52), 2 states have call predecessors, (52), 4 states have call successors, (52) [2023-11-06 22:17:28,025 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 371 transitions. [2023-11-06 22:17:28,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2023-11-06 22:17:28,027 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:17:28,027 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:17:28,044 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5b5ef1-56f8-4635-b5e8-12bcffae4b1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-06 22:17:28,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5b5ef1-56f8-4635-b5e8-12bcffae4b1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-06 22:17:28,239 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:17:28,240 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:17:28,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1741298501, now seen corresponding path program 1 times [2023-11-06 22:17:28,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:17:28,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142399657] [2023-11-06 22:17:28,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:17:28,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:17:28,263 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:17:28,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [329503921] [2023-11-06 22:17:28,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:17:28,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:17:28,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5b5ef1-56f8-4635-b5e8-12bcffae4b1c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:17:28,265 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5b5ef1-56f8-4635-b5e8-12bcffae4b1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:17:28,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c5b5ef1-56f8-4635-b5e8-12bcffae4b1c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-06 22:17:28,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:17:28,437 INFO L262 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-06 22:17:28,442 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:18:59,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 6 proven. 69 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2023-11-06 22:18:59,763 INFO L327 TraceCheckSpWp]: Computing backward predicates...