./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-17.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c1e78d-6b39-4793-bf71-7ff11b0f5229/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c1e78d-6b39-4793-bf71-7ff11b0f5229/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c1e78d-6b39-4793-bf71-7ff11b0f5229/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c1e78d-6b39-4793-bf71-7ff11b0f5229/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-17.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c1e78d-6b39-4793-bf71-7ff11b0f5229/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c1e78d-6b39-4793-bf71-7ff11b0f5229/bin/uautomizer-verify-uCwYo4JHxu --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d7e06ec6fa537fe85bfdff5997d89760f89bf3ab66b37451471516c2ec0f2efb --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 08:05:46,752 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 08:05:46,858 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c1e78d-6b39-4793-bf71-7ff11b0f5229/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 08:05:46,870 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 08:05:46,871 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 08:05:46,913 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 08:05:46,914 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 08:05:46,915 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 08:05:46,916 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 08:05:46,921 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 08:05:46,923 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 08:05:46,923 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 08:05:46,924 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 08:05:46,926 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 08:05:46,926 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 08:05:46,926 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 08:05:46,927 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 08:05:46,927 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 08:05:46,928 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 08:05:46,928 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 08:05:46,928 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 08:05:46,929 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 08:05:46,929 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 08:05:46,930 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 08:05:46,930 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 08:05:46,931 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 08:05:46,931 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 08:05:46,932 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 08:05:46,932 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:05:46,933 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 08:05:46,934 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 08:05:46,934 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 08:05:46,935 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 08:05:46,935 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 08:05:46,935 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 08:05:46,935 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 08:05:46,935 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 08:05:46,936 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 08:05:46,936 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 08:05:46,936 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_b7c1e78d-6b39-4793-bf71-7ff11b0f5229/bin/uautomizer-verify-uCwYo4JHxu/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c1e78d-6b39-4793-bf71-7ff11b0f5229/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d7e06ec6fa537fe85bfdff5997d89760f89bf3ab66b37451471516c2ec0f2efb [2023-11-19 08:05:47,185 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 08:05:47,206 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 08:05:47,209 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 08:05:47,210 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 08:05:47,211 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 08:05:47,212 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c1e78d-6b39-4793-bf71-7ff11b0f5229/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-17.i [2023-11-19 08:05:50,380 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 08:05:50,700 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 08:05:50,701 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c1e78d-6b39-4793-bf71-7ff11b0f5229/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-17.i [2023-11-19 08:05:50,714 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c1e78d-6b39-4793-bf71-7ff11b0f5229/bin/uautomizer-verify-uCwYo4JHxu/data/88f5170c1/191f8feed0844b72bec1ef4d3ed1b885/FLAGf714529f7 [2023-11-19 08:05:50,729 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c1e78d-6b39-4793-bf71-7ff11b0f5229/bin/uautomizer-verify-uCwYo4JHxu/data/88f5170c1/191f8feed0844b72bec1ef4d3ed1b885 [2023-11-19 08:05:50,732 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 08:05:50,734 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 08:05:50,736 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 08:05:50,736 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 08:05:50,742 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 08:05:50,743 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:05:50" (1/1) ... [2023-11-19 08:05:50,744 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b96f0e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:50, skipping insertion in model container [2023-11-19 08:05:50,745 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:05:50" (1/1) ... [2023-11-19 08:05:50,800 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 08:05:50,989 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_b7c1e78d-6b39-4793-bf71-7ff11b0f5229/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-17.i[916,929] [2023-11-19 08:05:51,190 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:05:51,207 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 08:05:51,221 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_b7c1e78d-6b39-4793-bf71-7ff11b0f5229/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-17.i[916,929] [2023-11-19 08:05:51,282 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:05:51,306 INFO L206 MainTranslator]: Completed translation [2023-11-19 08:05:51,307 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:51 WrapperNode [2023-11-19 08:05:51,307 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 08:05:51,308 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 08:05:51,309 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 08:05:51,309 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 08:05:51,317 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:51" (1/1) ... [2023-11-19 08:05:51,336 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:51" (1/1) ... [2023-11-19 08:05:51,400 INFO L138 Inliner]: procedures = 26, calls = 100, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 662 [2023-11-19 08:05:51,401 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 08:05:51,401 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 08:05:51,402 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 08:05:51,402 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 08:05:51,412 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:51" (1/1) ... [2023-11-19 08:05:51,412 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:51" (1/1) ... [2023-11-19 08:05:51,419 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:51" (1/1) ... [2023-11-19 08:05:51,420 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:51" (1/1) ... [2023-11-19 08:05:51,449 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:51" (1/1) ... [2023-11-19 08:05:51,457 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:51" (1/1) ... [2023-11-19 08:05:51,476 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:51" (1/1) ... [2023-11-19 08:05:51,486 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:51" (1/1) ... [2023-11-19 08:05:51,497 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 08:05:51,500 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 08:05:51,501 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 08:05:51,501 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 08:05:51,502 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:51" (1/1) ... [2023-11-19 08:05:51,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:05:51,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c1e78d-6b39-4793-bf71-7ff11b0f5229/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:05:51,537 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c1e78d-6b39-4793-bf71-7ff11b0f5229/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 08:05:51,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c1e78d-6b39-4793-bf71-7ff11b0f5229/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 08:05:51,591 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 08:05:51,591 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-19 08:05:51,592 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-19 08:05:51,592 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 08:05:51,592 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 08:05:51,592 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 08:05:51,726 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 08:05:51,729 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 08:05:52,738 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 08:05:52,762 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 08:05:52,762 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 08:05:52,769 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:05:52 BoogieIcfgContainer [2023-11-19 08:05:52,769 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 08:05:52,771 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 08:05:52,771 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 08:05:52,775 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 08:05:52,776 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:05:50" (1/3) ... [2023-11-19 08:05:52,777 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11bc0d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:05:52, skipping insertion in model container [2023-11-19 08:05:52,777 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:51" (2/3) ... [2023-11-19 08:05:52,777 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11bc0d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:05:52, skipping insertion in model container [2023-11-19 08:05:52,777 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:05:52" (3/3) ... [2023-11-19 08:05:52,779 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodesize_ps-cn-250_file-17.i [2023-11-19 08:05:52,794 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 08:05:52,795 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 08:05:52,861 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 08:05:52,869 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@76aeb56b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 08:05:52,870 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 08:05:52,877 INFO L276 IsEmpty]: Start isEmpty. Operand has 262 states, 172 states have (on average 1.5872093023255813) internal successors, (273), 173 states have internal predecessors, (273), 87 states have call successors, (87), 1 states have call predecessors, (87), 1 states have return successors, (87), 87 states have call predecessors, (87), 87 states have call successors, (87) [2023-11-19 08:05:52,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 541 [2023-11-19 08:05:52,919 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:05:52,920 INFO L195 NwaCegarLoop]: trace histogram [87, 87, 87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:05:52,921 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:05:52,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:52,928 INFO L85 PathProgramCache]: Analyzing trace with hash -2094835868, now seen corresponding path program 1 times [2023-11-19 08:05:52,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:52,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105008167] [2023-11-19 08:05:52,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:52,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:53,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:53,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:53,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105008167] [2023-11-19 08:05:53,404 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-19 08:05:53,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85519395] [2023-11-19 08:05:53,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:53,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:05:53,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c1e78d-6b39-4793-bf71-7ff11b0f5229/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:05:53,408 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c1e78d-6b39-4793-bf71-7ff11b0f5229/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:05:53,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c1e78d-6b39-4793-bf71-7ff11b0f5229/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 08:05:53,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:53,942 INFO L262 TraceCheckSpWp]: Trace formula consists of 1256 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-19 08:05:53,985 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:05:54,150 INFO L134 CoverageAnalysis]: Checked inductivity of 14964 backedges. 172 proven. 0 refuted. 0 times theorem prover too weak. 14792 trivial. 0 not checked. [2023-11-19 08:05:54,150 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:05:54,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85519395] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:05:54,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:05:54,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 08:05:54,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221033560] [2023-11-19 08:05:54,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:05:54,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 08:05:54,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:54,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 08:05:54,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 08:05:54,230 INFO L87 Difference]: Start difference. First operand has 262 states, 172 states have (on average 1.5872093023255813) internal successors, (273), 173 states have internal predecessors, (273), 87 states have call successors, (87), 1 states have call predecessors, (87), 1 states have return successors, (87), 87 states have call predecessors, (87), 87 states have call successors, (87) Second operand has 2 states, 2 states have (on average 55.0) internal successors, (110), 2 states have internal predecessors, (110), 2 states have call successors, (87), 2 states have call predecessors, (87), 1 states have return successors, (87), 1 states have call predecessors, (87), 2 states have call successors, (87) [2023-11-19 08:05:54,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:05:54,334 INFO L93 Difference]: Finished difference Result 515 states and 971 transitions. [2023-11-19 08:05:54,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 08:05:54,337 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 55.0) internal successors, (110), 2 states have internal predecessors, (110), 2 states have call successors, (87), 2 states have call predecessors, (87), 1 states have return successors, (87), 1 states have call predecessors, (87), 2 states have call successors, (87) Word has length 540 [2023-11-19 08:05:54,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:05:54,356 INFO L225 Difference]: With dead ends: 515 [2023-11-19 08:05:54,356 INFO L226 Difference]: Without dead ends: 256 [2023-11-19 08:05:54,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 539 GetRequests, 539 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 08:05:54,384 INFO L413 NwaCegarLoop]: 435 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 08:05:54,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 08:05:54,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2023-11-19 08:05:54,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 256. [2023-11-19 08:05:54,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 167 states have (on average 1.562874251497006) internal successors, (261), 167 states have internal predecessors, (261), 87 states have call successors, (87), 1 states have call predecessors, (87), 1 states have return successors, (87), 87 states have call predecessors, (87), 87 states have call successors, (87) [2023-11-19 08:05:54,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 435 transitions. [2023-11-19 08:05:54,520 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 435 transitions. Word has length 540 [2023-11-19 08:05:54,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:05:54,524 INFO L495 AbstractCegarLoop]: Abstraction has 256 states and 435 transitions. [2023-11-19 08:05:54,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 55.0) internal successors, (110), 2 states have internal predecessors, (110), 2 states have call successors, (87), 2 states have call predecessors, (87), 1 states have return successors, (87), 1 states have call predecessors, (87), 2 states have call successors, (87) [2023-11-19 08:05:54,526 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 435 transitions. [2023-11-19 08:05:54,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 541 [2023-11-19 08:05:54,550 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:05:54,551 INFO L195 NwaCegarLoop]: trace histogram [87, 87, 87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:05:54,579 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c1e78d-6b39-4793-bf71-7ff11b0f5229/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-19 08:05:54,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c1e78d-6b39-4793-bf71-7ff11b0f5229/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-19 08:05:54,770 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:05:54,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:54,772 INFO L85 PathProgramCache]: Analyzing trace with hash 999540249, now seen corresponding path program 1 times [2023-11-19 08:05:54,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:54,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647520322] [2023-11-19 08:05:54,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:54,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:54,933 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:05:54,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1822672539] [2023-11-19 08:05:54,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:54,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:05:54,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c1e78d-6b39-4793-bf71-7ff11b0f5229/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:05:54,936 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c1e78d-6b39-4793-bf71-7ff11b0f5229/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:05:54,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c1e78d-6b39-4793-bf71-7ff11b0f5229/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 08:05:55,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:55,361 INFO L262 TraceCheckSpWp]: Trace formula consists of 1254 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 08:05:55,376 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:05:56,053 INFO L134 CoverageAnalysis]: Checked inductivity of 14964 backedges. 7568 proven. 129 refuted. 0 times theorem prover too weak. 7267 trivial. 0 not checked. [2023-11-19 08:05:56,054 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:05:56,612 INFO L134 CoverageAnalysis]: Checked inductivity of 14964 backedges. 129 proven. 129 refuted. 0 times theorem prover too weak. 14706 trivial. 0 not checked. [2023-11-19 08:05:56,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:56,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647520322] [2023-11-19 08:05:56,614 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:05:56,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822672539] [2023-11-19 08:05:56,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822672539] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:05:56,614 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 08:05:56,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-19 08:05:56,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004713141] [2023-11-19 08:05:56,615 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 08:05:56,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 08:05:56,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:56,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 08:05:56,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-19 08:05:56,621 INFO L87 Difference]: Start difference. First operand 256 states and 435 transitions. Second operand has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 2 states have call successors, (130), 2 states have call predecessors, (130), 4 states have return successors, (131), 2 states have call predecessors, (131), 2 states have call successors, (131) [2023-11-19 08:05:57,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:05:57,265 INFO L93 Difference]: Finished difference Result 510 states and 860 transitions. [2023-11-19 08:05:57,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 08:05:57,266 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 2 states have call successors, (130), 2 states have call predecessors, (130), 4 states have return successors, (131), 2 states have call predecessors, (131), 2 states have call successors, (131) Word has length 540 [2023-11-19 08:05:57,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:05:57,273 INFO L225 Difference]: With dead ends: 510 [2023-11-19 08:05:57,273 INFO L226 Difference]: Without dead ends: 257 [2023-11-19 08:05:57,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1082 GetRequests, 1072 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-19 08:05:57,278 INFO L413 NwaCegarLoop]: 324 mSDtfsCounter, 420 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 462 SdHoareTripleChecker+Valid, 797 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 08:05:57,278 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [462 Valid, 797 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 08:05:57,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2023-11-19 08:05:57,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 253. [2023-11-19 08:05:57,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 163 states have (on average 1.5153374233128833) internal successors, (247), 163 states have internal predecessors, (247), 87 states have call successors, (87), 2 states have call predecessors, (87), 2 states have return successors, (87), 87 states have call predecessors, (87), 87 states have call successors, (87) [2023-11-19 08:05:57,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 421 transitions. [2023-11-19 08:05:57,336 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 421 transitions. Word has length 540 [2023-11-19 08:05:57,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:05:57,339 INFO L495 AbstractCegarLoop]: Abstraction has 253 states and 421 transitions. [2023-11-19 08:05:57,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 2 states have call successors, (130), 2 states have call predecessors, (130), 4 states have return successors, (131), 2 states have call predecessors, (131), 2 states have call successors, (131) [2023-11-19 08:05:57,340 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 421 transitions. [2023-11-19 08:05:57,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 541 [2023-11-19 08:05:57,346 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:05:57,346 INFO L195 NwaCegarLoop]: trace histogram [87, 87, 87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:05:57,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c1e78d-6b39-4793-bf71-7ff11b0f5229/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 08:05:57,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c1e78d-6b39-4793-bf71-7ff11b0f5229/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:05:57,570 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:05:57,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:57,571 INFO L85 PathProgramCache]: Analyzing trace with hash -805898085, now seen corresponding path program 1 times [2023-11-19 08:05:57,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:57,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371540793] [2023-11-19 08:05:57,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:57,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:57,726 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:05:57,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [214165623] [2023-11-19 08:05:57,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:57,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:05:57,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c1e78d-6b39-4793-bf71-7ff11b0f5229/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:05:57,733 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c1e78d-6b39-4793-bf71-7ff11b0f5229/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:05:57,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c1e78d-6b39-4793-bf71-7ff11b0f5229/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 08:05:58,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:58,197 INFO L262 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 08:05:58,211 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:05:58,989 INFO L134 CoverageAnalysis]: Checked inductivity of 14964 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14964 trivial. 0 not checked. [2023-11-19 08:05:58,989 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:05:58,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:58,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371540793] [2023-11-19 08:05:58,990 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:05:58,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214165623] [2023-11-19 08:05:58,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214165623] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:05:58,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:05:58,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:05:58,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214239308] [2023-11-19 08:05:58,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:05:58,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 08:05:58,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:58,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 08:05:58,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 08:05:58,997 INFO L87 Difference]: Start difference. First operand 253 states and 421 transitions. Second operand has 4 states, 4 states have (on average 27.0) internal successors, (108), 3 states have internal predecessors, (108), 1 states have call successors, (87), 1 states have call predecessors, (87), 1 states have return successors, (87), 1 states have call predecessors, (87), 1 states have call successors, (87) [2023-11-19 08:05:59,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:05:59,117 INFO L93 Difference]: Finished difference Result 757 states and 1265 transitions. [2023-11-19 08:05:59,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 08:05:59,118 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 3 states have internal predecessors, (108), 1 states have call successors, (87), 1 states have call predecessors, (87), 1 states have return successors, (87), 1 states have call predecessors, (87), 1 states have call successors, (87) Word has length 540 [2023-11-19 08:05:59,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:05:59,125 INFO L225 Difference]: With dead ends: 757 [2023-11-19 08:05:59,126 INFO L226 Difference]: Without dead ends: 507 [2023-11-19 08:05:59,127 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 540 GetRequests, 537 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 08:05:59,129 INFO L413 NwaCegarLoop]: 411 mSDtfsCounter, 184 mSDsluCounter, 815 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 1226 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 08:05:59,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 1226 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 08:05:59,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2023-11-19 08:05:59,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 502. [2023-11-19 08:05:59,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 323 states have (on average 1.5170278637770898) internal successors, (490), 323 states have internal predecessors, (490), 174 states have call successors, (174), 4 states have call predecessors, (174), 4 states have return successors, (174), 174 states have call predecessors, (174), 174 states have call successors, (174) [2023-11-19 08:05:59,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 838 transitions. [2023-11-19 08:05:59,302 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 838 transitions. Word has length 540 [2023-11-19 08:05:59,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:05:59,306 INFO L495 AbstractCegarLoop]: Abstraction has 502 states and 838 transitions. [2023-11-19 08:05:59,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 3 states have internal predecessors, (108), 1 states have call successors, (87), 1 states have call predecessors, (87), 1 states have return successors, (87), 1 states have call predecessors, (87), 1 states have call successors, (87) [2023-11-19 08:05:59,307 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 838 transitions. [2023-11-19 08:05:59,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 542 [2023-11-19 08:05:59,318 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:05:59,318 INFO L195 NwaCegarLoop]: trace histogram [87, 87, 87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:05:59,343 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c1e78d-6b39-4793-bf71-7ff11b0f5229/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-19 08:05:59,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c1e78d-6b39-4793-bf71-7ff11b0f5229/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:05:59,532 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:05:59,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:59,533 INFO L85 PathProgramCache]: Analyzing trace with hash 295201337, now seen corresponding path program 1 times [2023-11-19 08:05:59,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:59,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039477313] [2023-11-19 08:05:59,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:59,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:59,635 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:05:59,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1627875082] [2023-11-19 08:05:59,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:59,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:05:59,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c1e78d-6b39-4793-bf71-7ff11b0f5229/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:05:59,637 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c1e78d-6b39-4793-bf71-7ff11b0f5229/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:05:59,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c1e78d-6b39-4793-bf71-7ff11b0f5229/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 08:06:00,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:00,047 INFO L262 TraceCheckSpWp]: Trace formula consists of 1254 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 08:06:00,060 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:06:00,839 INFO L134 CoverageAnalysis]: Checked inductivity of 14964 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14964 trivial. 0 not checked. [2023-11-19 08:06:00,839 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:06:00,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:06:00,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039477313] [2023-11-19 08:06:00,840 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:06:00,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627875082] [2023-11-19 08:06:00,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627875082] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:06:00,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:06:00,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:06:00,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006814548] [2023-11-19 08:06:00,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:06:00,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 08:06:00,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:06:00,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 08:06:00,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 08:06:00,843 INFO L87 Difference]: Start difference. First operand 502 states and 838 transitions. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 3 states have internal predecessors, (109), 1 states have call successors, (87), 1 states have call predecessors, (87), 1 states have return successors, (87), 1 states have call predecessors, (87), 1 states have call successors, (87) [2023-11-19 08:06:01,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:06:01,208 INFO L93 Difference]: Finished difference Result 1253 states and 2088 transitions. [2023-11-19 08:06:01,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 08:06:01,209 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 3 states have internal predecessors, (109), 1 states have call successors, (87), 1 states have call predecessors, (87), 1 states have return successors, (87), 1 states have call predecessors, (87), 1 states have call successors, (87) Word has length 541 [2023-11-19 08:06:01,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:06:01,217 INFO L225 Difference]: With dead ends: 1253 [2023-11-19 08:06:01,217 INFO L226 Difference]: Without dead ends: 754 [2023-11-19 08:06:01,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 540 GetRequests, 538 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 08:06:01,221 INFO L413 NwaCegarLoop]: 571 mSDtfsCounter, 362 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 799 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 08:06:01,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [362 Valid, 799 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 08:06:01,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 754 states. [2023-11-19 08:06:01,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 754 to 750. [2023-11-19 08:06:01,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 750 states, 493 states have (on average 1.5172413793103448) internal successors, (748), 495 states have internal predecessors, (748), 250 states have call successors, (250), 6 states have call predecessors, (250), 6 states have return successors, (250), 248 states have call predecessors, (250), 250 states have call successors, (250) [2023-11-19 08:06:01,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 1248 transitions. [2023-11-19 08:06:01,362 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 1248 transitions. Word has length 541 [2023-11-19 08:06:01,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:06:01,363 INFO L495 AbstractCegarLoop]: Abstraction has 750 states and 1248 transitions. [2023-11-19 08:06:01,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 3 states have internal predecessors, (109), 1 states have call successors, (87), 1 states have call predecessors, (87), 1 states have return successors, (87), 1 states have call predecessors, (87), 1 states have call successors, (87) [2023-11-19 08:06:01,364 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 1248 transitions. [2023-11-19 08:06:01,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 542 [2023-11-19 08:06:01,369 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:06:01,370 INFO L195 NwaCegarLoop]: trace histogram [87, 87, 87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:06:01,398 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c1e78d-6b39-4793-bf71-7ff11b0f5229/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 08:06:01,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c1e78d-6b39-4793-bf71-7ff11b0f5229/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:06:01,584 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:06:01,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:01,585 INFO L85 PathProgramCache]: Analyzing trace with hash -110916740, now seen corresponding path program 1 times [2023-11-19 08:06:01,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:01,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54199225] [2023-11-19 08:06:01,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:01,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:01,678 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:06:01,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1887337562] [2023-11-19 08:06:01,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:01,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:06:01,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c1e78d-6b39-4793-bf71-7ff11b0f5229/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:01,680 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c1e78d-6b39-4793-bf71-7ff11b0f5229/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:06:01,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c1e78d-6b39-4793-bf71-7ff11b0f5229/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 08:06:02,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:02,072 INFO L262 TraceCheckSpWp]: Trace formula consists of 1258 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 08:06:02,087 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:06:02,158 INFO L134 CoverageAnalysis]: Checked inductivity of 14964 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14964 trivial. 0 not checked. [2023-11-19 08:06:02,158 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:06:02,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:06:02,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54199225] [2023-11-19 08:06:02,164 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:06:02,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887337562] [2023-11-19 08:06:02,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887337562] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:06:02,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:06:02,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 08:06:02,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611827278] [2023-11-19 08:06:02,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:06:02,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 08:06:02,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:06:02,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 08:06:02,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 08:06:02,174 INFO L87 Difference]: Start difference. First operand 750 states and 1248 transitions. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 1 states have call successors, (87), 1 states have call predecessors, (87), 1 states have return successors, (87), 1 states have call predecessors, (87), 1 states have call successors, (87) [2023-11-19 08:06:02,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:06:02,370 INFO L93 Difference]: Finished difference Result 2109 states and 3496 transitions. [2023-11-19 08:06:02,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 08:06:02,371 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 1 states have call successors, (87), 1 states have call predecessors, (87), 1 states have return successors, (87), 1 states have call predecessors, (87), 1 states have call successors, (87) Word has length 541 [2023-11-19 08:06:02,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:06:02,385 INFO L225 Difference]: With dead ends: 2109 [2023-11-19 08:06:02,386 INFO L226 Difference]: Without dead ends: 1362 [2023-11-19 08:06:02,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 541 GetRequests, 538 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 08:06:02,391 INFO L413 NwaCegarLoop]: 514 mSDtfsCounter, 300 mSDsluCounter, 901 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 1415 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 08:06:02,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [300 Valid, 1415 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 08:06:02,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1362 states. [2023-11-19 08:06:02,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1362 to 1357. [2023-11-19 08:06:02,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1357 states, 880 states have (on average 1.4954545454545454) internal successors, (1316), 886 states have internal predecessors, (1316), 464 states have call successors, (464), 12 states have call predecessors, (464), 12 states have return successors, (464), 458 states have call predecessors, (464), 464 states have call successors, (464) [2023-11-19 08:06:02,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1357 states to 1357 states and 2244 transitions. [2023-11-19 08:06:02,671 INFO L78 Accepts]: Start accepts. Automaton has 1357 states and 2244 transitions. Word has length 541 [2023-11-19 08:06:02,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:06:02,672 INFO L495 AbstractCegarLoop]: Abstraction has 1357 states and 2244 transitions. [2023-11-19 08:06:02,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 1 states have call successors, (87), 1 states have call predecessors, (87), 1 states have return successors, (87), 1 states have call predecessors, (87), 1 states have call successors, (87) [2023-11-19 08:06:02,673 INFO L276 IsEmpty]: Start isEmpty. Operand 1357 states and 2244 transitions. [2023-11-19 08:06:02,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 543 [2023-11-19 08:06:02,680 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:06:02,680 INFO L195 NwaCegarLoop]: trace histogram [87, 87, 87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:06:02,712 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c1e78d-6b39-4793-bf71-7ff11b0f5229/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 08:06:02,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c1e78d-6b39-4793-bf71-7ff11b0f5229/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:06:02,894 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:06:02,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:02,895 INFO L85 PathProgramCache]: Analyzing trace with hash 605252339, now seen corresponding path program 1 times [2023-11-19 08:06:02,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:02,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213625662] [2023-11-19 08:06:02,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:02,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:02,980 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:06:02,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1934723140] [2023-11-19 08:06:02,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:02,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:06:02,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c1e78d-6b39-4793-bf71-7ff11b0f5229/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:02,982 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c1e78d-6b39-4793-bf71-7ff11b0f5229/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:06:03,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c1e78d-6b39-4793-bf71-7ff11b0f5229/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 08:06:03,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:03,410 INFO L262 TraceCheckSpWp]: Trace formula consists of 1259 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 08:06:03,422 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:06:04,158 INFO L134 CoverageAnalysis]: Checked inductivity of 14964 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14964 trivial. 0 not checked. [2023-11-19 08:06:04,159 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:06:04,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:06:04,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213625662] [2023-11-19 08:06:04,161 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:06:04,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934723140] [2023-11-19 08:06:04,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934723140] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:06:04,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:06:04,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 08:06:04,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945528743] [2023-11-19 08:06:04,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:06:04,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 08:06:04,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:06:04,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 08:06:04,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 08:06:04,166 INFO L87 Difference]: Start difference. First operand 1357 states and 2244 transitions. Second operand has 5 states, 5 states have (on average 22.0) internal successors, (110), 4 states have internal predecessors, (110), 1 states have call successors, (87), 1 states have call predecessors, (87), 1 states have return successors, (87), 1 states have call predecessors, (87), 1 states have call successors, (87) [2023-11-19 08:06:04,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:06:04,752 INFO L93 Difference]: Finished difference Result 3408 states and 5670 transitions. [2023-11-19 08:06:04,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 08:06:04,753 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.0) internal successors, (110), 4 states have internal predecessors, (110), 1 states have call successors, (87), 1 states have call predecessors, (87), 1 states have return successors, (87), 1 states have call predecessors, (87), 1 states have call successors, (87) Word has length 542 [2023-11-19 08:06:04,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:06:04,772 INFO L225 Difference]: With dead ends: 3408 [2023-11-19 08:06:04,772 INFO L226 Difference]: Without dead ends: 2054 [2023-11-19 08:06:04,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 543 GetRequests, 538 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-19 08:06:04,781 INFO L413 NwaCegarLoop]: 412 mSDtfsCounter, 372 mSDsluCounter, 1025 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 1437 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 08:06:04,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [372 Valid, 1437 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 08:06:04,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2054 states. [2023-11-19 08:06:05,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2054 to 1828. [2023-11-19 08:06:05,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1828 states, 1261 states have (on average 1.5527359238699445) internal successors, (1958), 1267 states have internal predecessors, (1958), 551 states have call successors, (551), 15 states have call predecessors, (551), 15 states have return successors, (551), 545 states have call predecessors, (551), 551 states have call successors, (551) [2023-11-19 08:06:05,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1828 states to 1828 states and 3060 transitions. [2023-11-19 08:06:05,161 INFO L78 Accepts]: Start accepts. Automaton has 1828 states and 3060 transitions. Word has length 542 [2023-11-19 08:06:05,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:06:05,162 INFO L495 AbstractCegarLoop]: Abstraction has 1828 states and 3060 transitions. [2023-11-19 08:06:05,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.0) internal successors, (110), 4 states have internal predecessors, (110), 1 states have call successors, (87), 1 states have call predecessors, (87), 1 states have return successors, (87), 1 states have call predecessors, (87), 1 states have call successors, (87) [2023-11-19 08:06:05,163 INFO L276 IsEmpty]: Start isEmpty. Operand 1828 states and 3060 transitions. [2023-11-19 08:06:05,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 544 [2023-11-19 08:06:05,169 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:06:05,169 INFO L195 NwaCegarLoop]: trace histogram [87, 87, 87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:06:05,197 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c1e78d-6b39-4793-bf71-7ff11b0f5229/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 08:06:05,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c1e78d-6b39-4793-bf71-7ff11b0f5229/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-19 08:06:05,383 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:06:05,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:05,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1178744967, now seen corresponding path program 1 times [2023-11-19 08:06:05,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:05,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229633601] [2023-11-19 08:06:05,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:05,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:05,465 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:06:05,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [240615621] [2023-11-19 08:06:05,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:05,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:06:05,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c1e78d-6b39-4793-bf71-7ff11b0f5229/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:05,467 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c1e78d-6b39-4793-bf71-7ff11b0f5229/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:06:05,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c1e78d-6b39-4793-bf71-7ff11b0f5229/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 08:06:05,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:05,895 INFO L262 TraceCheckSpWp]: Trace formula consists of 1263 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-19 08:06:05,908 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:06:07,991 INFO L134 CoverageAnalysis]: Checked inductivity of 14964 backedges. 3146 proven. 228 refuted. 0 times theorem prover too weak. 11590 trivial. 0 not checked. [2023-11-19 08:06:07,991 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:06:09,123 INFO L134 CoverageAnalysis]: Checked inductivity of 14964 backedges. 30 proven. 228 refuted. 0 times theorem prover too weak. 14706 trivial. 0 not checked. [2023-11-19 08:06:09,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:06:09,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229633601] [2023-11-19 08:06:09,124 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:06:09,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240615621] [2023-11-19 08:06:09,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240615621] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:06:09,124 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 08:06:09,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2023-11-19 08:06:09,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432881376] [2023-11-19 08:06:09,125 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 08:06:09,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-19 08:06:09,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:06:09,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-19 08:06:09,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2023-11-19 08:06:09,129 INFO L87 Difference]: Start difference. First operand 1828 states and 3060 transitions. Second operand has 15 states, 15 states have (on average 14.666666666666666) internal successors, (220), 15 states have internal predecessors, (220), 4 states have call successors, (174), 3 states have call predecessors, (174), 5 states have return successors, (174), 4 states have call predecessors, (174), 4 states have call successors, (174) [2023-11-19 08:06:11,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:06:11,388 INFO L93 Difference]: Finished difference Result 5314 states and 8652 transitions. [2023-11-19 08:06:11,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-19 08:06:11,389 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 14.666666666666666) internal successors, (220), 15 states have internal predecessors, (220), 4 states have call successors, (174), 3 states have call predecessors, (174), 5 states have return successors, (174), 4 states have call predecessors, (174), 4 states have call successors, (174) Word has length 543 [2023-11-19 08:06:11,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:06:11,419 INFO L225 Difference]: With dead ends: 5314 [2023-11-19 08:06:11,420 INFO L226 Difference]: Without dead ends: 3960 [2023-11-19 08:06:11,426 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1095 GetRequests, 1072 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=189, Invalid=411, Unknown=0, NotChecked=0, Total=600 [2023-11-19 08:06:11,428 INFO L413 NwaCegarLoop]: 330 mSDtfsCounter, 1960 mSDsluCounter, 1742 mSDsCounter, 0 mSdLazyCounter, 1327 mSolverCounterSat, 808 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1960 SdHoareTripleChecker+Valid, 2072 SdHoareTripleChecker+Invalid, 2135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 808 IncrementalHoareTripleChecker+Valid, 1327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-11-19 08:06:11,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1960 Valid, 2072 Invalid, 2135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [808 Valid, 1327 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-11-19 08:06:11,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3960 states. [2023-11-19 08:06:12,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3960 to 3189. [2023-11-19 08:06:12,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3189 states, 2049 states have (on average 1.429477794045876) internal successors, (2929), 2070 states have internal predecessors, (2929), 1095 states have call successors, (1095), 44 states have call predecessors, (1095), 44 states have return successors, (1095), 1074 states have call predecessors, (1095), 1095 states have call successors, (1095) [2023-11-19 08:06:12,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3189 states to 3189 states and 5119 transitions. [2023-11-19 08:06:12,168 INFO L78 Accepts]: Start accepts. Automaton has 3189 states and 5119 transitions. Word has length 543 [2023-11-19 08:06:12,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:06:12,170 INFO L495 AbstractCegarLoop]: Abstraction has 3189 states and 5119 transitions. [2023-11-19 08:06:12,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 14.666666666666666) internal successors, (220), 15 states have internal predecessors, (220), 4 states have call successors, (174), 3 states have call predecessors, (174), 5 states have return successors, (174), 4 states have call predecessors, (174), 4 states have call successors, (174) [2023-11-19 08:06:12,171 INFO L276 IsEmpty]: Start isEmpty. Operand 3189 states and 5119 transitions. [2023-11-19 08:06:12,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 544 [2023-11-19 08:06:12,177 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:06:12,177 INFO L195 NwaCegarLoop]: trace histogram [87, 87, 87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:06:12,226 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c1e78d-6b39-4793-bf71-7ff11b0f5229/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 08:06:12,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c1e78d-6b39-4793-bf71-7ff11b0f5229/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-19 08:06:12,422 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:06:12,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:12,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1436910405, now seen corresponding path program 1 times [2023-11-19 08:06:12,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:12,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462603481] [2023-11-19 08:06:12,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:12,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:12,505 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:06:12,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1089507261] [2023-11-19 08:06:12,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:12,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:06:12,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c1e78d-6b39-4793-bf71-7ff11b0f5229/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:12,507 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c1e78d-6b39-4793-bf71-7ff11b0f5229/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:06:12,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c1e78d-6b39-4793-bf71-7ff11b0f5229/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 08:06:12,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:12,963 INFO L262 TraceCheckSpWp]: Trace formula consists of 1261 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-19 08:06:12,975 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:06:14,918 INFO L134 CoverageAnalysis]: Checked inductivity of 14964 backedges. 7496 proven. 144 refuted. 0 times theorem prover too weak. 7324 trivial. 0 not checked. [2023-11-19 08:06:14,918 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:06:15,911 INFO L134 CoverageAnalysis]: Checked inductivity of 14964 backedges. 114 proven. 144 refuted. 0 times theorem prover too weak. 14706 trivial. 0 not checked. [2023-11-19 08:06:15,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:06:15,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462603481] [2023-11-19 08:06:15,912 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:06:15,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089507261] [2023-11-19 08:06:15,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089507261] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:06:15,913 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 08:06:15,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2023-11-19 08:06:15,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235079954] [2023-11-19 08:06:15,914 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 08:06:15,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-19 08:06:15,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:06:15,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-19 08:06:15,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2023-11-19 08:06:15,918 INFO L87 Difference]: Start difference. First operand 3189 states and 5119 transitions. Second operand has 14 states, 13 states have (on average 16.153846153846153) internal successors, (210), 14 states have internal predecessors, (210), 6 states have call successors, (174), 4 states have call predecessors, (174), 5 states have return successors, (174), 4 states have call predecessors, (174), 6 states have call successors, (174) [2023-11-19 08:06:17,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:06:17,039 INFO L93 Difference]: Finished difference Result 6395 states and 10227 transitions. [2023-11-19 08:06:17,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-19 08:06:17,041 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 16.153846153846153) internal successors, (210), 14 states have internal predecessors, (210), 6 states have call successors, (174), 4 states have call predecessors, (174), 5 states have return successors, (174), 4 states have call predecessors, (174), 6 states have call successors, (174) Word has length 543 [2023-11-19 08:06:17,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:06:17,070 INFO L225 Difference]: With dead ends: 6395 [2023-11-19 08:06:17,070 INFO L226 Difference]: Without dead ends: 3361 [2023-11-19 08:06:17,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1090 GetRequests, 1072 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=242, Unknown=0, NotChecked=0, Total=380 [2023-11-19 08:06:17,083 INFO L413 NwaCegarLoop]: 309 mSDtfsCounter, 561 mSDsluCounter, 1045 mSDsCounter, 0 mSdLazyCounter, 695 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 599 SdHoareTripleChecker+Valid, 1354 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-19 08:06:17,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [599 Valid, 1354 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 695 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-19 08:06:17,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3361 states. [2023-11-19 08:06:17,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3361 to 3225. [2023-11-19 08:06:17,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3225 states, 2076 states have (on average 1.416184971098266) internal successors, (2940), 2097 states have internal predecessors, (2940), 1095 states have call successors, (1095), 53 states have call predecessors, (1095), 53 states have return successors, (1095), 1074 states have call predecessors, (1095), 1095 states have call successors, (1095) [2023-11-19 08:06:17,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3225 states to 3225 states and 5130 transitions. [2023-11-19 08:06:17,810 INFO L78 Accepts]: Start accepts. Automaton has 3225 states and 5130 transitions. Word has length 543 [2023-11-19 08:06:17,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:06:17,812 INFO L495 AbstractCegarLoop]: Abstraction has 3225 states and 5130 transitions. [2023-11-19 08:06:17,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 16.153846153846153) internal successors, (210), 14 states have internal predecessors, (210), 6 states have call successors, (174), 4 states have call predecessors, (174), 5 states have return successors, (174), 4 states have call predecessors, (174), 6 states have call successors, (174) [2023-11-19 08:06:17,813 INFO L276 IsEmpty]: Start isEmpty. Operand 3225 states and 5130 transitions. [2023-11-19 08:06:17,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 545 [2023-11-19 08:06:17,819 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:06:17,820 INFO L195 NwaCegarLoop]: trace histogram [87, 87, 87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:06:17,849 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c1e78d-6b39-4793-bf71-7ff11b0f5229/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-19 08:06:18,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c1e78d-6b39-4793-bf71-7ff11b0f5229/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-19 08:06:18,037 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:06:18,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:18,037 INFO L85 PathProgramCache]: Analyzing trace with hash 442304888, now seen corresponding path program 1 times [2023-11-19 08:06:18,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:18,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835485534] [2023-11-19 08:06:18,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:18,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:18,119 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:06:18,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1642379429] [2023-11-19 08:06:18,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:18,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:06:18,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c1e78d-6b39-4793-bf71-7ff11b0f5229/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:18,121 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c1e78d-6b39-4793-bf71-7ff11b0f5229/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:06:18,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c1e78d-6b39-4793-bf71-7ff11b0f5229/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 08:06:18,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:18,513 INFO L262 TraceCheckSpWp]: Trace formula consists of 1262 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 08:06:18,523 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:06:18,603 INFO L134 CoverageAnalysis]: Checked inductivity of 14964 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14964 trivial. 0 not checked. [2023-11-19 08:06:18,604 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:06:18,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:06:18,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835485534] [2023-11-19 08:06:18,604 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:06:18,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642379429] [2023-11-19 08:06:18,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642379429] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:06:18,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:06:18,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:06:18,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822841272] [2023-11-19 08:06:18,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:06:18,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:06:18,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:06:18,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:06:18,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:06:18,610 INFO L87 Difference]: Start difference. First operand 3225 states and 5130 transitions. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 1 states have call successors, (87), 1 states have call predecessors, (87), 1 states have return successors, (87), 1 states have call predecessors, (87), 1 states have call successors, (87) [2023-11-19 08:06:19,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:06:19,181 INFO L93 Difference]: Finished difference Result 8581 states and 13651 transitions. [2023-11-19 08:06:19,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:06:19,184 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 1 states have call successors, (87), 1 states have call predecessors, (87), 1 states have return successors, (87), 1 states have call predecessors, (87), 1 states have call successors, (87) Word has length 544 [2023-11-19 08:06:19,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:06:19,226 INFO L225 Difference]: With dead ends: 8581 [2023-11-19 08:06:19,226 INFO L226 Difference]: Without dead ends: 5515 [2023-11-19 08:06:19,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 543 GetRequests, 542 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:06:19,242 INFO L413 NwaCegarLoop]: 404 mSDtfsCounter, 213 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 798 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 08:06:19,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 798 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 08:06:19,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5515 states. [2023-11-19 08:06:20,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5515 to 5497. [2023-11-19 08:06:20,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5497 states, 3723 states have (on average 1.4383561643835616) internal successors, (5355), 3768 states have internal predecessors, (5355), 1687 states have call successors, (1687), 86 states have call predecessors, (1687), 86 states have return successors, (1687), 1642 states have call predecessors, (1687), 1687 states have call successors, (1687) [2023-11-19 08:06:20,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5497 states to 5497 states and 8729 transitions. [2023-11-19 08:06:20,229 INFO L78 Accepts]: Start accepts. Automaton has 5497 states and 8729 transitions. Word has length 544 [2023-11-19 08:06:20,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:06:20,230 INFO L495 AbstractCegarLoop]: Abstraction has 5497 states and 8729 transitions. [2023-11-19 08:06:20,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 1 states have call successors, (87), 1 states have call predecessors, (87), 1 states have return successors, (87), 1 states have call predecessors, (87), 1 states have call successors, (87) [2023-11-19 08:06:20,231 INFO L276 IsEmpty]: Start isEmpty. Operand 5497 states and 8729 transitions. [2023-11-19 08:06:20,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 546 [2023-11-19 08:06:20,239 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:06:20,239 INFO L195 NwaCegarLoop]: trace histogram [87, 87, 87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:06:20,263 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c1e78d-6b39-4793-bf71-7ff11b0f5229/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-19 08:06:20,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c1e78d-6b39-4793-bf71-7ff11b0f5229/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:06:20,458 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:06:20,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:20,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1263057270, now seen corresponding path program 1 times [2023-11-19 08:06:20,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:20,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299208864] [2023-11-19 08:06:20,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:20,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:20,554 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:06:20,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [831917328] [2023-11-19 08:06:20,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:20,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:06:20,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c1e78d-6b39-4793-bf71-7ff11b0f5229/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:20,556 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c1e78d-6b39-4793-bf71-7ff11b0f5229/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:06:20,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c1e78d-6b39-4793-bf71-7ff11b0f5229/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-19 08:06:21,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:21,058 INFO L262 TraceCheckSpWp]: Trace formula consists of 1263 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-19 08:06:21,071 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:06:25,081 INFO L134 CoverageAnalysis]: Checked inductivity of 14964 backedges. 7797 proven. 705 refuted. 0 times theorem prover too weak. 6462 trivial. 0 not checked. [2023-11-19 08:06:25,082 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:06:27,093 INFO L134 CoverageAnalysis]: Checked inductivity of 14964 backedges. 207 proven. 306 refuted. 0 times theorem prover too weak. 14451 trivial. 0 not checked. [2023-11-19 08:06:27,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:06:27,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299208864] [2023-11-19 08:06:27,094 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:06:27,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831917328] [2023-11-19 08:06:27,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831917328] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:06:27,094 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 08:06:27,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 22 [2023-11-19 08:06:27,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603047061] [2023-11-19 08:06:27,096 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 08:06:27,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-19 08:06:27,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:06:27,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-19 08:06:27,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2023-11-19 08:06:27,100 INFO L87 Difference]: Start difference. First operand 5497 states and 8729 transitions. Second operand has 22 states, 21 states have (on average 10.761904761904763) internal successors, (226), 21 states have internal predecessors, (226), 9 states have call successors, (174), 6 states have call predecessors, (174), 9 states have return successors, (174), 7 states have call predecessors, (174), 9 states have call successors, (174) [2023-11-19 08:06:29,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:06:29,108 INFO L93 Difference]: Finished difference Result 9567 states and 15051 transitions. [2023-11-19 08:06:29,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-19 08:06:29,109 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 10.761904761904763) internal successors, (226), 21 states have internal predecessors, (226), 9 states have call successors, (174), 6 states have call predecessors, (174), 9 states have return successors, (174), 7 states have call predecessors, (174), 9 states have call successors, (174) Word has length 545 [2023-11-19 08:06:29,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:06:29,150 INFO L225 Difference]: With dead ends: 9567 [2023-11-19 08:06:29,150 INFO L226 Difference]: Without dead ends: 4233 [2023-11-19 08:06:29,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1099 GetRequests, 1068 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=342, Invalid=714, Unknown=0, NotChecked=0, Total=1056 [2023-11-19 08:06:29,173 INFO L413 NwaCegarLoop]: 298 mSDtfsCounter, 759 mSDsluCounter, 1053 mSDsCounter, 0 mSdLazyCounter, 1139 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 791 SdHoareTripleChecker+Valid, 1351 SdHoareTripleChecker+Invalid, 1329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 1139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-19 08:06:29,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [791 Valid, 1351 Invalid, 1329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 1139 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-19 08:06:29,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4233 states. [2023-11-19 08:06:29,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4233 to 2405. [2023-11-19 08:06:29,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2405 states, 1580 states have (on average 1.4177215189873418) internal successors, (2240), 1589 states have internal predecessors, (2240), 751 states have call successors, (751), 73 states have call predecessors, (751), 73 states have return successors, (751), 742 states have call predecessors, (751), 751 states have call successors, (751) [2023-11-19 08:06:29,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2405 states to 2405 states and 3742 transitions. [2023-11-19 08:06:29,757 INFO L78 Accepts]: Start accepts. Automaton has 2405 states and 3742 transitions. Word has length 545 [2023-11-19 08:06:29,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:06:29,758 INFO L495 AbstractCegarLoop]: Abstraction has 2405 states and 3742 transitions. [2023-11-19 08:06:29,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 10.761904761904763) internal successors, (226), 21 states have internal predecessors, (226), 9 states have call successors, (174), 6 states have call predecessors, (174), 9 states have return successors, (174), 7 states have call predecessors, (174), 9 states have call successors, (174) [2023-11-19 08:06:29,759 INFO L276 IsEmpty]: Start isEmpty. Operand 2405 states and 3742 transitions. [2023-11-19 08:06:29,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 546 [2023-11-19 08:06:29,764 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:06:29,765 INFO L195 NwaCegarLoop]: trace histogram [87, 87, 87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:06:29,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c1e78d-6b39-4793-bf71-7ff11b0f5229/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-19 08:06:29,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c1e78d-6b39-4793-bf71-7ff11b0f5229/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-19 08:06:29,987 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:06:29,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:06:29,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1481911988, now seen corresponding path program 1 times [2023-11-19 08:06:29,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:06:29,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524117736] [2023-11-19 08:06:29,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:29,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:06:30,050 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:06:30,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [494595376] [2023-11-19 08:06:30,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:06:30,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:06:30,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c1e78d-6b39-4793-bf71-7ff11b0f5229/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:06:30,052 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c1e78d-6b39-4793-bf71-7ff11b0f5229/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:06:30,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7c1e78d-6b39-4793-bf71-7ff11b0f5229/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-19 08:06:30,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:06:30,534 INFO L262 TraceCheckSpWp]: Trace formula consists of 1261 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-19 08:06:30,550 INFO L285 TraceCheckSpWp]: Computing forward predicates...