./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-59.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cf887d9-3707-4187-b189-4a0d96d45dec/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cf887d9-3707-4187-b189-4a0d96d45dec/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_8cf887d9-3707-4187-b189-4a0d96d45dec/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cf887d9-3707-4187-b189-4a0d96d45dec/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-59.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cf887d9-3707-4187-b189-4a0d96d45dec/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_8cf887d9-3707-4187-b189-4a0d96d45dec/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 13f0d023cf70be0ab2bade1c9c2a45b94596f842e278edf3cfbd034e77d4c50c --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:41:51,169 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:41:51,290 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cf887d9-3707-4187-b189-4a0d96d45dec/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:41:51,302 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:41:51,303 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:41:51,345 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:41:51,349 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:41:51,349 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:41:51,351 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:41:51,357 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:41:51,358 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:41:51,359 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:41:51,359 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:41:51,361 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:41:51,362 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:41:51,362 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:41:51,362 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:41:51,363 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:41:51,363 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:41:51,364 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:41:51,364 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:41:51,365 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:41:51,365 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:41:51,366 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:41:51,366 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:41:51,367 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:41:51,368 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:41:51,368 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:41:51,369 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:41:51,369 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:41:51,371 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:41:51,371 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:41:51,371 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:41:51,372 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:41:51,372 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:41:51,372 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:41:51,372 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:41:51,372 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:41:51,373 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:41:51,373 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_8cf887d9-3707-4187-b189-4a0d96d45dec/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cf887d9-3707-4187-b189-4a0d96d45dec/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 13f0d023cf70be0ab2bade1c9c2a45b94596f842e278edf3cfbd034e77d4c50c [2023-11-19 07:41:51,673 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:41:51,718 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:41:51,720 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:41:51,721 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:41:51,722 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:41:51,723 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cf887d9-3707-4187-b189-4a0d96d45dec/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-59.i [2023-11-19 07:41:54,868 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:41:55,290 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:41:55,294 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cf887d9-3707-4187-b189-4a0d96d45dec/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-59.i [2023-11-19 07:41:55,315 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cf887d9-3707-4187-b189-4a0d96d45dec/bin/uautomizer-verify-uCwYo4JHxu/data/d39dc0eaa/0c6a325ed2274d82910ca44c12606398/FLAGefdf83ed0 [2023-11-19 07:41:55,334 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cf887d9-3707-4187-b189-4a0d96d45dec/bin/uautomizer-verify-uCwYo4JHxu/data/d39dc0eaa/0c6a325ed2274d82910ca44c12606398 [2023-11-19 07:41:55,344 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:41:55,345 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:41:55,352 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:41:55,352 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:41:55,358 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:41:55,359 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:41:55" (1/1) ... [2023-11-19 07:41:55,360 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4eb26a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:55, skipping insertion in model container [2023-11-19 07:41:55,361 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:41:55" (1/1) ... [2023-11-19 07:41:55,432 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:41:55,605 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_8cf887d9-3707-4187-b189-4a0d96d45dec/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-59.i[916,929] [2023-11-19 07:41:55,768 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:41:55,794 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:41:55,808 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_8cf887d9-3707-4187-b189-4a0d96d45dec/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-59.i[916,929] [2023-11-19 07:41:55,916 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:41:55,953 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:41:55,954 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:55 WrapperNode [2023-11-19 07:41:55,954 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:41:55,955 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:41:55,956 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:41:55,956 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:41:55,964 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:55" (1/1) ... [2023-11-19 07:41:55,985 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:55" (1/1) ... [2023-11-19 07:41:56,049 INFO L138 Inliner]: procedures = 26, calls = 72, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 455 [2023-11-19 07:41:56,049 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:41:56,050 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:41:56,050 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:41:56,051 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:41:56,062 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:55" (1/1) ... [2023-11-19 07:41:56,062 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:55" (1/1) ... [2023-11-19 07:41:56,084 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:55" (1/1) ... [2023-11-19 07:41:56,089 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:55" (1/1) ... [2023-11-19 07:41:56,123 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:55" (1/1) ... [2023-11-19 07:41:56,148 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:55" (1/1) ... [2023-11-19 07:41:56,159 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:55" (1/1) ... [2023-11-19 07:41:56,166 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:55" (1/1) ... [2023-11-19 07:41:56,181 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:41:56,182 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:41:56,183 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:41:56,183 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:41:56,184 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:55" (1/1) ... [2023-11-19 07:41:56,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:41:56,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cf887d9-3707-4187-b189-4a0d96d45dec/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:56,234 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cf887d9-3707-4187-b189-4a0d96d45dec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:41:56,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cf887d9-3707-4187-b189-4a0d96d45dec/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:41:56,294 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:41:56,294 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-19 07:41:56,295 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-19 07:41:56,295 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:41:56,296 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:41:56,296 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:41:56,479 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:41:56,481 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:41:57,556 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:41:57,573 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:41:57,573 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 07:41:57,584 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:41:57 BoogieIcfgContainer [2023-11-19 07:41:57,585 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:41:57,590 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:41:57,591 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:41:57,594 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:41:57,594 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:41:55" (1/3) ... [2023-11-19 07:41:57,595 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e52ea61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:41:57, skipping insertion in model container [2023-11-19 07:41:57,595 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:41:55" (2/3) ... [2023-11-19 07:41:57,597 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e52ea61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:41:57, skipping insertion in model container [2023-11-19 07:41:57,597 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:41:57" (3/3) ... [2023-11-19 07:41:57,599 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodesize_ps-cn-250_file-59.i [2023-11-19 07:41:57,620 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:41:57,621 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:41:57,683 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:41:57,691 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;@2dcffd56, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:41:57,692 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 07:41:57,699 INFO L276 IsEmpty]: Start isEmpty. Operand has 189 states, 127 states have (on average 1.5826771653543308) internal successors, (201), 128 states have internal predecessors, (201), 59 states have call successors, (59), 1 states have call predecessors, (59), 1 states have return successors, (59), 59 states have call predecessors, (59), 59 states have call successors, (59) [2023-11-19 07:41:57,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 382 [2023-11-19 07:41:57,727 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:41:57,728 INFO L195 NwaCegarLoop]: trace histogram [59, 59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:41:57,729 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:41:57,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:57,734 INFO L85 PathProgramCache]: Analyzing trace with hash -852587558, now seen corresponding path program 1 times [2023-11-19 07:41:57,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:57,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722116603] [2023-11-19 07:41:57,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:57,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:58,178 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:41:58,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [644222195] [2023-11-19 07:41:58,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:58,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:41:58,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cf887d9-3707-4187-b189-4a0d96d45dec/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:58,185 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cf887d9-3707-4187-b189-4a0d96d45dec/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:41:58,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cf887d9-3707-4187-b189-4a0d96d45dec/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:41:58,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:58,567 INFO L262 TraceCheckSpWp]: Trace formula consists of 918 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 07:41:58,595 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:41:58,779 INFO L134 CoverageAnalysis]: Checked inductivity of 6844 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6844 trivial. 0 not checked. [2023-11-19 07:41:58,780 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:41:58,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:58,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722116603] [2023-11-19 07:41:58,781 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:41:58,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644222195] [2023-11-19 07:41:58,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644222195] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:41:58,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:41:58,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:41:58,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803581119] [2023-11-19 07:41:58,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:41:58,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:41:58,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:58,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:41:58,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:41:58,848 INFO L87 Difference]: Start difference. First operand has 189 states, 127 states have (on average 1.5826771653543308) internal successors, (201), 128 states have internal predecessors, (201), 59 states have call successors, (59), 1 states have call predecessors, (59), 1 states have return successors, (59), 59 states have call predecessors, (59), 59 states have call successors, (59) Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 1 states have call successors, (59), 1 states have call predecessors, (59), 1 states have return successors, (59), 1 states have call predecessors, (59), 1 states have call successors, (59) [2023-11-19 07:41:59,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:41:59,097 INFO L93 Difference]: Finished difference Result 492 states and 930 transitions. [2023-11-19 07:41:59,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:41:59,100 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 1 states have call successors, (59), 1 states have call predecessors, (59), 1 states have return successors, (59), 1 states have call predecessors, (59), 1 states have call successors, (59) Word has length 381 [2023-11-19 07:41:59,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:41:59,130 INFO L225 Difference]: With dead ends: 492 [2023-11-19 07:41:59,131 INFO L226 Difference]: Without dead ends: 306 [2023-11-19 07:41:59,136 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 379 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 07:41:59,140 INFO L413 NwaCegarLoop]: 301 mSDtfsCounter, 177 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:41:59,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 587 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:41:59,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2023-11-19 07:41:59,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 303. [2023-11-19 07:41:59,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 213 states have (on average 1.5774647887323943) internal successors, (336), 214 states have internal predecessors, (336), 87 states have call successors, (87), 2 states have call predecessors, (87), 2 states have return successors, (87), 86 states have call predecessors, (87), 87 states have call successors, (87) [2023-11-19 07:41:59,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 510 transitions. [2023-11-19 07:41:59,234 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 510 transitions. Word has length 381 [2023-11-19 07:41:59,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:41:59,237 INFO L495 AbstractCegarLoop]: Abstraction has 303 states and 510 transitions. [2023-11-19 07:41:59,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 1 states have call successors, (59), 1 states have call predecessors, (59), 1 states have return successors, (59), 1 states have call predecessors, (59), 1 states have call successors, (59) [2023-11-19 07:41:59,237 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 510 transitions. [2023-11-19 07:41:59,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 382 [2023-11-19 07:41:59,248 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:41:59,248 INFO L195 NwaCegarLoop]: trace histogram [59, 59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:41:59,277 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cf887d9-3707-4187-b189-4a0d96d45dec/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:41:59,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cf887d9-3707-4187-b189-4a0d96d45dec/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:41:59,465 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:41:59,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:59,466 INFO L85 PathProgramCache]: Analyzing trace with hash 585693394, now seen corresponding path program 1 times [2023-11-19 07:41:59,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:59,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512803508] [2023-11-19 07:41:59,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:59,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:59,595 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:41:59,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [730480422] [2023-11-19 07:41:59,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:59,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:41:59,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cf887d9-3707-4187-b189-4a0d96d45dec/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:59,602 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cf887d9-3707-4187-b189-4a0d96d45dec/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:41:59,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cf887d9-3707-4187-b189-4a0d96d45dec/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:41:59,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:59,942 INFO L262 TraceCheckSpWp]: Trace formula consists of 916 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 07:41:59,962 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:42:01,426 INFO L134 CoverageAnalysis]: Checked inductivity of 6844 backedges. 3499 proven. 21 refuted. 0 times theorem prover too weak. 3324 trivial. 0 not checked. [2023-11-19 07:42:01,427 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:42:02,263 INFO L134 CoverageAnalysis]: Checked inductivity of 6844 backedges. 153 proven. 21 refuted. 0 times theorem prover too weak. 6670 trivial. 0 not checked. [2023-11-19 07:42:02,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:42:02,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512803508] [2023-11-19 07:42:02,264 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:42:02,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730480422] [2023-11-19 07:42:02,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730480422] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:42:02,265 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:42:02,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2023-11-19 07:42:02,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943058019] [2023-11-19 07:42:02,266 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:42:02,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 07:42:02,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:42:02,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 07:42:02,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-11-19 07:42:02,271 INFO L87 Difference]: Start difference. First operand 303 states and 510 transitions. Second operand has 12 states, 12 states have (on average 14.25) internal successors, (171), 12 states have internal predecessors, (171), 6 states have call successors, (118), 4 states have call predecessors, (118), 6 states have return successors, (118), 6 states have call predecessors, (118), 6 states have call successors, (118) [2023-11-19 07:42:03,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:42:03,802 INFO L93 Difference]: Finished difference Result 1103 states and 1848 transitions. [2023-11-19 07:42:03,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-19 07:42:03,803 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 14.25) internal successors, (171), 12 states have internal predecessors, (171), 6 states have call successors, (118), 4 states have call predecessors, (118), 6 states have return successors, (118), 6 states have call predecessors, (118), 6 states have call successors, (118) Word has length 381 [2023-11-19 07:42:03,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:42:03,812 INFO L225 Difference]: With dead ends: 1103 [2023-11-19 07:42:03,813 INFO L226 Difference]: Without dead ends: 803 [2023-11-19 07:42:03,815 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 764 GetRequests, 750 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2023-11-19 07:42:03,816 INFO L413 NwaCegarLoop]: 239 mSDtfsCounter, 956 mSDsluCounter, 1275 mSDsCounter, 0 mSdLazyCounter, 968 mSolverCounterSat, 323 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1053 SdHoareTripleChecker+Valid, 1514 SdHoareTripleChecker+Invalid, 1291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 323 IncrementalHoareTripleChecker+Valid, 968 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-19 07:42:03,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1053 Valid, 1514 Invalid, 1291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [323 Valid, 968 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-19 07:42:03,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 803 states. [2023-11-19 07:42:03,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 803 to 605. [2023-11-19 07:42:03,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 425 states have (on average 1.5741176470588236) internal successors, (669), 427 states have internal predecessors, (669), 174 states have call successors, (174), 5 states have call predecessors, (174), 5 states have return successors, (174), 172 states have call predecessors, (174), 174 states have call successors, (174) [2023-11-19 07:42:03,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 1017 transitions. [2023-11-19 07:42:03,985 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 1017 transitions. Word has length 381 [2023-11-19 07:42:03,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:42:03,988 INFO L495 AbstractCegarLoop]: Abstraction has 605 states and 1017 transitions. [2023-11-19 07:42:03,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 14.25) internal successors, (171), 12 states have internal predecessors, (171), 6 states have call successors, (118), 4 states have call predecessors, (118), 6 states have return successors, (118), 6 states have call predecessors, (118), 6 states have call successors, (118) [2023-11-19 07:42:03,989 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 1017 transitions. [2023-11-19 07:42:03,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 383 [2023-11-19 07:42:03,999 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:42:03,999 INFO L195 NwaCegarLoop]: trace histogram [59, 59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:42:04,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cf887d9-3707-4187-b189-4a0d96d45dec/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:42:04,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cf887d9-3707-4187-b189-4a0d96d45dec/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:42:04,224 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:42:04,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:42:04,225 INFO L85 PathProgramCache]: Analyzing trace with hash -331729680, now seen corresponding path program 1 times [2023-11-19 07:42:04,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:42:04,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412296234] [2023-11-19 07:42:04,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:04,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:42:04,303 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:42:04,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1328524129] [2023-11-19 07:42:04,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:04,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:42:04,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cf887d9-3707-4187-b189-4a0d96d45dec/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:42:04,305 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cf887d9-3707-4187-b189-4a0d96d45dec/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:42:04,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cf887d9-3707-4187-b189-4a0d96d45dec/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:42:04,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:04,637 INFO L262 TraceCheckSpWp]: Trace formula consists of 917 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 07:42:04,645 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:42:04,806 INFO L134 CoverageAnalysis]: Checked inductivity of 6844 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6844 trivial. 0 not checked. [2023-11-19 07:42:04,807 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:42:04,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:42:04,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412296234] [2023-11-19 07:42:04,807 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:42:04,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328524129] [2023-11-19 07:42:04,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328524129] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:42:04,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:42:04,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:42:04,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522294831] [2023-11-19 07:42:04,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:42:04,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:42:04,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:42:04,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:42:04,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:42:04,813 INFO L87 Difference]: Start difference. First operand 605 states and 1017 transitions. Second operand has 5 states, 5 states have (on average 18.0) internal successors, (90), 5 states have internal predecessors, (90), 1 states have call successors, (59), 1 states have call predecessors, (59), 1 states have return successors, (59), 1 states have call predecessors, (59), 1 states have call successors, (59) [2023-11-19 07:42:05,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:42:05,196 INFO L93 Difference]: Finished difference Result 1977 states and 3339 transitions. [2023-11-19 07:42:05,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:42:05,197 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.0) internal successors, (90), 5 states have internal predecessors, (90), 1 states have call successors, (59), 1 states have call predecessors, (59), 1 states have return successors, (59), 1 states have call predecessors, (59), 1 states have call successors, (59) Word has length 382 [2023-11-19 07:42:05,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:42:05,210 INFO L225 Difference]: With dead ends: 1977 [2023-11-19 07:42:05,210 INFO L226 Difference]: Without dead ends: 1375 [2023-11-19 07:42:05,213 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:42:05,216 INFO L413 NwaCegarLoop]: 337 mSDtfsCounter, 397 mSDsluCounter, 677 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 397 SdHoareTripleChecker+Valid, 1014 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 07:42:05,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [397 Valid, 1014 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 07:42:05,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1375 states. [2023-11-19 07:42:05,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1375 to 1167. [2023-11-19 07:42:05,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1167 states, 927 states have (on average 1.6645091693635383) internal successors, (1543), 933 states have internal predecessors, (1543), 230 states have call successors, (230), 9 states have call predecessors, (230), 9 states have return successors, (230), 224 states have call predecessors, (230), 230 states have call successors, (230) [2023-11-19 07:42:05,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1167 states to 1167 states and 2003 transitions. [2023-11-19 07:42:05,384 INFO L78 Accepts]: Start accepts. Automaton has 1167 states and 2003 transitions. Word has length 382 [2023-11-19 07:42:05,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:42:05,391 INFO L495 AbstractCegarLoop]: Abstraction has 1167 states and 2003 transitions. [2023-11-19 07:42:05,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.0) internal successors, (90), 5 states have internal predecessors, (90), 1 states have call successors, (59), 1 states have call predecessors, (59), 1 states have return successors, (59), 1 states have call predecessors, (59), 1 states have call successors, (59) [2023-11-19 07:42:05,391 INFO L276 IsEmpty]: Start isEmpty. Operand 1167 states and 2003 transitions. [2023-11-19 07:42:05,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 383 [2023-11-19 07:42:05,401 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:42:05,401 INFO L195 NwaCegarLoop]: trace histogram [59, 59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:42:05,433 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cf887d9-3707-4187-b189-4a0d96d45dec/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:42:05,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cf887d9-3707-4187-b189-4a0d96d45dec/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:42:05,612 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:42:05,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:42:05,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1611593358, now seen corresponding path program 1 times [2023-11-19 07:42:05,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:42:05,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869639439] [2023-11-19 07:42:05,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:05,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:42:05,718 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:42:05,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [687507589] [2023-11-19 07:42:05,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:05,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:42:05,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cf887d9-3707-4187-b189-4a0d96d45dec/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:42:05,720 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cf887d9-3707-4187-b189-4a0d96d45dec/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:42:05,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cf887d9-3707-4187-b189-4a0d96d45dec/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:42:06,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:06,062 INFO L262 TraceCheckSpWp]: Trace formula consists of 915 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:42:06,072 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:42:06,603 INFO L134 CoverageAnalysis]: Checked inductivity of 6844 backedges. 2778 proven. 126 refuted. 0 times theorem prover too weak. 3940 trivial. 0 not checked. [2023-11-19 07:42:06,603 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:42:06,975 INFO L134 CoverageAnalysis]: Checked inductivity of 6844 backedges. 48 proven. 126 refuted. 0 times theorem prover too weak. 6670 trivial. 0 not checked. [2023-11-19 07:42:06,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:42:06,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869639439] [2023-11-19 07:42:06,976 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:42:06,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687507589] [2023-11-19 07:42:06,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687507589] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:42:06,977 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:42:06,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-19 07:42:06,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96397073] [2023-11-19 07:42:06,978 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:42:06,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:42:06,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:42:06,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:42:06,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:42:06,983 INFO L87 Difference]: Start difference. First operand 1167 states and 2003 transitions. Second operand has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 3 states have call successors, (101), 2 states have call predecessors, (101), 4 states have return successors, (102), 3 states have call predecessors, (102), 3 states have call successors, (102) [2023-11-19 07:42:07,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:42:07,552 INFO L93 Difference]: Finished difference Result 2363 states and 4031 transitions. [2023-11-19 07:42:07,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 07:42:07,553 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 3 states have call successors, (101), 2 states have call predecessors, (101), 4 states have return successors, (102), 3 states have call predecessors, (102), 3 states have call successors, (102) Word has length 382 [2023-11-19 07:42:07,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:42:07,563 INFO L225 Difference]: With dead ends: 2363 [2023-11-19 07:42:07,564 INFO L226 Difference]: Without dead ends: 1199 [2023-11-19 07:42:07,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 766 GetRequests, 756 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-11-19 07:42:07,571 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 332 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 07:42:07,572 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [348 Valid, 529 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 393 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 07:42:07,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1199 states. [2023-11-19 07:42:07,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1199 to 1183. [2023-11-19 07:42:07,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1183 states, 939 states have (on average 1.643237486687966) internal successors, (1543), 945 states have internal predecessors, (1543), 230 states have call successors, (230), 13 states have call predecessors, (230), 13 states have return successors, (230), 224 states have call predecessors, (230), 230 states have call successors, (230) [2023-11-19 07:42:07,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1183 states to 1183 states and 2003 transitions. [2023-11-19 07:42:07,760 INFO L78 Accepts]: Start accepts. Automaton has 1183 states and 2003 transitions. Word has length 382 [2023-11-19 07:42:07,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:42:07,762 INFO L495 AbstractCegarLoop]: Abstraction has 1183 states and 2003 transitions. [2023-11-19 07:42:07,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 3 states have call successors, (101), 2 states have call predecessors, (101), 4 states have return successors, (102), 3 states have call predecessors, (102), 3 states have call successors, (102) [2023-11-19 07:42:07,762 INFO L276 IsEmpty]: Start isEmpty. Operand 1183 states and 2003 transitions. [2023-11-19 07:42:07,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2023-11-19 07:42:07,775 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:42:07,775 INFO L195 NwaCegarLoop]: trace histogram [59, 59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:42:07,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cf887d9-3707-4187-b189-4a0d96d45dec/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:42:07,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cf887d9-3707-4187-b189-4a0d96d45dec/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-11-19 07:42:07,999 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:42:08,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:42:08,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1144803834, now seen corresponding path program 1 times [2023-11-19 07:42:08,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:42:08,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596484205] [2023-11-19 07:42:08,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:08,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:42:08,080 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:42:08,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2090849694] [2023-11-19 07:42:08,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:08,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:42:08,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cf887d9-3707-4187-b189-4a0d96d45dec/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:42:08,082 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cf887d9-3707-4187-b189-4a0d96d45dec/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:42:08,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cf887d9-3707-4187-b189-4a0d96d45dec/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:42:08,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:08,398 INFO L262 TraceCheckSpWp]: Trace formula consists of 918 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 07:42:08,410 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:42:09,127 INFO L134 CoverageAnalysis]: Checked inductivity of 6844 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6844 trivial. 0 not checked. [2023-11-19 07:42:09,129 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:42:09,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:42:09,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596484205] [2023-11-19 07:42:09,132 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:42:09,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090849694] [2023-11-19 07:42:09,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090849694] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:42:09,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:42:09,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 07:42:09,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833982224] [2023-11-19 07:42:09,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:42:09,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:42:09,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:42:09,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:42:09,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=5, Unknown=1, NotChecked=0, Total=12 [2023-11-19 07:42:09,143 INFO L87 Difference]: Start difference. First operand 1183 states and 2003 transitions. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 1 states have call successors, (59), 1 states have call predecessors, (59), 1 states have return successors, (59), 1 states have call predecessors, (59), 1 states have call successors, (59) [2023-11-19 07:42:10,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:42:10,383 INFO L93 Difference]: Finished difference Result 3661 states and 6167 transitions. [2023-11-19 07:42:10,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:42:10,385 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 1 states have call successors, (59), 1 states have call predecessors, (59), 1 states have return successors, (59), 1 states have call predecessors, (59), 1 states have call successors, (59) Word has length 383 [2023-11-19 07:42:10,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:42:10,404 INFO L225 Difference]: With dead ends: 3661 [2023-11-19 07:42:10,404 INFO L226 Difference]: Without dead ends: 2481 [2023-11-19 07:42:10,408 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 380 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=5, Unknown=1, NotChecked=0, Total=12 [2023-11-19 07:42:10,409 INFO L413 NwaCegarLoop]: 469 mSDtfsCounter, 338 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 0 mSolverCounterUnsat, 124 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 765 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 124 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-19 07:42:10,410 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [338 Valid, 765 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 74 Invalid, 124 Unknown, 0 Unchecked, 0.9s Time] [2023-11-19 07:42:10,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2481 states. [2023-11-19 07:42:10,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2481 to 1271. [2023-11-19 07:42:10,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1271 states, 1027 states have (on average 1.6504381694255112) internal successors, (1695), 1033 states have internal predecessors, (1695), 230 states have call successors, (230), 13 states have call predecessors, (230), 13 states have return successors, (230), 224 states have call predecessors, (230), 230 states have call successors, (230) [2023-11-19 07:42:10,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1271 states to 1271 states and 2155 transitions. [2023-11-19 07:42:10,592 INFO L78 Accepts]: Start accepts. Automaton has 1271 states and 2155 transitions. Word has length 383 [2023-11-19 07:42:10,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:42:10,593 INFO L495 AbstractCegarLoop]: Abstraction has 1271 states and 2155 transitions. [2023-11-19 07:42:10,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 1 states have call successors, (59), 1 states have call predecessors, (59), 1 states have return successors, (59), 1 states have call predecessors, (59), 1 states have call successors, (59) [2023-11-19 07:42:10,593 INFO L276 IsEmpty]: Start isEmpty. Operand 1271 states and 2155 transitions. [2023-11-19 07:42:10,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2023-11-19 07:42:10,602 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:42:10,603 INFO L195 NwaCegarLoop]: trace histogram [59, 59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:42:10,625 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cf887d9-3707-4187-b189-4a0d96d45dec/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 07:42:10,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cf887d9-3707-4187-b189-4a0d96d45dec/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:42:10,819 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:42:10,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:42:10,820 INFO L85 PathProgramCache]: Analyzing trace with hash -721157112, now seen corresponding path program 1 times [2023-11-19 07:42:10,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:42:10,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254922827] [2023-11-19 07:42:10,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:10,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:42:10,882 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:42:10,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1872738409] [2023-11-19 07:42:10,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:10,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:42:10,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cf887d9-3707-4187-b189-4a0d96d45dec/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:42:10,884 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cf887d9-3707-4187-b189-4a0d96d45dec/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:42:10,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cf887d9-3707-4187-b189-4a0d96d45dec/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 07:42:11,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:11,286 INFO L262 TraceCheckSpWp]: Trace formula consists of 916 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 07:42:11,303 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:42:11,788 INFO L134 CoverageAnalysis]: Checked inductivity of 6844 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6844 trivial. 0 not checked. [2023-11-19 07:42:11,788 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:42:11,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:42:11,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254922827] [2023-11-19 07:42:11,789 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:42:11,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872738409] [2023-11-19 07:42:11,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872738409] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:42:11,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:42:11,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:42:11,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679898618] [2023-11-19 07:42:11,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:42:11,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:42:11,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:42:11,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:42:11,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:42:11,792 INFO L87 Difference]: Start difference. First operand 1271 states and 2155 transitions. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 3 states have internal predecessors, (91), 1 states have call successors, (59), 1 states have call predecessors, (59), 1 states have return successors, (59), 1 states have call predecessors, (59), 1 states have call successors, (59) [2023-11-19 07:42:12,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:42:12,234 INFO L93 Difference]: Finished difference Result 3282 states and 5581 transitions. [2023-11-19 07:42:12,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:42:12,236 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 3 states have internal predecessors, (91), 1 states have call successors, (59), 1 states have call predecessors, (59), 1 states have return successors, (59), 1 states have call predecessors, (59), 1 states have call successors, (59) Word has length 383 [2023-11-19 07:42:12,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:42:12,252 INFO L225 Difference]: With dead ends: 3282 [2023-11-19 07:42:12,253 INFO L226 Difference]: Without dead ends: 2014 [2023-11-19 07:42:12,257 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 380 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 07:42:12,258 INFO L413 NwaCegarLoop]: 307 mSDtfsCounter, 279 mSDsluCounter, 607 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 914 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 07:42:12,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [279 Valid, 914 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 07:42:12,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2014 states. [2023-11-19 07:42:12,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2014 to 1876. [2023-11-19 07:42:12,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1876 states, 1568 states have (on average 1.6747448979591837) internal successors, (2626), 1574 states have internal predecessors, (2626), 289 states have call successors, (289), 18 states have call predecessors, (289), 18 states have return successors, (289), 283 states have call predecessors, (289), 289 states have call successors, (289) [2023-11-19 07:42:12,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1876 states to 1876 states and 3204 transitions. [2023-11-19 07:42:12,515 INFO L78 Accepts]: Start accepts. Automaton has 1876 states and 3204 transitions. Word has length 383 [2023-11-19 07:42:12,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:42:12,516 INFO L495 AbstractCegarLoop]: Abstraction has 1876 states and 3204 transitions. [2023-11-19 07:42:12,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 3 states have internal predecessors, (91), 1 states have call successors, (59), 1 states have call predecessors, (59), 1 states have return successors, (59), 1 states have call predecessors, (59), 1 states have call successors, (59) [2023-11-19 07:42:12,517 INFO L276 IsEmpty]: Start isEmpty. Operand 1876 states and 3204 transitions. [2023-11-19 07:42:12,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 385 [2023-11-19 07:42:12,527 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:42:12,527 INFO L195 NwaCegarLoop]: trace histogram [59, 59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:42:12,564 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cf887d9-3707-4187-b189-4a0d96d45dec/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 07:42:12,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cf887d9-3707-4187-b189-4a0d96d45dec/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:42:12,753 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:42:12,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:42:12,754 INFO L85 PathProgramCache]: Analyzing trace with hash 976747635, now seen corresponding path program 1 times [2023-11-19 07:42:12,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:42:12,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414726025] [2023-11-19 07:42:12,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:12,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:42:12,812 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:42:12,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1864807412] [2023-11-19 07:42:12,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:12,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:42:12,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cf887d9-3707-4187-b189-4a0d96d45dec/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:42:12,814 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cf887d9-3707-4187-b189-4a0d96d45dec/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:42:12,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cf887d9-3707-4187-b189-4a0d96d45dec/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 07:42:13,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:13,205 INFO L262 TraceCheckSpWp]: Trace formula consists of 916 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 07:42:13,214 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:42:13,797 INFO L134 CoverageAnalysis]: Checked inductivity of 6844 backedges. 2952 proven. 0 refuted. 0 times theorem prover too weak. 3892 trivial. 0 not checked. [2023-11-19 07:42:13,797 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:42:13,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:42:13,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414726025] [2023-11-19 07:42:13,798 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:42:13,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864807412] [2023-11-19 07:42:13,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864807412] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:42:13,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:42:13,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:42:13,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503444385] [2023-11-19 07:42:13,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:42:13,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:42:13,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:42:13,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:42:13,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:42:13,801 INFO L87 Difference]: Start difference. First operand 1876 states and 3204 transitions. Second operand has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 2 states have call successors, (59), 2 states have call predecessors, (59), 2 states have return successors, (59), 2 states have call predecessors, (59), 2 states have call successors, (59) [2023-11-19 07:42:14,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:42:14,617 INFO L93 Difference]: Finished difference Result 4317 states and 7383 transitions. [2023-11-19 07:42:14,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:42:14,619 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 2 states have call successors, (59), 2 states have call predecessors, (59), 2 states have return successors, (59), 2 states have call predecessors, (59), 2 states have call successors, (59) Word has length 384 [2023-11-19 07:42:14,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:42:14,641 INFO L225 Difference]: With dead ends: 4317 [2023-11-19 07:42:14,642 INFO L226 Difference]: Without dead ends: 3025 [2023-11-19 07:42:14,646 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 380 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:42:14,648 INFO L413 NwaCegarLoop]: 328 mSDtfsCounter, 655 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 655 SdHoareTripleChecker+Valid, 664 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 07:42:14,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [655 Valid, 664 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 07:42:14,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3025 states. [2023-11-19 07:42:14,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3025 to 2354. [2023-11-19 07:42:14,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2354 states, 2046 states have (on average 1.7135874877810362) internal successors, (3506), 2052 states have internal predecessors, (3506), 289 states have call successors, (289), 18 states have call predecessors, (289), 18 states have return successors, (289), 283 states have call predecessors, (289), 289 states have call successors, (289) [2023-11-19 07:42:14,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2354 states to 2354 states and 4084 transitions. [2023-11-19 07:42:14,904 INFO L78 Accepts]: Start accepts. Automaton has 2354 states and 4084 transitions. Word has length 384 [2023-11-19 07:42:14,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:42:14,905 INFO L495 AbstractCegarLoop]: Abstraction has 2354 states and 4084 transitions. [2023-11-19 07:42:14,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 2 states have call successors, (59), 2 states have call predecessors, (59), 2 states have return successors, (59), 2 states have call predecessors, (59), 2 states have call successors, (59) [2023-11-19 07:42:14,905 INFO L276 IsEmpty]: Start isEmpty. Operand 2354 states and 4084 transitions. [2023-11-19 07:42:14,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 385 [2023-11-19 07:42:14,915 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:42:14,915 INFO L195 NwaCegarLoop]: trace histogram [59, 59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:42:14,943 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cf887d9-3707-4187-b189-4a0d96d45dec/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 07:42:15,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cf887d9-3707-4187-b189-4a0d96d45dec/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:42:15,139 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:42:15,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:42:15,140 INFO L85 PathProgramCache]: Analyzing trace with hash 686202029, now seen corresponding path program 1 times [2023-11-19 07:42:15,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:42:15,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951334127] [2023-11-19 07:42:15,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:15,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:42:15,200 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:42:15,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [826566127] [2023-11-19 07:42:15,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:15,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:42:15,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cf887d9-3707-4187-b189-4a0d96d45dec/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:42:15,202 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cf887d9-3707-4187-b189-4a0d96d45dec/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:42:15,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cf887d9-3707-4187-b189-4a0d96d45dec/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 07:42:15,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:15,596 INFO L262 TraceCheckSpWp]: Trace formula consists of 920 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-19 07:42:15,607 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:42:18,395 INFO L134 CoverageAnalysis]: Checked inductivity of 6844 backedges. 724 proven. 165 refuted. 0 times theorem prover too weak. 5955 trivial. 0 not checked. [2023-11-19 07:42:18,395 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:42:19,641 INFO L134 CoverageAnalysis]: Checked inductivity of 6844 backedges. 9 proven. 165 refuted. 0 times theorem prover too weak. 6670 trivial. 0 not checked. [2023-11-19 07:42:19,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:42:19,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951334127] [2023-11-19 07:42:19,642 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:42:19,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826566127] [2023-11-19 07:42:19,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826566127] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:42:19,642 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:42:19,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2023-11-19 07:42:19,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24327123] [2023-11-19 07:42:19,643 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:42:19,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-19 07:42:19,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:42:19,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-19 07:42:19,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2023-11-19 07:42:19,647 INFO L87 Difference]: Start difference. First operand 2354 states and 4084 transitions. Second operand has 14 states, 14 states have (on average 13.0) internal successors, (182), 14 states have internal predecessors, (182), 4 states have call successors, (118), 3 states have call predecessors, (118), 5 states have return successors, (118), 4 states have call predecessors, (118), 4 states have call successors, (118) [2023-11-19 07:42:21,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:42:21,824 INFO L93 Difference]: Finished difference Result 4130 states and 7070 transitions. [2023-11-19 07:42:21,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-19 07:42:21,825 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 13.0) internal successors, (182), 14 states have internal predecessors, (182), 4 states have call successors, (118), 3 states have call predecessors, (118), 5 states have return successors, (118), 4 states have call predecessors, (118), 4 states have call successors, (118) Word has length 384 [2023-11-19 07:42:21,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:42:21,844 INFO L225 Difference]: With dead ends: 4130 [2023-11-19 07:42:21,844 INFO L226 Difference]: Without dead ends: 2590 [2023-11-19 07:42:21,849 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 786 GetRequests, 758 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=253, Invalid=617, Unknown=0, NotChecked=0, Total=870 [2023-11-19 07:42:21,851 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 1077 mSDsluCounter, 1031 mSDsCounter, 0 mSdLazyCounter, 883 mSolverCounterSat, 510 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1077 SdHoareTripleChecker+Valid, 1265 SdHoareTripleChecker+Invalid, 1393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 510 IncrementalHoareTripleChecker+Valid, 883 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-19 07:42:21,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1077 Valid, 1265 Invalid, 1393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [510 Valid, 883 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-19 07:42:21,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2590 states. [2023-11-19 07:42:22,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2590 to 2558. [2023-11-19 07:42:22,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2558 states, 2217 states have (on average 1.6874154262516914) internal successors, (3741), 2231 states have internal predecessors, (3741), 313 states have call successors, (313), 27 states have call predecessors, (313), 27 states have return successors, (313), 299 states have call predecessors, (313), 313 states have call successors, (313) [2023-11-19 07:42:22,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2558 states to 2558 states and 4367 transitions. [2023-11-19 07:42:22,194 INFO L78 Accepts]: Start accepts. Automaton has 2558 states and 4367 transitions. Word has length 384 [2023-11-19 07:42:22,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:42:22,195 INFO L495 AbstractCegarLoop]: Abstraction has 2558 states and 4367 transitions. [2023-11-19 07:42:22,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 13.0) internal successors, (182), 14 states have internal predecessors, (182), 4 states have call successors, (118), 3 states have call predecessors, (118), 5 states have return successors, (118), 4 states have call predecessors, (118), 4 states have call successors, (118) [2023-11-19 07:42:22,196 INFO L276 IsEmpty]: Start isEmpty. Operand 2558 states and 4367 transitions. [2023-11-19 07:42:22,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 385 [2023-11-19 07:42:22,201 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:42:22,202 INFO L195 NwaCegarLoop]: trace histogram [59, 59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:42:22,234 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cf887d9-3707-4187-b189-4a0d96d45dec/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-19 07:42:22,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cf887d9-3707-4187-b189-4a0d96d45dec/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:42:22,425 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:42:22,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:42:22,426 INFO L85 PathProgramCache]: Analyzing trace with hash 428036591, now seen corresponding path program 1 times [2023-11-19 07:42:22,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:42:22,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216455115] [2023-11-19 07:42:22,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:22,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:42:22,501 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:42:22,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [24041568] [2023-11-19 07:42:22,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:22,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:42:22,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cf887d9-3707-4187-b189-4a0d96d45dec/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:42:22,503 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cf887d9-3707-4187-b189-4a0d96d45dec/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:42:22,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cf887d9-3707-4187-b189-4a0d96d45dec/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 07:42:22,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:22,900 INFO L262 TraceCheckSpWp]: Trace formula consists of 920 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 07:42:22,909 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:42:23,334 INFO L134 CoverageAnalysis]: Checked inductivity of 6844 backedges. 2952 proven. 0 refuted. 0 times theorem prover too weak. 3892 trivial. 0 not checked. [2023-11-19 07:42:23,334 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:42:23,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:42:23,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216455115] [2023-11-19 07:42:23,335 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:42:23,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24041568] [2023-11-19 07:42:23,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24041568] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:42:23,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:42:23,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 07:42:23,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225059326] [2023-11-19 07:42:23,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:42:23,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 07:42:23,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:42:23,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:42:23,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:42:23,343 INFO L87 Difference]: Start difference. First operand 2558 states and 4367 transitions. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 2 states have call successors, (59), 2 states have call predecessors, (59), 2 states have return successors, (59), 2 states have call predecessors, (59), 2 states have call successors, (59) [2023-11-19 07:42:24,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:42:24,574 INFO L93 Difference]: Finished difference Result 5055 states and 8450 transitions. [2023-11-19 07:42:24,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 07:42:24,575 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 2 states have call successors, (59), 2 states have call predecessors, (59), 2 states have return successors, (59), 2 states have call predecessors, (59), 2 states have call successors, (59) Word has length 384 [2023-11-19 07:42:24,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:42:24,599 INFO L225 Difference]: With dead ends: 5055 [2023-11-19 07:42:24,600 INFO L226 Difference]: Without dead ends: 3286 [2023-11-19 07:42:24,605 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 380 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:42:24,608 INFO L413 NwaCegarLoop]: 433 mSDtfsCounter, 638 mSDsluCounter, 706 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 638 SdHoareTripleChecker+Valid, 1139 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-19 07:42:24,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [638 Valid, 1139 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 538 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-19 07:42:24,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3286 states. [2023-11-19 07:42:25,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3286 to 2687. [2023-11-19 07:42:25,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2687 states, 2246 states have (on average 1.6340160284951024) internal successors, (3670), 2268 states have internal predecessors, (3670), 397 states have call successors, (397), 43 states have call predecessors, (397), 43 states have return successors, (397), 375 states have call predecessors, (397), 397 states have call successors, (397) [2023-11-19 07:42:25,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2687 states to 2687 states and 4464 transitions. [2023-11-19 07:42:25,082 INFO L78 Accepts]: Start accepts. Automaton has 2687 states and 4464 transitions. Word has length 384 [2023-11-19 07:42:25,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:42:25,083 INFO L495 AbstractCegarLoop]: Abstraction has 2687 states and 4464 transitions. [2023-11-19 07:42:25,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 2 states have call successors, (59), 2 states have call predecessors, (59), 2 states have return successors, (59), 2 states have call predecessors, (59), 2 states have call successors, (59) [2023-11-19 07:42:25,085 INFO L276 IsEmpty]: Start isEmpty. Operand 2687 states and 4464 transitions. [2023-11-19 07:42:25,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 385 [2023-11-19 07:42:25,090 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:42:25,091 INFO L195 NwaCegarLoop]: trace histogram [59, 59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:42:25,117 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cf887d9-3707-4187-b189-4a0d96d45dec/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-19 07:42:25,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cf887d9-3707-4187-b189-4a0d96d45dec/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:42:25,307 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:42:25,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:42:25,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1724131833, now seen corresponding path program 1 times [2023-11-19 07:42:25,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:42:25,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934335532] [2023-11-19 07:42:25,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:25,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:42:25,366 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:42:25,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [29518029] [2023-11-19 07:42:25,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:42:25,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:42:25,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cf887d9-3707-4187-b189-4a0d96d45dec/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:42:25,368 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cf887d9-3707-4187-b189-4a0d96d45dec/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:42:25,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cf887d9-3707-4187-b189-4a0d96d45dec/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-19 07:42:25,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:42:25,747 INFO L262 TraceCheckSpWp]: Trace formula consists of 918 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-19 07:42:25,758 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:42:27,527 INFO L134 CoverageAnalysis]: Checked inductivity of 6844 backedges. 4267 proven. 153 refuted. 0 times theorem prover too weak. 2424 trivial. 0 not checked. [2023-11-19 07:42:27,527 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:42:29,789 INFO L134 CoverageAnalysis]: Checked inductivity of 6844 backedges. 111 proven. 63 refuted. 0 times theorem prover too weak. 6670 trivial. 0 not checked. [2023-11-19 07:42:29,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:42:29,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934335532] [2023-11-19 07:42:29,790 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:42:29,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29518029] [2023-11-19 07:42:29,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29518029] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:42:29,790 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:42:29,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 17 [2023-11-19 07:42:29,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145371972] [2023-11-19 07:42:29,792 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:42:29,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-19 07:42:29,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:42:29,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-19 07:42:29,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2023-11-19 07:42:29,797 INFO L87 Difference]: Start difference. First operand 2687 states and 4464 transitions. Second operand has 17 states, 17 states have (on average 10.705882352941176) internal successors, (182), 17 states have internal predecessors, (182), 5 states have call successors, (118), 4 states have call predecessors, (118), 7 states have return successors, (118), 5 states have call predecessors, (118), 5 states have call successors, (118) [2023-11-19 07:42:36,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:42:36,312 INFO L93 Difference]: Finished difference Result 15439 states and 24990 transitions. [2023-11-19 07:42:36,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-11-19 07:42:36,313 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 10.705882352941176) internal successors, (182), 17 states have internal predecessors, (182), 5 states have call successors, (118), 4 states have call predecessors, (118), 7 states have return successors, (118), 5 states have call predecessors, (118), 5 states have call successors, (118) Word has length 384 [2023-11-19 07:42:36,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:42:36,381 INFO L225 Difference]: With dead ends: 15439 [2023-11-19 07:42:36,381 INFO L226 Difference]: Without dead ends: 13353 [2023-11-19 07:42:36,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 799 GetRequests, 754 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=627, Invalid=1535, Unknown=0, NotChecked=0, Total=2162 [2023-11-19 07:42:36,391 INFO L413 NwaCegarLoop]: 290 mSDtfsCounter, 1624 mSDsluCounter, 2184 mSDsCounter, 0 mSdLazyCounter, 2059 mSolverCounterSat, 594 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1676 SdHoareTripleChecker+Valid, 2474 SdHoareTripleChecker+Invalid, 2653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 594 IncrementalHoareTripleChecker+Valid, 2059 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2023-11-19 07:42:36,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1676 Valid, 2474 Invalid, 2653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [594 Valid, 2059 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2023-11-19 07:42:36,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13353 states.