./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-18.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_07eed3c2-96a7-499f-a4ed-8cfee67861e7/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07eed3c2-96a7-499f-a4ed-8cfee67861e7/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_07eed3c2-96a7-499f-a4ed-8cfee67861e7/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07eed3c2-96a7-499f-a4ed-8cfee67861e7/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-18.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07eed3c2-96a7-499f-a4ed-8cfee67861e7/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_07eed3c2-96a7-499f-a4ed-8cfee67861e7/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 307330b5784102094d6e331f59192507d431682cdaaa70e5c84c83c1216c8289 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:55:26,843 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:55:26,914 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07eed3c2-96a7-499f-a4ed-8cfee67861e7/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:55:26,920 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:55:26,920 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:55:26,945 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:55:26,945 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:55:26,946 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:55:26,947 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:55:26,947 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:55:26,948 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:55:26,948 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:55:26,949 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:55:26,950 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:55:26,950 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:55:26,950 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:55:26,951 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:55:26,951 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:55:26,952 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:55:26,952 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:55:26,953 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:55:26,953 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:55:26,954 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:55:26,954 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:55:26,955 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:55:26,955 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:55:26,956 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:55:26,956 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:55:26,956 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:55:26,957 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:55:26,957 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:55:26,957 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:55:26,958 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:55:26,958 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:55:26,959 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:55:26,959 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:55:26,959 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:55:26,960 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:55:26,960 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:55:26,960 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_07eed3c2-96a7-499f-a4ed-8cfee67861e7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07eed3c2-96a7-499f-a4ed-8cfee67861e7/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 307330b5784102094d6e331f59192507d431682cdaaa70e5c84c83c1216c8289 [2023-11-19 07:55:27,255 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:55:27,284 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:55:27,287 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:55:27,289 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:55:27,289 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:55:27,291 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07eed3c2-96a7-499f-a4ed-8cfee67861e7/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-18.i [2023-11-19 07:55:30,677 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:55:31,056 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:55:31,057 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07eed3c2-96a7-499f-a4ed-8cfee67861e7/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-18.i [2023-11-19 07:55:31,075 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07eed3c2-96a7-499f-a4ed-8cfee67861e7/bin/uautomizer-verify-uCwYo4JHxu/data/0c8320994/9bbbdbccc9c04dc7a9687ac5acddf4c3/FLAGfb53aa43f [2023-11-19 07:55:31,093 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07eed3c2-96a7-499f-a4ed-8cfee67861e7/bin/uautomizer-verify-uCwYo4JHxu/data/0c8320994/9bbbdbccc9c04dc7a9687ac5acddf4c3 [2023-11-19 07:55:31,099 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:55:31,102 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:55:31,105 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:55:31,106 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:55:31,112 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:55:31,115 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:55:31" (1/1) ... [2023-11-19 07:55:31,116 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ce97c4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:31, skipping insertion in model container [2023-11-19 07:55:31,116 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:55:31" (1/1) ... [2023-11-19 07:55:31,189 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:55:31,388 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_07eed3c2-96a7-499f-a4ed-8cfee67861e7/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-18.i[916,929] [2023-11-19 07:55:31,596 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:55:31,627 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:55:31,639 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_07eed3c2-96a7-499f-a4ed-8cfee67861e7/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-18.i[916,929] [2023-11-19 07:55:31,807 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:55:31,831 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:55:31,832 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:31 WrapperNode [2023-11-19 07:55:31,832 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:55:31,833 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:55:31,833 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:55:31,834 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:55:31,841 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:31" (1/1) ... [2023-11-19 07:55:31,875 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:31" (1/1) ... [2023-11-19 07:55:31,957 INFO L138 Inliner]: procedures = 26, calls = 64, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 481 [2023-11-19 07:55:31,957 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:55:31,958 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:55:31,958 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:55:31,958 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:55:31,968 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:31" (1/1) ... [2023-11-19 07:55:31,968 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:31" (1/1) ... [2023-11-19 07:55:31,978 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:31" (1/1) ... [2023-11-19 07:55:31,978 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:31" (1/1) ... [2023-11-19 07:55:32,010 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:31" (1/1) ... [2023-11-19 07:55:32,017 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:31" (1/1) ... [2023-11-19 07:55:32,023 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:31" (1/1) ... [2023-11-19 07:55:32,031 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:31" (1/1) ... [2023-11-19 07:55:32,046 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:55:32,047 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:55:32,048 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:55:32,048 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:55:32,049 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:31" (1/1) ... [2023-11-19 07:55:32,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:55:32,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07eed3c2-96a7-499f-a4ed-8cfee67861e7/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:32,083 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07eed3c2-96a7-499f-a4ed-8cfee67861e7/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:32,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07eed3c2-96a7-499f-a4ed-8cfee67861e7/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:55:32,135 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:55:32,135 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-19 07:55:32,135 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-19 07:55:32,135 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:55:32,136 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:55:32,136 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:55:32,288 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:55:32,291 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:55:33,274 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:55:33,286 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:55:33,286 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 07:55:33,292 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:55:33 BoogieIcfgContainer [2023-11-19 07:55:33,293 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:55:33,295 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:55:33,295 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:55:33,299 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:55:33,299 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:55:31" (1/3) ... [2023-11-19 07:55:33,300 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cb8673e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:55:33, skipping insertion in model container [2023-11-19 07:55:33,300 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:31" (2/3) ... [2023-11-19 07:55:33,300 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cb8673e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:55:33, skipping insertion in model container [2023-11-19 07:55:33,301 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:55:33" (3/3) ... [2023-11-19 07:55:33,302 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount250_file-18.i [2023-11-19 07:55:33,336 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:55:33,336 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:55:33,413 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:55:33,422 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;@136db73, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:55:33,423 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 07:55:33,431 INFO L276 IsEmpty]: Start isEmpty. Operand has 195 states, 141 states have (on average 1.5673758865248226) internal successors, (221), 142 states have internal predecessors, (221), 51 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 51 states have call predecessors, (51), 51 states have call successors, (51) [2023-11-19 07:55:33,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2023-11-19 07:55:33,460 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:55:33,461 INFO L195 NwaCegarLoop]: trace histogram [51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:55:33,461 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:55:33,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:33,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1749962985, now seen corresponding path program 1 times [2023-11-19 07:55:33,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:33,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818791029] [2023-11-19 07:55:33,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:33,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:33,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:33,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:33,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818791029] [2023-11-19 07:55:33,972 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-19 07:55:33,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822519588] [2023-11-19 07:55:33,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:33,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:33,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07eed3c2-96a7-499f-a4ed-8cfee67861e7/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:33,977 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07eed3c2-96a7-499f-a4ed-8cfee67861e7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:55:33,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07eed3c2-96a7-499f-a4ed-8cfee67861e7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:55:34,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:34,361 INFO L262 TraceCheckSpWp]: Trace formula consists of 860 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-19 07:55:34,391 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:55:34,514 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 5000 trivial. 0 not checked. [2023-11-19 07:55:34,515 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:55:34,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822519588] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:55:34,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:55:34,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:55:34,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838263972] [2023-11-19 07:55:34,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:55:34,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 07:55:34,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:34,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 07:55:34,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:55:34,558 INFO L87 Difference]: Start difference. First operand has 195 states, 141 states have (on average 1.5673758865248226) internal successors, (221), 142 states have internal predecessors, (221), 51 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 51 states have call predecessors, (51), 51 states have call successors, (51) Second operand has 2 states, 2 states have (on average 46.0) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (51), 2 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 2 states have call successors, (51) [2023-11-19 07:55:34,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:55:34,612 INFO L93 Difference]: Finished difference Result 383 states and 691 transitions. [2023-11-19 07:55:34,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 07:55:34,614 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 46.0) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (51), 2 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 2 states have call successors, (51) Word has length 342 [2023-11-19 07:55:34,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:55:34,625 INFO L225 Difference]: With dead ends: 383 [2023-11-19 07:55:34,626 INFO L226 Difference]: Without dead ends: 191 [2023-11-19 07:55:34,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:55:34,636 INFO L413 NwaCegarLoop]: 314 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:55:34,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:55:34,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2023-11-19 07:55:34,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2023-11-19 07:55:34,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 138 states have (on average 1.536231884057971) internal successors, (212), 138 states have internal predecessors, (212), 51 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 51 states have call predecessors, (51), 51 states have call successors, (51) [2023-11-19 07:55:34,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 314 transitions. [2023-11-19 07:55:34,716 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 314 transitions. Word has length 342 [2023-11-19 07:55:34,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:55:34,717 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 314 transitions. [2023-11-19 07:55:34,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 46.0) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (51), 2 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 2 states have call successors, (51) [2023-11-19 07:55:34,718 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 314 transitions. [2023-11-19 07:55:34,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2023-11-19 07:55:34,729 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:55:34,730 INFO L195 NwaCegarLoop]: trace histogram [51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:55:34,758 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07eed3c2-96a7-499f-a4ed-8cfee67861e7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:34,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07eed3c2-96a7-499f-a4ed-8cfee67861e7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:34,953 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:55:34,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:34,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1017826449, now seen corresponding path program 1 times [2023-11-19 07:55:34,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:34,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136725765] [2023-11-19 07:55:34,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:34,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:35,087 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:55:35,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1751290996] [2023-11-19 07:55:35,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:35,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:35,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07eed3c2-96a7-499f-a4ed-8cfee67861e7/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:35,090 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07eed3c2-96a7-499f-a4ed-8cfee67861e7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:55:35,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07eed3c2-96a7-499f-a4ed-8cfee67861e7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:55:35,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:35,467 INFO L262 TraceCheckSpWp]: Trace formula consists of 860 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 07:55:35,493 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:55:35,912 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 2600 proven. 0 refuted. 0 times theorem prover too weak. 2500 trivial. 0 not checked. [2023-11-19 07:55:35,912 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:55:35,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:35,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136725765] [2023-11-19 07:55:35,913 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:55:35,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751290996] [2023-11-19 07:55:35,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751290996] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:55:35,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:55:35,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:55:35,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740473455] [2023-11-19 07:55:35,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:55:35,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:55:35,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:35,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:55:35,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:55:35,922 INFO L87 Difference]: Start difference. First operand 191 states and 314 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 2 states have call successors, (51), 2 states have call predecessors, (51), 2 states have return successors, (51), 2 states have call predecessors, (51), 2 states have call successors, (51) [2023-11-19 07:55:36,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:55:36,003 INFO L93 Difference]: Finished difference Result 379 states and 625 transitions. [2023-11-19 07:55:36,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:55:36,004 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 2 states have call successors, (51), 2 states have call predecessors, (51), 2 states have return successors, (51), 2 states have call predecessors, (51), 2 states have call successors, (51) Word has length 342 [2023-11-19 07:55:36,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:55:36,011 INFO L225 Difference]: With dead ends: 379 [2023-11-19 07:55:36,011 INFO L226 Difference]: Without dead ends: 191 [2023-11-19 07:55:36,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 340 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 07:55:36,016 INFO L413 NwaCegarLoop]: 302 mSDtfsCounter, 204 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:55:36,016 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 302 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:55:36,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2023-11-19 07:55:36,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2023-11-19 07:55:36,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 138 states have (on average 1.5289855072463767) internal successors, (211), 138 states have internal predecessors, (211), 51 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 51 states have call predecessors, (51), 51 states have call successors, (51) [2023-11-19 07:55:36,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 313 transitions. [2023-11-19 07:55:36,048 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 313 transitions. Word has length 342 [2023-11-19 07:55:36,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:55:36,051 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 313 transitions. [2023-11-19 07:55:36,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 2 states have call successors, (51), 2 states have call predecessors, (51), 2 states have return successors, (51), 2 states have call predecessors, (51), 2 states have call successors, (51) [2023-11-19 07:55:36,052 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 313 transitions. [2023-11-19 07:55:36,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2023-11-19 07:55:36,056 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:55:36,057 INFO L195 NwaCegarLoop]: trace histogram [51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:55:36,085 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07eed3c2-96a7-499f-a4ed-8cfee67861e7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:36,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07eed3c2-96a7-499f-a4ed-8cfee67861e7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-19 07:55:36,283 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:55:36,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:36,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1239567043, now seen corresponding path program 1 times [2023-11-19 07:55:36,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:36,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828536433] [2023-11-19 07:55:36,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:36,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:36,412 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:55:36,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1943722656] [2023-11-19 07:55:36,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:36,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:36,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07eed3c2-96a7-499f-a4ed-8cfee67861e7/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:36,417 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07eed3c2-96a7-499f-a4ed-8cfee67861e7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:55:36,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07eed3c2-96a7-499f-a4ed-8cfee67861e7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:55:36,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:36,736 INFO L262 TraceCheckSpWp]: Trace formula consists of 859 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 07:55:36,747 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:55:36,840 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5100 trivial. 0 not checked. [2023-11-19 07:55:36,847 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:55:36,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:36,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828536433] [2023-11-19 07:55:36,848 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:55:36,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943722656] [2023-11-19 07:55:36,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943722656] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:55:36,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:55:36,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:55:36,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144035237] [2023-11-19 07:55:36,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:55:36,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:55:36,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:36,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:55:36,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:55:36,859 INFO L87 Difference]: Start difference. First operand 191 states and 313 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) [2023-11-19 07:55:37,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:55:37,008 INFO L93 Difference]: Finished difference Result 562 states and 924 transitions. [2023-11-19 07:55:37,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:55:37,009 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) Word has length 343 [2023-11-19 07:55:37,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:55:37,016 INFO L225 Difference]: With dead ends: 562 [2023-11-19 07:55:37,016 INFO L226 Difference]: Without dead ends: 374 [2023-11-19 07:55:37,018 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 341 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 07:55:37,019 INFO L413 NwaCegarLoop]: 368 mSDtfsCounter, 273 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 648 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:55:37,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [273 Valid, 648 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:55:37,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2023-11-19 07:55:37,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 370. [2023-11-19 07:55:37,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 265 states have (on average 1.509433962264151) internal successors, (400), 265 states have internal predecessors, (400), 102 states have call successors, (102), 2 states have call predecessors, (102), 2 states have return successors, (102), 102 states have call predecessors, (102), 102 states have call successors, (102) [2023-11-19 07:55:37,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 604 transitions. [2023-11-19 07:55:37,092 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 604 transitions. Word has length 343 [2023-11-19 07:55:37,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:55:37,098 INFO L495 AbstractCegarLoop]: Abstraction has 370 states and 604 transitions. [2023-11-19 07:55:37,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) [2023-11-19 07:55:37,099 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 604 transitions. [2023-11-19 07:55:37,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2023-11-19 07:55:37,102 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:55:37,103 INFO L195 NwaCegarLoop]: trace histogram [51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:55:37,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07eed3c2-96a7-499f-a4ed-8cfee67861e7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:37,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07eed3c2-96a7-499f-a4ed-8cfee67861e7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-19 07:55:37,304 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:55:37,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:37,305 INFO L85 PathProgramCache]: Analyzing trace with hash 131117633, now seen corresponding path program 1 times [2023-11-19 07:55:37,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:37,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474774602] [2023-11-19 07:55:37,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:37,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:37,403 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:55:37,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1508485281] [2023-11-19 07:55:37,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:37,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:37,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07eed3c2-96a7-499f-a4ed-8cfee67861e7/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:37,407 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07eed3c2-96a7-499f-a4ed-8cfee67861e7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:55:37,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07eed3c2-96a7-499f-a4ed-8cfee67861e7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:55:37,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:37,693 INFO L262 TraceCheckSpWp]: Trace formula consists of 859 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-19 07:55:37,704 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:55:39,057 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 2094 proven. 108 refuted. 0 times theorem prover too weak. 2898 trivial. 0 not checked. [2023-11-19 07:55:39,057 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:55:39,809 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 42 proven. 108 refuted. 0 times theorem prover too weak. 4950 trivial. 0 not checked. [2023-11-19 07:55:39,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:39,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474774602] [2023-11-19 07:55:39,810 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:55:39,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508485281] [2023-11-19 07:55:39,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508485281] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:55:39,810 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:55:39,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2023-11-19 07:55:39,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43891674] [2023-11-19 07:55:39,811 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:55:39,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-19 07:55:39,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:39,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-19 07:55:39,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2023-11-19 07:55:39,814 INFO L87 Difference]: Start difference. First operand 370 states and 604 transitions. Second operand has 14 states, 14 states have (on average 10.642857142857142) internal successors, (149), 14 states have internal predecessors, (149), 4 states have call successors, (102), 3 states have call predecessors, (102), 5 states have return successors, (102), 4 states have call predecessors, (102), 4 states have call successors, (102) [2023-11-19 07:55:44,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:55:44,282 INFO L93 Difference]: Finished difference Result 3750 states and 5979 transitions. [2023-11-19 07:55:44,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-11-19 07:55:44,283 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 10.642857142857142) internal successors, (149), 14 states have internal predecessors, (149), 4 states have call successors, (102), 3 states have call predecessors, (102), 5 states have return successors, (102), 4 states have call predecessors, (102), 4 states have call successors, (102) Word has length 343 [2023-11-19 07:55:44,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:55:44,316 INFO L225 Difference]: With dead ends: 3750 [2023-11-19 07:55:44,317 INFO L226 Difference]: Without dead ends: 3383 [2023-11-19 07:55:44,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 739 GetRequests, 681 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 988 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=865, Invalid=2441, Unknown=0, NotChecked=0, Total=3306 [2023-11-19 07:55:44,332 INFO L413 NwaCegarLoop]: 534 mSDtfsCounter, 3629 mSDsluCounter, 2711 mSDsCounter, 0 mSdLazyCounter, 1450 mSolverCounterSat, 1147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3645 SdHoareTripleChecker+Valid, 3245 SdHoareTripleChecker+Invalid, 2597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1147 IncrementalHoareTripleChecker+Valid, 1450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-11-19 07:55:44,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3645 Valid, 3245 Invalid, 2597 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1147 Valid, 1450 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-11-19 07:55:44,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3383 states. [2023-11-19 07:55:44,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3383 to 1343. [2023-11-19 07:55:44,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1343 states, 996 states have (on average 1.4688755020080322) internal successors, (1463), 1002 states have internal predecessors, (1463), 327 states have call successors, (327), 19 states have call predecessors, (327), 19 states have return successors, (327), 321 states have call predecessors, (327), 327 states have call successors, (327) [2023-11-19 07:55:44,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1343 states to 1343 states and 2117 transitions. [2023-11-19 07:55:44,699 INFO L78 Accepts]: Start accepts. Automaton has 1343 states and 2117 transitions. Word has length 343 [2023-11-19 07:55:44,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:55:44,700 INFO L495 AbstractCegarLoop]: Abstraction has 1343 states and 2117 transitions. [2023-11-19 07:55:44,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 10.642857142857142) internal successors, (149), 14 states have internal predecessors, (149), 4 states have call successors, (102), 3 states have call predecessors, (102), 5 states have return successors, (102), 4 states have call predecessors, (102), 4 states have call successors, (102) [2023-11-19 07:55:44,701 INFO L276 IsEmpty]: Start isEmpty. Operand 1343 states and 2117 transitions. [2023-11-19 07:55:44,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2023-11-19 07:55:44,707 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:55:44,707 INFO L195 NwaCegarLoop]: trace histogram [51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:55:44,736 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07eed3c2-96a7-499f-a4ed-8cfee67861e7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:44,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07eed3c2-96a7-499f-a4ed-8cfee67861e7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:44,927 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:55:44,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:44,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1978569537, now seen corresponding path program 1 times [2023-11-19 07:55:44,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:44,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731983443] [2023-11-19 07:55:44,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:44,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:45,001 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:55:45,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1466968421] [2023-11-19 07:55:45,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:45,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:45,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07eed3c2-96a7-499f-a4ed-8cfee67861e7/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:45,004 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07eed3c2-96a7-499f-a4ed-8cfee67861e7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:55:45,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07eed3c2-96a7-499f-a4ed-8cfee67861e7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:55:45,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:45,298 INFO L262 TraceCheckSpWp]: Trace formula consists of 859 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-19 07:55:45,318 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:55:46,386 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 2094 proven. 108 refuted. 0 times theorem prover too weak. 2898 trivial. 0 not checked. [2023-11-19 07:55:46,386 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:55:46,773 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 42 proven. 108 refuted. 0 times theorem prover too weak. 4950 trivial. 0 not checked. [2023-11-19 07:55:46,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:46,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731983443] [2023-11-19 07:55:46,774 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:55:46,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466968421] [2023-11-19 07:55:46,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466968421] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:55:46,774 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:55:46,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2023-11-19 07:55:46,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526240402] [2023-11-19 07:55:46,775 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:55:46,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 07:55:46,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:46,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 07:55:46,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2023-11-19 07:55:46,779 INFO L87 Difference]: Start difference. First operand 1343 states and 2117 transitions. Second operand has 12 states, 12 states have (on average 14.166666666666666) internal successors, (170), 12 states have internal predecessors, (170), 4 states have call successors, (102), 3 states have call predecessors, (102), 5 states have return successors, (102), 4 states have call predecessors, (102), 4 states have call successors, (102) [2023-11-19 07:55:47,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:55:47,790 INFO L93 Difference]: Finished difference Result 2666 states and 4175 transitions. [2023-11-19 07:55:47,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-19 07:55:47,791 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 14.166666666666666) internal successors, (170), 12 states have internal predecessors, (170), 4 states have call successors, (102), 3 states have call predecessors, (102), 5 states have return successors, (102), 4 states have call predecessors, (102), 4 states have call successors, (102) Word has length 343 [2023-11-19 07:55:47,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:55:47,809 INFO L225 Difference]: With dead ends: 2666 [2023-11-19 07:55:47,809 INFO L226 Difference]: Without dead ends: 1349 [2023-11-19 07:55:47,813 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 694 GetRequests, 672 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=137, Invalid=283, Unknown=0, NotChecked=0, Total=420 [2023-11-19 07:55:47,815 INFO L413 NwaCegarLoop]: 263 mSDtfsCounter, 955 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 299 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 955 SdHoareTripleChecker+Valid, 736 SdHoareTripleChecker+Invalid, 796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 299 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-19 07:55:47,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [955 Valid, 736 Invalid, 796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [299 Valid, 497 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-19 07:55:47,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1349 states. [2023-11-19 07:55:47,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1349 to 817. [2023-11-19 07:55:47,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 817 states, 640 states have (on average 1.4765625) internal successors, (945), 642 states have internal predecessors, (945), 167 states have call successors, (167), 9 states have call predecessors, (167), 9 states have return successors, (167), 165 states have call predecessors, (167), 167 states have call successors, (167) [2023-11-19 07:55:47,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 817 states to 817 states and 1279 transitions. [2023-11-19 07:55:47,958 INFO L78 Accepts]: Start accepts. Automaton has 817 states and 1279 transitions. Word has length 343 [2023-11-19 07:55:47,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:55:47,959 INFO L495 AbstractCegarLoop]: Abstraction has 817 states and 1279 transitions. [2023-11-19 07:55:47,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 14.166666666666666) internal successors, (170), 12 states have internal predecessors, (170), 4 states have call successors, (102), 3 states have call predecessors, (102), 5 states have return successors, (102), 4 states have call predecessors, (102), 4 states have call successors, (102) [2023-11-19 07:55:47,960 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states and 1279 transitions. [2023-11-19 07:55:47,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2023-11-19 07:55:47,964 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:55:47,964 INFO L195 NwaCegarLoop]: trace histogram [51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:55:47,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07eed3c2-96a7-499f-a4ed-8cfee67861e7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:48,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07eed3c2-96a7-499f-a4ed-8cfee67861e7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:48,188 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:55:48,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:48,189 INFO L85 PathProgramCache]: Analyzing trace with hash 957501183, now seen corresponding path program 1 times [2023-11-19 07:55:48,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:48,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648990251] [2023-11-19 07:55:48,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:48,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:48,273 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:55:48,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [358473142] [2023-11-19 07:55:48,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:48,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:48,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07eed3c2-96a7-499f-a4ed-8cfee67861e7/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:48,275 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07eed3c2-96a7-499f-a4ed-8cfee67861e7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:55:48,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07eed3c2-96a7-499f-a4ed-8cfee67861e7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 07:55:48,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:48,610 INFO L262 TraceCheckSpWp]: Trace formula consists of 860 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-19 07:55:48,619 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:55:49,220 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 3390 proven. 39 refuted. 0 times theorem prover too weak. 1671 trivial. 0 not checked. [2023-11-19 07:55:49,220 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:55:49,608 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 111 proven. 39 refuted. 0 times theorem prover too weak. 4950 trivial. 0 not checked. [2023-11-19 07:55:49,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:49,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648990251] [2023-11-19 07:55:49,609 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:55:49,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358473142] [2023-11-19 07:55:49,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358473142] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:55:49,610 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:55:49,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2023-11-19 07:55:49,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222689288] [2023-11-19 07:55:49,611 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:55:49,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-19 07:55:49,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:49,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-19 07:55:49,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-11-19 07:55:49,614 INFO L87 Difference]: Start difference. First operand 817 states and 1279 transitions. Second operand has 14 states, 14 states have (on average 9.5) internal successors, (133), 14 states have internal predecessors, (133), 5 states have call successors, (80), 3 states have call predecessors, (80), 5 states have return successors, (80), 5 states have call predecessors, (80), 5 states have call successors, (80) [2023-11-19 07:55:51,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:55:51,152 INFO L93 Difference]: Finished difference Result 2558 states and 3985 transitions. [2023-11-19 07:55:51,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-19 07:55:51,153 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 9.5) internal successors, (133), 14 states have internal predecessors, (133), 5 states have call successors, (80), 3 states have call predecessors, (80), 5 states have return successors, (80), 5 states have call predecessors, (80), 5 states have call successors, (80) Word has length 343 [2023-11-19 07:55:51,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:55:51,165 INFO L225 Difference]: With dead ends: 2558 [2023-11-19 07:55:51,165 INFO L226 Difference]: Without dead ends: 1767 [2023-11-19 07:55:51,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 695 GetRequests, 673 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=164, Invalid=388, Unknown=0, NotChecked=0, Total=552 [2023-11-19 07:55:51,169 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 1401 mSDsluCounter, 1015 mSDsCounter, 0 mSdLazyCounter, 858 mSolverCounterSat, 402 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1438 SdHoareTripleChecker+Valid, 1233 SdHoareTripleChecker+Invalid, 1260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 402 IncrementalHoareTripleChecker+Valid, 858 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:55:51,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1438 Valid, 1233 Invalid, 1260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [402 Valid, 858 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-19 07:55:51,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1767 states. [2023-11-19 07:55:51,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1767 to 1323. [2023-11-19 07:55:51,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1323 states, 1078 states have (on average 1.4851576994434137) internal successors, (1601), 1082 states have internal predecessors, (1601), 227 states have call successors, (227), 17 states have call predecessors, (227), 17 states have return successors, (227), 223 states have call predecessors, (227), 227 states have call successors, (227) [2023-11-19 07:55:51,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1323 states to 1323 states and 2055 transitions. [2023-11-19 07:55:51,346 INFO L78 Accepts]: Start accepts. Automaton has 1323 states and 2055 transitions. Word has length 343 [2023-11-19 07:55:51,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:55:51,347 INFO L495 AbstractCegarLoop]: Abstraction has 1323 states and 2055 transitions. [2023-11-19 07:55:51,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.5) internal successors, (133), 14 states have internal predecessors, (133), 5 states have call successors, (80), 3 states have call predecessors, (80), 5 states have return successors, (80), 5 states have call predecessors, (80), 5 states have call successors, (80) [2023-11-19 07:55:51,347 INFO L276 IsEmpty]: Start isEmpty. Operand 1323 states and 2055 transitions. [2023-11-19 07:55:51,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2023-11-19 07:55:51,351 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:55:51,352 INFO L195 NwaCegarLoop]: trace histogram [51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:55:51,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07eed3c2-96a7-499f-a4ed-8cfee67861e7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:51,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07eed3c2-96a7-499f-a4ed-8cfee67861e7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:51,571 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:55:51,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:51,571 INFO L85 PathProgramCache]: Analyzing trace with hash 60107905, now seen corresponding path program 1 times [2023-11-19 07:55:51,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:51,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316727316] [2023-11-19 07:55:51,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:51,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:51,706 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:55:51,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [41809629] [2023-11-19 07:55:51,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:51,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:51,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07eed3c2-96a7-499f-a4ed-8cfee67861e7/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:51,726 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07eed3c2-96a7-499f-a4ed-8cfee67861e7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:55:51,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07eed3c2-96a7-499f-a4ed-8cfee67861e7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 07:55:52,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:52,063 INFO L262 TraceCheckSpWp]: Trace formula consists of 858 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:55:52,071 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:55:52,568 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 1268 proven. 129 refuted. 0 times theorem prover too weak. 3703 trivial. 0 not checked. [2023-11-19 07:55:52,569 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:55:53,035 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 21 proven. 129 refuted. 0 times theorem prover too weak. 4950 trivial. 0 not checked. [2023-11-19 07:55:53,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:53,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316727316] [2023-11-19 07:55:53,036 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:55:53,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41809629] [2023-11-19 07:55:53,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41809629] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:55:53,036 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:55:53,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-19 07:55:53,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030052415] [2023-11-19 07:55:53,037 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:55:53,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 07:55:53,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:53,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 07:55:53,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:55:53,041 INFO L87 Difference]: Start difference. First operand 1323 states and 2055 transitions. Second operand has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 2 states have call successors, (94), 2 states have call predecessors, (94), 4 states have return successors, (95), 2 states have call predecessors, (95), 2 states have call successors, (95) [2023-11-19 07:55:53,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:55:53,651 INFO L93 Difference]: Finished difference Result 2670 states and 4114 transitions. [2023-11-19 07:55:53,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 07:55:53,652 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 2 states have call successors, (94), 2 states have call predecessors, (94), 4 states have return successors, (95), 2 states have call predecessors, (95), 2 states have call successors, (95) Word has length 343 [2023-11-19 07:55:53,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:55:53,664 INFO L225 Difference]: With dead ends: 2670 [2023-11-19 07:55:53,664 INFO L226 Difference]: Without dead ends: 1373 [2023-11-19 07:55:53,668 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 688 GetRequests, 678 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-19 07:55:53,670 INFO L413 NwaCegarLoop]: 241 mSDtfsCounter, 158 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 618 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 07:55:53,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 618 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 07:55:53,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1373 states. [2023-11-19 07:55:53,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1373 to 1347. [2023-11-19 07:55:53,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1347 states, 1096 states have (on average 1.4644160583941606) internal successors, (1605), 1100 states have internal predecessors, (1605), 227 states have call successors, (227), 23 states have call predecessors, (227), 23 states have return successors, (227), 223 states have call predecessors, (227), 227 states have call successors, (227) [2023-11-19 07:55:53,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1347 states to 1347 states and 2059 transitions. [2023-11-19 07:55:53,896 INFO L78 Accepts]: Start accepts. Automaton has 1347 states and 2059 transitions. Word has length 343 [2023-11-19 07:55:53,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:55:53,897 INFO L495 AbstractCegarLoop]: Abstraction has 1347 states and 2059 transitions. [2023-11-19 07:55:53,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 2 states have call successors, (94), 2 states have call predecessors, (94), 4 states have return successors, (95), 2 states have call predecessors, (95), 2 states have call successors, (95) [2023-11-19 07:55:53,898 INFO L276 IsEmpty]: Start isEmpty. Operand 1347 states and 2059 transitions. [2023-11-19 07:55:53,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2023-11-19 07:55:53,901 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:55:53,902 INFO L195 NwaCegarLoop]: trace histogram [51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:55:53,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07eed3c2-96a7-499f-a4ed-8cfee67861e7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:54,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07eed3c2-96a7-499f-a4ed-8cfee67861e7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:54,115 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:55:54,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:54,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1628029516, now seen corresponding path program 1 times [2023-11-19 07:55:54,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:54,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701946190] [2023-11-19 07:55:54,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:54,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:54,186 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:55:54,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [589926922] [2023-11-19 07:55:54,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:54,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:54,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07eed3c2-96a7-499f-a4ed-8cfee67861e7/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:54,194 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07eed3c2-96a7-499f-a4ed-8cfee67861e7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:55:54,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07eed3c2-96a7-499f-a4ed-8cfee67861e7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 07:55:54,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:54,571 INFO L262 TraceCheckSpWp]: Trace formula consists of 860 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-19 07:55:54,580 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:55:55,740 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 2180 proven. 105 refuted. 0 times theorem prover too weak. 2815 trivial. 0 not checked. [2023-11-19 07:55:55,741 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:55:56,189 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5100 trivial. 0 not checked. [2023-11-19 07:55:56,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:56,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701946190] [2023-11-19 07:55:56,190 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:55:56,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589926922] [2023-11-19 07:55:56,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589926922] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 07:55:56,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:55:56,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 13 [2023-11-19 07:55:56,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603754751] [2023-11-19 07:55:56,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:55:56,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 07:55:56,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:56,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:55:56,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2023-11-19 07:55:56,195 INFO L87 Difference]: Start difference. First operand 1347 states and 2059 transitions. Second operand has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) [2023-11-19 07:55:57,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:55:57,662 INFO L93 Difference]: Finished difference Result 5955 states and 9116 transitions. [2023-11-19 07:55:57,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 07:55:57,663 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) Word has length 344 [2023-11-19 07:55:57,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:55:57,692 INFO L225 Difference]: With dead ends: 5955 [2023-11-19 07:55:57,692 INFO L226 Difference]: Without dead ends: 4344 [2023-11-19 07:55:57,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 690 GetRequests, 677 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2023-11-19 07:55:57,698 INFO L413 NwaCegarLoop]: 414 mSDtfsCounter, 1198 mSDsluCounter, 990 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1198 SdHoareTripleChecker+Valid, 1404 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-19 07:55:57,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1198 Valid, 1404 Invalid, 459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-19 07:55:57,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4344 states. [2023-11-19 07:55:57,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4344 to 1780. [2023-11-19 07:55:57,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1780 states, 1511 states have (on average 1.4923891462607544) internal successors, (2255), 1516 states have internal predecessors, (2255), 241 states have call successors, (241), 27 states have call predecessors, (241), 27 states have return successors, (241), 236 states have call predecessors, (241), 241 states have call successors, (241) [2023-11-19 07:55:57,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1780 states to 1780 states and 2737 transitions. [2023-11-19 07:55:57,985 INFO L78 Accepts]: Start accepts. Automaton has 1780 states and 2737 transitions. Word has length 344 [2023-11-19 07:55:57,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:55:57,986 INFO L495 AbstractCegarLoop]: Abstraction has 1780 states and 2737 transitions. [2023-11-19 07:55:57,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) [2023-11-19 07:55:57,987 INFO L276 IsEmpty]: Start isEmpty. Operand 1780 states and 2737 transitions. [2023-11-19 07:55:57,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2023-11-19 07:55:57,991 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:55:57,992 INFO L195 NwaCegarLoop]: trace histogram [51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:55:58,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07eed3c2-96a7-499f-a4ed-8cfee67861e7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:58,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07eed3c2-96a7-499f-a4ed-8cfee67861e7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:58,215 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:55:58,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:58,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1992307280, now seen corresponding path program 1 times [2023-11-19 07:55:58,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:58,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856750990] [2023-11-19 07:55:58,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:58,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:58,268 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:55:58,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [765195394] [2023-11-19 07:55:58,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:58,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:58,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07eed3c2-96a7-499f-a4ed-8cfee67861e7/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:58,270 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07eed3c2-96a7-499f-a4ed-8cfee67861e7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:55:58,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07eed3c2-96a7-499f-a4ed-8cfee67861e7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 07:55:58,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:58,584 INFO L262 TraceCheckSpWp]: Trace formula consists of 862 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:55:58,596 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:56:01,937 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5100 trivial. 0 not checked. [2023-11-19 07:56:01,937 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:56:01,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:56:01,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856750990] [2023-11-19 07:56:01,938 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:56:01,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765195394] [2023-11-19 07:56:01,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765195394] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:56:01,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:56:01,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:56:01,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986933441] [2023-11-19 07:56:01,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:56:01,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:56:01,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:56:01,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:56:01,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:56:01,942 INFO L87 Difference]: Start difference. First operand 1780 states and 2737 transitions. Second operand has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) [2023-11-19 07:56:02,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:56:02,718 INFO L93 Difference]: Finished difference Result 5072 states and 7795 transitions. [2023-11-19 07:56:02,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:56:02,719 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) Word has length 344 [2023-11-19 07:56:02,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:56:02,744 INFO L225 Difference]: With dead ends: 5072 [2023-11-19 07:56:02,744 INFO L226 Difference]: Without dead ends: 3295 [2023-11-19 07:56:02,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 340 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:56:02,751 INFO L413 NwaCegarLoop]: 341 mSDtfsCounter, 306 mSDsluCounter, 800 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 1141 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 07:56:02,752 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [306 Valid, 1141 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 07:56:02,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3295 states. [2023-11-19 07:56:03,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3295 to 2422. [2023-11-19 07:56:03,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2422 states, 1983 states have (on average 1.448310640443772) internal successors, (2872), 1995 states have internal predecessors, (2872), 387 states have call successors, (387), 51 states have call predecessors, (387), 51 states have return successors, (387), 375 states have call predecessors, (387), 387 states have call successors, (387) [2023-11-19 07:56:03,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2422 states to 2422 states and 3646 transitions. [2023-11-19 07:56:03,202 INFO L78 Accepts]: Start accepts. Automaton has 2422 states and 3646 transitions. Word has length 344 [2023-11-19 07:56:03,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:56:03,203 INFO L495 AbstractCegarLoop]: Abstraction has 2422 states and 3646 transitions. [2023-11-19 07:56:03,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) [2023-11-19 07:56:03,204 INFO L276 IsEmpty]: Start isEmpty. Operand 2422 states and 3646 transitions. [2023-11-19 07:56:03,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2023-11-19 07:56:03,208 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:56:03,209 INFO L195 NwaCegarLoop]: trace histogram [51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:56:03,233 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07eed3c2-96a7-499f-a4ed-8cfee67861e7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-19 07:56:03,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07eed3c2-96a7-499f-a4ed-8cfee67861e7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-19 07:56:03,431 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:56:03,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:56:03,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1849289330, now seen corresponding path program 1 times [2023-11-19 07:56:03,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:56:03,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871756772] [2023-11-19 07:56:03,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:03,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:56:03,484 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:56:03,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1685711653] [2023-11-19 07:56:03,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:03,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:56:03,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07eed3c2-96a7-499f-a4ed-8cfee67861e7/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:56:03,486 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07eed3c2-96a7-499f-a4ed-8cfee67861e7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:56:03,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07eed3c2-96a7-499f-a4ed-8cfee67861e7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-19 07:56:03,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:03,835 INFO L262 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-19 07:56:03,842 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:56:04,253 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 2042 proven. 336 refuted. 0 times theorem prover too weak. 2722 trivial. 0 not checked. [2023-11-19 07:56:04,253 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:56:04,606 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 42 proven. 108 refuted. 0 times theorem prover too weak. 4950 trivial. 0 not checked. [2023-11-19 07:56:04,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:56:04,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871756772] [2023-11-19 07:56:04,607 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:56:04,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685711653] [2023-11-19 07:56:04,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685711653] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:56:04,607 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:56:04,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 12 [2023-11-19 07:56:04,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895946655] [2023-11-19 07:56:04,608 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:56:04,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 07:56:04,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:56:04,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 07:56:04,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-11-19 07:56:04,610 INFO L87 Difference]: Start difference. First operand 2422 states and 3646 transitions. Second operand has 12 states, 12 states have (on average 10.916666666666666) internal successors, (131), 12 states have internal predecessors, (131), 3 states have call successors, (87), 3 states have call predecessors, (87), 5 states have return successors, (89), 3 states have call predecessors, (89), 3 states have call successors, (89) [2023-11-19 07:56:06,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:56:06,767 INFO L93 Difference]: Finished difference Result 6333 states and 9304 transitions. [2023-11-19 07:56:06,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-19 07:56:06,768 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 10.916666666666666) internal successors, (131), 12 states have internal predecessors, (131), 3 states have call successors, (87), 3 states have call predecessors, (87), 5 states have return successors, (89), 3 states have call predecessors, (89), 3 states have call successors, (89) Word has length 344 [2023-11-19 07:56:06,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:56:06,795 INFO L225 Difference]: With dead ends: 6333 [2023-11-19 07:56:06,795 INFO L226 Difference]: Without dead ends: 3918 [2023-11-19 07:56:06,802 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 714 GetRequests, 678 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=344, Invalid=916, Unknown=0, NotChecked=0, Total=1260 [2023-11-19 07:56:06,803 INFO L413 NwaCegarLoop]: 350 mSDtfsCounter, 762 mSDsluCounter, 1014 mSDsCounter, 0 mSdLazyCounter, 698 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 792 SdHoareTripleChecker+Valid, 1364 SdHoareTripleChecker+Invalid, 899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:56:06,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [792 Valid, 1364 Invalid, 899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 698 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-19 07:56:06,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3918 states. [2023-11-19 07:56:07,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3918 to 2075. [2023-11-19 07:56:07,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2075 states, 1606 states have (on average 1.4009962640099627) internal successors, (2250), 1616 states have internal predecessors, (2250), 408 states have call successors, (408), 60 states have call predecessors, (408), 60 states have return successors, (408), 398 states have call predecessors, (408), 408 states have call successors, (408) [2023-11-19 07:56:07,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2075 states to 2075 states and 3066 transitions. [2023-11-19 07:56:07,255 INFO L78 Accepts]: Start accepts. Automaton has 2075 states and 3066 transitions. Word has length 344 [2023-11-19 07:56:07,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:56:07,256 INFO L495 AbstractCegarLoop]: Abstraction has 2075 states and 3066 transitions. [2023-11-19 07:56:07,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.916666666666666) internal successors, (131), 12 states have internal predecessors, (131), 3 states have call successors, (87), 3 states have call predecessors, (87), 5 states have return successors, (89), 3 states have call predecessors, (89), 3 states have call successors, (89) [2023-11-19 07:56:07,257 INFO L276 IsEmpty]: Start isEmpty. Operand 2075 states and 3066 transitions. [2023-11-19 07:56:07,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2023-11-19 07:56:07,261 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:56:07,261 INFO L195 NwaCegarLoop]: trace histogram [51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:56:07,291 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07eed3c2-96a7-499f-a4ed-8cfee67861e7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-19 07:56:07,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07eed3c2-96a7-499f-a4ed-8cfee67861e7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-19 07:56:07,483 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:56:07,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:56:07,484 INFO L85 PathProgramCache]: Analyzing trace with hash -700483218, now seen corresponding path program 1 times [2023-11-19 07:56:07,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:56:07,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921996573] [2023-11-19 07:56:07,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:07,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:56:07,533 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:56:07,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1831862598] [2023-11-19 07:56:07,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:07,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:56:07,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07eed3c2-96a7-499f-a4ed-8cfee67861e7/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:56:07,535 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07eed3c2-96a7-499f-a4ed-8cfee67861e7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:56:07,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07eed3c2-96a7-499f-a4ed-8cfee67861e7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-19 07:56:07,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:07,849 INFO L262 TraceCheckSpWp]: Trace formula consists of 860 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-19 07:56:07,856 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:56:08,387 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 1194 proven. 18 refuted. 0 times theorem prover too weak. 3888 trivial. 0 not checked. [2023-11-19 07:56:08,388 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:56:08,696 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 132 proven. 18 refuted. 0 times theorem prover too weak. 4950 trivial. 0 not checked. [2023-11-19 07:56:08,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:56:08,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921996573] [2023-11-19 07:56:08,697 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:56:08,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831862598] [2023-11-19 07:56:08,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831862598] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:56:08,697 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:56:08,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-11-19 07:56:08,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269704999] [2023-11-19 07:56:08,698 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:56:08,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-19 07:56:08,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:56:08,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-19 07:56:08,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-11-19 07:56:08,701 INFO L87 Difference]: Start difference. First operand 2075 states and 3066 transitions. Second operand has 13 states, 13 states have (on average 11.384615384615385) internal successors, (148), 13 states have internal predecessors, (148), 4 states have call successors, (102), 3 states have call predecessors, (102), 5 states have return successors, (102), 4 states have call predecessors, (102), 4 states have call successors, (102) [2023-11-19 07:56:12,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:56:12,792 INFO L93 Difference]: Finished difference Result 8445 states and 12421 transitions. [2023-11-19 07:56:12,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-19 07:56:12,793 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 11.384615384615385) internal successors, (148), 13 states have internal predecessors, (148), 4 states have call successors, (102), 3 states have call predecessors, (102), 5 states have return successors, (102), 4 states have call predecessors, (102), 4 states have call successors, (102) Word has length 344 [2023-11-19 07:56:12,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:56:12,833 INFO L225 Difference]: With dead ends: 8445 [2023-11-19 07:56:12,834 INFO L226 Difference]: Without dead ends: 6373 [2023-11-19 07:56:12,839 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 718 GetRequests, 679 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=460, Invalid=1180, Unknown=0, NotChecked=0, Total=1640 [2023-11-19 07:56:12,840 INFO L413 NwaCegarLoop]: 510 mSDtfsCounter, 2544 mSDsluCounter, 3001 mSDsCounter, 0 mSdLazyCounter, 1444 mSolverCounterSat, 1260 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2546 SdHoareTripleChecker+Valid, 3511 SdHoareTripleChecker+Invalid, 2704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1260 IncrementalHoareTripleChecker+Valid, 1444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-11-19 07:56:12,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2546 Valid, 3511 Invalid, 2704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1260 Valid, 1444 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-11-19 07:56:12,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6373 states. [2023-11-19 07:56:13,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6373 to 4092. [2023-11-19 07:56:13,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4092 states, 3227 states have (on average 1.4164859002169197) internal successors, (4571), 3248 states have internal predecessors, (4571), 748 states have call successors, (748), 116 states have call predecessors, (748), 116 states have return successors, (748), 727 states have call predecessors, (748), 748 states have call successors, (748) [2023-11-19 07:56:13,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4092 states to 4092 states and 6067 transitions. [2023-11-19 07:56:13,696 INFO L78 Accepts]: Start accepts. Automaton has 4092 states and 6067 transitions. Word has length 344 [2023-11-19 07:56:13,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:56:13,697 INFO L495 AbstractCegarLoop]: Abstraction has 4092 states and 6067 transitions. [2023-11-19 07:56:13,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 11.384615384615385) internal successors, (148), 13 states have internal predecessors, (148), 4 states have call successors, (102), 3 states have call predecessors, (102), 5 states have return successors, (102), 4 states have call predecessors, (102), 4 states have call successors, (102) [2023-11-19 07:56:13,698 INFO L276 IsEmpty]: Start isEmpty. Operand 4092 states and 6067 transitions. [2023-11-19 07:56:13,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2023-11-19 07:56:13,703 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:56:13,703 INFO L195 NwaCegarLoop]: trace histogram [51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:56:13,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07eed3c2-96a7-499f-a4ed-8cfee67861e7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-19 07:56:13,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07eed3c2-96a7-499f-a4ed-8cfee67861e7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-19 07:56:13,927 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:56:13,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:56:13,927 INFO L85 PathProgramCache]: Analyzing trace with hash 247167931, now seen corresponding path program 1 times [2023-11-19 07:56:13,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:56:13,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935912273] [2023-11-19 07:56:13,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:13,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:56:13,974 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:56:13,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [355330744] [2023-11-19 07:56:13,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:56:13,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:56:13,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07eed3c2-96a7-499f-a4ed-8cfee67861e7/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:56:13,976 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07eed3c2-96a7-499f-a4ed-8cfee67861e7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:56:13,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07eed3c2-96a7-499f-a4ed-8cfee67861e7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-19 07:56:14,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:56:14,302 INFO L262 TraceCheckSpWp]: Trace formula consists of 862 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 07:56:14,310 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:56:14,777 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 438 proven. 144 refuted. 0 times theorem prover too weak. 4518 trivial. 0 not checked. [2023-11-19 07:56:14,777 INFO L327 TraceCheckSpWp]: Computing backward predicates...