./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-96.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_1ef5c553-d058-4b5f-9297-0f861382f03a/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef5c553-d058-4b5f-9297-0f861382f03a/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_1ef5c553-d058-4b5f-9297-0f861382f03a/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef5c553-d058-4b5f-9297-0f861382f03a/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-96.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef5c553-d058-4b5f-9297-0f861382f03a/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_1ef5c553-d058-4b5f-9297-0f861382f03a/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 bbe82d9db46cc4877e8712955f17e418608577d83df9685a386a7b3e39c5f9b9 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:39:50,437 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:39:50,575 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef5c553-d058-4b5f-9297-0f861382f03a/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:39:50,583 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:39:50,584 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:39:50,624 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:39:50,625 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:39:50,626 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:39:50,627 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:39:50,633 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:39:50,635 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:39:50,636 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:39:50,636 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:39:50,638 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:39:50,639 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:39:50,639 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:39:50,640 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:39:50,640 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:39:50,641 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:39:50,641 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:39:50,642 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:39:50,643 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:39:50,644 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:39:50,644 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:39:50,645 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:39:50,646 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:39:50,647 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:39:50,647 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:39:50,648 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:39:50,648 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:39:50,650 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:39:50,650 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:39:50,650 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:39:50,651 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:39:50,651 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:39:50,651 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:39:50,652 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:39:50,652 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:39:50,652 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:39:50,652 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_1ef5c553-d058-4b5f-9297-0f861382f03a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef5c553-d058-4b5f-9297-0f861382f03a/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bbe82d9db46cc4877e8712955f17e418608577d83df9685a386a7b3e39c5f9b9 [2023-11-19 07:39:51,004 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:39:51,041 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:39:51,045 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:39:51,047 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:39:51,048 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:39:51,049 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef5c553-d058-4b5f-9297-0f861382f03a/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-96.i [2023-11-19 07:39:54,448 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:39:54,864 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:39:54,865 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef5c553-d058-4b5f-9297-0f861382f03a/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-96.i [2023-11-19 07:39:54,888 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef5c553-d058-4b5f-9297-0f861382f03a/bin/uautomizer-verify-uCwYo4JHxu/data/b38d82d33/790e143e07124173a20e7df3ac5089ee/FLAGc9698b3f5 [2023-11-19 07:39:54,908 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef5c553-d058-4b5f-9297-0f861382f03a/bin/uautomizer-verify-uCwYo4JHxu/data/b38d82d33/790e143e07124173a20e7df3ac5089ee [2023-11-19 07:39:54,915 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:39:54,918 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:39:54,921 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:39:54,922 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:39:54,928 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:39:54,929 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:39:54" (1/1) ... [2023-11-19 07:39:54,930 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f70fc2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:54, skipping insertion in model container [2023-11-19 07:39:54,930 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:39:54" (1/1) ... [2023-11-19 07:39:55,017 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:39:55,201 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_1ef5c553-d058-4b5f-9297-0f861382f03a/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-96.i[916,929] [2023-11-19 07:39:55,588 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:39:55,620 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:39:55,636 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_1ef5c553-d058-4b5f-9297-0f861382f03a/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-96.i[916,929] [2023-11-19 07:39:55,963 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:39:56,001 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:39:56,002 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:56 WrapperNode [2023-11-19 07:39:56,002 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:39:56,004 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:39:56,004 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:39:56,005 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:39:56,013 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:56" (1/1) ... [2023-11-19 07:39:56,051 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:56" (1/1) ... [2023-11-19 07:39:56,219 INFO L138 Inliner]: procedures = 26, calls = 78, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 730 [2023-11-19 07:39:56,220 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:39:56,221 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:39:56,221 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:39:56,221 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:39:56,231 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:56" (1/1) ... [2023-11-19 07:39:56,232 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:56" (1/1) ... [2023-11-19 07:39:56,251 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:56" (1/1) ... [2023-11-19 07:39:56,251 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:56" (1/1) ... [2023-11-19 07:39:56,322 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:56" (1/1) ... [2023-11-19 07:39:56,344 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:56" (1/1) ... [2023-11-19 07:39:56,373 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:56" (1/1) ... [2023-11-19 07:39:56,380 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:56" (1/1) ... [2023-11-19 07:39:56,410 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:39:56,411 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:39:56,411 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:39:56,411 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:39:56,412 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:56" (1/1) ... [2023-11-19 07:39:56,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:39:56,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef5c553-d058-4b5f-9297-0f861382f03a/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:39:56,449 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef5c553-d058-4b5f-9297-0f861382f03a/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:39:56,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef5c553-d058-4b5f-9297-0f861382f03a/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:39:56,511 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:39:56,512 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-19 07:39:56,512 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-19 07:39:56,512 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:39:56,512 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:39:56,513 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:39:56,711 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:39:56,714 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:39:58,257 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:39:58,274 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:39:58,274 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 07:39:58,280 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:39:58 BoogieIcfgContainer [2023-11-19 07:39:58,280 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:39:58,283 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:39:58,284 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:39:58,287 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:39:58,288 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:39:54" (1/3) ... [2023-11-19 07:39:58,289 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@545eb100 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:39:58, skipping insertion in model container [2023-11-19 07:39:58,289 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:39:56" (2/3) ... [2023-11-19 07:39:58,289 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@545eb100 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:39:58, skipping insertion in model container [2023-11-19 07:39:58,290 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:39:58" (3/3) ... [2023-11-19 07:39:58,291 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount500_file-96.i [2023-11-19 07:39:58,317 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:39:58,317 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:39:58,391 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:39:58,400 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;@4e9fab2c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:39:58,401 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 07:39:58,409 INFO L276 IsEmpty]: Start isEmpty. Operand has 280 states, 212 states have (on average 1.5849056603773586) internal successors, (336), 213 states have internal predecessors, (336), 65 states have call successors, (65), 1 states have call predecessors, (65), 1 states have return successors, (65), 65 states have call predecessors, (65), 65 states have call successors, (65) [2023-11-19 07:39:58,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 456 [2023-11-19 07:39:58,450 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:39:58,451 INFO L195 NwaCegarLoop]: trace histogram [65, 65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:39:58,452 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:39:58,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:39:58,459 INFO L85 PathProgramCache]: Analyzing trace with hash 2074341153, now seen corresponding path program 1 times [2023-11-19 07:39:58,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:39:58,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126806392] [2023-11-19 07:39:58,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:39:58,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:39:58,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:39:59,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:39:59,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126806392] [2023-11-19 07:39:59,065 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-19 07:39:59,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441069185] [2023-11-19 07:39:59,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:39:59,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:39:59,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef5c553-d058-4b5f-9297-0f861382f03a/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:39:59,077 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef5c553-d058-4b5f-9297-0f861382f03a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:39:59,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef5c553-d058-4b5f-9297-0f861382f03a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:39:59,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:39:59,563 INFO L262 TraceCheckSpWp]: Trace formula consists of 1194 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-19 07:39:59,596 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:39:59,715 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 128 proven. 0 refuted. 0 times theorem prover too weak. 8192 trivial. 0 not checked. [2023-11-19 07:39:59,716 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:39:59,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441069185] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:39:59,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:39:59,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:39:59,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024897231] [2023-11-19 07:39:59,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:39:59,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 07:39:59,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:39:59,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 07:39:59,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:39:59,798 INFO L87 Difference]: Start difference. First operand has 280 states, 212 states have (on average 1.5849056603773586) internal successors, (336), 213 states have internal predecessors, (336), 65 states have call successors, (65), 1 states have call predecessors, (65), 1 states have return successors, (65), 65 states have call predecessors, (65), 65 states have call successors, (65) Second operand has 2 states, 2 states have (on average 67.5) internal successors, (135), 2 states have internal predecessors, (135), 2 states have call successors, (65), 2 states have call predecessors, (65), 1 states have return successors, (65), 1 states have call predecessors, (65), 2 states have call successors, (65) [2023-11-19 07:39:59,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:39:59,872 INFO L93 Difference]: Finished difference Result 550 states and 985 transitions. [2023-11-19 07:39:59,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 07:39:59,874 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 67.5) internal successors, (135), 2 states have internal predecessors, (135), 2 states have call successors, (65), 2 states have call predecessors, (65), 1 states have return successors, (65), 1 states have call predecessors, (65), 2 states have call successors, (65) Word has length 455 [2023-11-19 07:39:59,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:39:59,887 INFO L225 Difference]: With dead ends: 550 [2023-11-19 07:39:59,887 INFO L226 Difference]: Without dead ends: 273 [2023-11-19 07:39:59,894 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 454 GetRequests, 454 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 07:39:59,898 INFO L413 NwaCegarLoop]: 449 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, 449 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 07:39:59,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:39:59,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2023-11-19 07:39:59,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 273. [2023-11-19 07:39:59,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 206 states have (on average 1.5485436893203883) internal successors, (319), 206 states have internal predecessors, (319), 65 states have call successors, (65), 1 states have call predecessors, (65), 1 states have return successors, (65), 65 states have call predecessors, (65), 65 states have call successors, (65) [2023-11-19 07:39:59,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 449 transitions. [2023-11-19 07:39:59,995 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 449 transitions. Word has length 455 [2023-11-19 07:39:59,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:39:59,996 INFO L495 AbstractCegarLoop]: Abstraction has 273 states and 449 transitions. [2023-11-19 07:39:59,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 67.5) internal successors, (135), 2 states have internal predecessors, (135), 2 states have call successors, (65), 2 states have call predecessors, (65), 1 states have return successors, (65), 1 states have call predecessors, (65), 2 states have call successors, (65) [2023-11-19 07:39:59,997 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 449 transitions. [2023-11-19 07:40:00,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 456 [2023-11-19 07:40:00,011 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:40:00,011 INFO L195 NwaCegarLoop]: trace histogram [65, 65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:40:00,041 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef5c553-d058-4b5f-9297-0f861382f03a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:40:00,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef5c553-d058-4b5f-9297-0f861382f03a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-19 07:40:00,226 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:40:00,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:00,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1842844299, now seen corresponding path program 1 times [2023-11-19 07:40:00,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:00,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543003828] [2023-11-19 07:40:00,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:00,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:00,437 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:40:00,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1297571333] [2023-11-19 07:40:00,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:00,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:00,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef5c553-d058-4b5f-9297-0f861382f03a/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:40:00,447 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef5c553-d058-4b5f-9297-0f861382f03a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:40:00,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef5c553-d058-4b5f-9297-0f861382f03a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:40:00,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:00,908 INFO L262 TraceCheckSpWp]: Trace formula consists of 1194 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 07:40:00,920 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:40:01,051 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8320 trivial. 0 not checked. [2023-11-19 07:40:01,051 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:40:01,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:01,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543003828] [2023-11-19 07:40:01,052 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:40:01,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297571333] [2023-11-19 07:40:01,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297571333] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:40:01,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:40:01,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:40:01,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114724348] [2023-11-19 07:40:01,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:40:01,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:40:01,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:01,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:40:01,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:40:01,059 INFO L87 Difference]: Start difference. First operand 273 states and 449 transitions. Second operand has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 1 states have call successors, (65), 1 states have call predecessors, (65), 1 states have return successors, (65), 1 states have call predecessors, (65), 1 states have call successors, (65) [2023-11-19 07:40:01,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:40:01,197 INFO L93 Difference]: Finished difference Result 725 states and 1193 transitions. [2023-11-19 07:40:01,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:40:01,198 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 1 states have call successors, (65), 1 states have call predecessors, (65), 1 states have return successors, (65), 1 states have call predecessors, (65), 1 states have call successors, (65) Word has length 455 [2023-11-19 07:40:01,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:40:01,208 INFO L225 Difference]: With dead ends: 725 [2023-11-19 07:40:01,208 INFO L226 Difference]: Without dead ends: 455 [2023-11-19 07:40:01,211 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 454 GetRequests, 453 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 07:40:01,213 INFO L413 NwaCegarLoop]: 661 mSDtfsCounter, 271 mSDsluCounter, 425 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 1086 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:40:01,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [271 Valid, 1086 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:40:01,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2023-11-19 07:40:01,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 452. [2023-11-19 07:40:01,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 364 states have (on average 1.5769230769230769) internal successors, (574), 365 states have internal predecessors, (574), 85 states have call successors, (85), 2 states have call predecessors, (85), 2 states have return successors, (85), 84 states have call predecessors, (85), 85 states have call successors, (85) [2023-11-19 07:40:01,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 744 transitions. [2023-11-19 07:40:01,287 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 744 transitions. Word has length 455 [2023-11-19 07:40:01,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:40:01,289 INFO L495 AbstractCegarLoop]: Abstraction has 452 states and 744 transitions. [2023-11-19 07:40:01,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 1 states have call successors, (65), 1 states have call predecessors, (65), 1 states have return successors, (65), 1 states have call predecessors, (65), 1 states have call successors, (65) [2023-11-19 07:40:01,290 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 744 transitions. [2023-11-19 07:40:01,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 456 [2023-11-19 07:40:01,296 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:40:01,297 INFO L195 NwaCegarLoop]: trace histogram [65, 65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:40:01,329 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef5c553-d058-4b5f-9297-0f861382f03a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:40:01,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef5c553-d058-4b5f-9297-0f861382f03a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:01,523 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:40:01,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:01,524 INFO L85 PathProgramCache]: Analyzing trace with hash -234492599, now seen corresponding path program 1 times [2023-11-19 07:40:01,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:01,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339978456] [2023-11-19 07:40:01,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:01,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:01,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:01,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:01,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339978456] [2023-11-19 07:40:01,753 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-19 07:40:01,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287688292] [2023-11-19 07:40:01,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:01,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:01,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef5c553-d058-4b5f-9297-0f861382f03a/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:40:01,755 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef5c553-d058-4b5f-9297-0f861382f03a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:40:01,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef5c553-d058-4b5f-9297-0f861382f03a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:40:02,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:02,245 INFO L262 TraceCheckSpWp]: Trace formula consists of 1195 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 07:40:02,258 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:40:02,334 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8320 trivial. 0 not checked. [2023-11-19 07:40:02,334 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:40:02,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287688292] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:40:02,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:40:02,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:40:02,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738456989] [2023-11-19 07:40:02,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:40:02,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:40:02,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:02,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:40:02,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:40:02,340 INFO L87 Difference]: Start difference. First operand 452 states and 744 transitions. Second operand has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 1 states have call successors, (65), 1 states have call predecessors, (65), 1 states have return successors, (65), 1 states have call predecessors, (65), 1 states have call successors, (65) [2023-11-19 07:40:02,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:40:02,460 INFO L93 Difference]: Finished difference Result 1202 states and 1968 transitions. [2023-11-19 07:40:02,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:40:02,462 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 1 states have call successors, (65), 1 states have call predecessors, (65), 1 states have return successors, (65), 1 states have call predecessors, (65), 1 states have call successors, (65) Word has length 455 [2023-11-19 07:40:02,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:40:02,474 INFO L225 Difference]: With dead ends: 1202 [2023-11-19 07:40:02,474 INFO L226 Difference]: Without dead ends: 753 [2023-11-19 07:40:02,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 454 GetRequests, 453 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 07:40:02,478 INFO L413 NwaCegarLoop]: 657 mSDtfsCounter, 258 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 1085 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:40:02,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [258 Valid, 1085 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:40:02,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2023-11-19 07:40:02,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 750. [2023-11-19 07:40:02,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 750 states, 596 states have (on average 1.5520134228187918) internal successors, (925), 599 states have internal predecessors, (925), 149 states have call successors, (149), 4 states have call predecessors, (149), 4 states have return successors, (149), 146 states have call predecessors, (149), 149 states have call successors, (149) [2023-11-19 07:40:02,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 1223 transitions. [2023-11-19 07:40:02,564 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 1223 transitions. Word has length 455 [2023-11-19 07:40:02,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:40:02,566 INFO L495 AbstractCegarLoop]: Abstraction has 750 states and 1223 transitions. [2023-11-19 07:40:02,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 1 states have call successors, (65), 1 states have call predecessors, (65), 1 states have return successors, (65), 1 states have call predecessors, (65), 1 states have call successors, (65) [2023-11-19 07:40:02,567 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 1223 transitions. [2023-11-19 07:40:02,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 456 [2023-11-19 07:40:02,573 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:40:02,573 INFO L195 NwaCegarLoop]: trace histogram [65, 65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:40:02,604 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef5c553-d058-4b5f-9297-0f861382f03a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-19 07:40:02,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef5c553-d058-4b5f-9297-0f861382f03a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:02,800 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:40:02,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:02,801 INFO L85 PathProgramCache]: Analyzing trace with hash 658993739, now seen corresponding path program 1 times [2023-11-19 07:40:02,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:02,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780133925] [2023-11-19 07:40:02,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:02,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:02,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:03,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:03,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780133925] [2023-11-19 07:40:03,002 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-19 07:40:03,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112322335] [2023-11-19 07:40:03,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:03,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:03,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef5c553-d058-4b5f-9297-0f861382f03a/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:40:03,005 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef5c553-d058-4b5f-9297-0f861382f03a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:40:03,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef5c553-d058-4b5f-9297-0f861382f03a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:40:03,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:03,509 INFO L262 TraceCheckSpWp]: Trace formula consists of 1194 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 07:40:03,522 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:40:03,616 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8320 trivial. 0 not checked. [2023-11-19 07:40:03,618 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:40:03,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112322335] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:40:03,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:40:03,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 07:40:03,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312391689] [2023-11-19 07:40:03,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:40:03,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:40:03,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:03,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:40:03,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:40:03,626 INFO L87 Difference]: Start difference. First operand 750 states and 1223 transitions. Second operand has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 1 states have call successors, (65), 1 states have call predecessors, (65), 1 states have return successors, (65), 1 states have call predecessors, (65), 1 states have call successors, (65) [2023-11-19 07:40:03,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:40:03,987 INFO L93 Difference]: Finished difference Result 2050 states and 3330 transitions. [2023-11-19 07:40:03,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:40:03,988 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 1 states have call successors, (65), 1 states have call predecessors, (65), 1 states have return successors, (65), 1 states have call predecessors, (65), 1 states have call successors, (65) Word has length 455 [2023-11-19 07:40:03,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:40:04,005 INFO L225 Difference]: With dead ends: 2050 [2023-11-19 07:40:04,005 INFO L226 Difference]: Without dead ends: 1303 [2023-11-19 07:40:04,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 454 GetRequests, 452 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:40:04,013 INFO L413 NwaCegarLoop]: 702 mSDtfsCounter, 701 mSDsluCounter, 666 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 701 SdHoareTripleChecker+Valid, 1368 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 07:40:04,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [701 Valid, 1368 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 07:40:04,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1303 states. [2023-11-19 07:40:04,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1303 to 806. [2023-11-19 07:40:04,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 806 states, 652 states have (on average 1.5690184049079754) internal successors, (1023), 655 states have internal predecessors, (1023), 149 states have call successors, (149), 4 states have call predecessors, (149), 4 states have return successors, (149), 146 states have call predecessors, (149), 149 states have call successors, (149) [2023-11-19 07:40:04,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 1321 transitions. [2023-11-19 07:40:04,101 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 1321 transitions. Word has length 455 [2023-11-19 07:40:04,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:40:04,102 INFO L495 AbstractCegarLoop]: Abstraction has 806 states and 1321 transitions. [2023-11-19 07:40:04,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 1 states have call successors, (65), 1 states have call predecessors, (65), 1 states have return successors, (65), 1 states have call predecessors, (65), 1 states have call successors, (65) [2023-11-19 07:40:04,103 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 1321 transitions. [2023-11-19 07:40:04,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 456 [2023-11-19 07:40:04,109 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:40:04,109 INFO L195 NwaCegarLoop]: trace histogram [65, 65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:40:04,140 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef5c553-d058-4b5f-9297-0f861382f03a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:40:04,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef5c553-d058-4b5f-9297-0f861382f03a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:04,324 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:40:04,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:04,324 INFO L85 PathProgramCache]: Analyzing trace with hash -907764211, now seen corresponding path program 1 times [2023-11-19 07:40:04,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:04,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576923145] [2023-11-19 07:40:04,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:04,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:04,442 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:40:04,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [965768154] [2023-11-19 07:40:04,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:04,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:04,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef5c553-d058-4b5f-9297-0f861382f03a/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:40:04,445 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef5c553-d058-4b5f-9297-0f861382f03a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:40:04,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef5c553-d058-4b5f-9297-0f861382f03a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:40:04,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:04,988 INFO L262 TraceCheckSpWp]: Trace formula consists of 1193 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 07:40:05,002 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:40:05,694 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8320 trivial. 0 not checked. [2023-11-19 07:40:05,694 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:40:05,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:05,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576923145] [2023-11-19 07:40:05,695 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:40:05,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965768154] [2023-11-19 07:40:05,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965768154] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:40:05,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:40:05,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 07:40:05,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315495980] [2023-11-19 07:40:05,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:40:05,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 07:40:05,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:05,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:40:05,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:40:05,707 INFO L87 Difference]: Start difference. First operand 806 states and 1321 transitions. Second operand has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 1 states have call successors, (65), 1 states have call predecessors, (65), 1 states have return successors, (65), 1 states have call predecessors, (65), 1 states have call successors, (65) [2023-11-19 07:40:06,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:40:06,740 INFO L93 Difference]: Finished difference Result 4747 states and 7829 transitions. [2023-11-19 07:40:06,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 07:40:06,741 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 1 states have call successors, (65), 1 states have call predecessors, (65), 1 states have return successors, (65), 1 states have call predecessors, (65), 1 states have call successors, (65) Word has length 455 [2023-11-19 07:40:06,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:40:06,772 INFO L225 Difference]: With dead ends: 4747 [2023-11-19 07:40:06,772 INFO L226 Difference]: Without dead ends: 3944 [2023-11-19 07:40:06,776 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 460 GetRequests, 452 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-11-19 07:40:06,777 INFO L413 NwaCegarLoop]: 773 mSDtfsCounter, 2042 mSDsluCounter, 2197 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 418 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2042 SdHoareTripleChecker+Valid, 2970 SdHoareTripleChecker+Invalid, 549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 418 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-19 07:40:06,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2042 Valid, 2970 Invalid, 549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [418 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-19 07:40:06,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3944 states. [2023-11-19 07:40:07,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3944 to 1725. [2023-11-19 07:40:07,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1725 states, 1352 states have (on average 1.53698224852071) internal successors, (2078), 1358 states have internal predecessors, (2078), 363 states have call successors, (363), 9 states have call predecessors, (363), 9 states have return successors, (363), 357 states have call predecessors, (363), 363 states have call successors, (363) [2023-11-19 07:40:07,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1725 states to 1725 states and 2804 transitions. [2023-11-19 07:40:07,030 INFO L78 Accepts]: Start accepts. Automaton has 1725 states and 2804 transitions. Word has length 455 [2023-11-19 07:40:07,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:40:07,031 INFO L495 AbstractCegarLoop]: Abstraction has 1725 states and 2804 transitions. [2023-11-19 07:40:07,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 1 states have call successors, (65), 1 states have call predecessors, (65), 1 states have return successors, (65), 1 states have call predecessors, (65), 1 states have call successors, (65) [2023-11-19 07:40:07,032 INFO L276 IsEmpty]: Start isEmpty. Operand 1725 states and 2804 transitions. [2023-11-19 07:40:07,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 457 [2023-11-19 07:40:07,039 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:40:07,040 INFO L195 NwaCegarLoop]: trace histogram [65, 65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:40:07,065 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef5c553-d058-4b5f-9297-0f861382f03a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-19 07:40:07,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef5c553-d058-4b5f-9297-0f861382f03a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:07,263 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:40:07,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:07,264 INFO L85 PathProgramCache]: Analyzing trace with hash 930919457, now seen corresponding path program 1 times [2023-11-19 07:40:07,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:07,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959869206] [2023-11-19 07:40:07,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:07,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:07,395 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:40:07,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [649163033] [2023-11-19 07:40:07,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:07,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:07,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef5c553-d058-4b5f-9297-0f861382f03a/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:40:07,400 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef5c553-d058-4b5f-9297-0f861382f03a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:40:07,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef5c553-d058-4b5f-9297-0f861382f03a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 07:40:08,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:08,009 INFO L262 TraceCheckSpWp]: Trace formula consists of 1191 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:40:08,027 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:40:08,698 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 2892 proven. 150 refuted. 0 times theorem prover too weak. 5278 trivial. 0 not checked. [2023-11-19 07:40:08,699 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:40:09,268 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 42 proven. 150 refuted. 0 times theorem prover too weak. 8128 trivial. 0 not checked. [2023-11-19 07:40:09,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:09,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959869206] [2023-11-19 07:40:09,269 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:40:09,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649163033] [2023-11-19 07:40:09,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649163033] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:40:09,270 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:40:09,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-19 07:40:09,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444219734] [2023-11-19 07:40:09,271 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:40:09,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:40:09,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:09,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:40:09,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:40:09,275 INFO L87 Difference]: Start difference. First operand 1725 states and 2804 transitions. Second operand has 8 states, 8 states have (on average 23.875) internal successors, (191), 8 states have internal predecessors, (191), 3 states have call successors, (115), 2 states have call predecessors, (115), 4 states have return successors, (116), 3 states have call predecessors, (116), 3 states have call successors, (116) [2023-11-19 07:40:10,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:40:10,019 INFO L93 Difference]: Finished difference Result 3388 states and 5472 transitions. [2023-11-19 07:40:10,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 07:40:10,022 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 23.875) internal successors, (191), 8 states have internal predecessors, (191), 3 states have call successors, (115), 2 states have call predecessors, (115), 4 states have return successors, (116), 3 states have call predecessors, (116), 3 states have call successors, (116) Word has length 456 [2023-11-19 07:40:10,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:40:10,039 INFO L225 Difference]: With dead ends: 3388 [2023-11-19 07:40:10,039 INFO L226 Difference]: Without dead ends: 1779 [2023-11-19 07:40:10,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 914 GetRequests, 904 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-11-19 07:40:10,047 INFO L413 NwaCegarLoop]: 371 mSDtfsCounter, 551 mSDsluCounter, 610 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 565 SdHoareTripleChecker+Valid, 981 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 07:40:10,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [565 Valid, 981 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 07:40:10,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1779 states. [2023-11-19 07:40:10,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1779 to 1761. [2023-11-19 07:40:10,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1761 states, 1379 states have (on average 1.5221174764321972) internal successors, (2099), 1385 states have internal predecessors, (2099), 363 states have call successors, (363), 18 states have call predecessors, (363), 18 states have return successors, (363), 357 states have call predecessors, (363), 363 states have call successors, (363) [2023-11-19 07:40:10,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1761 states to 1761 states and 2825 transitions. [2023-11-19 07:40:10,278 INFO L78 Accepts]: Start accepts. Automaton has 1761 states and 2825 transitions. Word has length 456 [2023-11-19 07:40:10,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:40:10,279 INFO L495 AbstractCegarLoop]: Abstraction has 1761 states and 2825 transitions. [2023-11-19 07:40:10,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 23.875) internal successors, (191), 8 states have internal predecessors, (191), 3 states have call successors, (115), 2 states have call predecessors, (115), 4 states have return successors, (116), 3 states have call predecessors, (116), 3 states have call successors, (116) [2023-11-19 07:40:10,280 INFO L276 IsEmpty]: Start isEmpty. Operand 1761 states and 2825 transitions. [2023-11-19 07:40:10,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 457 [2023-11-19 07:40:10,287 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:40:10,288 INFO L195 NwaCegarLoop]: trace histogram [65, 65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:40:10,321 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef5c553-d058-4b5f-9297-0f861382f03a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 07:40:10,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef5c553-d058-4b5f-9297-0f861382f03a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-19 07:40:10,504 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:40:10,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:10,504 INFO L85 PathProgramCache]: Analyzing trace with hash 438293283, now seen corresponding path program 1 times [2023-11-19 07:40:10,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:10,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185860374] [2023-11-19 07:40:10,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:10,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:10,607 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:40:10,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1455743221] [2023-11-19 07:40:10,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:10,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:10,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef5c553-d058-4b5f-9297-0f861382f03a/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:40:10,609 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef5c553-d058-4b5f-9297-0f861382f03a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:40:10,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef5c553-d058-4b5f-9297-0f861382f03a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 07:40:11,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:11,254 INFO L262 TraceCheckSpWp]: Trace formula consists of 1190 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:40:11,275 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:40:11,646 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 3672 proven. 60 refuted. 0 times theorem prover too weak. 4588 trivial. 0 not checked. [2023-11-19 07:40:11,646 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:40:12,095 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 132 proven. 60 refuted. 0 times theorem prover too weak. 8128 trivial. 0 not checked. [2023-11-19 07:40:12,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:12,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185860374] [2023-11-19 07:40:12,096 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:40:12,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455743221] [2023-11-19 07:40:12,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455743221] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:40:12,097 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:40:12,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-19 07:40:12,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981261057] [2023-11-19 07:40:12,098 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:40:12,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 07:40:12,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:12,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 07:40:12,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:40:12,101 INFO L87 Difference]: Start difference. First operand 1761 states and 2825 transitions. Second operand has 7 states, 7 states have (on average 20.428571428571427) internal successors, (143), 7 states have internal predecessors, (143), 2 states have call successors, (85), 2 states have call predecessors, (85), 4 states have return successors, (86), 2 states have call predecessors, (86), 2 states have call successors, (86) [2023-11-19 07:40:12,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:40:12,946 INFO L93 Difference]: Finished difference Result 2948 states and 4745 transitions. [2023-11-19 07:40:12,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 07:40:12,949 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.428571428571427) internal successors, (143), 7 states have internal predecessors, (143), 2 states have call successors, (85), 2 states have call predecessors, (85), 4 states have return successors, (86), 2 states have call predecessors, (86), 2 states have call successors, (86) Word has length 456 [2023-11-19 07:40:12,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:40:12,961 INFO L225 Difference]: With dead ends: 2948 [2023-11-19 07:40:12,962 INFO L226 Difference]: Without dead ends: 1307 [2023-11-19 07:40:12,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 914 GetRequests, 904 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-19 07:40:12,967 INFO L413 NwaCegarLoop]: 444 mSDtfsCounter, 816 mSDsluCounter, 630 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 860 SdHoareTripleChecker+Valid, 1074 SdHoareTripleChecker+Invalid, 681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-19 07:40:12,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [860 Valid, 1074 Invalid, 681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 497 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-19 07:40:12,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1307 states. [2023-11-19 07:40:13,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1307 to 1167. [2023-11-19 07:40:13,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1167 states, 916 states have (on average 1.517467248908297) internal successors, (1390), 918 states have internal predecessors, (1390), 235 states have call successors, (235), 15 states have call predecessors, (235), 15 states have return successors, (235), 233 states have call predecessors, (235), 235 states have call successors, (235) [2023-11-19 07:40:13,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1167 states to 1167 states and 1860 transitions. [2023-11-19 07:40:13,080 INFO L78 Accepts]: Start accepts. Automaton has 1167 states and 1860 transitions. Word has length 456 [2023-11-19 07:40:13,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:40:13,080 INFO L495 AbstractCegarLoop]: Abstraction has 1167 states and 1860 transitions. [2023-11-19 07:40:13,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.428571428571427) internal successors, (143), 7 states have internal predecessors, (143), 2 states have call successors, (85), 2 states have call predecessors, (85), 4 states have return successors, (86), 2 states have call predecessors, (86), 2 states have call successors, (86) [2023-11-19 07:40:13,081 INFO L276 IsEmpty]: Start isEmpty. Operand 1167 states and 1860 transitions. [2023-11-19 07:40:13,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 458 [2023-11-19 07:40:13,086 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:40:13,086 INFO L195 NwaCegarLoop]: trace histogram [65, 65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:40:13,114 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef5c553-d058-4b5f-9297-0f861382f03a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 07:40:13,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef5c553-d058-4b5f-9297-0f861382f03a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:13,308 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:40:13,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:13,309 INFO L85 PathProgramCache]: Analyzing trace with hash -1810563253, now seen corresponding path program 1 times [2023-11-19 07:40:13,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:13,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278970644] [2023-11-19 07:40:13,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:13,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:13,421 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:40:13,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1147133474] [2023-11-19 07:40:13,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:13,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:13,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef5c553-d058-4b5f-9297-0f861382f03a/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:40:13,423 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef5c553-d058-4b5f-9297-0f861382f03a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:40:13,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef5c553-d058-4b5f-9297-0f861382f03a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 07:40:13,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:13,925 INFO L262 TraceCheckSpWp]: Trace formula consists of 1191 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:40:13,935 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:40:14,540 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 1872 proven. 168 refuted. 0 times theorem prover too weak. 6280 trivial. 0 not checked. [2023-11-19 07:40:14,540 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:40:15,046 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 24 proven. 168 refuted. 0 times theorem prover too weak. 8128 trivial. 0 not checked. [2023-11-19 07:40:15,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:15,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278970644] [2023-11-19 07:40:15,047 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:40:15,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147133474] [2023-11-19 07:40:15,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147133474] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:40:15,047 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:40:15,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-19 07:40:15,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616867499] [2023-11-19 07:40:15,048 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:40:15,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:40:15,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:15,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:40:15,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:40:15,052 INFO L87 Difference]: Start difference. First operand 1167 states and 1860 transitions. Second operand has 8 states, 8 states have (on average 29.375) internal successors, (235), 8 states have internal predecessors, (235), 3 states have call successors, (121), 2 states have call predecessors, (121), 4 states have return successors, (122), 3 states have call predecessors, (122), 3 states have call successors, (122) [2023-11-19 07:40:15,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:40:15,602 INFO L93 Difference]: Finished difference Result 2246 states and 3564 transitions. [2023-11-19 07:40:15,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 07:40:15,603 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 29.375) internal successors, (235), 8 states have internal predecessors, (235), 3 states have call successors, (121), 2 states have call predecessors, (121), 4 states have return successors, (122), 3 states have call predecessors, (122), 3 states have call successors, (122) Word has length 457 [2023-11-19 07:40:15,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:40:15,613 INFO L225 Difference]: With dead ends: 2246 [2023-11-19 07:40:15,613 INFO L226 Difference]: Without dead ends: 1203 [2023-11-19 07:40:15,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 916 GetRequests, 906 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-11-19 07:40:15,619 INFO L413 NwaCegarLoop]: 369 mSDtfsCounter, 451 mSDsluCounter, 605 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 974 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 07:40:15,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [459 Valid, 974 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 07:40:15,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1203 states. [2023-11-19 07:40:15,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1203 to 1187. [2023-11-19 07:40:15,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1187 states, 931 states have (on average 1.5048335123523093) internal successors, (1401), 933 states have internal predecessors, (1401), 235 states have call successors, (235), 20 states have call predecessors, (235), 20 states have return successors, (235), 233 states have call predecessors, (235), 235 states have call successors, (235) [2023-11-19 07:40:15,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1187 states to 1187 states and 1871 transitions. [2023-11-19 07:40:15,754 INFO L78 Accepts]: Start accepts. Automaton has 1187 states and 1871 transitions. Word has length 457 [2023-11-19 07:40:15,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:40:15,755 INFO L495 AbstractCegarLoop]: Abstraction has 1187 states and 1871 transitions. [2023-11-19 07:40:15,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 29.375) internal successors, (235), 8 states have internal predecessors, (235), 3 states have call successors, (121), 2 states have call predecessors, (121), 4 states have return successors, (122), 3 states have call predecessors, (122), 3 states have call successors, (122) [2023-11-19 07:40:15,756 INFO L276 IsEmpty]: Start isEmpty. Operand 1187 states and 1871 transitions. [2023-11-19 07:40:15,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2023-11-19 07:40:15,762 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:40:15,762 INFO L195 NwaCegarLoop]: trace histogram [65, 65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:40:15,788 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef5c553-d058-4b5f-9297-0f861382f03a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-19 07:40:15,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef5c553-d058-4b5f-9297-0f861382f03a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:15,972 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:40:15,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:15,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1281837669, now seen corresponding path program 1 times [2023-11-19 07:40:15,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:15,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014684752] [2023-11-19 07:40:15,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:15,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:16,060 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:40:16,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1239471013] [2023-11-19 07:40:16,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:16,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:16,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef5c553-d058-4b5f-9297-0f861382f03a/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:40:16,063 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef5c553-d058-4b5f-9297-0f861382f03a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:40:16,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef5c553-d058-4b5f-9297-0f861382f03a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 07:40:16,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:16,666 INFO L262 TraceCheckSpWp]: Trace formula consists of 1200 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-19 07:40:16,678 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:40:17,917 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 3844 proven. 66 refuted. 0 times theorem prover too weak. 4410 trivial. 0 not checked. [2023-11-19 07:40:17,918 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:40:18,512 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 126 proven. 66 refuted. 0 times theorem prover too weak. 8128 trivial. 0 not checked. [2023-11-19 07:40:18,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:18,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014684752] [2023-11-19 07:40:18,513 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:40:18,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239471013] [2023-11-19 07:40:18,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239471013] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:40:18,514 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:40:18,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2023-11-19 07:40:18,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038780303] [2023-11-19 07:40:18,517 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:40:18,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-19 07:40:18,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:18,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-19 07:40:18,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2023-11-19 07:40:18,526 INFO L87 Difference]: Start difference. First operand 1187 states and 1871 transitions. Second operand has 13 states, 13 states have (on average 15.384615384615385) internal successors, (200), 13 states have internal predecessors, (200), 4 states have call successors, (130), 3 states have call predecessors, (130), 5 states have return successors, (130), 4 states have call predecessors, (130), 4 states have call successors, (130) [2023-11-19 07:40:21,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:40:21,357 INFO L93 Difference]: Finished difference Result 7772 states and 12366 transitions. [2023-11-19 07:40:21,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-19 07:40:21,358 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 15.384615384615385) internal successors, (200), 13 states have internal predecessors, (200), 4 states have call successors, (130), 3 states have call predecessors, (130), 5 states have return successors, (130), 4 states have call predecessors, (130), 4 states have call successors, (130) Word has length 458 [2023-11-19 07:40:21,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:40:21,408 INFO L225 Difference]: With dead ends: 7772 [2023-11-19 07:40:21,409 INFO L226 Difference]: Without dead ends: 6713 [2023-11-19 07:40:21,415 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 937 GetRequests, 907 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=226, Invalid=704, Unknown=0, NotChecked=0, Total=930 [2023-11-19 07:40:21,418 INFO L413 NwaCegarLoop]: 700 mSDtfsCounter, 4095 mSDsluCounter, 3009 mSDsCounter, 0 mSdLazyCounter, 1103 mSolverCounterSat, 858 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4139 SdHoareTripleChecker+Valid, 3709 SdHoareTripleChecker+Invalid, 1961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 858 IncrementalHoareTripleChecker+Valid, 1103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:40:21,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4139 Valid, 3709 Invalid, 1961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [858 Valid, 1103 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-11-19 07:40:21,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6713 states. [2023-11-19 07:40:21,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6713 to 2640. [2023-11-19 07:40:21,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2640 states, 2105 states have (on average 1.4954869358669833) internal successors, (3148), 2115 states have internal predecessors, (3148), 485 states have call successors, (485), 49 states have call predecessors, (485), 49 states have return successors, (485), 475 states have call predecessors, (485), 485 states have call successors, (485) [2023-11-19 07:40:21,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2640 states to 2640 states and 4118 transitions. [2023-11-19 07:40:21,865 INFO L78 Accepts]: Start accepts. Automaton has 2640 states and 4118 transitions. Word has length 458 [2023-11-19 07:40:21,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:40:21,866 INFO L495 AbstractCegarLoop]: Abstraction has 2640 states and 4118 transitions. [2023-11-19 07:40:21,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 15.384615384615385) internal successors, (200), 13 states have internal predecessors, (200), 4 states have call successors, (130), 3 states have call predecessors, (130), 5 states have return successors, (130), 4 states have call predecessors, (130), 4 states have call successors, (130) [2023-11-19 07:40:21,867 INFO L276 IsEmpty]: Start isEmpty. Operand 2640 states and 4118 transitions. [2023-11-19 07:40:21,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2023-11-19 07:40:21,874 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:40:21,875 INFO L195 NwaCegarLoop]: trace histogram [65, 65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:40:21,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef5c553-d058-4b5f-9297-0f861382f03a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-19 07:40:22,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef5c553-d058-4b5f-9297-0f861382f03a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:22,100 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:40:22,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:22,100 INFO L85 PathProgramCache]: Analyzing trace with hash 645003097, now seen corresponding path program 1 times [2023-11-19 07:40:22,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:22,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726466326] [2023-11-19 07:40:22,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:22,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:22,194 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:40:22,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1633635359] [2023-11-19 07:40:22,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:22,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:22,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef5c553-d058-4b5f-9297-0f861382f03a/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:40:22,196 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef5c553-d058-4b5f-9297-0f861382f03a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:40:22,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef5c553-d058-4b5f-9297-0f861382f03a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-19 07:40:22,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:22,748 INFO L262 TraceCheckSpWp]: Trace formula consists of 1196 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 07:40:22,757 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:40:22,872 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8320 trivial. 0 not checked. [2023-11-19 07:40:22,873 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:40:22,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:22,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726466326] [2023-11-19 07:40:22,873 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:40:22,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633635359] [2023-11-19 07:40:22,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633635359] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:40:22,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:40:22,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:40:22,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721192163] [2023-11-19 07:40:22,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:40:22,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:40:22,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:22,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:40:22,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:40:22,877 INFO L87 Difference]: Start difference. First operand 2640 states and 4118 transitions. Second operand has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 1 states have call successors, (65), 1 states have call predecessors, (65), 1 states have return successors, (65), 1 states have call predecessors, (65), 1 states have call successors, (65) [2023-11-19 07:40:23,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:40:23,178 INFO L93 Difference]: Finished difference Result 5162 states and 8062 transitions. [2023-11-19 07:40:23,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:40:23,180 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 1 states have call successors, (65), 1 states have call predecessors, (65), 1 states have return successors, (65), 1 states have call predecessors, (65), 1 states have call successors, (65) Word has length 458 [2023-11-19 07:40:23,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:40:23,201 INFO L225 Difference]: With dead ends: 5162 [2023-11-19 07:40:23,202 INFO L226 Difference]: Without dead ends: 2654 [2023-11-19 07:40:23,209 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 457 GetRequests, 456 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 07:40:23,210 INFO L413 NwaCegarLoop]: 633 mSDtfsCounter, 399 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 1050 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:40:23,211 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [399 Valid, 1050 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:40:23,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2654 states. [2023-11-19 07:40:23,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2654 to 2652. [2023-11-19 07:40:23,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2652 states, 2117 states have (on average 1.483230987246103) internal successors, (3140), 2127 states have internal predecessors, (3140), 485 states have call successors, (485), 49 states have call predecessors, (485), 49 states have return successors, (485), 475 states have call predecessors, (485), 485 states have call successors, (485) [2023-11-19 07:40:23,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2652 states to 2652 states and 4110 transitions. [2023-11-19 07:40:23,559 INFO L78 Accepts]: Start accepts. Automaton has 2652 states and 4110 transitions. Word has length 458 [2023-11-19 07:40:23,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:40:23,561 INFO L495 AbstractCegarLoop]: Abstraction has 2652 states and 4110 transitions. [2023-11-19 07:40:23,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 1 states have call successors, (65), 1 states have call predecessors, (65), 1 states have return successors, (65), 1 states have call predecessors, (65), 1 states have call successors, (65) [2023-11-19 07:40:23,562 INFO L276 IsEmpty]: Start isEmpty. Operand 2652 states and 4110 transitions. [2023-11-19 07:40:23,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 460 [2023-11-19 07:40:23,606 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:40:23,607 INFO L195 NwaCegarLoop]: trace histogram [65, 65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:40:23,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef5c553-d058-4b5f-9297-0f861382f03a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-19 07:40:23,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef5c553-d058-4b5f-9297-0f861382f03a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-19 07:40:23,808 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:40:23,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:23,809 INFO L85 PathProgramCache]: Analyzing trace with hash 946575040, now seen corresponding path program 1 times [2023-11-19 07:40:23,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:23,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107847049] [2023-11-19 07:40:23,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:23,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:23,958 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:40:23,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [515272214] [2023-11-19 07:40:23,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:23,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:23,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef5c553-d058-4b5f-9297-0f861382f03a/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:40:23,960 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef5c553-d058-4b5f-9297-0f861382f03a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:40:23,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef5c553-d058-4b5f-9297-0f861382f03a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-19 07:40:24,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:24,567 INFO L262 TraceCheckSpWp]: Trace formula consists of 1193 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:40:24,581 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:40:25,133 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 1032 proven. 180 refuted. 0 times theorem prover too weak. 7108 trivial. 0 not checked. [2023-11-19 07:40:25,134 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:40:25,550 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 12 proven. 180 refuted. 0 times theorem prover too weak. 8128 trivial. 0 not checked. [2023-11-19 07:40:25,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:25,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107847049] [2023-11-19 07:40:25,551 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:40:25,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515272214] [2023-11-19 07:40:25,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515272214] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:40:25,551 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:40:25,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-19 07:40:25,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096832296] [2023-11-19 07:40:25,552 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:40:25,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:40:25,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:25,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:40:25,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:40:25,556 INFO L87 Difference]: Start difference. First operand 2652 states and 4110 transitions. Second operand has 8 states, 8 states have (on average 24.125) internal successors, (193), 8 states have internal predecessors, (193), 3 states have call successors, (125), 2 states have call predecessors, (125), 4 states have return successors, (126), 3 states have call predecessors, (126), 3 states have call successors, (126) [2023-11-19 07:40:26,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:40:26,365 INFO L93 Difference]: Finished difference Result 5256 states and 8098 transitions. [2023-11-19 07:40:26,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 07:40:26,366 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 24.125) internal successors, (193), 8 states have internal predecessors, (193), 3 states have call successors, (125), 2 states have call predecessors, (125), 4 states have return successors, (126), 3 states have call predecessors, (126), 3 states have call successors, (126) Word has length 459 [2023-11-19 07:40:26,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:40:26,400 INFO L225 Difference]: With dead ends: 5256 [2023-11-19 07:40:26,400 INFO L226 Difference]: Without dead ends: 2736 [2023-11-19 07:40:26,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 920 GetRequests, 910 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-11-19 07:40:26,407 INFO L413 NwaCegarLoop]: 335 mSDtfsCounter, 531 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 535 SdHoareTripleChecker+Valid, 872 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 07:40:26,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [535 Valid, 872 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 07:40:26,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2736 states. [2023-11-19 07:40:26,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2736 to 2704. [2023-11-19 07:40:26,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2704 states, 2156 states have (on average 1.4633580705009277) internal successors, (3155), 2166 states have internal predecessors, (3155), 485 states have call successors, (485), 62 states have call predecessors, (485), 62 states have return successors, (485), 475 states have call predecessors, (485), 485 states have call successors, (485) [2023-11-19 07:40:26,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2704 states to 2704 states and 4125 transitions. [2023-11-19 07:40:26,736 INFO L78 Accepts]: Start accepts. Automaton has 2704 states and 4125 transitions. Word has length 459 [2023-11-19 07:40:26,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:40:26,738 INFO L495 AbstractCegarLoop]: Abstraction has 2704 states and 4125 transitions. [2023-11-19 07:40:26,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 24.125) internal successors, (193), 8 states have internal predecessors, (193), 3 states have call successors, (125), 2 states have call predecessors, (125), 4 states have return successors, (126), 3 states have call predecessors, (126), 3 states have call successors, (126) [2023-11-19 07:40:26,738 INFO L276 IsEmpty]: Start isEmpty. Operand 2704 states and 4125 transitions. [2023-11-19 07:40:26,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2023-11-19 07:40:26,745 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:40:26,745 INFO L195 NwaCegarLoop]: trace histogram [65, 65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:40:26,773 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef5c553-d058-4b5f-9297-0f861382f03a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-19 07:40:26,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef5c553-d058-4b5f-9297-0f861382f03a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:26,972 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:40:26,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:26,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1583412004, now seen corresponding path program 1 times [2023-11-19 07:40:26,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:26,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224837316] [2023-11-19 07:40:26,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:26,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:27,094 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:40:27,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1659112658] [2023-11-19 07:40:27,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:27,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:27,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef5c553-d058-4b5f-9297-0f861382f03a/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:40:27,100 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef5c553-d058-4b5f-9297-0f861382f03a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:40:27,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef5c553-d058-4b5f-9297-0f861382f03a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-19 07:40:27,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:27,774 INFO L262 TraceCheckSpWp]: Trace formula consists of 1194 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-19 07:40:27,783 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:40:29,919 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 5903 proven. 399 refuted. 0 times theorem prover too weak. 2018 trivial. 0 not checked. [2023-11-19 07:40:29,920 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:40:31,433 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 333 proven. 417 refuted. 0 times theorem prover too weak. 7570 trivial. 0 not checked. [2023-11-19 07:40:31,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:31,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224837316] [2023-11-19 07:40:31,434 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:40:31,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659112658] [2023-11-19 07:40:31,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659112658] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:40:31,434 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:40:31,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2023-11-19 07:40:31,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751533211] [2023-11-19 07:40:31,435 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:40:31,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-19 07:40:31,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:31,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-19 07:40:31,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2023-11-19 07:40:31,440 INFO L87 Difference]: Start difference. First operand 2704 states and 4125 transitions. Second operand has 30 states, 29 states have (on average 9.620689655172415) internal successors, (279), 28 states have internal predecessors, (279), 9 states have call successors, (122), 5 states have call predecessors, (122), 12 states have return successors, (123), 9 states have call predecessors, (123), 9 states have call successors, (123) [2023-11-19 07:40:35,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:40:35,317 INFO L93 Difference]: Finished difference Result 8334 states and 12408 transitions. [2023-11-19 07:40:35,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-11-19 07:40:35,318 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 9.620689655172415) internal successors, (279), 28 states have internal predecessors, (279), 9 states have call successors, (122), 5 states have call predecessors, (122), 12 states have return successors, (123), 9 states have call predecessors, (123), 9 states have call successors, (123) Word has length 460 [2023-11-19 07:40:35,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:40:35,344 INFO L225 Difference]: With dead ends: 8334 [2023-11-19 07:40:35,345 INFO L226 Difference]: Without dead ends: 5766 [2023-11-19 07:40:35,352 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 957 GetRequests, 894 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1112 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1060, Invalid=3100, Unknown=0, NotChecked=0, Total=4160 [2023-11-19 07:40:35,353 INFO L413 NwaCegarLoop]: 309 mSDtfsCounter, 3520 mSDsluCounter, 2294 mSDsCounter, 0 mSdLazyCounter, 2152 mSolverCounterSat, 590 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3526 SdHoareTripleChecker+Valid, 2603 SdHoareTripleChecker+Invalid, 2742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 590 IncrementalHoareTripleChecker+Valid, 2152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-11-19 07:40:35,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3526 Valid, 2603 Invalid, 2742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [590 Valid, 2152 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-11-19 07:40:35,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5766 states. [2023-11-19 07:40:35,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5766 to 3966. [2023-11-19 07:40:35,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3966 states, 3375 states have (on average 1.4939259259259259) internal successors, (5042), 3385 states have internal predecessors, (5042), 485 states have call successors, (485), 105 states have call predecessors, (485), 105 states have return successors, (485), 475 states have call predecessors, (485), 485 states have call successors, (485) [2023-11-19 07:40:35,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3966 states to 3966 states and 6012 transitions. [2023-11-19 07:40:35,807 INFO L78 Accepts]: Start accepts. Automaton has 3966 states and 6012 transitions. Word has length 460 [2023-11-19 07:40:35,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:40:35,808 INFO L495 AbstractCegarLoop]: Abstraction has 3966 states and 6012 transitions. [2023-11-19 07:40:35,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 9.620689655172415) internal successors, (279), 28 states have internal predecessors, (279), 9 states have call successors, (122), 5 states have call predecessors, (122), 12 states have return successors, (123), 9 states have call predecessors, (123), 9 states have call successors, (123) [2023-11-19 07:40:35,809 INFO L276 IsEmpty]: Start isEmpty. Operand 3966 states and 6012 transitions. [2023-11-19 07:40:35,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2023-11-19 07:40:35,816 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:40:35,817 INFO L195 NwaCegarLoop]: trace histogram [65, 65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:40:35,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef5c553-d058-4b5f-9297-0f861382f03a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-19 07:40:36,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef5c553-d058-4b5f-9297-0f861382f03a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:36,043 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:40:36,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:40:36,043 INFO L85 PathProgramCache]: Analyzing trace with hash -881826428, now seen corresponding path program 1 times [2023-11-19 07:40:36,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:40:36,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039487786] [2023-11-19 07:40:36,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:36,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:40:36,173 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:40:36,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1605230552] [2023-11-19 07:40:36,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:40:36,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:40:36,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef5c553-d058-4b5f-9297-0f861382f03a/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:40:36,176 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef5c553-d058-4b5f-9297-0f861382f03a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:40:36,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef5c553-d058-4b5f-9297-0f861382f03a/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-19 07:40:36,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:40:36,909 INFO L262 TraceCheckSpWp]: Trace formula consists of 1190 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-19 07:40:36,922 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:40:37,503 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 3574 proven. 57 refuted. 0 times theorem prover too weak. 4689 trivial. 0 not checked. [2023-11-19 07:40:37,504 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:40:38,058 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8320 trivial. 0 not checked. [2023-11-19 07:40:38,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:40:38,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039487786] [2023-11-19 07:40:38,058 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:40:38,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605230552] [2023-11-19 07:40:38,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605230552] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 07:40:38,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:40:38,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 13 [2023-11-19 07:40:38,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085940405] [2023-11-19 07:40:38,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:40:38,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 07:40:38,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:40:38,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:40:38,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2023-11-19 07:40:38,063 INFO L87 Difference]: Start difference. First operand 3966 states and 6012 transitions. Second operand has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 1 states have call successors, (65), 1 states have call predecessors, (65), 1 states have return successors, (65), 1 states have call predecessors, (65), 1 states have call successors, (65)