./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-54.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-54.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 124f542de58268720c569766c8149c9f6f42e5c81be4e71c16760db5f134f6f4 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:01:48,900 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:01:48,968 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:01:48,973 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:01:48,976 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:01:49,014 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:01:49,016 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:01:49,016 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:01:49,017 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:01:49,022 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:01:49,023 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:01:49,024 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:01:49,024 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:01:49,026 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:01:49,027 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:01:49,027 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:01:49,028 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:01:49,028 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:01:49,029 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:01:49,029 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:01:49,030 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:01:49,031 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:01:49,031 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:01:49,032 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:01:49,032 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:01:49,033 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:01:49,034 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:01:49,034 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:01:49,035 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:01:49,035 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:01:49,036 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:01:49,037 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:01:49,037 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:01:49,037 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:01:49,038 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:01:49,038 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:01:49,038 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:01:49,038 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:01:49,039 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:01:49,039 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_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 124f542de58268720c569766c8149c9f6f42e5c81be4e71c16760db5f134f6f4 [2023-11-06 22:01:49,407 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:01:49,434 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:01:49,439 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:01:49,441 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:01:49,442 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:01:49,443 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-54.i [2023-11-06 22:01:52,571 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:01:52,972 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:01:52,973 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-54.i [2023-11-06 22:01:52,994 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/data/a2c9e2301/6fa4108c82324de8a232155e6a169d43/FLAGb375176ef [2023-11-06 22:01:53,018 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/data/a2c9e2301/6fa4108c82324de8a232155e6a169d43 [2023-11-06 22:01:53,028 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:01:53,029 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:01:53,031 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:01:53,031 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:01:53,040 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:01:53,041 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:01:53" (1/1) ... [2023-11-06 22:01:53,042 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b38e7c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:01:53, skipping insertion in model container [2023-11-06 22:01:53,043 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:01:53" (1/1) ... [2023-11-06 22:01:53,181 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:01:53,363 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_d5415246-1b7b-419d-803c-0ee1014f7547/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-54.i[916,929] [2023-11-06 22:01:53,658 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:01:53,683 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:01:53,696 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_d5415246-1b7b-419d-803c-0ee1014f7547/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-54.i[916,929] [2023-11-06 22:01:53,866 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:01:53,895 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:01:53,896 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:01:53 WrapperNode [2023-11-06 22:01:53,896 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:01:53,897 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:01:53,898 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:01:53,898 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:01:53,907 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:01:53" (1/1) ... [2023-11-06 22:01:53,947 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:01:53" (1/1) ... [2023-11-06 22:01:54,088 INFO L138 Inliner]: procedures = 26, calls = 75, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 678 [2023-11-06 22:01:54,089 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:01:54,090 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:01:54,090 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:01:54,091 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:01:54,101 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:01:53" (1/1) ... [2023-11-06 22:01:54,101 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:01:53" (1/1) ... [2023-11-06 22:01:54,124 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:01:53" (1/1) ... [2023-11-06 22:01:54,124 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:01:53" (1/1) ... [2023-11-06 22:01:54,190 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:01:53" (1/1) ... [2023-11-06 22:01:54,199 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:01:53" (1/1) ... [2023-11-06 22:01:54,217 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:01:53" (1/1) ... [2023-11-06 22:01:54,229 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:01:53" (1/1) ... [2023-11-06 22:01:54,251 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:01:54,252 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:01:54,252 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:01:54,252 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:01:54,253 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:01:53" (1/1) ... [2023-11-06 22:01:54,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:01:54,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:01:54,296 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:01:54,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:01:54,343 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:01:54,344 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-06 22:01:54,344 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-06 22:01:54,344 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:01:54,344 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:01:54,345 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:01:54,504 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:01:54,506 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:01:55,911 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:01:55,924 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:01:55,924 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-06 22:01:55,927 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:01:55 BoogieIcfgContainer [2023-11-06 22:01:55,928 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:01:55,931 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:01:55,931 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:01:55,935 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:01:55,936 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:01:53" (1/3) ... [2023-11-06 22:01:55,937 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ae8e26b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:01:55, skipping insertion in model container [2023-11-06 22:01:55,937 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:01:53" (2/3) ... [2023-11-06 22:01:55,937 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ae8e26b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:01:55, skipping insertion in model container [2023-11-06 22:01:55,937 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:01:55" (3/3) ... [2023-11-06 22:01:55,939 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount500_file-54.i [2023-11-06 22:01:56,010 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:01:56,013 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 22:01:56,109 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:01:56,117 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7d54eca6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:01:56,117 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 22:01:56,125 INFO L276 IsEmpty]: Start isEmpty. Operand has 263 states, 198 states have (on average 1.5909090909090908) internal successors, (315), 199 states have internal predecessors, (315), 62 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 62 states have call predecessors, (62), 62 states have call successors, (62) [2023-11-06 22:01:56,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 436 [2023-11-06 22:01:56,171 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:01:56,172 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:01:56,173 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:01:56,180 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:01:56,181 INFO L85 PathProgramCache]: Analyzing trace with hash 235648627, now seen corresponding path program 1 times [2023-11-06 22:01:56,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:01:56,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496579204] [2023-11-06 22:01:56,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:01:56,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:01:56,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:01:56,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:01:56,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496579204] [2023-11-06 22:01:56,880 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-06 22:01:56,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169978617] [2023-11-06 22:01:56,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:01:56,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:01:56,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:01:56,886 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:01:56,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:01:57,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:01:57,445 INFO L262 TraceCheckSpWp]: Trace formula consists of 1186 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-06 22:01:57,483 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:01:57,595 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 7442 trivial. 0 not checked. [2023-11-06 22:01:57,595 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:01:57,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169978617] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:01:57,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:01:57,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:01:57,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37280782] [2023-11-06 22:01:57,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:01:57,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 22:01:57,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:01:57,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 22:01:57,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 22:01:57,674 INFO L87 Difference]: Start difference. First operand has 263 states, 198 states have (on average 1.5909090909090908) internal successors, (315), 199 states have internal predecessors, (315), 62 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 62 states have call predecessors, (62), 62 states have call successors, (62) Second operand has 2 states, 2 states have (on average 65.0) internal successors, (130), 2 states have internal predecessors, (130), 2 states have call successors, (62), 2 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 2 states have call successors, (62) [2023-11-06 22:01:57,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:01:57,769 INFO L93 Difference]: Finished difference Result 519 states and 934 transitions. [2023-11-06 22:01:57,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 22:01:57,775 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 65.0) internal successors, (130), 2 states have internal predecessors, (130), 2 states have call successors, (62), 2 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 2 states have call successors, (62) Word has length 435 [2023-11-06 22:01:57,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:01:57,788 INFO L225 Difference]: With dead ends: 519 [2023-11-06 22:01:57,788 INFO L226 Difference]: Without dead ends: 259 [2023-11-06 22:01:57,795 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 434 GetRequests, 434 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 22:01:57,799 INFO L413 NwaCegarLoop]: 432 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, 432 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 [2023-11-06 22:01:57,800 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:01:57,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2023-11-06 22:01:57,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 259. [2023-11-06 22:01:57,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 195 states have (on average 1.5794871794871794) internal successors, (308), 195 states have internal predecessors, (308), 62 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 62 states have call predecessors, (62), 62 states have call successors, (62) [2023-11-06 22:01:57,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 432 transitions. [2023-11-06 22:01:57,889 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 432 transitions. Word has length 435 [2023-11-06 22:01:57,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:01:57,890 INFO L495 AbstractCegarLoop]: Abstraction has 259 states and 432 transitions. [2023-11-06 22:01:57,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 65.0) internal successors, (130), 2 states have internal predecessors, (130), 2 states have call successors, (62), 2 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 2 states have call successors, (62) [2023-11-06 22:01:57,890 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 432 transitions. [2023-11-06 22:01:57,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 436 [2023-11-06 22:01:57,906 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:01:57,907 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:01:57,919 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-06 22:01:58,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-06 22:01:58,117 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:01:58,117 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:01:58,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1074873625, now seen corresponding path program 1 times [2023-11-06 22:01:58,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:01:58,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384102907] [2023-11-06 22:01:58,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:01:58,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:01:58,311 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:01:58,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1308091656] [2023-11-06 22:01:58,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:01:58,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:01:58,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:01:58,314 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:01:58,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:01:58,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:01:58,843 INFO L262 TraceCheckSpWp]: Trace formula consists of 1186 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:01:58,859 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:01:59,654 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7564 trivial. 0 not checked. [2023-11-06 22:01:59,654 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:01:59,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:01:59,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384102907] [2023-11-06 22:01:59,658 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:01:59,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308091656] [2023-11-06 22:01:59,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308091656] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:01:59,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:01:59,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:01:59,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670822380] [2023-11-06 22:01:59,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:01:59,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:01:59,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:01:59,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:01:59,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:01:59,671 INFO L87 Difference]: Start difference. First operand 259 states and 432 transitions. Second operand has 4 states, 4 states have (on average 32.0) internal successors, (128), 3 states have internal predecessors, (128), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) [2023-11-06 22:02:00,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:02:00,151 INFO L93 Difference]: Finished difference Result 815 states and 1368 transitions. [2023-11-06 22:02:00,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:02:00,153 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.0) internal successors, (128), 3 states have internal predecessors, (128), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) Word has length 435 [2023-11-06 22:02:00,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:02:00,172 INFO L225 Difference]: With dead ends: 815 [2023-11-06 22:02:00,172 INFO L226 Difference]: Without dead ends: 559 [2023-11-06 22:02:00,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 432 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:02:00,176 INFO L413 NwaCegarLoop]: 425 mSDtfsCounter, 483 mSDsluCounter, 914 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 483 SdHoareTripleChecker+Valid, 1339 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:02:00,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [483 Valid, 1339 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 22:02:00,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2023-11-06 22:02:00,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 491. [2023-11-06 22:02:00,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 364 states have (on average 1.585164835164835) internal successors, (577), 364 states have internal predecessors, (577), 124 states have call successors, (124), 2 states have call predecessors, (124), 2 states have return successors, (124), 124 states have call predecessors, (124), 124 states have call successors, (124) [2023-11-06 22:02:00,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 825 transitions. [2023-11-06 22:02:00,337 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 825 transitions. Word has length 435 [2023-11-06 22:02:00,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:02:00,342 INFO L495 AbstractCegarLoop]: Abstraction has 491 states and 825 transitions. [2023-11-06 22:02:00,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.0) internal successors, (128), 3 states have internal predecessors, (128), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) [2023-11-06 22:02:00,344 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 825 transitions. [2023-11-06 22:02:00,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2023-11-06 22:02:00,354 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:02:00,355 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:02:00,374 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:02:00,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:02:00,575 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:02:00,576 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:02:00,576 INFO L85 PathProgramCache]: Analyzing trace with hash 422585617, now seen corresponding path program 1 times [2023-11-06 22:02:00,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:02:00,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770860673] [2023-11-06 22:02:00,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:02:00,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:02:00,739 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:02:00,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1900328593] [2023-11-06 22:02:00,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:02:00,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:02:00,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:02:00,746 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:02:00,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:02:01,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:02:01,216 INFO L262 TraceCheckSpWp]: Trace formula consists of 1187 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:02:01,257 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:02:01,814 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7564 trivial. 0 not checked. [2023-11-06 22:02:01,815 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:02:01,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:02:01,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770860673] [2023-11-06 22:02:01,815 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:02:01,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900328593] [2023-11-06 22:02:01,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900328593] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:02:01,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:02:01,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:02:01,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582850592] [2023-11-06 22:02:01,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:02:01,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:02:01,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:02:01,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:02:01,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:02:01,820 INFO L87 Difference]: Start difference. First operand 491 states and 825 transitions. Second operand has 4 states, 4 states have (on average 32.25) internal successors, (129), 3 states have internal predecessors, (129), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) [2023-11-06 22:02:02,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:02:02,133 INFO L93 Difference]: Finished difference Result 1102 states and 1875 transitions. [2023-11-06 22:02:02,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:02:02,134 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 3 states have internal predecessors, (129), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) Word has length 436 [2023-11-06 22:02:02,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:02:02,142 INFO L225 Difference]: With dead ends: 1102 [2023-11-06 22:02:02,142 INFO L226 Difference]: Without dead ends: 736 [2023-11-06 22:02:02,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 436 GetRequests, 433 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:02:02,145 INFO L413 NwaCegarLoop]: 426 mSDtfsCounter, 480 mSDsluCounter, 839 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 480 SdHoareTripleChecker+Valid, 1265 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:02:02,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [480 Valid, 1265 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:02:02,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2023-11-06 22:02:02,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 712. [2023-11-06 22:02:02,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 712 states, 585 states have (on average 1.6547008547008546) internal successors, (968), 585 states have internal predecessors, (968), 124 states have call successors, (124), 2 states have call predecessors, (124), 2 states have return successors, (124), 124 states have call predecessors, (124), 124 states have call successors, (124) [2023-11-06 22:02:02,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 1216 transitions. [2023-11-06 22:02:02,209 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 1216 transitions. Word has length 436 [2023-11-06 22:02:02,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:02:02,211 INFO L495 AbstractCegarLoop]: Abstraction has 712 states and 1216 transitions. [2023-11-06 22:02:02,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 3 states have internal predecessors, (129), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) [2023-11-06 22:02:02,211 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 1216 transitions. [2023-11-06 22:02:02,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2023-11-06 22:02:02,216 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:02:02,216 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:02:02,230 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:02:02,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:02:02,426 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:02:02,426 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:02:02,427 INFO L85 PathProgramCache]: Analyzing trace with hash 449651219, now seen corresponding path program 1 times [2023-11-06 22:02:02,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:02:02,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366036479] [2023-11-06 22:02:02,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:02:02,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:02:02,551 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:02:02,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1028245358] [2023-11-06 22:02:02,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:02:02,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:02:02,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:02:02,554 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:02:02,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:02:03,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:02:03,060 INFO L262 TraceCheckSpWp]: Trace formula consists of 1189 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:02:03,071 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:02:03,132 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7564 trivial. 0 not checked. [2023-11-06 22:02:03,132 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:02:03,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:02:03,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366036479] [2023-11-06 22:02:03,133 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:02:03,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028245358] [2023-11-06 22:02:03,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028245358] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:02:03,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:02:03,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:02:03,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466213579] [2023-11-06 22:02:03,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:02:03,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:02:03,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:02:03,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:02:03,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:02:03,137 INFO L87 Difference]: Start difference. First operand 712 states and 1216 transitions. Second operand has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) [2023-11-06 22:02:03,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:02:03,292 INFO L93 Difference]: Finished difference Result 1781 states and 3067 transitions. [2023-11-06 22:02:03,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:02:03,294 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) Word has length 436 [2023-11-06 22:02:03,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:02:03,310 INFO L225 Difference]: With dead ends: 1781 [2023-11-06 22:02:03,311 INFO L226 Difference]: Without dead ends: 1210 [2023-11-06 22:02:03,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 434 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:02:03,316 INFO L413 NwaCegarLoop]: 641 mSDtfsCounter, 257 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 1045 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:02:03,318 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 1045 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:02:03,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1210 states. [2023-11-06 22:02:03,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1210 to 1207. [2023-11-06 22:02:03,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1207 states, 1073 states have (on average 1.6877912395153774) internal successors, (1811), 1074 states have internal predecessors, (1811), 129 states have call successors, (129), 4 states have call predecessors, (129), 4 states have return successors, (129), 128 states have call predecessors, (129), 129 states have call successors, (129) [2023-11-06 22:02:03,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1207 states to 1207 states and 2069 transitions. [2023-11-06 22:02:03,428 INFO L78 Accepts]: Start accepts. Automaton has 1207 states and 2069 transitions. Word has length 436 [2023-11-06 22:02:03,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:02:03,430 INFO L495 AbstractCegarLoop]: Abstraction has 1207 states and 2069 transitions. [2023-11-06 22:02:03,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) [2023-11-06 22:02:03,430 INFO L276 IsEmpty]: Start isEmpty. Operand 1207 states and 2069 transitions. [2023-11-06 22:02:03,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2023-11-06 22:02:03,439 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:02:03,439 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:02:03,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:02:03,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:02:03,655 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:02:03,656 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:02:03,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1999089395, now seen corresponding path program 1 times [2023-11-06 22:02:03,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:02:03,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689497151] [2023-11-06 22:02:03,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:02:03,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:02:03,757 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:02:03,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [272387877] [2023-11-06 22:02:03,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:02:03,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:02:03,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:02:03,759 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:02:03,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:02:04,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:02:04,295 INFO L262 TraceCheckSpWp]: Trace formula consists of 1186 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:02:04,305 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:02:04,409 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7564 trivial. 0 not checked. [2023-11-06 22:02:04,409 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:02:04,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:02:04,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689497151] [2023-11-06 22:02:04,410 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:02:04,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272387877] [2023-11-06 22:02:04,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272387877] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:02:04,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:02:04,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:02:04,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281442305] [2023-11-06 22:02:04,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:02:04,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:02:04,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:02:04,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:02:04,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:02:04,415 INFO L87 Difference]: Start difference. First operand 1207 states and 2069 transitions. Second operand has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) [2023-11-06 22:02:04,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:02:04,550 INFO L93 Difference]: Finished difference Result 2915 states and 5020 transitions. [2023-11-06 22:02:04,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:02:04,551 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) Word has length 436 [2023-11-06 22:02:04,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:02:04,567 INFO L225 Difference]: With dead ends: 2915 [2023-11-06 22:02:04,567 INFO L226 Difference]: Without dead ends: 2000 [2023-11-06 22:02:04,570 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 434 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:02:04,571 INFO L413 NwaCegarLoop]: 490 mSDtfsCounter, 214 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 899 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:02:04,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 899 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:02:04,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2000 states. [2023-11-06 22:02:04,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2000 to 1997. [2023-11-06 22:02:04,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1997 states, 1832 states have (on average 1.6899563318777293) internal successors, (3096), 1835 states have internal predecessors, (3096), 158 states have call successors, (158), 6 states have call predecessors, (158), 6 states have return successors, (158), 155 states have call predecessors, (158), 158 states have call successors, (158) [2023-11-06 22:02:04,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1997 states to 1997 states and 3412 transitions. [2023-11-06 22:02:04,684 INFO L78 Accepts]: Start accepts. Automaton has 1997 states and 3412 transitions. Word has length 436 [2023-11-06 22:02:04,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:02:04,685 INFO L495 AbstractCegarLoop]: Abstraction has 1997 states and 3412 transitions. [2023-11-06 22:02:04,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) [2023-11-06 22:02:04,686 INFO L276 IsEmpty]: Start isEmpty. Operand 1997 states and 3412 transitions. [2023-11-06 22:02:04,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2023-11-06 22:02:04,691 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:02:04,692 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:02:04,707 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:02:04,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:02:04,903 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:02:04,903 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:02:04,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1151649355, now seen corresponding path program 1 times [2023-11-06 22:02:04,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:02:04,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167364944] [2023-11-06 22:02:04,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:02:04,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:02:04,995 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:02:04,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2080379671] [2023-11-06 22:02:04,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:02:04,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:02:04,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:02:04,997 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:02:05,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:02:05,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:02:05,522 INFO L262 TraceCheckSpWp]: Trace formula consists of 1183 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 22:02:05,532 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:02:05,627 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7564 trivial. 0 not checked. [2023-11-06 22:02:05,627 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:02:05,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:02:05,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167364944] [2023-11-06 22:02:05,628 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:02:05,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080379671] [2023-11-06 22:02:05,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080379671] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:02:05,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:02:05,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:02:05,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132797980] [2023-11-06 22:02:05,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:02:05,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:02:05,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:02:05,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:02:05,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:02:05,632 INFO L87 Difference]: Start difference. First operand 1997 states and 3412 transitions. Second operand has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) [2023-11-06 22:02:05,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:02:05,786 INFO L93 Difference]: Finished difference Result 4998 states and 8537 transitions. [2023-11-06 22:02:05,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:02:05,787 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) Word has length 436 [2023-11-06 22:02:05,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:02:05,811 INFO L225 Difference]: With dead ends: 4998 [2023-11-06 22:02:05,812 INFO L226 Difference]: Without dead ends: 3495 [2023-11-06 22:02:05,815 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 436 GetRequests, 433 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:02:05,816 INFO L413 NwaCegarLoop]: 636 mSDtfsCounter, 347 mSDsluCounter, 1054 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 1690 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:02:05,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [347 Valid, 1690 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:02:05,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3495 states. [2023-11-06 22:02:05,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3495 to 2997. [2023-11-06 22:02:05,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2997 states, 2832 states have (on average 1.7146892655367232) internal successors, (4856), 2835 states have internal predecessors, (4856), 158 states have call successors, (158), 6 states have call predecessors, (158), 6 states have return successors, (158), 155 states have call predecessors, (158), 158 states have call successors, (158) [2023-11-06 22:02:05,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2997 states to 2997 states and 5172 transitions. [2023-11-06 22:02:05,964 INFO L78 Accepts]: Start accepts. Automaton has 2997 states and 5172 transitions. Word has length 436 [2023-11-06 22:02:05,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:02:05,965 INFO L495 AbstractCegarLoop]: Abstraction has 2997 states and 5172 transitions. [2023-11-06 22:02:05,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) [2023-11-06 22:02:05,966 INFO L276 IsEmpty]: Start isEmpty. Operand 2997 states and 5172 transitions. [2023-11-06 22:02:05,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2023-11-06 22:02:05,971 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:02:05,972 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:02:05,985 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 22:02:06,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-06 22:02:06,180 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:02:06,181 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:02:06,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1725638475, now seen corresponding path program 1 times [2023-11-06 22:02:06,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:02:06,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067051386] [2023-11-06 22:02:06,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:02:06,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:02:06,311 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:02:06,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [693304851] [2023-11-06 22:02:06,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:02:06,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:02:06,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:02:06,314 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:02:06,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 22:02:06,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:02:06,838 INFO L262 TraceCheckSpWp]: Trace formula consists of 1185 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 22:02:06,848 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:02:06,988 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7564 trivial. 0 not checked. [2023-11-06 22:02:06,988 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:02:06,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:02:06,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067051386] [2023-11-06 22:02:06,989 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:02:06,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693304851] [2023-11-06 22:02:06,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693304851] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:02:06,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:02:06,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:02:06,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282275505] [2023-11-06 22:02:06,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:02:06,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:02:06,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:02:06,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:02:06,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:02:06,994 INFO L87 Difference]: Start difference. First operand 2997 states and 5172 transitions. Second operand has 5 states, 5 states have (on average 25.8) internal successors, (129), 5 states have internal predecessors, (129), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) [2023-11-06 22:02:07,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:02:07,494 INFO L93 Difference]: Finished difference Result 8559 states and 14766 transitions. [2023-11-06 22:02:07,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:02:07,495 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.8) internal successors, (129), 5 states have internal predecessors, (129), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) Word has length 436 [2023-11-06 22:02:07,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:02:07,533 INFO L225 Difference]: With dead ends: 8559 [2023-11-06 22:02:07,533 INFO L226 Difference]: Without dead ends: 5810 [2023-11-06 22:02:07,539 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 436 GetRequests, 432 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:02:07,540 INFO L413 NwaCegarLoop]: 662 mSDtfsCounter, 405 mSDsluCounter, 1359 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 2021 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:02:07,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [405 Valid, 2021 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 22:02:07,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5810 states. [2023-11-06 22:02:07,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5810 to 5712. [2023-11-06 22:02:07,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5712 states, 5447 states have (on average 1.7060767394896272) internal successors, (9293), 5453 states have internal predecessors, (9293), 254 states have call successors, (254), 10 states have call predecessors, (254), 10 states have return successors, (254), 248 states have call predecessors, (254), 254 states have call successors, (254) [2023-11-06 22:02:07,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5712 states to 5712 states and 9801 transitions. [2023-11-06 22:02:07,860 INFO L78 Accepts]: Start accepts. Automaton has 5712 states and 9801 transitions. Word has length 436 [2023-11-06 22:02:07,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:02:07,861 INFO L495 AbstractCegarLoop]: Abstraction has 5712 states and 9801 transitions. [2023-11-06 22:02:07,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.8) internal successors, (129), 5 states have internal predecessors, (129), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) [2023-11-06 22:02:07,862 INFO L276 IsEmpty]: Start isEmpty. Operand 5712 states and 9801 transitions. [2023-11-06 22:02:07,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2023-11-06 22:02:07,869 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:02:07,870 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:02:07,886 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 22:02:08,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:02:08,086 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:02:08,087 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:02:08,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1558211571, now seen corresponding path program 1 times [2023-11-06 22:02:08,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:02:08,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700967001] [2023-11-06 22:02:08,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:02:08,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:02:08,170 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:02:08,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [173635400] [2023-11-06 22:02:08,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:02:08,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:02:08,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:02:08,172 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:02:08,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 22:02:08,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:02:08,708 INFO L262 TraceCheckSpWp]: Trace formula consists of 1182 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:02:08,718 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:02:09,249 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 3291 proven. 126 refuted. 0 times theorem prover too weak. 4147 trivial. 0 not checked. [2023-11-06 22:02:09,250 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:02:09,718 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 57 proven. 126 refuted. 0 times theorem prover too weak. 7381 trivial. 0 not checked. [2023-11-06 22:02:09,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:02:09,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700967001] [2023-11-06 22:02:09,719 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:02:09,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173635400] [2023-11-06 22:02:09,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173635400] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:02:09,720 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:02:09,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-06 22:02:09,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463362914] [2023-11-06 22:02:09,720 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:02:09,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:02:09,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:02:09,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:02:09,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:02:09,725 INFO L87 Difference]: Start difference. First operand 5712 states and 9801 transitions. Second operand has 8 states, 8 states have (on average 28.5) internal successors, (228), 8 states have internal predecessors, (228), 3 states have call successors, (104), 2 states have call predecessors, (104), 4 states have return successors, (105), 3 states have call predecessors, (105), 3 states have call successors, (105) [2023-11-06 22:02:10,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:02:10,323 INFO L93 Difference]: Finished difference Result 10362 states and 17737 transitions. [2023-11-06 22:02:10,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:02:10,324 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 28.5) internal successors, (228), 8 states have internal predecessors, (228), 3 states have call successors, (104), 2 states have call predecessors, (104), 4 states have return successors, (105), 3 states have call predecessors, (105), 3 states have call successors, (105) Word has length 436 [2023-11-06 22:02:10,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:02:10,359 INFO L225 Difference]: With dead ends: 10362 [2023-11-06 22:02:10,360 INFO L226 Difference]: Without dead ends: 5738 [2023-11-06 22:02:10,368 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 874 GetRequests, 864 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:02:10,369 INFO L413 NwaCegarLoop]: 342 mSDtfsCounter, 450 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 469 SdHoareTripleChecker+Valid, 900 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 22:02:10,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [469 Valid, 900 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 22:02:10,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5738 states. [2023-11-06 22:02:10,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5738 to 5732. [2023-11-06 22:02:10,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5732 states, 5462 states have (on average 1.6924203588429148) internal successors, (9244), 5468 states have internal predecessors, (9244), 254 states have call successors, (254), 15 states have call predecessors, (254), 15 states have return successors, (254), 248 states have call predecessors, (254), 254 states have call successors, (254) [2023-11-06 22:02:10,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5732 states to 5732 states and 9752 transitions. [2023-11-06 22:02:10,699 INFO L78 Accepts]: Start accepts. Automaton has 5732 states and 9752 transitions. Word has length 436 [2023-11-06 22:02:10,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:02:10,701 INFO L495 AbstractCegarLoop]: Abstraction has 5732 states and 9752 transitions. [2023-11-06 22:02:10,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 28.5) internal successors, (228), 8 states have internal predecessors, (228), 3 states have call successors, (104), 2 states have call predecessors, (104), 4 states have return successors, (105), 3 states have call predecessors, (105), 3 states have call successors, (105) [2023-11-06 22:02:10,702 INFO L276 IsEmpty]: Start isEmpty. Operand 5732 states and 9752 transitions. [2023-11-06 22:02:10,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 438 [2023-11-06 22:02:10,710 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:02:10,711 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:02:10,728 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 22:02:10,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:02:10,922 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:02:10,923 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:02:10,923 INFO L85 PathProgramCache]: Analyzing trace with hash -578628898, now seen corresponding path program 1 times [2023-11-06 22:02:10,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:02:10,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400778537] [2023-11-06 22:02:10,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:02:10,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:02:11,012 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:02:11,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [608345137] [2023-11-06 22:02:11,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:02:11,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:02:11,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:02:11,014 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:02:11,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 22:02:11,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:02:11,569 INFO L262 TraceCheckSpWp]: Trace formula consists of 1182 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 22:02:11,580 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:02:12,291 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7564 trivial. 0 not checked. [2023-11-06 22:02:12,291 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:02:12,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:02:12,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400778537] [2023-11-06 22:02:12,292 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:02:12,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608345137] [2023-11-06 22:02:12,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608345137] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:02:12,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:02:12,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:02:12,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082705085] [2023-11-06 22:02:12,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:02:12,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:02:12,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:02:12,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:02:12,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:02:12,296 INFO L87 Difference]: Start difference. First operand 5732 states and 9752 transitions. Second operand has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 5 states have internal predecessors, (130), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) [2023-11-06 22:02:13,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:02:13,049 INFO L93 Difference]: Finished difference Result 14391 states and 24461 transitions. [2023-11-06 22:02:13,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 22:02:13,050 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 5 states have internal predecessors, (130), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) Word has length 437 [2023-11-06 22:02:13,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:02:13,088 INFO L225 Difference]: With dead ends: 14391 [2023-11-06 22:02:13,088 INFO L226 Difference]: Without dead ends: 8812 [2023-11-06 22:02:13,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 439 GetRequests, 432 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-11-06 22:02:13,100 INFO L413 NwaCegarLoop]: 454 mSDtfsCounter, 1568 mSDsluCounter, 2046 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 258 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1568 SdHoareTripleChecker+Valid, 2500 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 258 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 22:02:13,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1568 Valid, 2500 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [258 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 22:02:13,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8812 states. [2023-11-06 22:02:13,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8812 to 6739. [2023-11-06 22:02:13,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6739 states, 6367 states have (on average 1.677713208732527) internal successors, (10682), 6376 states have internal predecessors, (10682), 350 states have call successors, (350), 21 states have call predecessors, (350), 21 states have return successors, (350), 341 states have call predecessors, (350), 350 states have call successors, (350) [2023-11-06 22:02:13,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6739 states to 6739 states and 11382 transitions. [2023-11-06 22:02:13,461 INFO L78 Accepts]: Start accepts. Automaton has 6739 states and 11382 transitions. Word has length 437 [2023-11-06 22:02:13,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:02:13,462 INFO L495 AbstractCegarLoop]: Abstraction has 6739 states and 11382 transitions. [2023-11-06 22:02:13,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 5 states have internal predecessors, (130), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) [2023-11-06 22:02:13,462 INFO L276 IsEmpty]: Start isEmpty. Operand 6739 states and 11382 transitions. [2023-11-06 22:02:13,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 438 [2023-11-06 22:02:13,468 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:02:13,469 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:02:13,482 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 22:02:13,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:02:13,678 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:02:13,678 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:02:13,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1490526110, now seen corresponding path program 1 times [2023-11-06 22:02:13,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:02:13,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295322136] [2023-11-06 22:02:13,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:02:13,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:02:13,766 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:02:13,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1149105854] [2023-11-06 22:02:13,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:02:13,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:02:13,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:02:13,768 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:02:13,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 22:02:14,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:02:14,346 INFO L262 TraceCheckSpWp]: Trace formula consists of 1185 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 22:02:14,366 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:02:14,466 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7564 trivial. 0 not checked. [2023-11-06 22:02:14,467 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:02:14,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:02:14,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295322136] [2023-11-06 22:02:14,467 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:02:14,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149105854] [2023-11-06 22:02:14,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149105854] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:02:14,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:02:14,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:02:14,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31483485] [2023-11-06 22:02:14,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:02:14,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:02:14,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:02:14,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:02:14,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:02:14,471 INFO L87 Difference]: Start difference. First operand 6739 states and 11382 transitions. Second operand has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) [2023-11-06 22:02:14,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:02:14,821 INFO L93 Difference]: Finished difference Result 15178 states and 25484 transitions. [2023-11-06 22:02:14,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:02:14,822 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) Word has length 437 [2023-11-06 22:02:14,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:02:14,851 INFO L225 Difference]: With dead ends: 15178 [2023-11-06 22:02:14,852 INFO L226 Difference]: Without dead ends: 9214 [2023-11-06 22:02:14,863 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 434 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:02:14,864 INFO L413 NwaCegarLoop]: 630 mSDtfsCounter, 342 mSDsluCounter, 1047 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 1677 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:02:14,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [342 Valid, 1677 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:02:14,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9214 states. [2023-11-06 22:02:15,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9214 to 7767. [2023-11-06 22:02:15,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7767 states, 7395 states have (on average 1.681947261663286) internal successors, (12438), 7404 states have internal predecessors, (12438), 350 states have call successors, (350), 21 states have call predecessors, (350), 21 states have return successors, (350), 341 states have call predecessors, (350), 350 states have call successors, (350) [2023-11-06 22:02:15,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7767 states to 7767 states and 13138 transitions. [2023-11-06 22:02:15,255 INFO L78 Accepts]: Start accepts. Automaton has 7767 states and 13138 transitions. Word has length 437 [2023-11-06 22:02:15,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:02:15,257 INFO L495 AbstractCegarLoop]: Abstraction has 7767 states and 13138 transitions. [2023-11-06 22:02:15,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) [2023-11-06 22:02:15,257 INFO L276 IsEmpty]: Start isEmpty. Operand 7767 states and 13138 transitions. [2023-11-06 22:02:15,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 438 [2023-11-06 22:02:15,263 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:02:15,264 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:02:15,284 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 22:02:15,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:02:15,475 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:02:15,476 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:02:15,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1793323936, now seen corresponding path program 1 times [2023-11-06 22:02:15,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:02:15,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395370891] [2023-11-06 22:02:15,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:02:15,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:02:15,552 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:02:15,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [90743880] [2023-11-06 22:02:15,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:02:15,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:02:15,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:02:15,555 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:02:15,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 22:02:16,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:02:16,263 INFO L262 TraceCheckSpWp]: Trace formula consists of 1182 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 22:02:16,279 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:02:16,836 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 981 proven. 171 refuted. 0 times theorem prover too weak. 6412 trivial. 0 not checked. [2023-11-06 22:02:16,836 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:02:17,246 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 12 proven. 171 refuted. 0 times theorem prover too weak. 7381 trivial. 0 not checked. [2023-11-06 22:02:17,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:02:17,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395370891] [2023-11-06 22:02:17,247 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:02:17,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90743880] [2023-11-06 22:02:17,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90743880] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:02:17,247 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:02:17,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-06 22:02:17,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291406663] [2023-11-06 22:02:17,248 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:02:17,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:02:17,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:02:17,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:02:17,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:02:17,252 INFO L87 Difference]: Start difference. First operand 7767 states and 13138 transitions. Second operand has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 states have internal predecessors, (139), 2 states have call successors, (119), 2 states have call predecessors, (119), 4 states have return successors, (120), 2 states have call predecessors, (120), 2 states have call successors, (120) [2023-11-06 22:02:17,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:02:17,946 INFO L93 Difference]: Finished difference Result 15094 states and 25466 transitions. [2023-11-06 22:02:17,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 22:02:17,947 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 states have internal predecessors, (139), 2 states have call successors, (119), 2 states have call predecessors, (119), 4 states have return successors, (120), 2 states have call predecessors, (120), 2 states have call successors, (120) Word has length 437 [2023-11-06 22:02:17,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:02:17,970 INFO L225 Difference]: With dead ends: 15094 [2023-11-06 22:02:17,971 INFO L226 Difference]: Without dead ends: 7853 [2023-11-06 22:02:17,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 877 GetRequests, 867 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:02:17,984 INFO L413 NwaCegarLoop]: 352 mSDtfsCounter, 443 mSDsluCounter, 576 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 928 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 22:02:17,985 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [445 Valid, 928 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 22:02:17,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7853 states. [2023-11-06 22:02:18,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7853 to 7771. [2023-11-06 22:02:18,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7771 states, 7410 states have (on average 1.6635627530364372) internal successors, (12327), 7419 states have internal predecessors, (12327), 332 states have call successors, (332), 28 states have call predecessors, (332), 28 states have return successors, (332), 323 states have call predecessors, (332), 332 states have call successors, (332) [2023-11-06 22:02:18,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7771 states to 7771 states and 12991 transitions. [2023-11-06 22:02:18,378 INFO L78 Accepts]: Start accepts. Automaton has 7771 states and 12991 transitions. Word has length 437 [2023-11-06 22:02:18,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:02:18,379 INFO L495 AbstractCegarLoop]: Abstraction has 7771 states and 12991 transitions. [2023-11-06 22:02:18,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 states have internal predecessors, (139), 2 states have call successors, (119), 2 states have call predecessors, (119), 4 states have return successors, (120), 2 states have call predecessors, (120), 2 states have call successors, (120) [2023-11-06 22:02:18,380 INFO L276 IsEmpty]: Start isEmpty. Operand 7771 states and 12991 transitions. [2023-11-06 22:02:18,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 438 [2023-11-06 22:02:18,385 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:02:18,386 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:02:18,395 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-06 22:02:18,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-06 22:02:18,595 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:02:18,596 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:02:18,596 INFO L85 PathProgramCache]: Analyzing trace with hash 763964638, now seen corresponding path program 1 times [2023-11-06 22:02:18,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:02:18,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689053479] [2023-11-06 22:02:18,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:02:18,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:02:18,675 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:02:18,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1014927290] [2023-11-06 22:02:18,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:02:18,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:02:18,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:02:18,677 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:02:18,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 22:02:19,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:02:19,257 INFO L262 TraceCheckSpWp]: Trace formula consists of 1180 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 22:02:19,267 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:02:20,206 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 1863 proven. 24 refuted. 0 times theorem prover too weak. 5677 trivial. 0 not checked. [2023-11-06 22:02:20,206 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:02:20,768 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 159 proven. 24 refuted. 0 times theorem prover too weak. 7381 trivial. 0 not checked. [2023-11-06 22:02:20,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:02:20,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689053479] [2023-11-06 22:02:20,769 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:02:20,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014927290] [2023-11-06 22:02:20,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014927290] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:02:20,770 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:02:20,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2023-11-06 22:02:20,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952096071] [2023-11-06 22:02:20,771 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:02:20,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-06 22:02:20,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:02:20,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-06 22:02:20,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2023-11-06 22:02:20,774 INFO L87 Difference]: Start difference. First operand 7771 states and 12991 transitions. Second operand has 16 states, 16 states have (on average 15.4375) internal successors, (247), 16 states have internal predecessors, (247), 4 states have call successors, (124), 3 states have call predecessors, (124), 5 states have return successors, (124), 4 states have call predecessors, (124), 4 states have call successors, (124) [2023-11-06 22:02:23,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:02:23,754 INFO L93 Difference]: Finished difference Result 25135 states and 41923 transitions. [2023-11-06 22:02:23,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-06 22:02:23,755 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 15.4375) internal successors, (247), 16 states have internal predecessors, (247), 4 states have call successors, (124), 3 states have call predecessors, (124), 5 states have return successors, (124), 4 states have call predecessors, (124), 4 states have call successors, (124) Word has length 437 [2023-11-06 22:02:23,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:02:23,802 INFO L225 Difference]: With dead ends: 25135 [2023-11-06 22:02:23,803 INFO L226 Difference]: Without dead ends: 18188 [2023-11-06 22:02:23,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 891 GetRequests, 862 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=272, Invalid=658, Unknown=0, NotChecked=0, Total=930 [2023-11-06 22:02:23,818 INFO L413 NwaCegarLoop]: 589 mSDtfsCounter, 2541 mSDsluCounter, 3727 mSDsCounter, 0 mSdLazyCounter, 1980 mSolverCounterSat, 671 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2602 SdHoareTripleChecker+Valid, 4316 SdHoareTripleChecker+Invalid, 2651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 671 IncrementalHoareTripleChecker+Valid, 1980 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:02:23,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2602 Valid, 4316 Invalid, 2651 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [671 Valid, 1980 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-11-06 22:02:23,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18188 states. [2023-11-06 22:02:24,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18188 to 14846. [2023-11-06 22:02:24,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14846 states, 14187 states have (on average 1.656093606823148) internal successors, (23495), 14205 states have internal predecessors, (23495), 602 states have call successors, (602), 56 states have call predecessors, (602), 56 states have return successors, (602), 584 states have call predecessors, (602), 602 states have call successors, (602) [2023-11-06 22:02:24,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14846 states to 14846 states and 24699 transitions. [2023-11-06 22:02:24,541 INFO L78 Accepts]: Start accepts. Automaton has 14846 states and 24699 transitions. Word has length 437 [2023-11-06 22:02:24,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:02:24,542 INFO L495 AbstractCegarLoop]: Abstraction has 14846 states and 24699 transitions. [2023-11-06 22:02:24,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 15.4375) internal successors, (247), 16 states have internal predecessors, (247), 4 states have call successors, (124), 3 states have call predecessors, (124), 5 states have return successors, (124), 4 states have call predecessors, (124), 4 states have call successors, (124) [2023-11-06 22:02:24,542 INFO L276 IsEmpty]: Start isEmpty. Operand 14846 states and 24699 transitions. [2023-11-06 22:02:24,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 438 [2023-11-06 22:02:24,550 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:02:24,551 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:02:24,561 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-06 22:02:24,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:02:24,761 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:02:24,761 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:02:24,762 INFO L85 PathProgramCache]: Analyzing trace with hash -154269432, now seen corresponding path program 1 times [2023-11-06 22:02:24,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:02:24,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346980351] [2023-11-06 22:02:24,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:02:24,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:02:24,846 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:02:24,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1148823538] [2023-11-06 22:02:24,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:02:24,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:02:24,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:02:24,848 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:02:24,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 22:02:25,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:02:25,461 INFO L262 TraceCheckSpWp]: Trace formula consists of 1182 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:02:25,470 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:02:25,571 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7564 trivial. 0 not checked. [2023-11-06 22:02:25,571 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:02:25,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:02:25,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346980351] [2023-11-06 22:02:25,573 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:02:25,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148823538] [2023-11-06 22:02:25,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148823538] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:02:25,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:02:25,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:02:25,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753462020] [2023-11-06 22:02:25,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:02:25,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:02:25,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:02:25,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:02:25,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:02:25,577 INFO L87 Difference]: Start difference. First operand 14846 states and 24699 transitions. Second operand has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) [2023-11-06 22:02:26,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:02:26,058 INFO L93 Difference]: Finished difference Result 28540 states and 47449 transitions. [2023-11-06 22:02:26,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:02:26,059 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) Word has length 437 [2023-11-06 22:02:26,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:02:26,104 INFO L225 Difference]: With dead ends: 28540 [2023-11-06 22:02:26,104 INFO L226 Difference]: Without dead ends: 14882 [2023-11-06 22:02:26,127 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 436 GetRequests, 435 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:02:26,129 INFO L413 NwaCegarLoop]: 566 mSDtfsCounter, 207 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 966 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:02:26,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 966 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:02:26,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14882 states. [2023-11-06 22:02:26,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14882 to 13944. [2023-11-06 22:02:26,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13944 states, 13458 states have (on average 1.6581958686283251) internal successors, (22316), 13464 states have internal predecessors, (22316), 446 states have call successors, (446), 39 states have call predecessors, (446), 39 states have return successors, (446), 440 states have call predecessors, (446), 446 states have call successors, (446) [2023-11-06 22:02:26,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13944 states to 13944 states and 23208 transitions. [2023-11-06 22:02:26,664 INFO L78 Accepts]: Start accepts. Automaton has 13944 states and 23208 transitions. Word has length 437 [2023-11-06 22:02:26,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:02:26,666 INFO L495 AbstractCegarLoop]: Abstraction has 13944 states and 23208 transitions. [2023-11-06 22:02:26,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) [2023-11-06 22:02:26,666 INFO L276 IsEmpty]: Start isEmpty. Operand 13944 states and 23208 transitions. [2023-11-06 22:02:26,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2023-11-06 22:02:26,673 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:02:26,673 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:02:26,687 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-06 22:02:26,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:02:26,883 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:02:26,883 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:02:26,883 INFO L85 PathProgramCache]: Analyzing trace with hash 124024627, now seen corresponding path program 1 times [2023-11-06 22:02:26,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:02:26,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468847630] [2023-11-06 22:02:26,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:02:26,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:02:26,956 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:02:26,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [513060293] [2023-11-06 22:02:26,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:02:26,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:02:26,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:02:26,959 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:02:26,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-06 22:02:27,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:02:27,676 INFO L262 TraceCheckSpWp]: Trace formula consists of 1181 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:02:27,689 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:02:29,183 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7564 trivial. 0 not checked. [2023-11-06 22:02:29,184 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:02:29,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:02:29,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468847630] [2023-11-06 22:02:29,184 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:02:29,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513060293] [2023-11-06 22:02:29,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513060293] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:02:29,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:02:29,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:02:29,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012041356] [2023-11-06 22:02:29,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:02:29,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:02:29,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:02:29,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:02:29,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:02:29,188 INFO L87 Difference]: Start difference. First operand 13944 states and 23208 transitions. Second operand has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 5 states have internal predecessors, (131), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) [2023-11-06 22:02:30,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:02:30,016 INFO L93 Difference]: Finished difference Result 28457 states and 47296 transitions. [2023-11-06 22:02:30,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:02:30,016 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 5 states have internal predecessors, (131), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) Word has length 438 [2023-11-06 22:02:30,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:02:30,082 INFO L225 Difference]: With dead ends: 28457 [2023-11-06 22:02:30,082 INFO L226 Difference]: Without dead ends: 15463 [2023-11-06 22:02:30,095 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 439 GetRequests, 433 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:02:30,095 INFO L413 NwaCegarLoop]: 659 mSDtfsCounter, 819 mSDsluCounter, 2263 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 819 SdHoareTripleChecker+Valid, 2922 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 22:02:30,096 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [819 Valid, 2922 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 22:02:30,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15463 states. [2023-11-06 22:02:30,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15463 to 14301. [2023-11-06 22:02:30,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14301 states, 13815 states have (on average 1.6549402823018458) internal successors, (22863), 13821 states have internal predecessors, (22863), 446 states have call successors, (446), 39 states have call predecessors, (446), 39 states have return successors, (446), 440 states have call predecessors, (446), 446 states have call successors, (446) [2023-11-06 22:02:30,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14301 states to 14301 states and 23755 transitions. [2023-11-06 22:02:30,596 INFO L78 Accepts]: Start accepts. Automaton has 14301 states and 23755 transitions. Word has length 438 [2023-11-06 22:02:30,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:02:30,597 INFO L495 AbstractCegarLoop]: Abstraction has 14301 states and 23755 transitions. [2023-11-06 22:02:30,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 5 states have internal predecessors, (131), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) [2023-11-06 22:02:30,598 INFO L276 IsEmpty]: Start isEmpty. Operand 14301 states and 23755 transitions. [2023-11-06 22:02:30,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2023-11-06 22:02:30,606 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:02:30,606 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:02:30,623 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-06 22:02:30,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:02:30,816 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:02:30,817 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:02:30,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1464323275, now seen corresponding path program 1 times [2023-11-06 22:02:30,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:02:30,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179079522] [2023-11-06 22:02:30,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:02:30,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:02:30,890 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:02:30,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [66934349] [2023-11-06 22:02:30,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:02:30,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:02:30,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:02:30,892 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:02:30,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-06 22:02:31,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:02:31,629 INFO L262 TraceCheckSpWp]: Trace formula consists of 1182 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-06 22:02:31,644 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:02:32,465 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7564 trivial. 0 not checked. [2023-11-06 22:02:32,465 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:02:32,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:02:32,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179079522] [2023-11-06 22:02:32,466 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:02:32,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66934349] [2023-11-06 22:02:32,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66934349] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:02:32,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:02:32,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-06 22:02:32,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420150725] [2023-11-06 22:02:32,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:02:32,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:02:32,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:02:32,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:02:32,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:02:32,469 INFO L87 Difference]: Start difference. First operand 14301 states and 23755 transitions. Second operand has 8 states, 8 states have (on average 16.375) internal successors, (131), 7 states have internal predecessors, (131), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) [2023-11-06 22:02:35,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:02:35,619 INFO L93 Difference]: Finished difference Result 58601 states and 96898 transitions. [2023-11-06 22:02:35,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 22:02:35,621 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 16.375) internal successors, (131), 7 states have internal predecessors, (131), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) Word has length 438 [2023-11-06 22:02:35,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:02:35,740 INFO L225 Difference]: With dead ends: 58601 [2023-11-06 22:02:35,741 INFO L226 Difference]: Without dead ends: 45325 [2023-11-06 22:02:35,762 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 444 GetRequests, 431 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2023-11-06 22:02:35,763 INFO L413 NwaCegarLoop]: 727 mSDtfsCounter, 2270 mSDsluCounter, 3533 mSDsCounter, 0 mSdLazyCounter, 985 mSolverCounterSat, 745 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2270 SdHoareTripleChecker+Valid, 4260 SdHoareTripleChecker+Invalid, 1730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 745 IncrementalHoareTripleChecker+Valid, 985 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-11-06 22:02:35,763 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2270 Valid, 4260 Invalid, 1730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [745 Valid, 985 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-11-06 22:02:35,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45325 states. [2023-11-06 22:02:36,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45325 to 42211. [2023-11-06 22:02:37,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42211 states, 41080 states have (on average 1.6509737098344692) internal successors, (67822), 41110 states have internal predecessors, (67822), 1022 states have call successors, (1022), 108 states have call predecessors, (1022), 108 states have return successors, (1022), 992 states have call predecessors, (1022), 1022 states have call successors, (1022) [2023-11-06 22:02:37,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42211 states to 42211 states and 69866 transitions. [2023-11-06 22:02:37,127 INFO L78 Accepts]: Start accepts. Automaton has 42211 states and 69866 transitions. Word has length 438 [2023-11-06 22:02:37,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:02:37,129 INFO L495 AbstractCegarLoop]: Abstraction has 42211 states and 69866 transitions. [2023-11-06 22:02:37,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.375) internal successors, (131), 7 states have internal predecessors, (131), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) [2023-11-06 22:02:37,130 INFO L276 IsEmpty]: Start isEmpty. Operand 42211 states and 69866 transitions. [2023-11-06 22:02:37,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2023-11-06 22:02:37,146 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:02:37,147 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:02:37,159 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-06 22:02:37,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:02:37,357 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:02:37,358 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:02:37,358 INFO L85 PathProgramCache]: Analyzing trace with hash 919601463, now seen corresponding path program 1 times [2023-11-06 22:02:37,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:02:37,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445555851] [2023-11-06 22:02:37,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:02:37,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:02:37,617 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:02:37,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [45875017] [2023-11-06 22:02:37,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:02:37,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:02:37,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:02:37,627 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:02:37,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-06 22:02:38,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:02:38,335 INFO L262 TraceCheckSpWp]: Trace formula consists of 1182 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:02:38,346 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:02:39,056 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7564 trivial. 0 not checked. [2023-11-06 22:02:39,056 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:02:39,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:02:39,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445555851] [2023-11-06 22:02:39,057 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:02:39,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45875017] [2023-11-06 22:02:39,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45875017] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:02:39,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:02:39,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-06 22:02:39,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78613360] [2023-11-06 22:02:39,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:02:39,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-06 22:02:39,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:02:39,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-06 22:02:39,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-11-06 22:02:39,061 INFO L87 Difference]: Start difference. First operand 42211 states and 69866 transitions. Second operand has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 8 states have internal predecessors, (131), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) [2023-11-06 22:02:43,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:02:43,977 INFO L93 Difference]: Finished difference Result 213093 states and 351486 transitions. [2023-11-06 22:02:43,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 22:02:43,977 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 8 states have internal predecessors, (131), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) Word has length 438 [2023-11-06 22:02:43,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:02:44,452 INFO L225 Difference]: With dead ends: 213093 [2023-11-06 22:02:44,453 INFO L226 Difference]: Without dead ends: 172115 [2023-11-06 22:02:44,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 444 GetRequests, 430 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2023-11-06 22:02:44,500 INFO L413 NwaCegarLoop]: 1119 mSDtfsCounter, 3400 mSDsluCounter, 4202 mSDsCounter, 0 mSdLazyCounter, 1078 mSolverCounterSat, 1098 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3400 SdHoareTripleChecker+Valid, 5321 SdHoareTripleChecker+Invalid, 2176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1098 IncrementalHoareTripleChecker+Valid, 1078 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-11-06 22:02:44,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3400 Valid, 5321 Invalid, 2176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1098 Valid, 1078 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-11-06 22:02:44,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172115 states. [2023-11-06 22:02:47,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172115 to 83893. [2023-11-06 22:02:47,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83893 states, 81824 states have (on average 1.6289841611263198) internal successors, (133290), 81896 states have internal predecessors, (133290), 1838 states have call successors, (1838), 230 states have call predecessors, (1838), 230 states have return successors, (1838), 1766 states have call predecessors, (1838), 1838 states have call successors, (1838) [2023-11-06 22:02:48,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83893 states to 83893 states and 136966 transitions. [2023-11-06 22:02:48,510 INFO L78 Accepts]: Start accepts. Automaton has 83893 states and 136966 transitions. Word has length 438 [2023-11-06 22:02:48,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:02:48,512 INFO L495 AbstractCegarLoop]: Abstraction has 83893 states and 136966 transitions. [2023-11-06 22:02:48,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 8 states have internal predecessors, (131), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) [2023-11-06 22:02:48,513 INFO L276 IsEmpty]: Start isEmpty. Operand 83893 states and 136966 transitions. [2023-11-06 22:02:48,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2023-11-06 22:02:48,549 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:02:48,550 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:02:48,565 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-06 22:02:48,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:02:48,761 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:02:48,761 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:02:48,761 INFO L85 PathProgramCache]: Analyzing trace with hash -1466908043, now seen corresponding path program 1 times [2023-11-06 22:02:48,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:02:48,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898172174] [2023-11-06 22:02:48,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:02:48,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:02:48,859 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:02:48,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1251511654] [2023-11-06 22:02:48,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:02:48,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:02:48,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:02:48,861 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:02:48,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-06 22:02:49,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:02:49,584 INFO L262 TraceCheckSpWp]: Trace formula consists of 1181 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-06 22:02:49,597 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:02:50,672 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7564 trivial. 0 not checked. [2023-11-06 22:02:50,673 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:02:50,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:02:50,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898172174] [2023-11-06 22:02:50,673 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:02:50,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251511654] [2023-11-06 22:02:50,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251511654] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:02:50,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:02:50,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-06 22:02:50,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507198699] [2023-11-06 22:02:50,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:02:50,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-06 22:02:50,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:02:50,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-06 22:02:50,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-11-06 22:02:50,678 INFO L87 Difference]: Start difference. First operand 83893 states and 136966 transitions. Second operand has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 8 states have internal predecessors, (131), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) [2023-11-06 22:02:55,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:02:55,535 INFO L93 Difference]: Finished difference Result 203773 states and 332357 transitions. [2023-11-06 22:02:55,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 22:02:55,536 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 8 states have internal predecessors, (131), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) Word has length 438 [2023-11-06 22:02:55,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:02:55,908 INFO L225 Difference]: With dead ends: 203773 [2023-11-06 22:02:55,908 INFO L226 Difference]: Without dead ends: 126931 [2023-11-06 22:02:55,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 444 GetRequests, 430 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2023-11-06 22:02:55,958 INFO L413 NwaCegarLoop]: 940 mSDtfsCounter, 2360 mSDsluCounter, 3394 mSDsCounter, 0 mSdLazyCounter, 1037 mSolverCounterSat, 540 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2360 SdHoareTripleChecker+Valid, 4334 SdHoareTripleChecker+Invalid, 1577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 540 IncrementalHoareTripleChecker+Valid, 1037 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-06 22:02:55,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2360 Valid, 4334 Invalid, 1577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [540 Valid, 1037 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-06 22:02:56,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126931 states. [2023-11-06 22:02:59,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126931 to 105323. [2023-11-06 22:02:59,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105323 states, 102621 states have (on average 1.624589508969899) internal successors, (166717), 102725 states have internal predecessors, (166717), 2382 states have call successors, (2382), 319 states have call predecessors, (2382), 319 states have return successors, (2382), 2278 states have call predecessors, (2382), 2382 states have call successors, (2382) [2023-11-06 22:02:59,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105323 states to 105323 states and 171481 transitions. [2023-11-06 22:02:59,440 INFO L78 Accepts]: Start accepts. Automaton has 105323 states and 171481 transitions. Word has length 438 [2023-11-06 22:02:59,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:02:59,441 INFO L495 AbstractCegarLoop]: Abstraction has 105323 states and 171481 transitions. [2023-11-06 22:02:59,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 8 states have internal predecessors, (131), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) [2023-11-06 22:02:59,442 INFO L276 IsEmpty]: Start isEmpty. Operand 105323 states and 171481 transitions. [2023-11-06 22:02:59,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2023-11-06 22:02:59,483 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:02:59,484 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:02:59,496 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-06 22:02:59,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:02:59,694 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:02:59,694 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:02:59,695 INFO L85 PathProgramCache]: Analyzing trace with hash -625289613, now seen corresponding path program 1 times [2023-11-06 22:02:59,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:02:59,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261872230] [2023-11-06 22:02:59,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:02:59,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:02:59,784 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:02:59,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1715749227] [2023-11-06 22:02:59,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:02:59,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:02:59,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:02:59,787 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:02:59,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-06 22:03:00,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:03:00,538 INFO L262 TraceCheckSpWp]: Trace formula consists of 1182 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 22:03:00,552 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:03:01,193 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7564 trivial. 0 not checked. [2023-11-06 22:03:01,194 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:03:01,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:03:01,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261872230] [2023-11-06 22:03:01,195 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:03:01,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715749227] [2023-11-06 22:03:01,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715749227] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:03:01,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:03:01,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:03:01,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415699188] [2023-11-06 22:03:01,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:03:01,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:03:01,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:03:01,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:03:01,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:03:01,199 INFO L87 Difference]: Start difference. First operand 105323 states and 171481 transitions. Second operand has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 5 states have internal predecessors, (131), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) [2023-11-06 22:03:04,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:03:04,351 INFO L93 Difference]: Finished difference Result 227333 states and 370468 transitions. [2023-11-06 22:03:04,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 22:03:04,352 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 5 states have internal predecessors, (131), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) Word has length 438 [2023-11-06 22:03:04,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:03:04,902 INFO L225 Difference]: With dead ends: 227333 [2023-11-06 22:03:04,902 INFO L226 Difference]: Without dead ends: 133547 [2023-11-06 22:03:04,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 433 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:03:04,980 INFO L413 NwaCegarLoop]: 823 mSDtfsCounter, 1222 mSDsluCounter, 2048 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1222 SdHoareTripleChecker+Valid, 2871 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:03:04,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1222 Valid, 2871 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-06 22:03:05,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133547 states. [2023-11-06 22:03:08,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133547 to 91387. [2023-11-06 22:03:08,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91387 states, 88652 states have (on average 1.6198168118034562) internal successors, (143600), 88738 states have internal predecessors, (143600), 2410 states have call successors, (2410), 324 states have call predecessors, (2410), 324 states have return successors, (2410), 2324 states have call predecessors, (2410), 2410 states have call successors, (2410) [2023-11-06 22:03:08,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91387 states to 91387 states and 148420 transitions. [2023-11-06 22:03:08,270 INFO L78 Accepts]: Start accepts. Automaton has 91387 states and 148420 transitions. Word has length 438 [2023-11-06 22:03:08,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:03:08,271 INFO L495 AbstractCegarLoop]: Abstraction has 91387 states and 148420 transitions. [2023-11-06 22:03:08,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 5 states have internal predecessors, (131), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) [2023-11-06 22:03:08,271 INFO L276 IsEmpty]: Start isEmpty. Operand 91387 states and 148420 transitions. [2023-11-06 22:03:08,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 440 [2023-11-06 22:03:08,293 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:03:08,294 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:03:08,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-06 22:03:08,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:03:08,495 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:03:08,495 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:03:08,495 INFO L85 PathProgramCache]: Analyzing trace with hash -299430370, now seen corresponding path program 1 times [2023-11-06 22:03:08,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:03:08,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934241844] [2023-11-06 22:03:08,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:03:08,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:03:08,569 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:03:08,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [490361263] [2023-11-06 22:03:08,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:03:08,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:03:08,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:03:08,571 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:03:08,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-06 22:03:09,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:03:09,315 INFO L262 TraceCheckSpWp]: Trace formula consists of 1183 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 22:03:09,323 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:03:09,374 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7564 trivial. 0 not checked. [2023-11-06 22:03:09,374 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:03:09,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:03:09,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934241844] [2023-11-06 22:03:09,375 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:03:09,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490361263] [2023-11-06 22:03:09,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490361263] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:03:09,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:03:09,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:03:09,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376773181] [2023-11-06 22:03:09,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:03:09,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:03:09,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:03:09,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:03:09,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:03:09,380 INFO L87 Difference]: Start difference. First operand 91387 states and 148420 transitions. Second operand has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) [2023-11-06 22:03:11,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:03:11,933 INFO L93 Difference]: Finished difference Result 181059 states and 294679 transitions. [2023-11-06 22:03:11,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:03:11,934 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) Word has length 439 [2023-11-06 22:03:11,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:03:12,080 INFO L225 Difference]: With dead ends: 181059 [2023-11-06 22:03:12,080 INFO L226 Difference]: Without dead ends: 98383 [2023-11-06 22:03:12,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 439 GetRequests, 436 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:03:12,136 INFO L413 NwaCegarLoop]: 474 mSDtfsCounter, 426 mSDsluCounter, 893 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 426 SdHoareTripleChecker+Valid, 1367 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:03:12,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [426 Valid, 1367 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:03:12,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98383 states. [2023-11-06 22:03:14,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98383 to 91387. [2023-11-06 22:03:14,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91387 states, 88652 states have (on average 1.6179217614943826) internal successors, (143432), 88738 states have internal predecessors, (143432), 2410 states have call successors, (2410), 324 states have call predecessors, (2410), 324 states have return successors, (2410), 2324 states have call predecessors, (2410), 2410 states have call successors, (2410) [2023-11-06 22:03:15,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91387 states to 91387 states and 148252 transitions. [2023-11-06 22:03:15,153 INFO L78 Accepts]: Start accepts. Automaton has 91387 states and 148252 transitions. Word has length 439 [2023-11-06 22:03:15,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:03:15,154 INFO L495 AbstractCegarLoop]: Abstraction has 91387 states and 148252 transitions. [2023-11-06 22:03:15,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) [2023-11-06 22:03:15,155 INFO L276 IsEmpty]: Start isEmpty. Operand 91387 states and 148252 transitions. [2023-11-06 22:03:15,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 440 [2023-11-06 22:03:15,186 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:03:15,186 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:03:15,200 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-06 22:03:15,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:03:15,401 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:03:15,401 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:03:15,401 INFO L85 PathProgramCache]: Analyzing trace with hash 261269408, now seen corresponding path program 1 times [2023-11-06 22:03:15,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:03:15,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331881324] [2023-11-06 22:03:15,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:03:15,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:03:15,485 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:03:15,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2046644027] [2023-11-06 22:03:15,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:03:15,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:03:15,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:03:15,488 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:03:15,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-06 22:03:16,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:03:16,255 INFO L262 TraceCheckSpWp]: Trace formula consists of 1180 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:03:16,286 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:03:16,954 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 1191 proven. 168 refuted. 0 times theorem prover too weak. 6205 trivial. 0 not checked. [2023-11-06 22:03:16,955 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:03:17,436 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 15 proven. 168 refuted. 0 times theorem prover too weak. 7381 trivial. 0 not checked. [2023-11-06 22:03:17,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:03:17,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331881324] [2023-11-06 22:03:17,437 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:03:17,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046644027] [2023-11-06 22:03:17,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046644027] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:03:17,437 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:03:17,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-06 22:03:17,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932895112] [2023-11-06 22:03:17,438 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:03:17,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:03:17,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:03:17,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:03:17,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:03:17,442 INFO L87 Difference]: Start difference. First operand 91387 states and 148252 transitions. Second operand has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 2 states have call successors, (118), 2 states have call predecessors, (118), 4 states have return successors, (119), 2 states have call predecessors, (119), 2 states have call successors, (119) [2023-11-06 22:03:19,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:03:19,680 INFO L93 Difference]: Finished difference Result 125499 states and 203455 transitions. [2023-11-06 22:03:19,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:03:19,681 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 2 states have call successors, (118), 2 states have call predecessors, (118), 4 states have return successors, (119), 2 states have call predecessors, (119), 2 states have call successors, (119) Word has length 439 [2023-11-06 22:03:19,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:03:19,729 INFO L225 Difference]: With dead ends: 125499 [2023-11-06 22:03:19,729 INFO L226 Difference]: Without dead ends: 39598 [2023-11-06 22:03:19,761 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 880 GetRequests, 870 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-06 22:03:19,762 INFO L413 NwaCegarLoop]: 355 mSDtfsCounter, 484 mSDsluCounter, 571 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 489 SdHoareTripleChecker+Valid, 926 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-06 22:03:19,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [489 Valid, 926 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-06 22:03:19,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39598 states. [2023-11-06 22:03:21,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39598 to 39318. [2023-11-06 22:03:21,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39318 states, 37276 states have (on average 1.5878849661980898) internal successors, (59190), 37306 states have internal predecessors, (59190), 1794 states have call successors, (1794), 247 states have call predecessors, (1794), 247 states have return successors, (1794), 1764 states have call predecessors, (1794), 1794 states have call successors, (1794) [2023-11-06 22:03:21,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39318 states to 39318 states and 62778 transitions. [2023-11-06 22:03:21,449 INFO L78 Accepts]: Start accepts. Automaton has 39318 states and 62778 transitions. Word has length 439 [2023-11-06 22:03:21,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:03:21,450 INFO L495 AbstractCegarLoop]: Abstraction has 39318 states and 62778 transitions. [2023-11-06 22:03:21,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 2 states have call successors, (118), 2 states have call predecessors, (118), 4 states have return successors, (119), 2 states have call predecessors, (119), 2 states have call successors, (119) [2023-11-06 22:03:21,451 INFO L276 IsEmpty]: Start isEmpty. Operand 39318 states and 62778 transitions. [2023-11-06 22:03:21,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 440 [2023-11-06 22:03:21,462 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:03:21,462 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:03:21,470 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-06 22:03:21,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:03:21,663 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:03:21,664 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:03:21,664 INFO L85 PathProgramCache]: Analyzing trace with hash 325151545, now seen corresponding path program 1 times [2023-11-06 22:03:21,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:03:21,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609635037] [2023-11-06 22:03:21,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:03:21,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:03:21,752 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:03:21,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1188944169] [2023-11-06 22:03:21,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:03:21,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:03:21,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:03:21,755 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:03:21,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5415246-1b7b-419d-803c-0ee1014f7547/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-06 22:03:22,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:03:22,545 INFO L262 TraceCheckSpWp]: Trace formula consists of 1183 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 22:03:22,556 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:03:23,204 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 61 proven. 183 refuted. 0 times theorem prover too weak. 7320 trivial. 0 not checked. [2023-11-06 22:03:23,204 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:03:23,531 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7564 trivial. 0 not checked. [2023-11-06 22:03:23,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:03:23,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609635037] [2023-11-06 22:03:23,532 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:03:23,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188944169] [2023-11-06 22:03:23,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188944169] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:03:23,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:03:23,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-06 22:03:23,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268134319] [2023-11-06 22:03:23,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:03:23,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:03:23,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:03:23,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:03:23,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:03:23,537 INFO L87 Difference]: Start difference. First operand 39318 states and 62778 transitions. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) [2023-11-06 22:03:25,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:03:25,384 INFO L93 Difference]: Finished difference Result 77530 states and 123876 transitions. [2023-11-06 22:03:25,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:03:25,385 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 1 states have call successors, (62), 1 states have call predecessors, (62), 1 states have return successors, (62), 1 states have call predecessors, (62), 1 states have call successors, (62) Word has length 439 [2023-11-06 22:03:25,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:03:25,454 INFO L225 Difference]: With dead ends: 77530 [2023-11-06 22:03:25,454 INFO L226 Difference]: Without dead ends: 39318 [2023-11-06 22:03:25,492 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 876 GetRequests, 871 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:03:25,493 INFO L413 NwaCegarLoop]: 407 mSDtfsCounter, 103 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 704 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:03:25,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 704 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 22:03:25,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39318 states.