./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-28.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf2fff3-da65-4268-b4cd-db1d63dc6d21/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf2fff3-da65-4268-b4cd-db1d63dc6d21/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf2fff3-da65-4268-b4cd-db1d63dc6d21/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf2fff3-da65-4268-b4cd-db1d63dc6d21/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-28.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf2fff3-da65-4268-b4cd-db1d63dc6d21/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf2fff3-da65-4268-b4cd-db1d63dc6d21/bin/uautomizer-verify-uTZkv6EMXl --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 458a3abf556bd9bffc0532b3c98efa5ab89d05f5a4e80738a42f6147ca1f834c --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:20:59,869 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:21:00,000 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf2fff3-da65-4268-b4cd-db1d63dc6d21/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-12 02:21:00,008 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:21:00,009 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:21:00,050 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:21:00,050 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:21:00,051 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:21:00,052 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:21:00,057 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:21:00,059 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:21:00,059 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:21:00,060 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:21:00,062 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:21:00,062 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:21:00,062 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:21:00,063 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:21:00,063 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:21:00,064 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:21:00,064 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:21:00,064 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:21:00,065 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:21:00,065 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:21:00,067 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:21:00,068 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:21:00,069 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:21:00,069 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:21:00,070 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:21:00,070 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:21:00,071 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:21:00,072 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:21:00,072 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:21:00,072 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:21:00,073 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:21:00,073 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:21:00,073 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:21:00,073 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:21:00,074 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:21:00,074 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:21:00,074 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_8bf2fff3-da65-4268-b4cd-db1d63dc6d21/bin/uautomizer-verify-uTZkv6EMXl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf2fff3-da65-4268-b4cd-db1d63dc6d21/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 458a3abf556bd9bffc0532b3c98efa5ab89d05f5a4e80738a42f6147ca1f834c [2023-11-12 02:21:00,394 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:21:00,417 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:21:00,420 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:21:00,421 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:21:00,422 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:21:00,423 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf2fff3-da65-4268-b4cd-db1d63dc6d21/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-28.i [2023-11-12 02:21:03,399 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:21:03,784 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:21:03,786 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf2fff3-da65-4268-b4cd-db1d63dc6d21/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-28.i [2023-11-12 02:21:03,803 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf2fff3-da65-4268-b4cd-db1d63dc6d21/bin/uautomizer-verify-uTZkv6EMXl/data/cf6a49525/e02a4346a7f0425aa69256c38b8eea7a/FLAGafd858cda [2023-11-12 02:21:03,824 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf2fff3-da65-4268-b4cd-db1d63dc6d21/bin/uautomizer-verify-uTZkv6EMXl/data/cf6a49525/e02a4346a7f0425aa69256c38b8eea7a [2023-11-12 02:21:03,833 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:21:03,835 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:21:03,836 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:21:03,836 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:21:03,842 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:21:03,843 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:21:03" (1/1) ... [2023-11-12 02:21:03,844 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7dfdc065 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:03, skipping insertion in model container [2023-11-12 02:21:03,844 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:21:03" (1/1) ... [2023-11-12 02:21:03,905 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:21:04,052 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_8bf2fff3-da65-4268-b4cd-db1d63dc6d21/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-28.i[916,929] [2023-11-12 02:21:04,217 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:21:04,254 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:21:04,270 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_8bf2fff3-da65-4268-b4cd-db1d63dc6d21/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-28.i[916,929] [2023-11-12 02:21:04,422 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:21:04,445 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:21:04,446 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:04 WrapperNode [2023-11-12 02:21:04,446 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:21:04,447 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:21:04,447 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:21:04,447 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:21:04,454 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:04" (1/1) ... [2023-11-12 02:21:04,476 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:04" (1/1) ... [2023-11-12 02:21:04,560 INFO L138 Inliner]: procedures = 26, calls = 114, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 636 [2023-11-12 02:21:04,561 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:21:04,562 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:21:04,562 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:21:04,562 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:21:04,571 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:04" (1/1) ... [2023-11-12 02:21:04,572 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:04" (1/1) ... [2023-11-12 02:21:04,581 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:04" (1/1) ... [2023-11-12 02:21:04,582 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:04" (1/1) ... [2023-11-12 02:21:04,619 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:04" (1/1) ... [2023-11-12 02:21:04,627 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:04" (1/1) ... [2023-11-12 02:21:04,638 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:04" (1/1) ... [2023-11-12 02:21:04,644 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:04" (1/1) ... [2023-11-12 02:21:04,664 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:21:04,666 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:21:04,666 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:21:04,666 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:21:04,667 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:04" (1/1) ... [2023-11-12 02:21:04,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:21:04,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf2fff3-da65-4268-b4cd-db1d63dc6d21/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:21:04,707 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf2fff3-da65-4268-b4cd-db1d63dc6d21/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:21:04,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf2fff3-da65-4268-b4cd-db1d63dc6d21/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:21:04,766 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:21:04,766 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-12 02:21:04,766 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-12 02:21:04,767 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:21:04,767 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:21:04,767 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:21:04,952 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:21:04,955 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:21:05,917 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:21:05,929 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:21:05,929 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-12 02:21:05,932 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:21:05 BoogieIcfgContainer [2023-11-12 02:21:05,932 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:21:05,935 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:21:05,935 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:21:05,938 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:21:05,939 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:21:03" (1/3) ... [2023-11-12 02:21:05,939 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1356b182 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:21:05, skipping insertion in model container [2023-11-12 02:21:05,940 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:21:04" (2/3) ... [2023-11-12 02:21:05,940 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1356b182 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:21:05, skipping insertion in model container [2023-11-12 02:21:05,940 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:21:05" (3/3) ... [2023-11-12 02:21:05,942 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodesize_ps-cn-250_file-28.i [2023-11-12 02:21:05,963 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:21:05,963 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 02:21:06,024 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:21:06,031 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5781d8d2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:21:06,031 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 02:21:06,037 INFO L276 IsEmpty]: Start isEmpty. Operand has 264 states, 160 states have (on average 1.50625) internal successors, (241), 161 states have internal predecessors, (241), 101 states have call successors, (101), 1 states have call predecessors, (101), 1 states have return successors, (101), 101 states have call predecessors, (101), 101 states have call successors, (101) [2023-11-12 02:21:06,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 615 [2023-11-12 02:21:06,075 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:21:06,076 INFO L195 NwaCegarLoop]: trace histogram [101, 101, 101, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:21:06,077 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:21:06,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:21:06,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1393568928, now seen corresponding path program 1 times [2023-11-12 02:21:06,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:21:06,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258556287] [2023-11-12 02:21:06,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:06,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:21:06,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:06,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:21:06,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258556287] [2023-11-12 02:21:06,711 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-12 02:21:06,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125117430] [2023-11-12 02:21:06,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:06,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:21:06,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf2fff3-da65-4268-b4cd-db1d63dc6d21/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:21:06,726 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf2fff3-da65-4268-b4cd-db1d63dc6d21/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:21:06,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf2fff3-da65-4268-b4cd-db1d63dc6d21/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:21:07,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:07,240 INFO L262 TraceCheckSpWp]: Trace formula consists of 1401 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-12 02:21:07,285 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:21:07,463 INFO L134 CoverageAnalysis]: Checked inductivity of 20200 backedges. 200 proven. 0 refuted. 0 times theorem prover too weak. 20000 trivial. 0 not checked. [2023-11-12 02:21:07,463 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:21:07,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125117430] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:21:07,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:21:07,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:21:07,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044529240] [2023-11-12 02:21:07,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:21:07,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-12 02:21:07,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:21:07,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-12 02:21:07,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 02:21:07,525 INFO L87 Difference]: Start difference. First operand has 264 states, 160 states have (on average 1.50625) internal successors, (241), 161 states have internal predecessors, (241), 101 states have call successors, (101), 1 states have call predecessors, (101), 1 states have return successors, (101), 101 states have call predecessors, (101), 101 states have call successors, (101) Second operand has 2 states, 2 states have (on average 57.0) internal successors, (114), 2 states have internal predecessors, (114), 2 states have call successors, (101), 2 states have call predecessors, (101), 1 states have return successors, (101), 1 states have call predecessors, (101), 2 states have call successors, (101) [2023-11-12 02:21:07,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:21:07,647 INFO L93 Difference]: Finished difference Result 521 states and 981 transitions. [2023-11-12 02:21:07,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-12 02:21:07,653 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 57.0) internal successors, (114), 2 states have internal predecessors, (114), 2 states have call successors, (101), 2 states have call predecessors, (101), 1 states have return successors, (101), 1 states have call predecessors, (101), 2 states have call successors, (101) Word has length 614 [2023-11-12 02:21:07,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:21:07,675 INFO L225 Difference]: With dead ends: 521 [2023-11-12 02:21:07,676 INFO L226 Difference]: Without dead ends: 260 [2023-11-12 02:21:07,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 613 GetRequests, 613 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 02:21:07,686 INFO L413 NwaCegarLoop]: 436 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, 436 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 [2023-11-12 02:21:07,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 436 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:21:07,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2023-11-12 02:21:07,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 260. [2023-11-12 02:21:07,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 157 states have (on average 1.4904458598726114) internal successors, (234), 157 states have internal predecessors, (234), 101 states have call successors, (101), 1 states have call predecessors, (101), 1 states have return successors, (101), 101 states have call predecessors, (101), 101 states have call successors, (101) [2023-11-12 02:21:07,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 436 transitions. [2023-11-12 02:21:07,792 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 436 transitions. Word has length 614 [2023-11-12 02:21:07,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:21:07,793 INFO L495 AbstractCegarLoop]: Abstraction has 260 states and 436 transitions. [2023-11-12 02:21:07,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 57.0) internal successors, (114), 2 states have internal predecessors, (114), 2 states have call successors, (101), 2 states have call predecessors, (101), 1 states have return successors, (101), 1 states have call predecessors, (101), 2 states have call successors, (101) [2023-11-12 02:21:07,794 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 436 transitions. [2023-11-12 02:21:07,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 615 [2023-11-12 02:21:07,816 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:21:07,816 INFO L195 NwaCegarLoop]: trace histogram [101, 101, 101, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:21:07,830 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf2fff3-da65-4268-b4cd-db1d63dc6d21/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 02:21:08,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf2fff3-da65-4268-b4cd-db1d63dc6d21/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-12 02:21:08,018 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:21:08,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:21:08,019 INFO L85 PathProgramCache]: Analyzing trace with hash -781539614, now seen corresponding path program 1 times [2023-11-12 02:21:08,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:21:08,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786071263] [2023-11-12 02:21:08,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:08,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:21:08,267 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:21:08,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1762965752] [2023-11-12 02:21:08,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:08,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:21:08,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf2fff3-da65-4268-b4cd-db1d63dc6d21/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:21:08,283 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf2fff3-da65-4268-b4cd-db1d63dc6d21/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:21:08,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf2fff3-da65-4268-b4cd-db1d63dc6d21/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:21:08,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:08,743 INFO L262 TraceCheckSpWp]: Trace formula consists of 1401 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 02:21:08,762 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:21:08,887 INFO L134 CoverageAnalysis]: Checked inductivity of 20200 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20200 trivial. 0 not checked. [2023-11-12 02:21:08,887 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:21:08,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:21:08,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786071263] [2023-11-12 02:21:08,888 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:21:08,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762965752] [2023-11-12 02:21:08,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762965752] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:21:08,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:21:08,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:21:08,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491539834] [2023-11-12 02:21:08,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:21:08,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:21:08,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:21:08,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:21:08,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:21:08,895 INFO L87 Difference]: Start difference. First operand 260 states and 436 transitions. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 1 states have call successors, (101), 1 states have call predecessors, (101), 1 states have return successors, (101), 1 states have call predecessors, (101), 1 states have call successors, (101) [2023-11-12 02:21:08,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:21:08,993 INFO L93 Difference]: Finished difference Result 691 states and 1153 transitions. [2023-11-12 02:21:08,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:21:08,994 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 1 states have call successors, (101), 1 states have call predecessors, (101), 1 states have return successors, (101), 1 states have call predecessors, (101), 1 states have call successors, (101) Word has length 614 [2023-11-12 02:21:08,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:21:09,003 INFO L225 Difference]: With dead ends: 691 [2023-11-12 02:21:09,004 INFO L226 Difference]: Without dead ends: 434 [2023-11-12 02:21:09,005 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 613 GetRequests, 612 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:21:09,007 INFO L413 NwaCegarLoop]: 434 mSDtfsCounter, 279 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 857 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:21:09,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [279 Valid, 857 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:21:09,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2023-11-12 02:21:09,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 431. [2023-11-12 02:21:09,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 251 states have (on average 1.4462151394422311) internal successors, (363), 252 states have internal predecessors, (363), 177 states have call successors, (177), 2 states have call predecessors, (177), 2 states have return successors, (177), 176 states have call predecessors, (177), 177 states have call successors, (177) [2023-11-12 02:21:09,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 717 transitions. [2023-11-12 02:21:09,137 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 717 transitions. Word has length 614 [2023-11-12 02:21:09,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:21:09,143 INFO L495 AbstractCegarLoop]: Abstraction has 431 states and 717 transitions. [2023-11-12 02:21:09,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 1 states have call successors, (101), 1 states have call predecessors, (101), 1 states have return successors, (101), 1 states have call predecessors, (101), 1 states have call successors, (101) [2023-11-12 02:21:09,145 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 717 transitions. [2023-11-12 02:21:09,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 615 [2023-11-12 02:21:09,166 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:21:09,167 INFO L195 NwaCegarLoop]: trace histogram [101, 101, 101, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:21:09,175 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf2fff3-da65-4268-b4cd-db1d63dc6d21/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 02:21:09,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf2fff3-da65-4268-b4cd-db1d63dc6d21/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:21:09,375 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:21:09,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:21:09,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1707989348, now seen corresponding path program 1 times [2023-11-12 02:21:09,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:21:09,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879708489] [2023-11-12 02:21:09,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:09,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:21:09,542 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:21:09,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [262464012] [2023-11-12 02:21:09,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:09,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:21:09,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf2fff3-da65-4268-b4cd-db1d63dc6d21/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:21:09,549 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf2fff3-da65-4268-b4cd-db1d63dc6d21/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:21:09,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf2fff3-da65-4268-b4cd-db1d63dc6d21/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 02:21:09,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:09,990 INFO L262 TraceCheckSpWp]: Trace formula consists of 1400 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:21:10,003 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:21:10,334 INFO L134 CoverageAnalysis]: Checked inductivity of 20200 backedges. 7548 proven. 72 refuted. 0 times theorem prover too weak. 12580 trivial. 0 not checked. [2023-11-12 02:21:10,334 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:21:10,819 INFO L134 CoverageAnalysis]: Checked inductivity of 20200 backedges. 228 proven. 72 refuted. 0 times theorem prover too weak. 19900 trivial. 0 not checked. [2023-11-12 02:21:10,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:21:10,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879708489] [2023-11-12 02:21:10,820 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:21:10,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262464012] [2023-11-12 02:21:10,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262464012] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:21:10,821 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:21:10,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-12 02:21:10,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595084588] [2023-11-12 02:21:10,822 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:21:10,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:21:10,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:21:10,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:21:10,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:21:10,827 INFO L87 Difference]: Start difference. First operand 431 states and 717 transitions. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 2 states have call successors, (125), 2 states have call predecessors, (125), 4 states have return successors, (126), 2 states have call predecessors, (126), 2 states have call successors, (126) [2023-11-12 02:21:12,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:21:12,043 INFO L93 Difference]: Finished difference Result 820 states and 1356 transitions. [2023-11-12 02:21:12,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 02:21:12,049 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 2 states have call successors, (125), 2 states have call predecessors, (125), 4 states have return successors, (126), 2 states have call predecessors, (126), 2 states have call successors, (126) Word has length 614 [2023-11-12 02:21:12,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:21:12,065 INFO L225 Difference]: With dead ends: 820 [2023-11-12 02:21:12,065 INFO L226 Difference]: Without dead ends: 392 [2023-11-12 02:21:12,067 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1230 GetRequests, 1220 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-12 02:21:12,071 INFO L413 NwaCegarLoop]: 448 mSDtfsCounter, 464 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 879 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 540 SdHoareTripleChecker+Valid, 997 SdHoareTripleChecker+Invalid, 1051 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 879 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:21:12,077 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [540 Valid, 997 Invalid, 1051 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 879 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-12 02:21:12,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2023-11-12 02:21:12,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 387. [2023-11-12 02:21:12,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 206 states have (on average 1.3640776699029127) internal successors, (281), 207 states have internal predecessors, (281), 177 states have call successors, (177), 3 states have call predecessors, (177), 3 states have return successors, (177), 176 states have call predecessors, (177), 177 states have call successors, (177) [2023-11-12 02:21:12,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 635 transitions. [2023-11-12 02:21:12,164 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 635 transitions. Word has length 614 [2023-11-12 02:21:12,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:21:12,167 INFO L495 AbstractCegarLoop]: Abstraction has 387 states and 635 transitions. [2023-11-12 02:21:12,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 2 states have call successors, (125), 2 states have call predecessors, (125), 4 states have return successors, (126), 2 states have call predecessors, (126), 2 states have call successors, (126) [2023-11-12 02:21:12,168 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 635 transitions. [2023-11-12 02:21:12,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 616 [2023-11-12 02:21:12,174 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:21:12,174 INFO L195 NwaCegarLoop]: trace histogram [101, 101, 101, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:21:12,189 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf2fff3-da65-4268-b4cd-db1d63dc6d21/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 02:21:12,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf2fff3-da65-4268-b4cd-db1d63dc6d21/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:21:12,390 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:21:12,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:21:12,391 INFO L85 PathProgramCache]: Analyzing trace with hash -240808003, now seen corresponding path program 1 times [2023-11-12 02:21:12,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:21:12,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274772884] [2023-11-12 02:21:12,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:12,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:21:12,516 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:21:12,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1760805413] [2023-11-12 02:21:12,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:12,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:21:12,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf2fff3-da65-4268-b4cd-db1d63dc6d21/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:21:12,519 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf2fff3-da65-4268-b4cd-db1d63dc6d21/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:21:12,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf2fff3-da65-4268-b4cd-db1d63dc6d21/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 02:21:12,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:12,998 INFO L262 TraceCheckSpWp]: Trace formula consists of 1403 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 02:21:13,017 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:21:13,509 INFO L134 CoverageAnalysis]: Checked inductivity of 20200 backedges. 10090 proven. 165 refuted. 0 times theorem prover too weak. 9945 trivial. 0 not checked. [2023-11-12 02:21:13,509 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:21:13,972 INFO L134 CoverageAnalysis]: Checked inductivity of 20200 backedges. 135 proven. 165 refuted. 0 times theorem prover too weak. 19900 trivial. 0 not checked. [2023-11-12 02:21:13,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:21:13,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274772884] [2023-11-12 02:21:13,973 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:21:13,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760805413] [2023-11-12 02:21:13,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760805413] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:21:13,974 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:21:13,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-11-12 02:21:13,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063070090] [2023-11-12 02:21:13,975 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:21:13,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-12 02:21:13,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:21:13,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-12 02:21:13,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-12 02:21:13,979 INFO L87 Difference]: Start difference. First operand 387 states and 635 transitions. Second operand has 10 states, 10 states have (on average 15.9) internal successors, (159), 10 states have internal predecessors, (159), 3 states have call successors, (156), 2 states have call predecessors, (156), 4 states have return successors, (157), 3 states have call predecessors, (157), 3 states have call successors, (157) [2023-11-12 02:21:14,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:21:14,799 INFO L93 Difference]: Finished difference Result 661 states and 1081 transitions. [2023-11-12 02:21:14,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 02:21:14,801 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 15.9) internal successors, (159), 10 states have internal predecessors, (159), 3 states have call successors, (156), 2 states have call predecessors, (156), 4 states have return successors, (157), 3 states have call predecessors, (157), 3 states have call successors, (157) Word has length 615 [2023-11-12 02:21:14,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:21:14,807 INFO L225 Difference]: With dead ends: 661 [2023-11-12 02:21:14,808 INFO L226 Difference]: Without dead ends: 400 [2023-11-12 02:21:14,809 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1233 GetRequests, 1220 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2023-11-12 02:21:14,811 INFO L413 NwaCegarLoop]: 309 mSDtfsCounter, 437 mSDsluCounter, 721 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 482 SdHoareTripleChecker+Valid, 1030 SdHoareTripleChecker+Invalid, 801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-12 02:21:14,811 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [482 Valid, 1030 Invalid, 801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 688 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-12 02:21:14,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2023-11-12 02:21:14,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 396. [2023-11-12 02:21:14,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 213 states have (on average 1.352112676056338) internal successors, (288), 214 states have internal predecessors, (288), 177 states have call successors, (177), 5 states have call predecessors, (177), 5 states have return successors, (177), 176 states have call predecessors, (177), 177 states have call successors, (177) [2023-11-12 02:21:14,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 642 transitions. [2023-11-12 02:21:14,879 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 642 transitions. Word has length 615 [2023-11-12 02:21:14,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:21:14,881 INFO L495 AbstractCegarLoop]: Abstraction has 396 states and 642 transitions. [2023-11-12 02:21:14,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.9) internal successors, (159), 10 states have internal predecessors, (159), 3 states have call successors, (156), 2 states have call predecessors, (156), 4 states have return successors, (157), 3 states have call predecessors, (157), 3 states have call successors, (157) [2023-11-12 02:21:14,881 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 642 transitions. [2023-11-12 02:21:14,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 616 [2023-11-12 02:21:14,887 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:21:14,888 INFO L195 NwaCegarLoop]: trace histogram [101, 101, 101, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:21:14,901 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf2fff3-da65-4268-b4cd-db1d63dc6d21/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 02:21:15,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf2fff3-da65-4268-b4cd-db1d63dc6d21/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:21:15,097 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:21:15,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:21:15,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1138201281, now seen corresponding path program 1 times [2023-11-12 02:21:15,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:21:15,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803816536] [2023-11-12 02:21:15,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:15,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:21:15,199 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:21:15,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [135550356] [2023-11-12 02:21:15,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:15,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:21:15,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf2fff3-da65-4268-b4cd-db1d63dc6d21/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:21:15,201 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf2fff3-da65-4268-b4cd-db1d63dc6d21/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:21:15,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf2fff3-da65-4268-b4cd-db1d63dc6d21/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 02:21:15,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:15,636 INFO L262 TraceCheckSpWp]: Trace formula consists of 1401 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-12 02:21:15,652 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:21:30,026 INFO L134 CoverageAnalysis]: Checked inductivity of 20200 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20200 trivial. 0 not checked. [2023-11-12 02:21:30,026 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:21:30,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:21:30,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803816536] [2023-11-12 02:21:30,031 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:21:30,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135550356] [2023-11-12 02:21:30,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135550356] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:21:30,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:21:30,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-12 02:21:30,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680838299] [2023-11-12 02:21:30,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:21:30,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-12 02:21:30,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:21:30,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-12 02:21:30,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-11-12 02:21:30,042 INFO L87 Difference]: Start difference. First operand 396 states and 642 transitions. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 1 states have call successors, (101), 1 states have call predecessors, (101), 1 states have return successors, (101), 1 states have call predecessors, (101), 1 states have call successors, (101) [2023-11-12 02:21:31,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:21:31,627 INFO L93 Difference]: Finished difference Result 762 states and 1221 transitions. [2023-11-12 02:21:31,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-12 02:21:31,628 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 1 states have call successors, (101), 1 states have call predecessors, (101), 1 states have return successors, (101), 1 states have call predecessors, (101), 1 states have call successors, (101) Word has length 615 [2023-11-12 02:21:31,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:21:31,634 INFO L225 Difference]: With dead ends: 762 [2023-11-12 02:21:31,634 INFO L226 Difference]: Without dead ends: 496 [2023-11-12 02:21:31,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 622 GetRequests, 607 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2023-11-12 02:21:31,637 INFO L413 NwaCegarLoop]: 441 mSDtfsCounter, 203 mSDsluCounter, 2107 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 2548 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-12 02:21:31,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 2548 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-12 02:21:31,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2023-11-12 02:21:31,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 449. [2023-11-12 02:21:31,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 257 states have (on average 1.3618677042801557) internal successors, (350), 259 states have internal predecessors, (350), 185 states have call successors, (185), 6 states have call predecessors, (185), 6 states have return successors, (185), 183 states have call predecessors, (185), 185 states have call successors, (185) [2023-11-12 02:21:31,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 720 transitions. [2023-11-12 02:21:31,703 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 720 transitions. Word has length 615 [2023-11-12 02:21:31,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:21:31,705 INFO L495 AbstractCegarLoop]: Abstraction has 449 states and 720 transitions. [2023-11-12 02:21:31,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 1 states have call successors, (101), 1 states have call predecessors, (101), 1 states have return successors, (101), 1 states have call predecessors, (101), 1 states have call successors, (101) [2023-11-12 02:21:31,705 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 720 transitions. [2023-11-12 02:21:31,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 616 [2023-11-12 02:21:31,711 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:21:31,712 INFO L195 NwaCegarLoop]: trace histogram [101, 101, 101, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:21:31,721 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf2fff3-da65-4268-b4cd-db1d63dc6d21/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 02:21:31,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf2fff3-da65-4268-b4cd-db1d63dc6d21/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:21:31,921 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:21:31,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:21:31,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1531228291, now seen corresponding path program 1 times [2023-11-12 02:21:31,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:21:31,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187411020] [2023-11-12 02:21:31,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:31,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:21:32,003 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:21:32,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [207004749] [2023-11-12 02:21:32,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:32,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:21:32,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf2fff3-da65-4268-b4cd-db1d63dc6d21/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:21:32,005 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf2fff3-da65-4268-b4cd-db1d63dc6d21/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:21:32,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf2fff3-da65-4268-b4cd-db1d63dc6d21/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 02:21:32,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:32,464 INFO L262 TraceCheckSpWp]: Trace formula consists of 1401 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-12 02:21:32,478 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:21:33,373 INFO L134 CoverageAnalysis]: Checked inductivity of 20200 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20200 trivial. 0 not checked. [2023-11-12 02:21:33,373 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:21:33,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:21:33,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187411020] [2023-11-12 02:21:33,374 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:21:33,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207004749] [2023-11-12 02:21:33,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207004749] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:21:33,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:21:33,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:21:33,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065238706] [2023-11-12 02:21:33,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:21:33,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:21:33,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:21:33,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:21:33,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:21:33,378 INFO L87 Difference]: Start difference. First operand 449 states and 720 transitions. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 1 states have call successors, (101), 1 states have call predecessors, (101), 1 states have return successors, (101), 1 states have call predecessors, (101), 1 states have call successors, (101) [2023-11-12 02:21:34,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:21:34,316 INFO L93 Difference]: Finished difference Result 1367 states and 2205 transitions. [2023-11-12 02:21:34,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:21:34,317 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 1 states have call successors, (101), 1 states have call predecessors, (101), 1 states have return successors, (101), 1 states have call predecessors, (101), 1 states have call successors, (101) Word has length 615 [2023-11-12 02:21:34,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:21:34,329 INFO L225 Difference]: With dead ends: 1367 [2023-11-12 02:21:34,329 INFO L226 Difference]: Without dead ends: 1048 [2023-11-12 02:21:34,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 617 GetRequests, 611 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:21:34,334 INFO L413 NwaCegarLoop]: 433 mSDtfsCounter, 982 mSDsluCounter, 1270 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 609 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 982 SdHoareTripleChecker+Valid, 1703 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 609 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-12 02:21:34,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [982 Valid, 1703 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [609 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-12 02:21:34,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1048 states. [2023-11-12 02:21:34,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1048 to 735. [2023-11-12 02:21:34,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 735 states, 438 states have (on average 1.3972602739726028) internal successors, (612), 440 states have internal predecessors, (612), 286 states have call successors, (286), 10 states have call predecessors, (286), 10 states have return successors, (286), 284 states have call predecessors, (286), 286 states have call successors, (286) [2023-11-12 02:21:34,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 735 states to 735 states and 1184 transitions. [2023-11-12 02:21:34,517 INFO L78 Accepts]: Start accepts. Automaton has 735 states and 1184 transitions. Word has length 615 [2023-11-12 02:21:34,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:21:34,519 INFO L495 AbstractCegarLoop]: Abstraction has 735 states and 1184 transitions. [2023-11-12 02:21:34,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 1 states have call successors, (101), 1 states have call predecessors, (101), 1 states have return successors, (101), 1 states have call predecessors, (101), 1 states have call successors, (101) [2023-11-12 02:21:34,519 INFO L276 IsEmpty]: Start isEmpty. Operand 735 states and 1184 transitions. [2023-11-12 02:21:34,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 616 [2023-11-12 02:21:34,525 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:21:34,526 INFO L195 NwaCegarLoop]: trace histogram [101, 101, 101, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:21:34,541 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf2fff3-da65-4268-b4cd-db1d63dc6d21/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-12 02:21:34,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf2fff3-da65-4268-b4cd-db1d63dc6d21/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-12 02:21:34,735 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:21:34,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:21:34,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1954392379, now seen corresponding path program 1 times [2023-11-12 02:21:34,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:21:34,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281510936] [2023-11-12 02:21:34,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:34,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:21:34,824 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:21:34,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1509892910] [2023-11-12 02:21:34,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:34,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:21:34,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf2fff3-da65-4268-b4cd-db1d63dc6d21/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:21:34,827 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf2fff3-da65-4268-b4cd-db1d63dc6d21/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:21:34,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf2fff3-da65-4268-b4cd-db1d63dc6d21/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 02:21:35,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:35,329 INFO L262 TraceCheckSpWp]: Trace formula consists of 1399 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-12 02:21:35,343 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:21:36,997 INFO L134 CoverageAnalysis]: Checked inductivity of 20200 backedges. 6509 proven. 105 refuted. 0 times theorem prover too weak. 13586 trivial. 0 not checked. [2023-11-12 02:21:36,997 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:21:37,606 INFO L134 CoverageAnalysis]: Checked inductivity of 20200 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20200 trivial. 0 not checked. [2023-11-12 02:21:37,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:21:37,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281510936] [2023-11-12 02:21:37,607 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:21:37,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509892910] [2023-11-12 02:21:37,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509892910] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-12 02:21:37,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:21:37,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 10 [2023-11-12 02:21:37,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000398776] [2023-11-12 02:21:37,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:21:37,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:21:37,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:21:37,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:21:37,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2023-11-12 02:21:37,612 INFO L87 Difference]: Start difference. First operand 735 states and 1184 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 1 states have call successors, (101), 1 states have call predecessors, (101), 1 states have return successors, (101), 1 states have call predecessors, (101), 1 states have call successors, (101) [2023-11-12 02:21:37,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:21:37,732 INFO L93 Difference]: Finished difference Result 1943 states and 3140 transitions. [2023-11-12 02:21:37,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:21:37,733 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 1 states have call successors, (101), 1 states have call predecessors, (101), 1 states have return successors, (101), 1 states have call predecessors, (101), 1 states have call successors, (101) Word has length 615 [2023-11-12 02:21:37,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:21:37,746 INFO L225 Difference]: With dead ends: 1943 [2023-11-12 02:21:37,746 INFO L226 Difference]: Without dead ends: 1338 [2023-11-12 02:21:37,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1228 GetRequests, 1220 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2023-11-12 02:21:37,751 INFO L413 NwaCegarLoop]: 431 mSDtfsCounter, 239 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 855 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:21:37,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [239 Valid, 855 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:21:37,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1338 states. [2023-11-12 02:21:38,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1338 to 1332. [2023-11-12 02:21:38,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1332 states, 817 states have (on average 1.4137086903304774) internal successors, (1155), 820 states have internal predecessors, (1155), 496 states have call successors, (496), 18 states have call predecessors, (496), 18 states have return successors, (496), 493 states have call predecessors, (496), 496 states have call successors, (496) [2023-11-12 02:21:38,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1332 states to 1332 states and 2147 transitions. [2023-11-12 02:21:38,057 INFO L78 Accepts]: Start accepts. Automaton has 1332 states and 2147 transitions. Word has length 615 [2023-11-12 02:21:38,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:21:38,058 INFO L495 AbstractCegarLoop]: Abstraction has 1332 states and 2147 transitions. [2023-11-12 02:21:38,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 1 states have call successors, (101), 1 states have call predecessors, (101), 1 states have return successors, (101), 1 states have call predecessors, (101), 1 states have call successors, (101) [2023-11-12 02:21:38,059 INFO L276 IsEmpty]: Start isEmpty. Operand 1332 states and 2147 transitions. [2023-11-12 02:21:38,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 616 [2023-11-12 02:21:38,065 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:21:38,066 INFO L195 NwaCegarLoop]: trace histogram [101, 101, 101, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:21:38,077 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf2fff3-da65-4268-b4cd-db1d63dc6d21/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-12 02:21:38,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf2fff3-da65-4268-b4cd-db1d63dc6d21/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-12 02:21:38,277 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:21:38,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:21:38,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1699018373, now seen corresponding path program 1 times [2023-11-12 02:21:38,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:21:38,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215130233] [2023-11-12 02:21:38,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:38,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:21:38,365 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:21:38,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [480065219] [2023-11-12 02:21:38,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:38,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:21:38,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf2fff3-da65-4268-b4cd-db1d63dc6d21/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:21:38,367 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf2fff3-da65-4268-b4cd-db1d63dc6d21/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:21:38,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf2fff3-da65-4268-b4cd-db1d63dc6d21/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-12 02:21:38,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:38,861 INFO L262 TraceCheckSpWp]: Trace formula consists of 1399 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-12 02:21:38,875 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:21:40,348 INFO L134 CoverageAnalysis]: Checked inductivity of 20200 backedges. 6509 proven. 105 refuted. 0 times theorem prover too weak. 13586 trivial. 0 not checked. [2023-11-12 02:21:40,349 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:21:41,246 INFO L134 CoverageAnalysis]: Checked inductivity of 20200 backedges. 489 proven. 108 refuted. 0 times theorem prover too weak. 19603 trivial. 0 not checked. [2023-11-12 02:21:41,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:21:41,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215130233] [2023-11-12 02:21:41,247 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:21:41,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480065219] [2023-11-12 02:21:41,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480065219] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:21:41,247 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:21:41,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2023-11-12 02:21:41,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452782713] [2023-11-12 02:21:41,248 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:21:41,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-12 02:21:41,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:21:41,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-12 02:21:41,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2023-11-12 02:21:41,253 INFO L87 Difference]: Start difference. First operand 1332 states and 2147 transitions. Second operand has 18 states, 18 states have (on average 12.38888888888889) internal successors, (223), 18 states have internal predecessors, (223), 6 states have call successors, (202), 4 states have call predecessors, (202), 8 states have return successors, (202), 6 states have call predecessors, (202), 6 states have call successors, (202) [2023-11-12 02:21:48,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:21:48,031 INFO L93 Difference]: Finished difference Result 5583 states and 8865 transitions. [2023-11-12 02:21:48,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-11-12 02:21:48,033 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 12.38888888888889) internal successors, (223), 18 states have internal predecessors, (223), 6 states have call successors, (202), 4 states have call predecessors, (202), 8 states have return successors, (202), 6 states have call predecessors, (202), 6 states have call successors, (202) Word has length 615 [2023-11-12 02:21:48,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:21:48,074 INFO L225 Difference]: With dead ends: 5583 [2023-11-12 02:21:48,074 INFO L226 Difference]: Without dead ends: 4373 [2023-11-12 02:21:48,083 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1282 GetRequests, 1220 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1409 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1101, Invalid=2931, Unknown=0, NotChecked=0, Total=4032 [2023-11-12 02:21:48,085 INFO L413 NwaCegarLoop]: 951 mSDtfsCounter, 3763 mSDsluCounter, 2910 mSDsCounter, 0 mSdLazyCounter, 3386 mSolverCounterSat, 2110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3845 SdHoareTripleChecker+Valid, 3861 SdHoareTripleChecker+Invalid, 5496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2110 IncrementalHoareTripleChecker+Valid, 3386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:21:48,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3845 Valid, 3861 Invalid, 5496 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2110 Valid, 3386 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2023-11-12 02:21:48,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4373 states. [2023-11-12 02:21:49,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4373 to 3654. [2023-11-12 02:21:49,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3654 states, 2295 states have (on average 1.4069716775599128) internal successors, (3229), 2304 states have internal predecessors, (3229), 1294 states have call successors, (1294), 64 states have call predecessors, (1294), 64 states have return successors, (1294), 1285 states have call predecessors, (1294), 1294 states have call successors, (1294) [2023-11-12 02:21:49,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3654 states to 3654 states and 5817 transitions. [2023-11-12 02:21:49,081 INFO L78 Accepts]: Start accepts. Automaton has 3654 states and 5817 transitions. Word has length 615 [2023-11-12 02:21:49,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:21:49,082 INFO L495 AbstractCegarLoop]: Abstraction has 3654 states and 5817 transitions. [2023-11-12 02:21:49,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 12.38888888888889) internal successors, (223), 18 states have internal predecessors, (223), 6 states have call successors, (202), 4 states have call predecessors, (202), 8 states have return successors, (202), 6 states have call predecessors, (202), 6 states have call successors, (202) [2023-11-12 02:21:49,083 INFO L276 IsEmpty]: Start isEmpty. Operand 3654 states and 5817 transitions. [2023-11-12 02:21:49,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 616 [2023-11-12 02:21:49,090 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:21:49,090 INFO L195 NwaCegarLoop]: trace histogram [101, 101, 101, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:21:49,098 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf2fff3-da65-4268-b4cd-db1d63dc6d21/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-12 02:21:49,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf2fff3-da65-4268-b4cd-db1d63dc6d21/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:21:49,298 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:21:49,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:21:49,299 INFO L85 PathProgramCache]: Analyzing trace with hash 351965625, now seen corresponding path program 1 times [2023-11-12 02:21:49,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:21:49,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334840776] [2023-11-12 02:21:49,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:49,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:21:49,374 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:21:49,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1727314776] [2023-11-12 02:21:49,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:21:49,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:21:49,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf2fff3-da65-4268-b4cd-db1d63dc6d21/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:21:49,376 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf2fff3-da65-4268-b4cd-db1d63dc6d21/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:21:49,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf2fff3-da65-4268-b4cd-db1d63dc6d21/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-12 02:21:49,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:21:49,837 INFO L262 TraceCheckSpWp]: Trace formula consists of 1400 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-12 02:21:49,853 INFO L285 TraceCheckSpWp]: Computing forward predicates...