./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/soft_float_4-3a.c.cil.c --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_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/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_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/bitvector/soft_float_4-3a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/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_33980733-eed6-4918-82a6-c37d97446ba7/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 c7e459611ed6ff9d4c49aa04980ca7f1d5aaaf97e8fc0116c264955df4ed453a --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:09:39,814 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:09:39,952 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-12 02:09:39,964 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:09:39,965 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:09:40,017 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:09:40,019 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:09:40,020 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:09:40,021 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:09:40,024 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:09:40,025 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:09:40,026 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:09:40,026 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:09:40,027 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:09:40,028 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:09:40,028 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:09:40,029 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:09:40,029 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:09:40,030 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:09:40,030 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:09:40,031 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:09:40,031 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:09:40,032 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:09:40,034 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:09:40,035 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:09:40,036 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:09:40,036 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:09:40,037 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:09:40,037 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:09:40,038 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:09:40,040 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:09:40,040 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:09:40,040 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:09:40,041 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:09:40,041 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:09:40,041 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:09:40,041 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:09:40,042 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:09:40,042 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:09:40,042 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_33980733-eed6-4918-82a6-c37d97446ba7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c7e459611ed6ff9d4c49aa04980ca7f1d5aaaf97e8fc0116c264955df4ed453a [2023-11-12 02:09:40,417 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:09:40,455 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:09:40,458 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:09:40,460 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:09:40,461 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:09:40,463 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/bitvector/soft_float_4-3a.c.cil.c [2023-11-12 02:09:43,957 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:09:44,258 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:09:44,259 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/sv-benchmarks/c/bitvector/soft_float_4-3a.c.cil.c [2023-11-12 02:09:44,271 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/data/c5fe01d45/1f5a18f74b2a4313b33b78567495b0c6/FLAG75e9f0613 [2023-11-12 02:09:44,291 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/data/c5fe01d45/1f5a18f74b2a4313b33b78567495b0c6 [2023-11-12 02:09:44,294 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:09:44,297 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:09:44,299 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:09:44,299 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:09:44,307 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:09:44,308 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:09:44" (1/1) ... [2023-11-12 02:09:44,310 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4509a188 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:09:44, skipping insertion in model container [2023-11-12 02:09:44,310 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:09:44" (1/1) ... [2023-11-12 02:09:44,350 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:09:44,541 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_33980733-eed6-4918-82a6-c37d97446ba7/sv-benchmarks/c/bitvector/soft_float_4-3a.c.cil.c[730,743] [2023-11-12 02:09:44,608 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:09:44,623 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:09:44,646 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_33980733-eed6-4918-82a6-c37d97446ba7/sv-benchmarks/c/bitvector/soft_float_4-3a.c.cil.c[730,743] [2023-11-12 02:09:44,699 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:09:44,718 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:09:44,719 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:09:44 WrapperNode [2023-11-12 02:09:44,719 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:09:44,720 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:09:44,721 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:09:44,721 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:09:44,731 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:09:44" (1/1) ... [2023-11-12 02:09:44,744 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:09:44" (1/1) ... [2023-11-12 02:09:44,779 INFO L138 Inliner]: procedures = 17, calls = 18, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 56 [2023-11-12 02:09:44,780 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:09:44,781 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:09:44,781 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:09:44,781 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:09:44,794 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:09:44" (1/1) ... [2023-11-12 02:09:44,794 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:09:44" (1/1) ... [2023-11-12 02:09:44,810 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:09:44" (1/1) ... [2023-11-12 02:09:44,824 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:09:44" (1/1) ... [2023-11-12 02:09:44,831 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:09:44" (1/1) ... [2023-11-12 02:09:44,838 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:09:44" (1/1) ... [2023-11-12 02:09:44,854 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:09:44" (1/1) ... [2023-11-12 02:09:44,855 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:09:44" (1/1) ... [2023-11-12 02:09:44,858 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:09:44,860 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:09:44,860 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:09:44,860 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:09:44,861 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:09:44" (1/1) ... [2023-11-12 02:09:44,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:09:44,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:09:44,926 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:09:44,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:09:44,985 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:09:44,986 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:09:44,986 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2023-11-12 02:09:44,987 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2023-11-12 02:09:44,987 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:09:44,987 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:09:44,987 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2023-11-12 02:09:44,988 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2023-11-12 02:09:44,988 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-12 02:09:44,988 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-12 02:09:45,129 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:09:45,131 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:09:45,587 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:09:45,601 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:09:45,602 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-12 02:09:45,605 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:09:45 BoogieIcfgContainer [2023-11-12 02:09:45,607 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:09:45,611 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:09:45,613 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:09:45,618 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:09:45,619 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:09:44" (1/3) ... [2023-11-12 02:09:45,620 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36d647 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:09:45, skipping insertion in model container [2023-11-12 02:09:45,620 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:09:44" (2/3) ... [2023-11-12 02:09:45,624 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36d647 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:09:45, skipping insertion in model container [2023-11-12 02:09:45,624 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:09:45" (3/3) ... [2023-11-12 02:09:45,626 INFO L112 eAbstractionObserver]: Analyzing ICFG soft_float_4-3a.c.cil.c [2023-11-12 02:09:45,652 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:09:45,653 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 02:09:45,730 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:09:45,740 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;@71dde10f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:09:45,740 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 02:09:45,746 INFO L276 IsEmpty]: Start isEmpty. Operand has 71 states, 57 states have (on average 1.5614035087719298) internal successors, (89), 58 states have internal predecessors, (89), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-12 02:09:45,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-12 02:09:45,762 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:09:45,764 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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 02:09:45,766 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:09:45,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:09:45,775 INFO L85 PathProgramCache]: Analyzing trace with hash 719757206, now seen corresponding path program 1 times [2023-11-12 02:09:45,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:09:45,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613318750] [2023-11-12 02:09:45,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:09:45,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:09:46,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:46,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:09:46,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:46,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-12 02:09:46,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:46,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-12 02:09:46,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:46,698 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-12 02:09:46,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:09:46,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613318750] [2023-11-12 02:09:46,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613318750] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:09:46,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978673259] [2023-11-12 02:09:46,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:09:46,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:09:46,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:09:46,706 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:09:46,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:09:46,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:46,869 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-12 02:09:46,878 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:09:47,062 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 02:09:47,062 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:09:47,371 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-12 02:09:47,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978673259] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:09:47,373 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:09:47,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 18 [2023-11-12 02:09:47,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964713074] [2023-11-12 02:09:47,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:09:47,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-12 02:09:47,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:09:47,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-12 02:09:47,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2023-11-12 02:09:47,453 INFO L87 Difference]: Start difference. First operand has 71 states, 57 states have (on average 1.5614035087719298) internal successors, (89), 58 states have internal predecessors, (89), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 14 states have internal predecessors, (34), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-12 02:09:48,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:09:48,218 INFO L93 Difference]: Finished difference Result 194 states and 310 transitions. [2023-11-12 02:09:48,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-12 02:09:48,221 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 14 states have internal predecessors, (34), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 35 [2023-11-12 02:09:48,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:09:48,236 INFO L225 Difference]: With dead ends: 194 [2023-11-12 02:09:48,236 INFO L226 Difference]: Without dead ends: 120 [2023-11-12 02:09:48,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2023-11-12 02:09:48,247 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 79 mSDsluCounter, 1002 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 1081 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 02:09:48,249 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 1081 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 02:09:48,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2023-11-12 02:09:48,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 85. [2023-11-12 02:09:48,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 67 states have (on average 1.3880597014925373) internal successors, (93), 69 states have internal predecessors, (93), 11 states have call successors, (11), 5 states have call predecessors, (11), 6 states have return successors, (16), 10 states have call predecessors, (16), 10 states have call successors, (16) [2023-11-12 02:09:48,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 120 transitions. [2023-11-12 02:09:48,335 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 120 transitions. Word has length 35 [2023-11-12 02:09:48,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:09:48,336 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 120 transitions. [2023-11-12 02:09:48,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 14 states have internal predecessors, (34), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-12 02:09:48,337 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 120 transitions. [2023-11-12 02:09:48,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-12 02:09:48,341 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:09:48,341 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 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 02:09:48,359 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 02:09:48,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-12 02:09:48,553 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:09:48,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:09:48,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1248382971, now seen corresponding path program 1 times [2023-11-12 02:09:48,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:09:48,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706866293] [2023-11-12 02:09:48,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:09:48,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:09:48,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:48,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:09:48,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:48,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-12 02:09:48,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:48,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-12 02:09:48,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:48,832 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-12 02:09:48,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:09:48,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706866293] [2023-11-12 02:09:48,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706866293] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:09:48,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:09:48,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-12 02:09:48,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098139861] [2023-11-12 02:09:48,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:09:48,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 02:09:48,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:09:48,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 02:09:48,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:09:48,837 INFO L87 Difference]: Start difference. First operand 85 states and 120 transitions. Second operand has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-12 02:09:48,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:09:48,950 INFO L93 Difference]: Finished difference Result 152 states and 210 transitions. [2023-11-12 02:09:48,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 02:09:48,952 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 39 [2023-11-12 02:09:48,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:09:48,957 INFO L225 Difference]: With dead ends: 152 [2023-11-12 02:09:48,957 INFO L226 Difference]: Without dead ends: 108 [2023-11-12 02:09:48,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-11-12 02:09:48,960 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 18 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 621 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:09:48,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 621 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:09:48,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2023-11-12 02:09:48,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 93. [2023-11-12 02:09:48,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 73 states have (on average 1.356164383561644) internal successors, (99), 75 states have internal predecessors, (99), 12 states have call successors, (12), 6 states have call predecessors, (12), 7 states have return successors, (17), 11 states have call predecessors, (17), 11 states have call successors, (17) [2023-11-12 02:09:48,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 128 transitions. [2023-11-12 02:09:48,980 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 128 transitions. Word has length 39 [2023-11-12 02:09:48,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:09:48,981 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 128 transitions. [2023-11-12 02:09:48,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-12 02:09:48,982 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 128 transitions. [2023-11-12 02:09:48,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-12 02:09:48,984 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:09:48,985 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 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 02:09:48,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 02:09:48,985 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:09:48,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:09:48,986 INFO L85 PathProgramCache]: Analyzing trace with hash -866466067, now seen corresponding path program 1 times [2023-11-12 02:09:48,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:09:48,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692546320] [2023-11-12 02:09:48,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:09:48,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:09:49,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:49,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:09:49,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:49,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-12 02:09:49,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:49,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-12 02:09:49,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:49,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-12 02:09:49,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:49,304 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-12 02:09:49,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:09:49,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692546320] [2023-11-12 02:09:49,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692546320] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:09:49,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:09:49,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-12 02:09:49,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698699008] [2023-11-12 02:09:49,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:09:49,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-12 02:09:49,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:09:49,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-12 02:09:49,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-12 02:09:49,313 INFO L87 Difference]: Start difference. First operand 93 states and 128 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-12 02:09:49,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:09:49,487 INFO L93 Difference]: Finished difference Result 166 states and 233 transitions. [2023-11-12 02:09:49,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 02:09:49,488 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 43 [2023-11-12 02:09:49,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:09:49,496 INFO L225 Difference]: With dead ends: 166 [2023-11-12 02:09:49,497 INFO L226 Difference]: Without dead ends: 131 [2023-11-12 02:09:49,501 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-11-12 02:09:49,505 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 82 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 731 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:09:49,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 731 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:09:49,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2023-11-12 02:09:49,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 123. [2023-11-12 02:09:49,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 98 states have (on average 1.3877551020408163) internal successors, (136), 100 states have internal predecessors, (136), 16 states have call successors, (16), 7 states have call predecessors, (16), 8 states have return successors, (21), 15 states have call predecessors, (21), 15 states have call successors, (21) [2023-11-12 02:09:49,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 173 transitions. [2023-11-12 02:09:49,548 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 173 transitions. Word has length 43 [2023-11-12 02:09:49,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:09:49,549 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 173 transitions. [2023-11-12 02:09:49,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-12 02:09:49,550 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 173 transitions. [2023-11-12 02:09:49,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-12 02:09:49,560 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:09:49,561 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 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 02:09:49,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 02:09:49,562 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:09:49,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:09:49,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1259493077, now seen corresponding path program 1 times [2023-11-12 02:09:49,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:09:49,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878253497] [2023-11-12 02:09:49,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:09:49,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:09:49,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:49,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:09:49,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:49,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-12 02:09:49,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:49,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-12 02:09:49,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:49,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-12 02:09:49,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:49,898 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-12 02:09:49,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:09:49,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878253497] [2023-11-12 02:09:49,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878253497] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:09:49,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135417278] [2023-11-12 02:09:49,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:09:49,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:09:49,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:09:49,909 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:09:49,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:09:50,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:50,010 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-12 02:09:50,014 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:09:50,108 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 02:09:50,108 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:09:50,313 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-12 02:09:50,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135417278] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:09:50,314 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:09:50,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 8] total 16 [2023-11-12 02:09:50,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21988842] [2023-11-12 02:09:50,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:09:50,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-12 02:09:50,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:09:50,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-12 02:09:50,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2023-11-12 02:09:50,325 INFO L87 Difference]: Start difference. First operand 123 states and 173 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 12 states have internal predecessors, (41), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) [2023-11-12 02:09:50,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:09:50,733 INFO L93 Difference]: Finished difference Result 234 states and 333 transitions. [2023-11-12 02:09:50,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-12 02:09:50,734 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 12 states have internal predecessors, (41), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) Word has length 43 [2023-11-12 02:09:50,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:09:50,740 INFO L225 Difference]: With dead ends: 234 [2023-11-12 02:09:50,740 INFO L226 Difference]: Without dead ends: 173 [2023-11-12 02:09:50,743 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2023-11-12 02:09:50,746 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 67 mSDsluCounter, 687 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 777 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 02:09:50,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 777 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 02:09:50,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2023-11-12 02:09:50,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 133. [2023-11-12 02:09:50,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 105 states have (on average 1.361904761904762) internal successors, (143), 107 states have internal predecessors, (143), 18 states have call successors, (18), 8 states have call predecessors, (18), 9 states have return successors, (23), 17 states have call predecessors, (23), 17 states have call successors, (23) [2023-11-12 02:09:50,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 184 transitions. [2023-11-12 02:09:50,787 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 184 transitions. Word has length 43 [2023-11-12 02:09:50,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:09:50,789 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 184 transitions. [2023-11-12 02:09:50,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 12 states have internal predecessors, (41), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) [2023-11-12 02:09:50,790 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 184 transitions. [2023-11-12 02:09:50,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-12 02:09:50,794 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:09:50,795 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 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 02:09:50,810 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 02:09:51,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:09:51,002 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:09:51,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:09:51,003 INFO L85 PathProgramCache]: Analyzing trace with hash -1671451994, now seen corresponding path program 1 times [2023-11-12 02:09:51,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:09:51,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658253559] [2023-11-12 02:09:51,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:09:51,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:09:51,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:51,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:09:51,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:51,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-12 02:09:51,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:51,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-12 02:09:51,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:51,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-12 02:09:51,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:51,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-12 02:09:51,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:51,583 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-12 02:09:51,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:09:51,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658253559] [2023-11-12 02:09:51,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658253559] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:09:51,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:09:51,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2023-11-12 02:09:51,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950104721] [2023-11-12 02:09:51,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:09:51,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-12 02:09:51,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:09:51,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-12 02:09:51,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2023-11-12 02:09:51,588 INFO L87 Difference]: Start difference. First operand 133 states and 184 transitions. Second operand has 15 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 5 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2023-11-12 02:09:51,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:09:51,923 INFO L93 Difference]: Finished difference Result 191 states and 262 transitions. [2023-11-12 02:09:51,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-12 02:09:51,924 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 5 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 44 [2023-11-12 02:09:51,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:09:51,928 INFO L225 Difference]: With dead ends: 191 [2023-11-12 02:09:51,928 INFO L226 Difference]: Without dead ends: 183 [2023-11-12 02:09:51,929 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2023-11-12 02:09:51,930 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 63 mSDsluCounter, 934 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 1021 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 02:09:51,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 1021 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 02:09:51,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2023-11-12 02:09:51,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 138. [2023-11-12 02:09:51,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 109 states have (on average 1.348623853211009) internal successors, (147), 110 states have internal predecessors, (147), 19 states have call successors, (19), 8 states have call predecessors, (19), 9 states have return successors, (24), 19 states have call predecessors, (24), 18 states have call successors, (24) [2023-11-12 02:09:51,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 190 transitions. [2023-11-12 02:09:51,961 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 190 transitions. Word has length 44 [2023-11-12 02:09:51,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:09:51,963 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 190 transitions. [2023-11-12 02:09:51,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 5 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2023-11-12 02:09:51,963 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 190 transitions. [2023-11-12 02:09:51,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-12 02:09:51,965 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:09:51,966 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 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 02:09:51,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-12 02:09:51,966 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:09:51,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:09:51,967 INFO L85 PathProgramCache]: Analyzing trace with hash 2029476726, now seen corresponding path program 2 times [2023-11-12 02:09:51,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:09:51,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772930526] [2023-11-12 02:09:51,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:09:51,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:09:52,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:52,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:09:52,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:52,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-12 02:09:52,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:52,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-12 02:09:52,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:52,252 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-12 02:09:52,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:09:52,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772930526] [2023-11-12 02:09:52,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772930526] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:09:52,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903147524] [2023-11-12 02:09:52,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:09:52,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:09:52,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:09:52,255 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:09:52,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 02:09:52,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-12 02:09:52,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:09:52,393 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-12 02:09:52,396 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:09:52,627 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-12 02:09:52,627 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:09:52,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903147524] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:09:52,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:09:52,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [8] total 13 [2023-11-12 02:09:52,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296926367] [2023-11-12 02:09:52,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:09:52,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-12 02:09:52,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:09:52,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-12 02:09:52,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2023-11-12 02:09:52,630 INFO L87 Difference]: Start difference. First operand 138 states and 190 transitions. Second operand has 10 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-12 02:09:53,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:09:53,075 INFO L93 Difference]: Finished difference Result 264 states and 369 transitions. [2023-11-12 02:09:53,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-12 02:09:53,076 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 43 [2023-11-12 02:09:53,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:09:53,079 INFO L225 Difference]: With dead ends: 264 [2023-11-12 02:09:53,079 INFO L226 Difference]: Without dead ends: 212 [2023-11-12 02:09:53,080 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2023-11-12 02:09:53,081 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 139 mSDsluCounter, 1210 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 1387 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 02:09:53,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 1387 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 02:09:53,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2023-11-12 02:09:53,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 180. [2023-11-12 02:09:53,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 143 states have (on average 1.3496503496503496) internal successors, (193), 145 states have internal predecessors, (193), 24 states have call successors, (24), 10 states have call predecessors, (24), 12 states have return successors, (32), 24 states have call predecessors, (32), 23 states have call successors, (32) [2023-11-12 02:09:53,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 249 transitions. [2023-11-12 02:09:53,118 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 249 transitions. Word has length 43 [2023-11-12 02:09:53,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:09:53,120 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 249 transitions. [2023-11-12 02:09:53,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-12 02:09:53,120 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 249 transitions. [2023-11-12 02:09:53,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-12 02:09:53,122 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:09:53,123 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 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 02:09:53,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 02:09:53,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:09:53,330 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:09:53,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:09:53,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1636449716, now seen corresponding path program 1 times [2023-11-12 02:09:53,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:09:53,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510017294] [2023-11-12 02:09:53,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:09:53,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:09:53,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:53,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:09:53,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:53,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-12 02:09:53,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:53,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-12 02:09:53,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:53,657 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-12 02:09:53,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:09:53,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510017294] [2023-11-12 02:09:53,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510017294] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:09:53,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182328719] [2023-11-12 02:09:53,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:09:53,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:09:53,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:09:53,660 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:09:53,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 02:09:53,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:53,750 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-12 02:09:53,754 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:09:54,034 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-12 02:09:54,034 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:09:54,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182328719] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:09:54,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:09:54,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [9] total 17 [2023-11-12 02:09:54,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443768162] [2023-11-12 02:09:54,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:09:54,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-12 02:09:54,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:09:54,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-12 02:09:54,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2023-11-12 02:09:54,038 INFO L87 Difference]: Start difference. First operand 180 states and 249 transitions. Second operand has 14 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 10 states have internal predecessors, (26), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-12 02:09:54,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:09:54,428 INFO L93 Difference]: Finished difference Result 327 states and 467 transitions. [2023-11-12 02:09:54,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-12 02:09:54,429 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 10 states have internal predecessors, (26), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 43 [2023-11-12 02:09:54,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:09:54,433 INFO L225 Difference]: With dead ends: 327 [2023-11-12 02:09:54,438 INFO L226 Difference]: Without dead ends: 262 [2023-11-12 02:09:54,439 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2023-11-12 02:09:54,441 INFO L413 NwaCegarLoop]: 145 mSDtfsCounter, 137 mSDsluCounter, 1428 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 1573 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 02:09:54,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 1573 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 02:09:54,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2023-11-12 02:09:54,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 244. [2023-11-12 02:09:54,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 195 states have (on average 1.358974358974359) internal successors, (265), 197 states have internal predecessors, (265), 33 states have call successors, (33), 13 states have call predecessors, (33), 15 states have return successors, (44), 33 states have call predecessors, (44), 32 states have call successors, (44) [2023-11-12 02:09:54,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 342 transitions. [2023-11-12 02:09:54,482 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 342 transitions. Word has length 43 [2023-11-12 02:09:54,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:09:54,482 INFO L495 AbstractCegarLoop]: Abstraction has 244 states and 342 transitions. [2023-11-12 02:09:54,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 10 states have internal predecessors, (26), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-12 02:09:54,483 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 342 transitions. [2023-11-12 02:09:54,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-12 02:09:54,485 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:09:54,485 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 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 02:09:54,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 02:09:54,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-12 02:09:54,693 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:09:54,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:09:54,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1697131670, now seen corresponding path program 1 times [2023-11-12 02:09:54,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:09:54,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250817450] [2023-11-12 02:09:54,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:09:54,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:09:54,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:54,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:09:54,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:54,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-12 02:09:54,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:54,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-12 02:09:54,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:54,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-12 02:09:54,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:54,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-12 02:09:54,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:54,799 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-12 02:09:54,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:09:54,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250817450] [2023-11-12 02:09:54,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250817450] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:09:54,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:09:54,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 02:09:54,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873224670] [2023-11-12 02:09:54,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:09:54,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 02:09:54,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:09:54,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 02:09:54,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:09:54,802 INFO L87 Difference]: Start difference. First operand 244 states and 342 transitions. Second operand has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-11-12 02:09:54,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:09:54,856 INFO L93 Difference]: Finished difference Result 252 states and 349 transitions. [2023-11-12 02:09:54,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 02:09:54,856 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 46 [2023-11-12 02:09:54,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:09:54,859 INFO L225 Difference]: With dead ends: 252 [2023-11-12 02:09:54,859 INFO L226 Difference]: Without dead ends: 237 [2023-11-12 02:09:54,860 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:09:54,861 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 5 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:09:54,861 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 468 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:09:54,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2023-11-12 02:09:54,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 237. [2023-11-12 02:09:54,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 190 states have (on average 1.3631578947368421) internal successors, (259), 193 states have internal predecessors, (259), 31 states have call successors, (31), 13 states have call predecessors, (31), 15 states have return successors, (40), 30 states have call predecessors, (40), 30 states have call successors, (40) [2023-11-12 02:09:54,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 330 transitions. [2023-11-12 02:09:54,883 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 330 transitions. Word has length 46 [2023-11-12 02:09:54,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:09:54,883 INFO L495 AbstractCegarLoop]: Abstraction has 237 states and 330 transitions. [2023-11-12 02:09:54,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-11-12 02:09:54,884 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 330 transitions. [2023-11-12 02:09:54,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-12 02:09:54,885 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:09:54,885 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 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 02:09:54,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-12 02:09:54,886 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:09:54,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:09:54,886 INFO L85 PathProgramCache]: Analyzing trace with hash -393214121, now seen corresponding path program 1 times [2023-11-12 02:09:54,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:09:54,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80963037] [2023-11-12 02:09:54,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:09:54,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:09:54,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:54,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:09:54,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:54,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-12 02:09:54,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:54,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-12 02:09:54,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:54,950 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-12 02:09:54,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:09:54,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80963037] [2023-11-12 02:09:54,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80963037] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:09:54,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548260005] [2023-11-12 02:09:54,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:09:54,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:09:54,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:09:54,958 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:09:54,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 02:09:55,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:55,036 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 02:09:55,038 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:09:55,058 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-12 02:09:55,059 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:09:55,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548260005] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:09:55,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:09:55,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2023-11-12 02:09:55,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26446179] [2023-11-12 02:09:55,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:09:55,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:09:55,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:09:55,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:09:55,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:09:55,062 INFO L87 Difference]: Start difference. First operand 237 states and 330 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-12 02:09:55,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:09:55,126 INFO L93 Difference]: Finished difference Result 398 states and 555 transitions. [2023-11-12 02:09:55,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:09:55,129 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 46 [2023-11-12 02:09:55,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:09:55,131 INFO L225 Difference]: With dead ends: 398 [2023-11-12 02:09:55,132 INFO L226 Difference]: Without dead ends: 242 [2023-11-12 02:09:55,133 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:09:55,136 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 7 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:09:55,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 169 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:09:55,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2023-11-12 02:09:55,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 240. [2023-11-12 02:09:55,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 193 states have (on average 1.3626943005181347) internal successors, (263), 196 states have internal predecessors, (263), 31 states have call successors, (31), 13 states have call predecessors, (31), 15 states have return successors, (40), 30 states have call predecessors, (40), 30 states have call successors, (40) [2023-11-12 02:09:55,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 334 transitions. [2023-11-12 02:09:55,161 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 334 transitions. Word has length 46 [2023-11-12 02:09:55,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:09:55,162 INFO L495 AbstractCegarLoop]: Abstraction has 240 states and 334 transitions. [2023-11-12 02:09:55,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-12 02:09:55,162 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 334 transitions. [2023-11-12 02:09:55,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-12 02:09:55,164 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:09:55,164 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:09:55,177 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 02:09:55,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:09:55,372 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:09:55,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:09:55,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1471830682, now seen corresponding path program 1 times [2023-11-12 02:09:55,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:09:55,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317425516] [2023-11-12 02:09:55,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:09:55,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:09:55,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:55,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:09:55,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:55,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-12 02:09:55,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:55,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-12 02:09:55,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:55,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-11-12 02:09:55,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:55,623 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-12 02:09:55,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:09:55,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317425516] [2023-11-12 02:09:55,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317425516] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:09:55,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:09:55,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-12 02:09:55,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130680512] [2023-11-12 02:09:55,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:09:55,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-12 02:09:55,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:09:55,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-12 02:09:55,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-11-12 02:09:55,627 INFO L87 Difference]: Start difference. First operand 240 states and 334 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 7 states have internal predecessors, (33), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-12 02:09:55,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:09:55,727 INFO L93 Difference]: Finished difference Result 262 states and 357 transitions. [2023-11-12 02:09:55,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 02:09:55,728 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 7 states have internal predecessors, (33), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 47 [2023-11-12 02:09:55,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:09:55,731 INFO L225 Difference]: With dead ends: 262 [2023-11-12 02:09:55,731 INFO L226 Difference]: Without dead ends: 227 [2023-11-12 02:09:55,732 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2023-11-12 02:09:55,733 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 19 mSDsluCounter, 555 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 651 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:09:55,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 651 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:09:55,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2023-11-12 02:09:55,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 218. [2023-11-12 02:09:55,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 174 states have (on average 1.339080459770115) internal successors, (233), 177 states have internal predecessors, (233), 28 states have call successors, (28), 13 states have call predecessors, (28), 15 states have return successors, (37), 27 states have call predecessors, (37), 27 states have call successors, (37) [2023-11-12 02:09:55,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 298 transitions. [2023-11-12 02:09:55,756 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 298 transitions. Word has length 47 [2023-11-12 02:09:55,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:09:55,757 INFO L495 AbstractCegarLoop]: Abstraction has 218 states and 298 transitions. [2023-11-12 02:09:55,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 7 states have internal predecessors, (33), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-12 02:09:55,757 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 298 transitions. [2023-11-12 02:09:55,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-11-12 02:09:55,758 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:09:55,759 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 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 02:09:55,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-12 02:09:55,759 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:09:55,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:09:55,760 INFO L85 PathProgramCache]: Analyzing trace with hash -419714221, now seen corresponding path program 1 times [2023-11-12 02:09:55,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:09:55,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737105310] [2023-11-12 02:09:55,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:09:55,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:09:55,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:55,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:09:55,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:55,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-12 02:09:55,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:55,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-12 02:09:55,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:55,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-11-12 02:09:55,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:55,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-12 02:09:55,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:56,053 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-12 02:09:56,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:09:56,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737105310] [2023-11-12 02:09:56,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737105310] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:09:56,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526419583] [2023-11-12 02:09:56,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:09:56,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:09:56,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:09:56,072 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:09:56,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 02:09:56,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:56,161 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-12 02:09:56,164 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:09:56,408 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-12 02:09:56,408 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:09:57,013 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-12 02:09:57,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526419583] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:09:57,014 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:09:57,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 13] total 32 [2023-11-12 02:09:57,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479270952] [2023-11-12 02:09:57,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:09:57,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-12 02:09:57,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:09:57,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-12 02:09:57,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=904, Unknown=0, NotChecked=0, Total=992 [2023-11-12 02:09:57,017 INFO L87 Difference]: Start difference. First operand 218 states and 298 transitions. Second operand has 32 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 25 states have internal predecessors, (50), 6 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 8 states have call predecessors, (10), 5 states have call successors, (10) [2023-11-12 02:09:59,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:09:59,383 INFO L93 Difference]: Finished difference Result 431 states and 613 transitions. [2023-11-12 02:09:59,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-11-12 02:09:59,384 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 25 states have internal predecessors, (50), 6 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 8 states have call predecessors, (10), 5 states have call successors, (10) Word has length 48 [2023-11-12 02:09:59,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:09:59,388 INFO L225 Difference]: With dead ends: 431 [2023-11-12 02:09:59,388 INFO L226 Difference]: Without dead ends: 406 [2023-11-12 02:09:59,391 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=404, Invalid=3502, Unknown=0, NotChecked=0, Total=3906 [2023-11-12 02:09:59,393 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 385 mSDsluCounter, 3140 mSDsCounter, 0 mSdLazyCounter, 1067 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 3318 SdHoareTripleChecker+Invalid, 1159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1067 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:09:59,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [417 Valid, 3318 Invalid, 1159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1067 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-12 02:09:59,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2023-11-12 02:09:59,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 263. [2023-11-12 02:09:59,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 207 states have (on average 1.3236714975845412) internal successors, (274), 215 states have internal predecessors, (274), 35 states have call successors, (35), 12 states have call predecessors, (35), 20 states have return successors, (56), 35 states have call predecessors, (56), 34 states have call successors, (56) [2023-11-12 02:09:59,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 365 transitions. [2023-11-12 02:09:59,435 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 365 transitions. Word has length 48 [2023-11-12 02:09:59,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:09:59,437 INFO L495 AbstractCegarLoop]: Abstraction has 263 states and 365 transitions. [2023-11-12 02:09:59,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 25 states have internal predecessors, (50), 6 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 8 states have call predecessors, (10), 5 states have call successors, (10) [2023-11-12 02:09:59,437 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 365 transitions. [2023-11-12 02:09:59,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-12 02:09:59,439 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:09:59,439 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:09:59,451 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-12 02:09:59,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-12 02:09:59,646 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:09:59,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:09:59,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1789039327, now seen corresponding path program 1 times [2023-11-12 02:09:59,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:09:59,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617896773] [2023-11-12 02:09:59,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:09:59,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:09:59,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:59,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:09:59,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:59,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-12 02:09:59,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:59,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-11-12 02:09:59,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:59,722 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-12 02:09:59,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:09:59,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617896773] [2023-11-12 02:09:59,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617896773] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:09:59,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679155919] [2023-11-12 02:09:59,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:09:59,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:09:59,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:09:59,725 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:09:59,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 02:09:59,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:59,807 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 02:09:59,809 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:09:59,829 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-12 02:09:59,830 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:09:59,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679155919] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:09:59,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:09:59,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 3 [2023-11-12 02:09:59,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552162839] [2023-11-12 02:09:59,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:09:59,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:09:59,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:09:59,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:09:59,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:09:59,833 INFO L87 Difference]: Start difference. First operand 263 states and 365 transitions. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-12 02:09:59,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:09:59,887 INFO L93 Difference]: Finished difference Result 451 states and 624 transitions. [2023-11-12 02:09:59,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:09:59,888 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 47 [2023-11-12 02:09:59,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:09:59,892 INFO L225 Difference]: With dead ends: 451 [2023-11-12 02:09:59,892 INFO L226 Difference]: Without dead ends: 266 [2023-11-12 02:09:59,893 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 54 SyntacticMatches, 1 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 02:09:59,895 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 6 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:09:59,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 164 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:09:59,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2023-11-12 02:09:59,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 265. [2023-11-12 02:09:59,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 209 states have (on average 1.3205741626794258) internal successors, (276), 217 states have internal predecessors, (276), 35 states have call successors, (35), 12 states have call predecessors, (35), 20 states have return successors, (56), 35 states have call predecessors, (56), 34 states have call successors, (56) [2023-11-12 02:09:59,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 367 transitions. [2023-11-12 02:09:59,929 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 367 transitions. Word has length 47 [2023-11-12 02:09:59,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:09:59,929 INFO L495 AbstractCegarLoop]: Abstraction has 265 states and 367 transitions. [2023-11-12 02:09:59,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-12 02:09:59,930 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 367 transitions. [2023-11-12 02:09:59,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-12 02:09:59,931 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:09:59,932 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:09:59,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-12 02:10:00,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-12 02:10:00,138 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:10:00,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:10:00,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1804328095, now seen corresponding path program 1 times [2023-11-12 02:10:00,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:10:00,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082661026] [2023-11-12 02:10:00,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:10:00,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:10:00,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:10:00,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:10:00,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:10:00,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-12 02:10:00,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:10:00,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-11-12 02:10:00,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:10:00,470 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-12 02:10:00,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:10:00,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082661026] [2023-11-12 02:10:00,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082661026] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:10:00,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:10:00,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-12 02:10:00,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508018369] [2023-11-12 02:10:00,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:10:00,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-12 02:10:00,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:10:00,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-12 02:10:00,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-12 02:10:00,474 INFO L87 Difference]: Start difference. First operand 265 states and 367 transitions. Second operand has 9 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-12 02:10:00,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:10:00,656 INFO L93 Difference]: Finished difference Result 431 states and 604 transitions. [2023-11-12 02:10:00,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 02:10:00,657 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 47 [2023-11-12 02:10:00,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:10:00,660 INFO L225 Difference]: With dead ends: 431 [2023-11-12 02:10:00,660 INFO L226 Difference]: Without dead ends: 289 [2023-11-12 02:10:00,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2023-11-12 02:10:00,662 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 100 mSDsluCounter, 739 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 848 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:10:00,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 848 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:10:00,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2023-11-12 02:10:00,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 265. [2023-11-12 02:10:00,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 209 states have (on average 1.3110047846889952) internal successors, (274), 217 states have internal predecessors, (274), 35 states have call successors, (35), 12 states have call predecessors, (35), 20 states have return successors, (56), 35 states have call predecessors, (56), 34 states have call successors, (56) [2023-11-12 02:10:00,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 365 transitions. [2023-11-12 02:10:00,690 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 365 transitions. Word has length 47 [2023-11-12 02:10:00,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:10:00,691 INFO L495 AbstractCegarLoop]: Abstraction has 265 states and 365 transitions. [2023-11-12 02:10:00,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-12 02:10:00,691 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 365 transitions. [2023-11-12 02:10:00,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-11-12 02:10:00,693 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:10:00,693 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 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 02:10:00,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-12 02:10:00,693 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:10:00,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:10:00,694 INFO L85 PathProgramCache]: Analyzing trace with hash 694141333, now seen corresponding path program 2 times [2023-11-12 02:10:00,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:10:00,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988668552] [2023-11-12 02:10:00,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:10:00,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:10:00,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:10:00,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:10:00,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:10:00,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-12 02:10:00,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:10:00,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-12 02:10:00,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:10:00,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-11-12 02:10:00,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:10:00,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-12 02:10:00,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:10:00,973 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-12 02:10:00,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:10:00,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988668552] [2023-11-12 02:10:00,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988668552] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:10:00,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232943849] [2023-11-12 02:10:00,975 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:10:00,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:10:00,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:10:00,976 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:10:01,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-12 02:10:01,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:10:01,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:10:01,074 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-12 02:10:01,077 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:10:01,339 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-12 02:10:01,339 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:10:01,892 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-12 02:10:01,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232943849] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:10:01,892 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:10:01,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 13] total 32 [2023-11-12 02:10:01,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898509049] [2023-11-12 02:10:01,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:10:01,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-12 02:10:01,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:10:01,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-12 02:10:01,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=904, Unknown=0, NotChecked=0, Total=992 [2023-11-12 02:10:01,895 INFO L87 Difference]: Start difference. First operand 265 states and 365 transitions. Second operand has 32 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 25 states have internal predecessors, (51), 6 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (11), 9 states have call predecessors, (11), 5 states have call successors, (11) [2023-11-12 02:10:03,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:10:03,868 INFO L93 Difference]: Finished difference Result 449 states and 657 transitions. [2023-11-12 02:10:03,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-11-12 02:10:03,869 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 25 states have internal predecessors, (51), 6 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (11), 9 states have call predecessors, (11), 5 states have call successors, (11) Word has length 48 [2023-11-12 02:10:03,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:10:03,873 INFO L225 Difference]: With dead ends: 449 [2023-11-12 02:10:03,873 INFO L226 Difference]: Without dead ends: 436 [2023-11-12 02:10:03,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=357, Invalid=3183, Unknown=0, NotChecked=0, Total=3540 [2023-11-12 02:10:03,876 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 387 mSDsluCounter, 4343 mSDsCounter, 0 mSdLazyCounter, 1231 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 416 SdHoareTripleChecker+Valid, 4533 SdHoareTripleChecker+Invalid, 1304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:10:03,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [416 Valid, 4533 Invalid, 1304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1231 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-12 02:10:03,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2023-11-12 02:10:03,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 278. [2023-11-12 02:10:03,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 217 states have (on average 1.2995391705069124) internal successors, (282), 225 states have internal predecessors, (282), 39 states have call successors, (39), 13 states have call predecessors, (39), 21 states have return successors, (70), 39 states have call predecessors, (70), 38 states have call successors, (70) [2023-11-12 02:10:03,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 391 transitions. [2023-11-12 02:10:03,913 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 391 transitions. Word has length 48 [2023-11-12 02:10:03,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:10:03,913 INFO L495 AbstractCegarLoop]: Abstraction has 278 states and 391 transitions. [2023-11-12 02:10:03,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 25 states have internal predecessors, (51), 6 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (11), 9 states have call predecessors, (11), 5 states have call successors, (11) [2023-11-12 02:10:03,914 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 391 transitions. [2023-11-12 02:10:03,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-12 02:10:03,915 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:10:03,915 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:10:03,928 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-12 02:10:04,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-12 02:10:04,121 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:10:04,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:10:04,122 INFO L85 PathProgramCache]: Analyzing trace with hash -254055191, now seen corresponding path program 1 times [2023-11-12 02:10:04,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:10:04,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359013578] [2023-11-12 02:10:04,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:10:04,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:10:04,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:10:04,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:10:04,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:10:04,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-12 02:10:04,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:10:04,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-12 02:10:04,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:10:04,297 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-12 02:10:04,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:10:04,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359013578] [2023-11-12 02:10:04,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359013578] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:10:04,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691293196] [2023-11-12 02:10:04,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:10:04,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:10:04,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:10:04,299 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:10:04,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-12 02:10:04,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:10:04,376 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-12 02:10:04,378 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:10:04,420 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-12 02:10:04,420 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:10:04,624 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-12 02:10:04,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691293196] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:10:04,625 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:10:04,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 15 [2023-11-12 02:10:04,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040582009] [2023-11-12 02:10:04,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:10:04,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-12 02:10:04,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:10:04,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-12 02:10:04,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2023-11-12 02:10:04,627 INFO L87 Difference]: Start difference. First operand 278 states and 391 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 11 states have internal predecessors, (40), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-12 02:10:04,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:10:04,976 INFO L93 Difference]: Finished difference Result 415 states and 588 transitions. [2023-11-12 02:10:04,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-12 02:10:04,977 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 11 states have internal predecessors, (40), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 47 [2023-11-12 02:10:04,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:10:04,980 INFO L225 Difference]: With dead ends: 415 [2023-11-12 02:10:04,980 INFO L226 Difference]: Without dead ends: 349 [2023-11-12 02:10:04,981 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2023-11-12 02:10:04,982 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 107 mSDsluCounter, 1175 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 1274 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 02:10:04,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 1274 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 02:10:04,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2023-11-12 02:10:05,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 317. [2023-11-12 02:10:05,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 249 states have (on average 1.3052208835341366) internal successors, (325), 259 states have internal predecessors, (325), 42 states have call successors, (42), 15 states have call predecessors, (42), 25 states have return successors, (72), 42 states have call predecessors, (72), 41 states have call successors, (72) [2023-11-12 02:10:05,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 439 transitions. [2023-11-12 02:10:05,013 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 439 transitions. Word has length 47 [2023-11-12 02:10:05,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:10:05,013 INFO L495 AbstractCegarLoop]: Abstraction has 317 states and 439 transitions. [2023-11-12 02:10:05,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 11 states have internal predecessors, (40), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-12 02:10:05,014 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 439 transitions. [2023-11-12 02:10:05,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-12 02:10:05,015 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:10:05,015 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:10:05,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-12 02:10:05,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-12 02:10:05,222 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:10:05,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:10:05,222 INFO L85 PathProgramCache]: Analyzing trace with hash -647082201, now seen corresponding path program 2 times [2023-11-12 02:10:05,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:10:05,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140969159] [2023-11-12 02:10:05,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:10:05,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:10:05,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:10:05,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:10:05,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:10:05,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-12 02:10:05,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:10:05,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-12 02:10:05,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:10:05,468 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-12 02:10:05,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:10:05,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140969159] [2023-11-12 02:10:05,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140969159] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:10:05,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326578113] [2023-11-12 02:10:05,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:10:05,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:10:05,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:10:05,471 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:10:05,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-12 02:10:05,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-12 02:10:05,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:10:05,578 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-12 02:10:05,580 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:10:05,803 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-12 02:10:05,803 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:10:05,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326578113] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:10:05,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:10:05,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2023-11-12 02:10:05,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549090822] [2023-11-12 02:10:05,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:10:05,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:10:05,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:10:05,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:10:05,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2023-11-12 02:10:05,806 INFO L87 Difference]: Start difference. First operand 317 states and 439 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-12 02:10:05,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:10:05,969 INFO L93 Difference]: Finished difference Result 335 states and 464 transitions. [2023-11-12 02:10:05,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 02:10:05,970 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 47 [2023-11-12 02:10:05,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:10:05,973 INFO L225 Difference]: With dead ends: 335 [2023-11-12 02:10:05,973 INFO L226 Difference]: Without dead ends: 333 [2023-11-12 02:10:05,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2023-11-12 02:10:05,974 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 88 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:10:05,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 443 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:10:05,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2023-11-12 02:10:06,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 321. [2023-11-12 02:10:06,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 252 states have (on average 1.3015873015873016) internal successors, (328), 262 states have internal predecessors, (328), 42 states have call successors, (42), 16 states have call predecessors, (42), 26 states have return successors, (72), 42 states have call predecessors, (72), 41 states have call successors, (72) [2023-11-12 02:10:06,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 442 transitions. [2023-11-12 02:10:06,010 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 442 transitions. Word has length 47 [2023-11-12 02:10:06,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:10:06,011 INFO L495 AbstractCegarLoop]: Abstraction has 321 states and 442 transitions. [2023-11-12 02:10:06,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-12 02:10:06,011 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 442 transitions. [2023-11-12 02:10:06,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-12 02:10:06,018 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:10:06,019 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 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 02:10:06,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-12 02:10:06,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-12 02:10:06,225 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:10:06,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:10:06,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1043708323, now seen corresponding path program 1 times [2023-11-12 02:10:06,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:10:06,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339800358] [2023-11-12 02:10:06,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:10:06,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:10:06,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:10:06,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:10:06,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:10:06,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-12 02:10:06,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:10:06,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-12 02:10:06,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:10:06,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-11-12 02:10:06,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:10:06,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-12 02:10:06,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:10:06,369 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-12 02:10:06,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:10:06,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339800358] [2023-11-12 02:10:06,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339800358] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:10:06,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978592134] [2023-11-12 02:10:06,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:10:06,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:10:06,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:10:06,371 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:10:06,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-12 02:10:06,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:10:06,447 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-12 02:10:06,449 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:10:06,573 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-12 02:10:06,574 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:10:06,974 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-12 02:10:06,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978592134] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:10:06,974 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:10:06,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 13, 10] total 21 [2023-11-12 02:10:06,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87193990] [2023-11-12 02:10:06,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:10:06,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-12 02:10:06,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:10:06,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-12 02:10:06,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2023-11-12 02:10:06,977 INFO L87 Difference]: Start difference. First operand 321 states and 442 transitions. Second operand has 21 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 states have internal predecessors, (58), 5 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (11), 7 states have call predecessors, (11), 4 states have call successors, (11) [2023-11-12 02:10:07,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:10:07,555 INFO L93 Difference]: Finished difference Result 424 states and 615 transitions. [2023-11-12 02:10:07,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-12 02:10:07,556 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 states have internal predecessors, (58), 5 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (11), 7 states have call predecessors, (11), 4 states have call successors, (11) Word has length 50 [2023-11-12 02:10:07,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:10:07,559 INFO L225 Difference]: With dead ends: 424 [2023-11-12 02:10:07,559 INFO L226 Difference]: Without dead ends: 386 [2023-11-12 02:10:07,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=170, Invalid=822, Unknown=0, NotChecked=0, Total=992 [2023-11-12 02:10:07,561 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 281 mSDsluCounter, 1255 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 1347 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 02:10:07,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [289 Valid, 1347 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 02:10:07,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2023-11-12 02:10:07,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 317. [2023-11-12 02:10:07,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 247 states have (on average 1.2995951417004048) internal successors, (321), 259 states have internal predecessors, (321), 43 states have call successors, (43), 14 states have call predecessors, (43), 26 states have return successors, (84), 43 states have call predecessors, (84), 42 states have call successors, (84) [2023-11-12 02:10:07,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 448 transitions. [2023-11-12 02:10:07,599 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 448 transitions. Word has length 50 [2023-11-12 02:10:07,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:10:07,600 INFO L495 AbstractCegarLoop]: Abstraction has 317 states and 448 transitions. [2023-11-12 02:10:07,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 states have internal predecessors, (58), 5 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (11), 7 states have call predecessors, (11), 4 states have call successors, (11) [2023-11-12 02:10:07,600 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 448 transitions. [2023-11-12 02:10:07,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-12 02:10:07,601 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:10:07,602 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 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 02:10:07,610 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-12 02:10:07,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:10:07,808 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:10:07,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:10:07,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1461924550, now seen corresponding path program 1 times [2023-11-12 02:10:07,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:10:07,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124879655] [2023-11-12 02:10:07,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:10:07,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:10:07,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:10:07,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:10:07,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:10:07,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-12 02:10:07,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:10:08,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-12 02:10:08,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:10:08,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-11-12 02:10:08,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:10:08,029 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-12 02:10:08,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:10:08,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124879655] [2023-11-12 02:10:08,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124879655] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:10:08,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719094124] [2023-11-12 02:10:08,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:10:08,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:10:08,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:10:08,031 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:10:08,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-12 02:10:08,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:10:08,106 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-12 02:10:08,107 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:10:08,240 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-12 02:10:08,240 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:10:08,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719094124] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:10:08,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:10:08,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [9] total 14 [2023-11-12 02:10:08,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377419936] [2023-11-12 02:10:08,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:10:08,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-12 02:10:08,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:10:08,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-12 02:10:08,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2023-11-12 02:10:08,242 INFO L87 Difference]: Start difference. First operand 317 states and 448 transitions. Second operand has 11 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-12 02:10:08,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:10:08,449 INFO L93 Difference]: Finished difference Result 406 states and 569 transitions. [2023-11-12 02:10:08,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-12 02:10:08,450 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 50 [2023-11-12 02:10:08,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:10:08,453 INFO L225 Difference]: With dead ends: 406 [2023-11-12 02:10:08,453 INFO L226 Difference]: Without dead ends: 333 [2023-11-12 02:10:08,454 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2023-11-12 02:10:08,455 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 83 mSDsluCounter, 895 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 1039 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:10:08,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 1039 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:10:08,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2023-11-12 02:10:08,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 317. [2023-11-12 02:10:08,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 247 states have (on average 1.291497975708502) internal successors, (319), 259 states have internal predecessors, (319), 43 states have call successors, (43), 14 states have call predecessors, (43), 26 states have return successors, (84), 43 states have call predecessors, (84), 42 states have call successors, (84) [2023-11-12 02:10:08,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 446 transitions. [2023-11-12 02:10:08,489 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 446 transitions. Word has length 50 [2023-11-12 02:10:08,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:10:08,489 INFO L495 AbstractCegarLoop]: Abstraction has 317 states and 446 transitions. [2023-11-12 02:10:08,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-12 02:10:08,490 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 446 transitions. [2023-11-12 02:10:08,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-12 02:10:08,491 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:10:08,491 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 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 02:10:08,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-12 02:10:08,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-12 02:10:08,698 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:10:08,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:10:08,699 INFO L85 PathProgramCache]: Analyzing trace with hash 511007402, now seen corresponding path program 1 times [2023-11-12 02:10:08,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:10:08,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838290056] [2023-11-12 02:10:08,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:10:08,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:10:08,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:10:09,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:10:09,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:10:09,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-12 02:10:09,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:10:09,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-12 02:10:09,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:10:09,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2023-11-12 02:10:09,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:10:09,484 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-12 02:10:09,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:10:09,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838290056] [2023-11-12 02:10:09,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838290056] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:10:09,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:10:09,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2023-11-12 02:10:09,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920667386] [2023-11-12 02:10:09,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:10:09,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-12 02:10:09,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:10:09,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-12 02:10:09,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2023-11-12 02:10:09,487 INFO L87 Difference]: Start difference. First operand 317 states and 446 transitions. Second operand has 15 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-12 02:10:10,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:10:10,025 INFO L93 Difference]: Finished difference Result 418 states and 582 transitions. [2023-11-12 02:10:10,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-12 02:10:10,026 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 51 [2023-11-12 02:10:10,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:10:10,028 INFO L225 Difference]: With dead ends: 418 [2023-11-12 02:10:10,029 INFO L226 Difference]: Without dead ends: 353 [2023-11-12 02:10:10,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2023-11-12 02:10:10,030 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 155 mSDsluCounter, 1224 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 1343 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 02:10:10,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 1343 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 02:10:10,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2023-11-12 02:10:10,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 329. [2023-11-12 02:10:10,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 256 states have (on average 1.28125) internal successors, (328), 268 states have internal predecessors, (328), 45 states have call successors, (45), 15 states have call predecessors, (45), 27 states have return successors, (86), 45 states have call predecessors, (86), 44 states have call successors, (86) [2023-11-12 02:10:10,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 459 transitions. [2023-11-12 02:10:10,068 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 459 transitions. Word has length 51 [2023-11-12 02:10:10,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:10:10,069 INFO L495 AbstractCegarLoop]: Abstraction has 329 states and 459 transitions. [2023-11-12 02:10:10,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-12 02:10:10,069 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 459 transitions. [2023-11-12 02:10:10,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-12 02:10:10,071 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:10:10,071 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:10:10,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-12 02:10:10,072 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:10:10,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:10:10,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1296388867, now seen corresponding path program 1 times [2023-11-12 02:10:10,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:10:10,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894536788] [2023-11-12 02:10:10,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:10:10,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:10:10,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:10:10,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:10:10,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:10:10,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-12 02:10:10,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:10:10,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-12 02:10:10,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:10:10,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-11-12 02:10:10,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:10:10,267 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-12 02:10:10,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:10:10,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894536788] [2023-11-12 02:10:10,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894536788] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:10:10,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135668419] [2023-11-12 02:10:10,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:10:10,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:10:10,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:10:10,277 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:10:10,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-12 02:10:10,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:10:10,387 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-12 02:10:10,389 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:10:10,437 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-12 02:10:10,437 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:10:10,571 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-12 02:10:10,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135668419] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:10:10,572 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:10:10,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-11-12 02:10:10,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982864474] [2023-11-12 02:10:10,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:10:10,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-12 02:10:10,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:10:10,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-12 02:10:10,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2023-11-12 02:10:10,576 INFO L87 Difference]: Start difference. First operand 329 states and 459 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 12 states have internal predecessors, (47), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-12 02:10:10,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:10:10,924 INFO L93 Difference]: Finished difference Result 479 states and 678 transitions. [2023-11-12 02:10:10,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-12 02:10:10,925 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 12 states have internal predecessors, (47), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) Word has length 53 [2023-11-12 02:10:10,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:10:10,928 INFO L225 Difference]: With dead ends: 479 [2023-11-12 02:10:10,928 INFO L226 Difference]: Without dead ends: 376 [2023-11-12 02:10:10,929 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 105 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2023-11-12 02:10:10,931 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 126 mSDsluCounter, 1043 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 1170 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 02:10:10,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 1170 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 02:10:10,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2023-11-12 02:10:10,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 329. [2023-11-12 02:10:11,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 256 states have (on average 1.27734375) internal successors, (327), 268 states have internal predecessors, (327), 45 states have call successors, (45), 15 states have call predecessors, (45), 27 states have return successors, (86), 45 states have call predecessors, (86), 44 states have call successors, (86) [2023-11-12 02:10:11,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 458 transitions. [2023-11-12 02:10:11,004 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 458 transitions. Word has length 53 [2023-11-12 02:10:11,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:10:11,004 INFO L495 AbstractCegarLoop]: Abstraction has 329 states and 458 transitions. [2023-11-12 02:10:11,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 12 states have internal predecessors, (47), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-12 02:10:11,005 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 458 transitions. [2023-11-12 02:10:11,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-12 02:10:11,006 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:10:11,006 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:10:11,013 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-12 02:10:11,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:10:11,212 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:10:11,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:10:11,213 INFO L85 PathProgramCache]: Analyzing trace with hash -390298426, now seen corresponding path program 1 times [2023-11-12 02:10:11,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:10:11,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715300622] [2023-11-12 02:10:11,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:10:11,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:10:11,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:10:11,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:10:11,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:10:11,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-12 02:10:11,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:10:11,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-12 02:10:11,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:10:11,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-12 02:10:11,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:10:11,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-11-12 02:10:11,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:10:11,501 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-12 02:10:11,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:10:11,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715300622] [2023-11-12 02:10:11,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715300622] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:10:11,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955987329] [2023-11-12 02:10:11,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:10:11,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:10:11,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:10:11,503 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:10:11,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-12 02:10:11,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:10:11,576 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-12 02:10:11,578 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:10:11,620 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-12 02:10:11,620 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:10:12,060 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-12 02:10:12,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955987329] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:10:12,061 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:10:12,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2023-11-12 02:10:12,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438666029] [2023-11-12 02:10:12,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:10:12,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-12 02:10:12,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:10:12,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-12 02:10:12,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2023-11-12 02:10:12,063 INFO L87 Difference]: Start difference. First operand 329 states and 458 transitions. Second operand has 25 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 21 states have internal predecessors, (53), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-12 02:10:12,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:10:12,992 INFO L93 Difference]: Finished difference Result 395 states and 564 transitions. [2023-11-12 02:10:12,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-12 02:10:12,993 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 21 states have internal predecessors, (53), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 54 [2023-11-12 02:10:12,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:10:12,997 INFO L225 Difference]: With dead ends: 395 [2023-11-12 02:10:12,998 INFO L226 Difference]: Without dead ends: 363 [2023-11-12 02:10:12,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=184, Invalid=1298, Unknown=0, NotChecked=0, Total=1482 [2023-11-12 02:10:13,001 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 238 mSDsluCounter, 2032 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 2156 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 02:10:13,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 2156 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 565 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 02:10:13,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2023-11-12 02:10:13,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 315. [2023-11-12 02:10:13,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 246 states have (on average 1.2886178861788617) internal successors, (317), 257 states have internal predecessors, (317), 43 states have call successors, (43), 13 states have call predecessors, (43), 25 states have return successors, (81), 44 states have call predecessors, (81), 42 states have call successors, (81) [2023-11-12 02:10:13,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 441 transitions. [2023-11-12 02:10:13,039 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 441 transitions. Word has length 54 [2023-11-12 02:10:13,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:10:13,039 INFO L495 AbstractCegarLoop]: Abstraction has 315 states and 441 transitions. [2023-11-12 02:10:13,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 21 states have internal predecessors, (53), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-12 02:10:13,039 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 441 transitions. [2023-11-12 02:10:13,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-12 02:10:13,041 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:10:13,041 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:10:13,052 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-12 02:10:13,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:10:13,253 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:10:13,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:10:13,253 INFO L85 PathProgramCache]: Analyzing trace with hash -368441586, now seen corresponding path program 2 times [2023-11-12 02:10:13,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:10:13,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125639703] [2023-11-12 02:10:13,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:10:13,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:10:13,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:10:13,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:10:13,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:10:13,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-12 02:10:13,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:10:13,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-11-12 02:10:13,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:10:13,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-12 02:10:13,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:10:13,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-11-12 02:10:13,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:10:13,512 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-12 02:10:13,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:10:13,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125639703] [2023-11-12 02:10:13,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125639703] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:10:13,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775276051] [2023-11-12 02:10:13,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:10:13,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:10:13,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:10:13,515 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:10:13,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-12 02:10:13,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:10:13,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:10:13,598 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-12 02:10:13,599 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:10:13,639 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-12 02:10:13,639 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:10:14,037 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-12 02:10:14,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775276051] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:10:14,037 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:10:14,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2023-11-12 02:10:14,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050053855] [2023-11-12 02:10:14,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:10:14,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-12 02:10:14,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:10:14,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-12 02:10:14,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2023-11-12 02:10:14,039 INFO L87 Difference]: Start difference. First operand 315 states and 441 transitions. Second operand has 25 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 21 states have internal predecessors, (53), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-12 02:10:14,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:10:14,843 INFO L93 Difference]: Finished difference Result 384 states and 553 transitions. [2023-11-12 02:10:14,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-12 02:10:14,846 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 21 states have internal predecessors, (53), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 54 [2023-11-12 02:10:14,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:10:14,849 INFO L225 Difference]: With dead ends: 384 [2023-11-12 02:10:14,849 INFO L226 Difference]: Without dead ends: 351 [2023-11-12 02:10:14,851 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=199, Invalid=1361, Unknown=0, NotChecked=0, Total=1560 [2023-11-12 02:10:14,856 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 210 mSDsluCounter, 1885 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 2006 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 02:10:14,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 2006 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 02:10:14,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2023-11-12 02:10:14,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 274. [2023-11-12 02:10:14,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 215 states have (on average 1.2976744186046512) internal successors, (279), 225 states have internal predecessors, (279), 36 states have call successors, (36), 11 states have call predecessors, (36), 22 states have return successors, (63), 37 states have call predecessors, (63), 35 states have call successors, (63) [2023-11-12 02:10:14,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 378 transitions. [2023-11-12 02:10:14,891 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 378 transitions. Word has length 54 [2023-11-12 02:10:14,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:10:14,891 INFO L495 AbstractCegarLoop]: Abstraction has 274 states and 378 transitions. [2023-11-12 02:10:14,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 21 states have internal predecessors, (53), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-12 02:10:14,892 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 378 transitions. [2023-11-12 02:10:14,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-12 02:10:14,893 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:10:14,893 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:10:14,904 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-12 02:10:15,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:10:15,100 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:10:15,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:10:15,101 INFO L85 PathProgramCache]: Analyzing trace with hash 509573649, now seen corresponding path program 1 times [2023-11-12 02:10:15,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:10:15,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751384301] [2023-11-12 02:10:15,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:10:15,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:10:15,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:10:15,150 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-12 02:10:15,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:10:15,232 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-12 02:10:15,233 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-12 02:10:15,236 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-11-12 02:10:15,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-11-12 02:10:15,241 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:10:15,245 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-11-12 02:10:15,280 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret20 could not be translated [2023-11-12 02:10:15,284 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~nondet4 could not be translated [2023-11-12 02:10:15,285 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~nondet5 could not be translated [2023-11-12 02:10:15,287 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret21 could not be translated [2023-11-12 02:10:15,289 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret22 could not be translated [2023-11-12 02:10:15,295 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~nondet6 could not be translated [2023-11-12 02:10:15,301 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~nondet7 could not be translated [2023-11-12 02:10:15,315 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.11 02:10:15 BoogieIcfgContainer [2023-11-12 02:10:15,315 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-12 02:10:15,316 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-12 02:10:15,316 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-12 02:10:15,316 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-12 02:10:15,317 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:09:45" (3/4) ... [2023-11-12 02:10:15,319 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-11-12 02:10:15,320 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-12 02:10:15,321 INFO L158 Benchmark]: Toolchain (without parser) took 31024.63ms. Allocated memory was 172.0MB in the beginning and 226.5MB in the end (delta: 54.5MB). Free memory was 124.8MB in the beginning and 67.5MB in the end (delta: 57.3MB). Peak memory consumption was 113.0MB. Max. memory is 16.1GB. [2023-11-12 02:10:15,321 INFO L158 Benchmark]: CDTParser took 0.35ms. Allocated memory is still 117.4MB. Free memory is still 68.4MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-12 02:10:15,322 INFO L158 Benchmark]: CACSL2BoogieTranslator took 420.93ms. Allocated memory is still 172.0MB. Free memory was 124.8MB in the beginning and 111.5MB in the end (delta: 13.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-11-12 02:10:15,322 INFO L158 Benchmark]: Boogie Procedure Inliner took 59.52ms. Allocated memory is still 172.0MB. Free memory was 111.5MB in the beginning and 110.1MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-12 02:10:15,323 INFO L158 Benchmark]: Boogie Preprocessor took 78.09ms. Allocated memory is still 172.0MB. Free memory was 110.1MB in the beginning and 108.6MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-12 02:10:15,323 INFO L158 Benchmark]: RCFGBuilder took 747.97ms. Allocated memory is still 172.0MB. Free memory was 108.6MB in the beginning and 90.6MB in the end (delta: 17.9MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2023-11-12 02:10:15,323 INFO L158 Benchmark]: TraceAbstraction took 29705.01ms. Allocated memory was 172.0MB in the beginning and 226.5MB in the end (delta: 54.5MB). Free memory was 89.7MB in the beginning and 67.5MB in the end (delta: 22.2MB). Peak memory consumption was 77.3MB. Max. memory is 16.1GB. [2023-11-12 02:10:15,324 INFO L158 Benchmark]: Witness Printer took 4.27ms. Allocated memory is still 226.5MB. Free memory is still 67.5MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-12 02:10:15,331 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35ms. Allocated memory is still 117.4MB. Free memory is still 68.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 420.93ms. Allocated memory is still 172.0MB. Free memory was 124.8MB in the beginning and 111.5MB in the end (delta: 13.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 59.52ms. Allocated memory is still 172.0MB. Free memory was 111.5MB in the beginning and 110.1MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 78.09ms. Allocated memory is still 172.0MB. Free memory was 110.1MB in the beginning and 108.6MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 747.97ms. Allocated memory is still 172.0MB. Free memory was 108.6MB in the beginning and 90.6MB in the end (delta: 17.9MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 29705.01ms. Allocated memory was 172.0MB in the beginning and 226.5MB in the end (delta: 54.5MB). Free memory was 89.7MB in the beginning and 67.5MB in the end (delta: 22.2MB). Peak memory consumption was 77.3MB. Max. memory is 16.1GB. * Witness Printer took 4.27ms. Allocated memory is still 226.5MB. Free memory is still 67.5MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret20 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~nondet4 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~nondet5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret21 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret22 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~nondet6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~nondet7 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 17]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: overapproximation of bitwiseOr at line 110, overapproximation of bitwiseAnd at line 76. Possible FailurePath: [L226] unsigned int a ; [L227] unsigned int ma = __VERIFIER_nondet_uint(); [L228] signed char ea = __VERIFIER_nondet_char(); [L229] unsigned int b ; [L230] unsigned int mb = __VERIFIER_nondet_uint(); [L231] signed char eb = __VERIFIER_nondet_char(); [L232] unsigned int r_add1 ; [L233] unsigned int r_add2 ; [L234] unsigned int zero ; [L235] int tmp ; [L236] int tmp___0 ; [L237] int __retres14 ; VAL [ea=-127, eb=127] [L241] CALL, EXPR base2flt(0, 0) VAL [\old(e)=0, \old(m)=0] [L25] unsigned int res ; [L26] unsigned int __retres4 ; VAL [\old(e)=0, \old(m)=0, e=0, m=0] [L29] COND TRUE ! m [L30] __retres4 = 0U VAL [\old(e)=0, \old(m)=0, __retres4=0, e=0, m=0] [L80] return (__retres4); VAL [\old(e)=0, \old(m)=0, \result=0, __retres4=0, e=0, m=0] [L241] RET, EXPR base2flt(0, 0) VAL [ea=-127, eb=127] [L241] zero = base2flt(0, 0) [L242] CALL, EXPR base2flt(ma, ea) VAL [\old(e)=-127, \old(m)=16777216] [L25] unsigned int res ; [L26] unsigned int __retres4 ; VAL [\old(e)=-127, \old(m)=16777216, e=-127, m=16777216] [L29] COND FALSE !(! m) VAL [\old(e)=-127, \old(m)=16777216, e=-127, m=16777216] [L35] COND FALSE !(m < 1U << 24U) VAL [\old(e)=-127, \old(m)=16777216, e=-127, m=16777216] [L57] COND TRUE 1 VAL [\old(e)=-127, \old(m)=16777216, e=-127, m=16777216] [L59] COND FALSE !(m >= 1U << 25U) VAL [\old(e)=-127, \old(m)=16777216, e=-127, m=16777216] [L76] EXPR m & ~ (1U << 24U) VAL [\old(e)=-127, \old(m)=16777216, e=-127, m=16777216] [L76] m = m & ~ (1U << 24U) [L77] EXPR m | ((unsigned int )(e + 128) << 24U) VAL [\old(e)=-127, \old(m)=16777216, e=-127, m=16777216] [L77] res = m | ((unsigned int )(e + 128) << 24U) [L78] __retres4 = res VAL [\old(e)=-127, \old(m)=16777216, __retres4=16777216, e=-127, m=16777216, res=16777216] [L80] return (__retres4); VAL [\old(e)=-127, \old(m)=16777216, \result=16777216, __retres4=16777216, e=-127, m=16777216, res=16777216] [L242] RET, EXPR base2flt(ma, ea) VAL [ea=-127, eb=127, ma=16777216, zero=0] [L242] a = base2flt(ma, ea) [L243] CALL, EXPR base2flt(mb, eb) VAL [\old(e)=127, \old(m)=33554432] [L25] unsigned int res ; [L26] unsigned int __retres4 ; VAL [\old(e)=127, \old(m)=33554432, e=127, m=33554432] [L29] COND FALSE !(! m) VAL [\old(e)=127, \old(m)=33554432, e=127, m=33554432] [L35] COND FALSE !(m < 1U << 24U) VAL [\old(e)=127, \old(m)=33554432, e=127, m=33554432] [L57] COND TRUE 1 VAL [\old(e)=127, \old(m)=33554432, e=127, m=33554432] [L59] COND TRUE m >= 1U << 25U VAL [\old(e)=127, \old(m)=33554432, e=127, m=33554432] [L64] COND TRUE e >= 127 [L65] __retres4 = 4294967295U VAL [\old(e)=127, \old(m)=33554432, __retres4=4294967295, e=127, m=33554432] [L80] return (__retres4); VAL [\old(e)=127, \old(m)=33554432, \result=4294967295, __retres4=4294967295, e=127, m=33554432] [L243] RET, EXPR base2flt(mb, eb) VAL [a=16777216, ea=-127, eb=127, ma=16777216, mb=33554432, zero=0] [L243] b = base2flt(mb, eb) [L244] CALL addflt(a, b) VAL [\old(a)=16777216, \old(b)=4294967295] [L84] unsigned int res ; [L85] unsigned int ma ; [L86] unsigned int mb ; [L87] unsigned int delta ; [L88] int ea ; [L89] int eb ; [L90] unsigned int tmp ; [L91] unsigned int __retres10 ; VAL [\old(a)=16777216, \old(b)=4294967295, a=16777216, b=4294967295] [L94] COND TRUE a < b [L95] tmp = a [L96] a = b [L97] b = tmp VAL [\old(a)=16777216, \old(b)=4294967295, a=4294967295, b=16777216, tmp=16777216] [L101] COND FALSE !(! b) [L108] ma = a & ((1U << 24U) - 1U) [L109] ea = (int )(a >> 24U) - 128 VAL [\old(a)=16777216, \old(b)=4294967295, a=4294967295, b=16777216, ea=127, ma=16777215, tmp=16777216] [L110] EXPR ma | (1U << 24U) VAL [\old(a)=16777216, \old(b)=4294967295, a=4294967295, b=16777216, ea=127, ma=16777215, tmp=16777216] [L110] ma = ma | (1U << 24U) [L111] mb = b & ((1U << 24U) - 1U) [L112] eb = (int )(b >> 24U) - 128 VAL [\old(a)=16777216, \old(b)=4294967295, a=4294967295, b=16777216, ea=127, eb=-127, ma=33554431, mb=0, tmp=16777216] [L113] EXPR mb | (1U << 24U) VAL [\old(a)=16777216, \old(b)=4294967295, a=4294967295, b=16777216, ea=127, eb=-127, ma=33554431, mb=0, tmp=16777216] [L113] mb = mb | (1U << 24U) [L114] CALL __VERIFIER_assert(ea >= eb) VAL [\old(cond)=1] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1] [L114] RET __VERIFIER_assert(ea >= eb) VAL [\old(a)=16777216, \old(b)=4294967295, a=4294967295, b=16777216, ea=127, eb=-127, ma=33554431, mb=16777216, tmp=16777216] [L115] delta = ea - eb VAL [\old(a)=16777216, \old(b)=4294967295, a=4294967295, b=16777216, delta=254, ea=127, eb=-127, ma=33554431, mb=16777216, tmp=16777216] [L116] CALL __VERIFIER_assert(delta < sizeof(mb) * 8) VAL [\old(cond)=0] [L16] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L17] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 71 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 29.5s, OverallIterations: 23, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.1s, AutomataDifference: 11.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2918 SdHoareTripleChecker+Valid, 5.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2782 mSDsluCounter, 28120 SdHoareTripleChecker+Invalid, 5.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 25590 mSDsCounter, 389 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 6072 IncrementalHoareTripleChecker+Invalid, 6461 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 389 mSolverCounterUnsat, 2530 mSDtfsCounter, 6072 mSolverCounterSat, 0.3s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1681 GetRequests, 1214 SyntacticMatches, 7 SemanticMatches, 460 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2013 ImplicationChecksByTransitivity, 8.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=329occurred in iteration=19, InterpolantAutomatonStates: 331, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.8s AutomataMinimizationTime, 22 MinimizatonAttempts, 855 StatesRemovedByMinimization, 21 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 11.2s InterpolantComputationTime, 1787 NumberOfCodeBlocks, 1751 NumberOfCodeBlocksAsserted, 40 NumberOfCheckSat, 2119 ConstructedInterpolants, 1 QuantifiedInterpolants, 4443 SizeOfPredicates, 67 NumberOfNonLiveVariables, 2131 ConjunctsInSsa, 327 ConjunctsInUnsatCore, 46 InterpolantComputations, 13 PerfectInterpolantSequences, 734/886 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2023-11-12 02:10:15,367 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/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_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/bitvector/soft_float_4-3a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/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 c7e459611ed6ff9d4c49aa04980ca7f1d5aaaf97e8fc0116c264955df4ed453a --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:10:18,020 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:10:18,162 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2023-11-12 02:10:18,170 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:10:18,171 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:10:18,218 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:10:18,218 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:10:18,219 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:10:18,220 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:10:18,225 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:10:18,226 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:10:18,227 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:10:18,227 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:10:18,230 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:10:18,230 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:10:18,231 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:10:18,231 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:10:18,232 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:10:18,232 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:10:18,234 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:10:18,234 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:10:18,235 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-12 02:10:18,236 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-12 02:10:18,236 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-12 02:10:18,237 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:10:18,237 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:10:18,238 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:10:18,239 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:10:18,239 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:10:18,240 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:10:18,241 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:10:18,242 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:10:18,242 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:10:18,243 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:10:18,243 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-11-12 02:10:18,243 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-12 02:10:18,244 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:10:18,244 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:10:18,244 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:10:18,245 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:10:18,246 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-11-12 02:10:18,246 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:10:18,247 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_33980733-eed6-4918-82a6-c37d97446ba7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c7e459611ed6ff9d4c49aa04980ca7f1d5aaaf97e8fc0116c264955df4ed453a [2023-11-12 02:10:18,684 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:10:18,720 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:10:18,722 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:10:18,724 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:10:18,724 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:10:18,726 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/bitvector/soft_float_4-3a.c.cil.c [2023-11-12 02:10:21,906 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:10:22,206 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:10:22,208 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/sv-benchmarks/c/bitvector/soft_float_4-3a.c.cil.c [2023-11-12 02:10:22,228 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/data/734f182c8/da5eb6e3babd4237aee9808faf2a5a72/FLAG05b7e0abc [2023-11-12 02:10:22,247 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/data/734f182c8/da5eb6e3babd4237aee9808faf2a5a72 [2023-11-12 02:10:22,253 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:10:22,255 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:10:22,259 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:10:22,259 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:10:22,264 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:10:22,265 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:10:22" (1/1) ... [2023-11-12 02:10:22,266 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@270e6b79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:10:22, skipping insertion in model container [2023-11-12 02:10:22,267 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:10:22" (1/1) ... [2023-11-12 02:10:22,321 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:10:22,505 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_33980733-eed6-4918-82a6-c37d97446ba7/sv-benchmarks/c/bitvector/soft_float_4-3a.c.cil.c[730,743] [2023-11-12 02:10:22,591 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:10:22,613 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:10:22,630 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_33980733-eed6-4918-82a6-c37d97446ba7/sv-benchmarks/c/bitvector/soft_float_4-3a.c.cil.c[730,743] [2023-11-12 02:10:22,675 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:10:22,699 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:10:22,700 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:10:22 WrapperNode [2023-11-12 02:10:22,700 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:10:22,701 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:10:22,701 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:10:22,702 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:10:22,710 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:10:22" (1/1) ... [2023-11-12 02:10:22,721 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:10:22" (1/1) ... [2023-11-12 02:10:22,740 INFO L138 Inliner]: procedures = 17, calls = 18, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 54 [2023-11-12 02:10:22,740 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:10:22,741 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:10:22,741 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:10:22,742 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:10:22,751 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:10:22" (1/1) ... [2023-11-12 02:10:22,751 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:10:22" (1/1) ... [2023-11-12 02:10:22,756 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:10:22" (1/1) ... [2023-11-12 02:10:22,756 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:10:22" (1/1) ... [2023-11-12 02:10:22,765 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:10:22" (1/1) ... [2023-11-12 02:10:22,771 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:10:22" (1/1) ... [2023-11-12 02:10:22,781 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:10:22" (1/1) ... [2023-11-12 02:10:22,783 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:10:22" (1/1) ... [2023-11-12 02:10:22,787 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:10:22,788 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:10:22,788 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:10:22,788 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:10:22,789 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:10:22" (1/1) ... [2023-11-12 02:10:22,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:10:22,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:10:22,835 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:10:22,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:10:22,866 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:10:22,867 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-11-12 02:10:22,867 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2023-11-12 02:10:22,867 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2023-11-12 02:10:22,867 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:10:22,867 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:10:22,867 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2023-11-12 02:10:22,867 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2023-11-12 02:10:22,867 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-12 02:10:22,868 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-12 02:10:22,951 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:10:22,953 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:10:23,302 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:10:23,315 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:10:23,315 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-12 02:10:23,317 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:10:23 BoogieIcfgContainer [2023-11-12 02:10:23,317 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:10:23,321 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:10:23,321 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:10:23,324 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:10:23,325 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:10:22" (1/3) ... [2023-11-12 02:10:23,326 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44a99dc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:10:23, skipping insertion in model container [2023-11-12 02:10:23,327 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:10:22" (2/3) ... [2023-11-12 02:10:23,327 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44a99dc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:10:23, skipping insertion in model container [2023-11-12 02:10:23,327 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:10:23" (3/3) ... [2023-11-12 02:10:23,329 INFO L112 eAbstractionObserver]: Analyzing ICFG soft_float_4-3a.c.cil.c [2023-11-12 02:10:23,349 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:10:23,350 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 02:10:23,412 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:10:23,419 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;@7cd3f4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:10:23,420 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 02:10:23,426 INFO L276 IsEmpty]: Start isEmpty. Operand has 54 states, 40 states have (on average 1.475) internal successors, (59), 41 states have internal predecessors, (59), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-12 02:10:23,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-12 02:10:23,438 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:10:23,439 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:10:23,439 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:10:23,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:10:23,446 INFO L85 PathProgramCache]: Analyzing trace with hash 173410466, now seen corresponding path program 1 times [2023-11-12 02:10:23,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-12 02:10:23,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1623117628] [2023-11-12 02:10:23,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:10:23,460 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-12 02:10:23,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/mathsat [2023-11-12 02:10:23,472 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-12 02:10:23,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-11-12 02:10:23,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:10:23,641 INFO L262 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 02:10:23,652 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:10:23,845 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-12 02:10:23,846 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:10:23,847 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-12 02:10:23,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1623117628] [2023-11-12 02:10:23,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1623117628] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:10:23,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:10:23,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-12 02:10:23,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786634121] [2023-11-12 02:10:23,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:10:23,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 02:10:23,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-12 02:10:23,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 02:10:23,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:10:23,903 INFO L87 Difference]: Start difference. First operand has 54 states, 40 states have (on average 1.475) internal successors, (59), 41 states have internal predecessors, (59), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-12 02:10:24,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:10:24,109 INFO L93 Difference]: Finished difference Result 128 states and 195 transitions. [2023-11-12 02:10:24,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 02:10:24,112 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 31 [2023-11-12 02:10:24,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:10:24,122 INFO L225 Difference]: With dead ends: 128 [2023-11-12 02:10:24,122 INFO L226 Difference]: Without dead ends: 71 [2023-11-12 02:10:24,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-11-12 02:10:24,130 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 21 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:10:24,132 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 452 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:10:24,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-11-12 02:10:24,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 61. [2023-11-12 02:10:24,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 45 states have (on average 1.3111111111111111) internal successors, (59), 47 states have internal predecessors, (59), 10 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2023-11-12 02:10:24,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 81 transitions. [2023-11-12 02:10:24,196 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 81 transitions. Word has length 31 [2023-11-12 02:10:24,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:10:24,197 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 81 transitions. [2023-11-12 02:10:24,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-12 02:10:24,197 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 81 transitions. [2023-11-12 02:10:24,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-12 02:10:24,200 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:10:24,200 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 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 02:10:24,213 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-11-12 02:10:24,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-12 02:10:24,412 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:10:24,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:10:24,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1707598935, now seen corresponding path program 1 times [2023-11-12 02:10:24,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-12 02:10:24,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1865580269] [2023-11-12 02:10:24,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:10:24,415 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-12 02:10:24,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/mathsat [2023-11-12 02:10:24,416 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-12 02:10:24,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-11-12 02:10:24,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:10:24,486 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-12 02:10:24,489 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:10:24,581 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-12 02:10:24,581 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:10:24,669 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-12 02:10:24,669 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-12 02:10:24,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1865580269] [2023-11-12 02:10:24,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1865580269] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:10:24,670 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:10:24,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2023-11-12 02:10:24,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945746947] [2023-11-12 02:10:24,671 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:10:24,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-12 02:10:24,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-12 02:10:24,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-12 02:10:24,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-12 02:10:24,674 INFO L87 Difference]: Start difference. First operand 61 states and 81 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-12 02:10:24,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:10:24,827 INFO L93 Difference]: Finished difference Result 121 states and 161 transitions. [2023-11-12 02:10:24,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-12 02:10:24,828 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2023-11-12 02:10:24,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:10:24,833 INFO L225 Difference]: With dead ends: 121 [2023-11-12 02:10:24,834 INFO L226 Difference]: Without dead ends: 93 [2023-11-12 02:10:24,835 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2023-11-12 02:10:24,838 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 27 mSDsluCounter, 425 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:10:24,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 487 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:10:24,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2023-11-12 02:10:24,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 71. [2023-11-12 02:10:24,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 54 states have internal predecessors, (67), 12 states have call successors, (12), 5 states have call predecessors, (12), 6 states have return successors, (15), 11 states have call predecessors, (15), 11 states have call successors, (15) [2023-11-12 02:10:24,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 94 transitions. [2023-11-12 02:10:24,868 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 94 transitions. Word has length 35 [2023-11-12 02:10:24,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:10:24,869 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 94 transitions. [2023-11-12 02:10:24,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-12 02:10:24,870 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 94 transitions. [2023-11-12 02:10:24,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-12 02:10:24,875 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:10:24,875 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 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 02:10:24,892 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-11-12 02:10:25,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-12 02:10:25,089 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:10:25,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:10:25,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1508244029, now seen corresponding path program 1 times [2023-11-12 02:10:25,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-12 02:10:25,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2133698567] [2023-11-12 02:10:25,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:10:25,091 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-12 02:10:25,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/mathsat [2023-11-12 02:10:25,093 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-12 02:10:25,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-11-12 02:10:25,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:10:25,158 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 02:10:25,161 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:10:25,230 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-12 02:10:25,230 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:10:25,313 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-12 02:10:25,314 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-12 02:10:25,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2133698567] [2023-11-12 02:10:25,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2133698567] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:10:25,314 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:10:25,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2023-11-12 02:10:25,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659459137] [2023-11-12 02:10:25,315 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:10:25,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 02:10:25,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-12 02:10:25,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 02:10:25,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:10:25,317 INFO L87 Difference]: Start difference. First operand 71 states and 94 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 6 states have internal predecessors, (24), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-12 02:10:25,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:10:25,429 INFO L93 Difference]: Finished difference Result 113 states and 150 transitions. [2023-11-12 02:10:25,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 02:10:25,430 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 6 states have internal predecessors, (24), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 39 [2023-11-12 02:10:25,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:10:25,436 INFO L225 Difference]: With dead ends: 113 [2023-11-12 02:10:25,436 INFO L226 Difference]: Without dead ends: 89 [2023-11-12 02:10:25,440 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-11-12 02:10:25,444 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 16 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:10:25,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 451 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:10:25,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-11-12 02:10:25,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 81. [2023-11-12 02:10:25,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 59 states have (on average 1.2542372881355932) internal successors, (74), 61 states have internal predecessors, (74), 14 states have call successors, (14), 6 states have call predecessors, (14), 7 states have return successors, (17), 13 states have call predecessors, (17), 13 states have call successors, (17) [2023-11-12 02:10:25,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 105 transitions. [2023-11-12 02:10:25,467 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 105 transitions. Word has length 39 [2023-11-12 02:10:25,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:10:25,468 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 105 transitions. [2023-11-12 02:10:25,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 6 states have internal predecessors, (24), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-12 02:10:25,468 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 105 transitions. [2023-11-12 02:10:25,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-12 02:10:25,470 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:10:25,470 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:10:25,486 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-11-12 02:10:25,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-12 02:10:25,682 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:10:25,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:10:25,683 INFO L85 PathProgramCache]: Analyzing trace with hash -54729342, now seen corresponding path program 2 times [2023-11-12 02:10:25,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-12 02:10:25,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [455887277] [2023-11-12 02:10:25,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:10:25,684 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-12 02:10:25,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/mathsat [2023-11-12 02:10:25,737 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-12 02:10:25,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-11-12 02:10:25,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-12 02:10:25,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:10:25,789 INFO L262 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-12 02:10:25,792 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:10:25,943 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-11-12 02:10:25,943 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:10:25,944 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-12 02:10:25,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [455887277] [2023-11-12 02:10:25,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [455887277] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:10:25,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:10:25,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 02:10:25,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296941821] [2023-11-12 02:10:25,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:10:25,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 02:10:25,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-12 02:10:25,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 02:10:25,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:10:25,947 INFO L87 Difference]: Start difference. First operand 81 states and 105 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-12 02:10:27,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:10:27,767 INFO L93 Difference]: Finished difference Result 107 states and 139 transitions. [2023-11-12 02:10:27,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:10:27,772 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 39 [2023-11-12 02:10:27,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:10:27,775 INFO L225 Difference]: With dead ends: 107 [2023-11-12 02:10:27,775 INFO L226 Difference]: Without dead ends: 105 [2023-11-12 02:10:27,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:10:27,777 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 28 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-12 02:10:27,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 336 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-12 02:10:27,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2023-11-12 02:10:27,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 87. [2023-11-12 02:10:27,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 63 states have (on average 1.253968253968254) internal successors, (79), 66 states have internal predecessors, (79), 15 states have call successors, (15), 7 states have call predecessors, (15), 8 states have return successors, (18), 13 states have call predecessors, (18), 14 states have call successors, (18) [2023-11-12 02:10:27,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 112 transitions. [2023-11-12 02:10:27,798 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 112 transitions. Word has length 39 [2023-11-12 02:10:27,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:10:27,799 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 112 transitions. [2023-11-12 02:10:27,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-12 02:10:27,799 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 112 transitions. [2023-11-12 02:10:27,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-12 02:10:27,801 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:10:27,801 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:10:27,820 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-11-12 02:10:28,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-12 02:10:28,014 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:10:28,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:10:28,014 INFO L85 PathProgramCache]: Analyzing trace with hash 2528960, now seen corresponding path program 1 times [2023-11-12 02:10:28,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-12 02:10:28,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [753020710] [2023-11-12 02:10:28,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:10:28,015 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-12 02:10:28,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/mathsat [2023-11-12 02:10:28,017 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-12 02:10:28,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33980733-eed6-4918-82a6-c37d97446ba7/bin/uautomizer-verify-uTZkv6EMXl/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-11-12 02:10:28,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:10:28,084 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:10:28,087 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:10:28,248 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-11-12 02:10:28,248 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:10:28,249 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-12 02:10:28,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [753020710] [2023-11-12 02:10:28,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [753020710] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:10:28,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:10:28,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 02:10:28,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531752678] [2023-11-12 02:10:28,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:10:28,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 02:10:28,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-12 02:10:28,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 02:10:28,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:10:28,255 INFO L87 Difference]: Start difference. First operand 87 states and 112 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3)