./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_unwindbound10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a0165632 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_4ce67df9-feb2-4a44-8d60-1fea71697500/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ce67df9-feb2-4a44-8d60-1fea71697500/bin/utaipan-verify-YMUCfTKeje/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ce67df9-feb2-4a44-8d60-1fea71697500/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ce67df9-feb2-4a44-8d60-1fea71697500/bin/utaipan-verify-YMUCfTKeje/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_unwindbound10.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ce67df9-feb2-4a44-8d60-1fea71697500/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ce67df9-feb2-4a44-8d60-1fea71697500/bin/utaipan-verify-YMUCfTKeje --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0a6d36c45579adaf3871b264b96aba9fa14294bc645c23d191a4e77c149500df --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 01:20:49,897 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 01:20:49,988 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ce67df9-feb2-4a44-8d60-1fea71697500/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-09 01:20:49,996 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 01:20:49,998 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 01:20:50,035 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 01:20:50,036 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 01:20:50,036 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 01:20:50,037 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 01:20:50,037 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 01:20:50,038 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 01:20:50,038 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 01:20:50,039 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 01:20:50,039 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 01:20:50,040 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 01:20:50,040 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 01:20:50,041 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 01:20:50,041 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 01:20:50,042 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 01:20:50,042 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 01:20:50,043 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 01:20:50,044 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 01:20:50,045 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 01:20:50,045 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 01:20:50,045 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 01:20:50,046 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 01:20:50,046 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 01:20:50,047 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 01:20:50,047 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 01:20:50,047 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 01:20:50,048 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 01:20:50,048 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 01:20:50,049 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 01:20:50,049 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 01:20:50,050 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 01:20:50,050 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 01:20:50,051 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 01:20:50,051 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 01:20:50,051 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 01:20:50,052 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 01:20:50,052 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 01:20:50,053 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 01:20:50,053 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 01:20:50,053 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 01:20:50,054 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 01:20:50,054 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 01:20:50,055 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 01:20:50,055 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_4ce67df9-feb2-4a44-8d60-1fea71697500/bin/utaipan-verify-YMUCfTKeje/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ce67df9-feb2-4a44-8d60-1fea71697500/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0a6d36c45579adaf3871b264b96aba9fa14294bc645c23d191a4e77c149500df [2024-11-09 01:20:50,326 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 01:20:50,362 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 01:20:50,365 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 01:20:50,368 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 01:20:50,368 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 01:20:50,369 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ce67df9-feb2-4a44-8d60-1fea71697500/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_unwindbound10.c Unable to find full path for "g++" [2024-11-09 01:20:52,863 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 01:20:53,169 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 01:20:53,170 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ce67df9-feb2-4a44-8d60-1fea71697500/sv-benchmarks/c/nla-digbench-scaling/egcd-ll_unwindbound10.c [2024-11-09 01:20:53,186 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ce67df9-feb2-4a44-8d60-1fea71697500/bin/utaipan-verify-YMUCfTKeje/data/3aa4124f9/2962eea7028349dc8122169b96ead4cc/FLAG351f6fa0b [2024-11-09 01:20:53,473 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ce67df9-feb2-4a44-8d60-1fea71697500/bin/utaipan-verify-YMUCfTKeje/data/3aa4124f9/2962eea7028349dc8122169b96ead4cc [2024-11-09 01:20:53,477 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 01:20:53,479 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 01:20:53,481 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 01:20:53,481 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 01:20:53,490 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 01:20:53,491 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 01:20:53" (1/1) ... [2024-11-09 01:20:53,497 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ccf4edd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:20:53, skipping insertion in model container [2024-11-09 01:20:53,497 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 01:20:53" (1/1) ... [2024-11-09 01:20:53,535 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 01:20:53,796 WARN L250 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_4ce67df9-feb2-4a44-8d60-1fea71697500/sv-benchmarks/c/nla-digbench-scaling/egcd-ll_unwindbound10.c[489,502] [2024-11-09 01:20:53,831 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 01:20:53,843 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 01:20:53,857 WARN L250 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_4ce67df9-feb2-4a44-8d60-1fea71697500/sv-benchmarks/c/nla-digbench-scaling/egcd-ll_unwindbound10.c[489,502] [2024-11-09 01:20:53,870 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 01:20:53,898 INFO L204 MainTranslator]: Completed translation [2024-11-09 01:20:53,898 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:20:53 WrapperNode [2024-11-09 01:20:53,899 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 01:20:53,901 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 01:20:53,901 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 01:20:53,901 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 01:20:53,912 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:20:53" (1/1) ... [2024-11-09 01:20:53,924 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:20:53" (1/1) ... [2024-11-09 01:20:53,951 INFO L138 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 59 [2024-11-09 01:20:53,952 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 01:20:53,953 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 01:20:53,953 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 01:20:53,954 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 01:20:53,967 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:20:53" (1/1) ... [2024-11-09 01:20:53,967 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:20:53" (1/1) ... [2024-11-09 01:20:53,969 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:20:53" (1/1) ... [2024-11-09 01:20:53,970 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:20:53" (1/1) ... [2024-11-09 01:20:53,974 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:20:53" (1/1) ... [2024-11-09 01:20:53,979 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:20:53" (1/1) ... [2024-11-09 01:20:53,980 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:20:53" (1/1) ... [2024-11-09 01:20:53,982 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:20:53" (1/1) ... [2024-11-09 01:20:53,984 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 01:20:53,986 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 01:20:53,986 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 01:20:53,987 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 01:20:53,988 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:20:53" (1/1) ... [2024-11-09 01:20:53,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 01:20:54,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ce67df9-feb2-4a44-8d60-1fea71697500/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:20:54,029 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ce67df9-feb2-4a44-8d60-1fea71697500/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 01:20:54,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ce67df9-feb2-4a44-8d60-1fea71697500/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 01:20:54,066 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 01:20:54,066 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-09 01:20:54,066 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-09 01:20:54,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-09 01:20:54,066 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 01:20:54,067 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 01:20:54,067 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-09 01:20:54,067 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-09 01:20:54,148 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 01:20:54,152 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 01:20:54,440 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-11-09 01:20:54,440 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 01:20:54,549 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 01:20:54,554 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-09 01:20:54,555 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 01:20:54 BoogieIcfgContainer [2024-11-09 01:20:54,555 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 01:20:54,561 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 01:20:54,561 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 01:20:54,567 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 01:20:54,568 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 01:20:53" (1/3) ... [2024-11-09 01:20:54,569 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e7afb32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 01:20:54, skipping insertion in model container [2024-11-09 01:20:54,570 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:20:53" (2/3) ... [2024-11-09 01:20:54,573 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e7afb32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 01:20:54, skipping insertion in model container [2024-11-09 01:20:54,573 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 01:20:54" (3/3) ... [2024-11-09 01:20:54,575 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd-ll_unwindbound10.c [2024-11-09 01:20:54,604 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 01:20:54,605 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-09 01:20:54,728 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 01:20:54,746 INFO L333 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, mAutomataTypeConcurrency=FINITE_AUTOMATA, 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;@6711d152, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 01:20:54,746 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-09 01:20:54,753 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-09 01:20:54,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-09 01:20:54,766 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:20:54,767 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:20:54,768 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:20:54,777 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:20:54,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1162680393, now seen corresponding path program 1 times [2024-11-09 01:20:54,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:20:54,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480825433] [2024-11-09 01:20:54,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:20:54,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:20:55,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:20:55,127 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 01:20:55,127 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:20:55,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480825433] [2024-11-09 01:20:55,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480825433] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:20:55,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 01:20:55,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 01:20:55,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314668617] [2024-11-09 01:20:55,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:20:55,142 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-09 01:20:55,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:20:55,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-09 01:20:55,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-09 01:20:55,191 INFO L87 Difference]: Start difference. First operand has 24 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-09 01:20:55,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:20:55,249 INFO L93 Difference]: Finished difference Result 42 states and 68 transitions. [2024-11-09 01:20:55,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-09 01:20:55,253 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 13 [2024-11-09 01:20:55,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:20:55,263 INFO L225 Difference]: With dead ends: 42 [2024-11-09 01:20:55,263 INFO L226 Difference]: Without dead ends: 22 [2024-11-09 01:20:55,271 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-09 01:20:55,281 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 01:20:55,286 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 01:20:55,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-11-09 01:20:55,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2024-11-09 01:20:55,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-09 01:20:55,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 30 transitions. [2024-11-09 01:20:55,341 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 30 transitions. Word has length 13 [2024-11-09 01:20:55,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:20:55,343 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 30 transitions. [2024-11-09 01:20:55,344 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-09 01:20:55,344 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 30 transitions. [2024-11-09 01:20:55,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-09 01:20:55,347 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:20:55,347 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:20:55,348 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 01:20:55,348 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:20:55,350 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:20:55,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1958383332, now seen corresponding path program 1 times [2024-11-09 01:20:55,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:20:55,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947992865] [2024-11-09 01:20:55,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:20:55,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:20:55,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:20:55,677 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 01:20:55,677 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:20:55,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947992865] [2024-11-09 01:20:55,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947992865] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:20:55,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 01:20:55,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 01:20:55,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809678127] [2024-11-09 01:20:55,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:20:55,681 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 01:20:55,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:20:55,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 01:20:55,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 01:20:55,684 INFO L87 Difference]: Start difference. First operand 22 states and 30 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-09 01:20:55,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:20:55,772 INFO L93 Difference]: Finished difference Result 34 states and 45 transitions. [2024-11-09 01:20:55,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 01:20:55,780 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 14 [2024-11-09 01:20:55,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:20:55,781 INFO L225 Difference]: With dead ends: 34 [2024-11-09 01:20:55,782 INFO L226 Difference]: Without dead ends: 24 [2024-11-09 01:20:55,784 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 01:20:55,787 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 3 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 01:20:55,788 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 69 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 01:20:55,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-11-09 01:20:55,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-11-09 01:20:55,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-09 01:20:55,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 32 transitions. [2024-11-09 01:20:55,814 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 32 transitions. Word has length 14 [2024-11-09 01:20:55,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:20:55,818 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 32 transitions. [2024-11-09 01:20:55,818 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-09 01:20:55,819 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 32 transitions. [2024-11-09 01:20:55,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-09 01:20:55,820 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:20:55,820 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:20:55,825 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 01:20:55,825 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:20:55,827 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:20:55,827 INFO L85 PathProgramCache]: Analyzing trace with hash 1960051628, now seen corresponding path program 1 times [2024-11-09 01:20:55,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:20:55,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506121040] [2024-11-09 01:20:55,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:20:55,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:20:55,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 01:20:55,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [94233050] [2024-11-09 01:20:55,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:20:55,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:20:55,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ce67df9-feb2-4a44-8d60-1fea71697500/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:20:55,878 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ce67df9-feb2-4a44-8d60-1fea71697500/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:20:55,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ce67df9-feb2-4a44-8d60-1fea71697500/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 01:20:55,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:20:56,002 INFO L255 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 01:20:56,014 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:20:56,219 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 01:20:56,220 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 01:20:56,220 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:20:56,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506121040] [2024-11-09 01:20:56,222 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 01:20:56,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94233050] [2024-11-09 01:20:56,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94233050] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:20:56,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 01:20:56,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 01:20:56,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775223160] [2024-11-09 01:20:56,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:20:56,225 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 01:20:56,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:20:56,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 01:20:56,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 01:20:56,227 INFO L87 Difference]: Start difference. First operand 24 states and 32 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-09 01:20:56,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:20:56,360 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2024-11-09 01:20:56,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 01:20:56,361 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 14 [2024-11-09 01:20:56,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:20:56,362 INFO L225 Difference]: With dead ends: 38 [2024-11-09 01:20:56,363 INFO L226 Difference]: Without dead ends: 36 [2024-11-09 01:20:56,363 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-09 01:20:56,365 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 4 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 01:20:56,366 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 104 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 01:20:56,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-11-09 01:20:56,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2024-11-09 01:20:56,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 16 states have (on average 1.25) internal successors, (20), 18 states have internal predecessors, (20), 15 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2024-11-09 01:20:56,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 49 transitions. [2024-11-09 01:20:56,381 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 49 transitions. Word has length 14 [2024-11-09 01:20:56,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:20:56,382 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 49 transitions. [2024-11-09 01:20:56,382 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-09 01:20:56,382 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 49 transitions. [2024-11-09 01:20:56,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-09 01:20:56,383 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:20:56,383 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:20:56,427 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ce67df9-feb2-4a44-8d60-1fea71697500/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 01:20:56,585 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ce67df9-feb2-4a44-8d60-1fea71697500/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:20:56,586 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:20:56,587 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:20:56,587 INFO L85 PathProgramCache]: Analyzing trace with hash -933039579, now seen corresponding path program 1 times [2024-11-09 01:20:56,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:20:56,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745628288] [2024-11-09 01:20:56,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:20:56,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:20:56,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 01:20:56,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [198474988] [2024-11-09 01:20:56,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:20:56,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:20:56,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ce67df9-feb2-4a44-8d60-1fea71697500/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:20:56,662 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ce67df9-feb2-4a44-8d60-1fea71697500/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:20:56,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ce67df9-feb2-4a44-8d60-1fea71697500/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 01:20:56,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:20:56,757 INFO L255 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 01:20:56,759 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:20:56,903 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 01:20:56,904 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 01:20:56,904 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:20:56,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745628288] [2024-11-09 01:20:56,905 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 01:20:56,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198474988] [2024-11-09 01:20:56,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198474988] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:20:56,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 01:20:56,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 01:20:56,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101330789] [2024-11-09 01:20:56,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:20:56,907 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 01:20:56,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:20:56,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 01:20:56,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 01:20:56,909 INFO L87 Difference]: Start difference. First operand 35 states and 49 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-09 01:20:57,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:20:57,005 INFO L93 Difference]: Finished difference Result 42 states and 55 transitions. [2024-11-09 01:20:57,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 01:20:57,006 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 19 [2024-11-09 01:20:57,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:20:57,007 INFO L225 Difference]: With dead ends: 42 [2024-11-09 01:20:57,008 INFO L226 Difference]: Without dead ends: 40 [2024-11-09 01:20:57,009 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-09 01:20:57,010 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 4 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 01:20:57,011 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 92 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 01:20:57,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-11-09 01:20:57,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2024-11-09 01:20:57,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 21 states have internal predecessors, (23), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2024-11-09 01:20:57,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 52 transitions. [2024-11-09 01:20:57,028 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 52 transitions. Word has length 19 [2024-11-09 01:20:57,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:20:57,028 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 52 transitions. [2024-11-09 01:20:57,029 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-09 01:20:57,029 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 52 transitions. [2024-11-09 01:20:57,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-09 01:20:57,030 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:20:57,030 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:20:57,058 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ce67df9-feb2-4a44-8d60-1fea71697500/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 01:20:57,231 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ce67df9-feb2-4a44-8d60-1fea71697500/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:20:57,232 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:20:57,233 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:20:57,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1838169868, now seen corresponding path program 1 times [2024-11-09 01:20:57,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:20:57,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903459514] [2024-11-09 01:20:57,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:20:57,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:20:57,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 01:20:57,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1849933026] [2024-11-09 01:20:57,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:20:57,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:20:57,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ce67df9-feb2-4a44-8d60-1fea71697500/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:20:57,280 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ce67df9-feb2-4a44-8d60-1fea71697500/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:20:57,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ce67df9-feb2-4a44-8d60-1fea71697500/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 01:20:57,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:20:57,400 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 01:20:57,403 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:20:57,520 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 01:20:57,521 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 01:20:57,521 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:20:57,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903459514] [2024-11-09 01:20:57,521 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 01:20:57,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849933026] [2024-11-09 01:20:57,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849933026] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:20:57,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 01:20:57,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 01:20:57,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557754035] [2024-11-09 01:20:57,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:20:57,523 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 01:20:57,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:20:57,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 01:20:57,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 01:20:57,525 INFO L87 Difference]: Start difference. First operand 39 states and 52 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-09 01:20:57,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:20:57,618 INFO L93 Difference]: Finished difference Result 46 states and 58 transitions. [2024-11-09 01:20:57,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 01:20:57,619 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 24 [2024-11-09 01:20:57,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:20:57,620 INFO L225 Difference]: With dead ends: 46 [2024-11-09 01:20:57,621 INFO L226 Difference]: Without dead ends: 42 [2024-11-09 01:20:57,621 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-09 01:20:57,623 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 4 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 01:20:57,623 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 92 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 01:20:57,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-11-09 01:20:57,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2024-11-09 01:20:57,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 24 states have internal predecessors, (26), 14 states have call successors, (14), 5 states have call predecessors, (14), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-11-09 01:20:57,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 52 transitions. [2024-11-09 01:20:57,638 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 52 transitions. Word has length 24 [2024-11-09 01:20:57,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:20:57,639 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 52 transitions. [2024-11-09 01:20:57,639 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-09 01:20:57,639 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 52 transitions. [2024-11-09 01:20:57,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-09 01:20:57,640 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:20:57,641 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:20:57,669 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ce67df9-feb2-4a44-8d60-1fea71697500/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-09 01:20:57,845 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ce67df9-feb2-4a44-8d60-1fea71697500/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:20:57,846 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:20:57,846 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:20:57,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1441249495, now seen corresponding path program 1 times [2024-11-09 01:20:57,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:20:57,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376329595] [2024-11-09 01:20:57,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:20:57,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:20:57,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:20:58,104 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-09 01:20:58,104 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:20:58,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376329595] [2024-11-09 01:20:58,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376329595] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:20:58,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 01:20:58,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 01:20:58,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082936633] [2024-11-09 01:20:58,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:20:58,105 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 01:20:58,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:20:58,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 01:20:58,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 01:20:58,109 INFO L87 Difference]: Start difference. First operand 42 states and 52 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2024-11-09 01:20:58,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:20:58,210 INFO L93 Difference]: Finished difference Result 52 states and 64 transitions. [2024-11-09 01:20:58,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 01:20:58,212 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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 30 [2024-11-09 01:20:58,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:20:58,214 INFO L225 Difference]: With dead ends: 52 [2024-11-09 01:20:58,217 INFO L226 Difference]: Without dead ends: 50 [2024-11-09 01:20:58,218 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-09 01:20:58,220 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 3 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 01:20:58,220 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 107 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 01:20:58,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-11-09 01:20:58,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2024-11-09 01:20:58,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 25 states have (on average 1.16) internal successors, (29), 28 states have internal predecessors, (29), 15 states have call successors, (15), 6 states have call predecessors, (15), 6 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2024-11-09 01:20:58,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 57 transitions. [2024-11-09 01:20:58,236 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 57 transitions. Word has length 30 [2024-11-09 01:20:58,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:20:58,236 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 57 transitions. [2024-11-09 01:20:58,236 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2024-11-09 01:20:58,237 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 57 transitions. [2024-11-09 01:20:58,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-09 01:20:58,238 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:20:58,239 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:20:58,239 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-09 01:20:58,239 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:20:58,240 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:20:58,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1448869900, now seen corresponding path program 1 times [2024-11-09 01:20:58,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:20:58,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429887563] [2024-11-09 01:20:58,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:20:58,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:20:58,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:20:58,436 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-09 01:20:58,437 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:20:58,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429887563] [2024-11-09 01:20:58,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429887563] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:20:58,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092026040] [2024-11-09 01:20:58,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:20:58,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:20:58,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ce67df9-feb2-4a44-8d60-1fea71697500/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:20:58,442 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ce67df9-feb2-4a44-8d60-1fea71697500/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:20:58,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ce67df9-feb2-4a44-8d60-1fea71697500/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 01:20:58,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:20:58,515 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-09 01:20:58,517 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:20:58,650 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-09 01:20:58,651 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:20:58,807 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-09 01:20:58,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092026040] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:20:58,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1744406131] [2024-11-09 01:20:58,844 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 01:20:58,844 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:20:58,850 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:20:58,858 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:20:58,859 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:21:01,738 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2024-11-09 01:21:01,747 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 64 for LOIs [2024-11-09 01:21:01,768 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:21:08,928 WARN L286 SmtUtils]: Spent 6.46s on a formula simplification. DAG size of input: 106 DAG size of output: 104 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 01:21:19,649 WARN L286 SmtUtils]: Spent 8.56s on a formula simplification. DAG size of input: 109 DAG size of output: 106 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 01:21:32,924 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1171#(and (<= 1 |#StackHeapBarrier|) (<= 1 ~counter~0) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-09 01:21:32,924 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:21:32,925 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:21:32,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 5] total 10 [2024-11-09 01:21:32,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789665423] [2024-11-09 01:21:32,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:21:32,926 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-09 01:21:32,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:21:32,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-09 01:21:32,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=487, Unknown=5, NotChecked=0, Total=600 [2024-11-09 01:21:32,929 INFO L87 Difference]: Start difference. First operand 47 states and 57 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 6 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2024-11-09 01:21:33,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:21:33,325 INFO L93 Difference]: Finished difference Result 109 states and 132 transitions. [2024-11-09 01:21:33,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-09 01:21:33,326 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 6 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 32 [2024-11-09 01:21:33,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:21:33,331 INFO L225 Difference]: With dead ends: 109 [2024-11-09 01:21:33,331 INFO L226 Difference]: Without dead ends: 97 [2024-11-09 01:21:33,332 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 31.3s TimeCoverageRelationStatistics Valid=121, Invalid=576, Unknown=5, NotChecked=0, Total=702 [2024-11-09 01:21:33,333 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 46 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 01:21:33,334 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 125 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 01:21:33,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2024-11-09 01:21:33,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 91. [2024-11-09 01:21:33,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 50 states have (on average 1.16) internal successors, (58), 54 states have internal predecessors, (58), 29 states have call successors, (29), 12 states have call predecessors, (29), 11 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2024-11-09 01:21:33,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 112 transitions. [2024-11-09 01:21:33,360 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 112 transitions. Word has length 32 [2024-11-09 01:21:33,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:21:33,361 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 112 transitions. [2024-11-09 01:21:33,361 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 6 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2024-11-09 01:21:33,362 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 112 transitions. [2024-11-09 01:21:33,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-09 01:21:33,363 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:21:33,363 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:21:33,392 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ce67df9-feb2-4a44-8d60-1fea71697500/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-09 01:21:33,564 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ce67df9-feb2-4a44-8d60-1fea71697500/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:21:33,565 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:21:33,567 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:21:33,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1450538196, now seen corresponding path program 1 times [2024-11-09 01:21:33,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:21:33,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227088137] [2024-11-09 01:21:33,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:21:33,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:21:33,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 01:21:33,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2142285006] [2024-11-09 01:21:33,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:21:33,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:21:33,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ce67df9-feb2-4a44-8d60-1fea71697500/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:21:33,640 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ce67df9-feb2-4a44-8d60-1fea71697500/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:21:33,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ce67df9-feb2-4a44-8d60-1fea71697500/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 01:21:33,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:21:33,732 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-09 01:21:33,735 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:21:34,462 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 01:21:34,463 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:21:35,017 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:21:35,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227088137] [2024-11-09 01:21:35,017 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 01:21:35,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142285006] [2024-11-09 01:21:35,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142285006] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:21:35,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2019493378] [2024-11-09 01:21:35,021 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2024-11-09 01:21:35,021 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:21:35,021 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:21:35,022 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:21:35,022 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:21:36,382 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2024-11-09 01:21:36,397 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 64 for LOIs [2024-11-09 01:21:36,446 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:21:49,731 WARN L286 SmtUtils]: Spent 11.16s on a formula simplification. DAG size of input: 106 DAG size of output: 103 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 01:22:15,083 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1655#(and (<= 1 |#StackHeapBarrier|) (<= 1 ~counter~0) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-09 01:22:15,083 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:22:15,084 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-09 01:22:15,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2024-11-09 01:22:15,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302010091] [2024-11-09 01:22:15,084 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-09 01:22:15,084 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-09 01:22:15,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:22:15,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-09 01:22:15,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=602, Unknown=7, NotChecked=0, Total=702 [2024-11-09 01:22:15,086 INFO L87 Difference]: Start difference. First operand 91 states and 112 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-09 01:22:15,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:22:15,546 INFO L93 Difference]: Finished difference Result 97 states and 117 transitions. [2024-11-09 01:22:15,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 01:22:15,547 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 32 [2024-11-09 01:22:15,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:22:15,550 INFO L225 Difference]: With dead ends: 97 [2024-11-09 01:22:15,550 INFO L226 Difference]: Without dead ends: 95 [2024-11-09 01:22:15,551 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 39.2s TimeCoverageRelationStatistics Valid=100, Invalid=649, Unknown=7, NotChecked=0, Total=756 [2024-11-09 01:22:15,552 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 6 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 01:22:15,552 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 131 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 01:22:15,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-11-09 01:22:15,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2024-11-09 01:22:15,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 53 states have (on average 1.150943396226415) internal successors, (61), 57 states have internal predecessors, (61), 29 states have call successors, (29), 13 states have call predecessors, (29), 12 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2024-11-09 01:22:15,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 115 transitions. [2024-11-09 01:22:15,573 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 115 transitions. Word has length 32 [2024-11-09 01:22:15,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:22:15,574 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 115 transitions. [2024-11-09 01:22:15,574 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-09 01:22:15,574 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 115 transitions. [2024-11-09 01:22:15,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-09 01:22:15,575 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:22:15,576 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:22:15,603 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ce67df9-feb2-4a44-8d60-1fea71697500/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-09 01:22:15,776 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ce67df9-feb2-4a44-8d60-1fea71697500/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:22:15,777 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:22:15,777 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:22:15,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1744149512, now seen corresponding path program 1 times [2024-11-09 01:22:15,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:22:15,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761029735] [2024-11-09 01:22:15,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:22:15,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:22:15,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:22:16,169 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-09 01:22:16,169 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:22:16,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761029735] [2024-11-09 01:22:16,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761029735] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:22:16,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354861020] [2024-11-09 01:22:16,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:22:16,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:22:16,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ce67df9-feb2-4a44-8d60-1fea71697500/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:22:16,173 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ce67df9-feb2-4a44-8d60-1fea71697500/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:22:16,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ce67df9-feb2-4a44-8d60-1fea71697500/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 01:22:16,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:22:16,249 INFO L255 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-09 01:22:16,251 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:22:16,611 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-09 01:22:16,611 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 01:22:16,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354861020] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:22:16,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 01:22:16,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2024-11-09 01:22:16,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752916555] [2024-11-09 01:22:16,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:22:16,613 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 01:22:16,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:22:16,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 01:22:16,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-11-09 01:22:16,614 INFO L87 Difference]: Start difference. First operand 95 states and 115 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-09 01:22:16,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:22:16,786 INFO L93 Difference]: Finished difference Result 97 states and 116 transitions. [2024-11-09 01:22:16,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 01:22:16,786 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 35 [2024-11-09 01:22:16,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:22:16,788 INFO L225 Difference]: With dead ends: 97 [2024-11-09 01:22:16,788 INFO L226 Difference]: Without dead ends: 87 [2024-11-09 01:22:16,789 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2024-11-09 01:22:16,791 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 4 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 01:22:16,791 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 112 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 01:22:16,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-11-09 01:22:16,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2024-11-09 01:22:16,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 48 states have (on average 1.1458333333333333) internal successors, (55), 52 states have internal predecessors, (55), 27 states have call successors, (27), 11 states have call predecessors, (27), 11 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2024-11-09 01:22:16,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 106 transitions. [2024-11-09 01:22:16,821 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 106 transitions. Word has length 35 [2024-11-09 01:22:16,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:22:16,822 INFO L471 AbstractCegarLoop]: Abstraction has 87 states and 106 transitions. [2024-11-09 01:22:16,822 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-09 01:22:16,822 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 106 transitions. [2024-11-09 01:22:16,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-09 01:22:16,823 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:22:16,823 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:22:16,842 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ce67df9-feb2-4a44-8d60-1fea71697500/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-09 01:22:17,028 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ce67df9-feb2-4a44-8d60-1fea71697500/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:22:17,028 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:22:17,029 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:22:17,029 INFO L85 PathProgramCache]: Analyzing trace with hash -616433155, now seen corresponding path program 2 times [2024-11-09 01:22:17,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:22:17,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009264382] [2024-11-09 01:22:17,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:22:17,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:22:17,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 01:22:17,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [379032631] [2024-11-09 01:22:17,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 01:22:17,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:22:17,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ce67df9-feb2-4a44-8d60-1fea71697500/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:22:17,071 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ce67df9-feb2-4a44-8d60-1fea71697500/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:22:17,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ce67df9-feb2-4a44-8d60-1fea71697500/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 01:22:17,155 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-09 01:22:17,156 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 01:22:17,158 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-09 01:22:17,161 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:22:17,923 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-09 01:22:17,923 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:22:18,665 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-09 01:22:18,666 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:22:18,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009264382] [2024-11-09 01:22:18,666 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 01:22:18,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379032631] [2024-11-09 01:22:18,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379032631] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:22:18,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1590867501] [2024-11-09 01:22:18,669 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2024-11-09 01:22:18,669 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:22:18,670 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:22:18,670 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:22:18,670 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:22:20,025 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2024-11-09 01:22:20,041 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 64 for LOIs [2024-11-09 01:22:20,063 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:22:38,078 WARN L286 SmtUtils]: Spent 6.71s on a formula simplification. DAG size of input: 109 DAG size of output: 107 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 01:22:46,228 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2625#(and (<= 1 |#StackHeapBarrier|) (<= 1 ~counter~0) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-09 01:22:46,228 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:22:46,228 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 01:22:46,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2024-11-09 01:22:46,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272812844] [2024-11-09 01:22:46,229 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 01:22:46,229 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-09 01:22:46,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:22:46,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-09 01:22:46,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=603, Unknown=4, NotChecked=0, Total=702 [2024-11-09 01:22:46,231 INFO L87 Difference]: Start difference. First operand 87 states and 106 transitions. Second operand has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 6 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2024-11-09 01:22:47,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:22:47,671 INFO L93 Difference]: Finished difference Result 97 states and 115 transitions. [2024-11-09 01:22:47,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-09 01:22:47,672 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 6 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 37 [2024-11-09 01:22:47,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:22:47,674 INFO L225 Difference]: With dead ends: 97 [2024-11-09 01:22:47,674 INFO L226 Difference]: Without dead ends: 95 [2024-11-09 01:22:47,675 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 27.3s TimeCoverageRelationStatistics Valid=129, Invalid=797, Unknown=4, NotChecked=0, Total=930 [2024-11-09 01:22:47,676 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 16 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-09 01:22:47,677 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 176 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-09 01:22:47,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-11-09 01:22:47,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2024-11-09 01:22:47,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 54 states have (on average 1.1296296296296295) internal successors, (61), 58 states have internal predecessors, (61), 27 states have call successors, (27), 13 states have call predecessors, (27), 13 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2024-11-09 01:22:47,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 112 transitions. [2024-11-09 01:22:47,704 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 112 transitions. Word has length 37 [2024-11-09 01:22:47,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:22:47,705 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 112 transitions. [2024-11-09 01:22:47,706 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 6 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2024-11-09 01:22:47,706 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 112 transitions. [2024-11-09 01:22:47,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-09 01:22:47,707 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:22:47,707 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:22:47,731 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ce67df9-feb2-4a44-8d60-1fea71697500/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-09 01:22:47,912 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ce67df9-feb2-4a44-8d60-1fea71697500/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-09 01:22:47,912 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:22:47,913 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:22:47,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1332453836, now seen corresponding path program 3 times [2024-11-09 01:22:47,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:22:47,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681014994] [2024-11-09 01:22:47,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:22:47,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:22:47,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 01:22:47,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [411852747] [2024-11-09 01:22:47,956 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 01:22:47,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:22:47,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ce67df9-feb2-4a44-8d60-1fea71697500/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:22:47,958 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ce67df9-feb2-4a44-8d60-1fea71697500/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:22:47,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ce67df9-feb2-4a44-8d60-1fea71697500/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 01:22:48,041 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 01:22:48,041 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 01:22:48,043 INFO L255 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-09 01:22:48,045 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:22:48,784 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-11-09 01:22:48,785 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:22:49,475 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-11-09 01:22:49,476 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:22:49,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681014994] [2024-11-09 01:22:49,476 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 01:22:49,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411852747] [2024-11-09 01:22:49,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411852747] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:22:49,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [393358701] [2024-11-09 01:22:49,479 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2024-11-09 01:22:49,480 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:22:49,480 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:22:49,480 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:22:49,480 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:22:50,713 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2024-11-09 01:22:50,727 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 64 for LOIs [2024-11-09 01:22:50,749 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:23:16,881 WARN L286 SmtUtils]: Spent 24.80s on a formula simplification. DAG size of input: 106 DAG size of output: 105 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 01:23:30,301 WARN L286 SmtUtils]: Spent 11.19s on a formula simplification. DAG size of input: 109 DAG size of output: 107 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 01:23:37,368 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3210#(and (<= 1 |#StackHeapBarrier|) (<= 1 ~counter~0) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-09 01:23:37,368 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:23:37,369 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 01:23:37,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2024-11-09 01:23:37,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555828914] [2024-11-09 01:23:37,369 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 01:23:37,370 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-09 01:23:37,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:23:37,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-09 01:23:37,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=430, Unknown=3, NotChecked=0, Total=506 [2024-11-09 01:23:37,372 INFO L87 Difference]: Start difference. First operand 95 states and 112 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2024-11-09 01:23:38,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:23:38,147 INFO L93 Difference]: Finished difference Result 105 states and 121 transitions. [2024-11-09 01:23:38,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 01:23:38,148 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 42 [2024-11-09 01:23:38,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:23:38,150 INFO L225 Difference]: With dead ends: 105 [2024-11-09 01:23:38,150 INFO L226 Difference]: Without dead ends: 98 [2024-11-09 01:23:38,151 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 101 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 47.2s TimeCoverageRelationStatistics Valid=82, Invalid=515, Unknown=3, NotChecked=0, Total=600 [2024-11-09 01:23:38,152 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 6 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 01:23:38,152 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 160 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 01:23:38,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2024-11-09 01:23:38,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2024-11-09 01:23:38,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 59 states have (on average 1.1016949152542372) internal successors, (65), 62 states have internal predecessors, (65), 24 states have call successors, (24), 15 states have call predecessors, (24), 14 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2024-11-09 01:23:38,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 110 transitions. [2024-11-09 01:23:38,185 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 110 transitions. Word has length 42 [2024-11-09 01:23:38,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:23:38,186 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 110 transitions. [2024-11-09 01:23:38,186 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2024-11-09 01:23:38,186 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 110 transitions. [2024-11-09 01:23:38,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-09 01:23:38,188 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:23:38,188 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:23:38,209 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ce67df9-feb2-4a44-8d60-1fea71697500/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-09 01:23:38,392 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ce67df9-feb2-4a44-8d60-1fea71697500/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-09 01:23:38,392 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:23:38,393 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:23:38,393 INFO L85 PathProgramCache]: Analyzing trace with hash -912528388, now seen corresponding path program 4 times [2024-11-09 01:23:38,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:23:38,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169975678] [2024-11-09 01:23:38,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:23:38,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:23:38,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 01:23:38,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1940095517] [2024-11-09 01:23:38,425 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 01:23:38,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:23:38,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ce67df9-feb2-4a44-8d60-1fea71697500/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:23:38,428 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ce67df9-feb2-4a44-8d60-1fea71697500/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:23:38,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ce67df9-feb2-4a44-8d60-1fea71697500/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 01:23:38,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:23:38,509 INFO L255 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-09 01:23:38,512 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:23:39,553 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2024-11-09 01:23:39,553 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:23:40,024 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2024-11-09 01:23:40,024 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:23:40,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169975678] [2024-11-09 01:23:40,024 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 01:23:40,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940095517] [2024-11-09 01:23:40,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940095517] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-09 01:23:40,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 01:23:40,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 8 [2024-11-09 01:23:40,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447890974] [2024-11-09 01:23:40,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:23:40,025 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 01:23:40,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:23:40,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 01:23:40,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-11-09 01:23:40,026 INFO L87 Difference]: Start difference. First operand 98 states and 110 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-09 01:23:40,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:23:40,171 INFO L93 Difference]: Finished difference Result 108 states and 119 transitions. [2024-11-09 01:23:40,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 01:23:40,171 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 50 [2024-11-09 01:23:40,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:23:40,173 INFO L225 Difference]: With dead ends: 108 [2024-11-09 01:23:40,173 INFO L226 Difference]: Without dead ends: 103 [2024-11-09 01:23:40,173 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 90 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-11-09 01:23:40,174 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 5 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 01:23:40,174 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 76 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 01:23:40,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2024-11-09 01:23:40,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 95. [2024-11-09 01:23:40,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 59 states have (on average 1.0847457627118644) internal successors, (64), 61 states have internal predecessors, (64), 21 states have call successors, (21), 15 states have call predecessors, (21), 14 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2024-11-09 01:23:40,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 104 transitions. [2024-11-09 01:23:40,198 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 104 transitions. Word has length 50 [2024-11-09 01:23:40,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:23:40,198 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 104 transitions. [2024-11-09 01:23:40,199 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-09 01:23:40,199 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 104 transitions. [2024-11-09 01:23:40,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-09 01:23:40,200 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:23:40,200 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:23:40,225 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ce67df9-feb2-4a44-8d60-1fea71697500/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-09 01:23:40,401 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ce67df9-feb2-4a44-8d60-1fea71697500/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-09 01:23:40,401 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:23:40,402 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:23:40,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1858472992, now seen corresponding path program 1 times [2024-11-09 01:23:40,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:23:40,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518541640] [2024-11-09 01:23:40,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:23:40,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:23:40,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:23:40,789 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 27 proven. 7 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2024-11-09 01:23:40,789 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:23:40,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518541640] [2024-11-09 01:23:40,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518541640] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:23:40,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979859813] [2024-11-09 01:23:40,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:23:40,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:23:40,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ce67df9-feb2-4a44-8d60-1fea71697500/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:23:40,793 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ce67df9-feb2-4a44-8d60-1fea71697500/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:23:40,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ce67df9-feb2-4a44-8d60-1fea71697500/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-09 01:23:40,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:23:40,866 INFO L255 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-09 01:23:40,869 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:23:41,059 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 41 proven. 5 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-09 01:23:41,059 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:23:41,318 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 41 proven. 5 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-09 01:23:41,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979859813] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:23:41,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [981675210] [2024-11-09 01:23:41,322 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-09 01:23:41,322 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:23:41,322 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:23:41,323 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:23:41,323 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:23:43,141 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2024-11-09 01:23:43,156 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 64 for LOIs [2024-11-09 01:23:43,177 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:23:57,223 WARN L286 SmtUtils]: Spent 12.99s on a formula simplification. DAG size of input: 106 DAG size of output: 104 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 01:24:06,355 WARN L286 SmtUtils]: Spent 6.42s on a formula simplification. DAG size of input: 109 DAG size of output: 107 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 01:24:19,803 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4501#(and (<= 1 |#StackHeapBarrier|) (<= 1 ~counter~0) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-09 01:24:19,803 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:24:19,803 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:24:19,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 8] total 13 [2024-11-09 01:24:19,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079460954] [2024-11-09 01:24:19,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:24:19,804 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-09 01:24:19,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:24:19,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-09 01:24:19,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=692, Unknown=3, NotChecked=0, Total=812 [2024-11-09 01:24:19,805 INFO L87 Difference]: Start difference. First operand 95 states and 104 transitions. Second operand has 13 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (12), 4 states have call predecessors, (12), 6 states have call successors, (12) [2024-11-09 01:24:20,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:24:20,264 INFO L93 Difference]: Finished difference Result 104 states and 114 transitions. [2024-11-09 01:24:20,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 01:24:20,265 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (12), 4 states have call predecessors, (12), 6 states have call successors, (12) Word has length 53 [2024-11-09 01:24:20,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:24:20,267 INFO L225 Difference]: With dead ends: 104 [2024-11-09 01:24:20,267 INFO L226 Difference]: Without dead ends: 94 [2024-11-09 01:24:20,268 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 37.0s TimeCoverageRelationStatistics Valid=125, Invalid=742, Unknown=3, NotChecked=0, Total=870 [2024-11-09 01:24:20,268 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 7 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 01:24:20,269 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 116 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 01:24:20,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2024-11-09 01:24:20,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 92. [2024-11-09 01:24:20,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 57 states have (on average 1.0526315789473684) internal successors, (60), 59 states have internal predecessors, (60), 20 states have call successors, (20), 14 states have call predecessors, (20), 14 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2024-11-09 01:24:20,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 99 transitions. [2024-11-09 01:24:20,292 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 99 transitions. Word has length 53 [2024-11-09 01:24:20,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:24:20,292 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 99 transitions. [2024-11-09 01:24:20,293 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (12), 4 states have call predecessors, (12), 6 states have call successors, (12) [2024-11-09 01:24:20,293 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 99 transitions. [2024-11-09 01:24:20,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-11-09 01:24:20,295 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:24:20,295 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:24:20,317 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ce67df9-feb2-4a44-8d60-1fea71697500/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-09 01:24:20,496 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ce67df9-feb2-4a44-8d60-1fea71697500/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-09 01:24:20,496 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:24:20,497 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:24:20,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1083291565, now seen corresponding path program 5 times [2024-11-09 01:24:20,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:24:20,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108797017] [2024-11-09 01:24:20,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:24:20,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:24:20,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 01:24:20,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1544351297] [2024-11-09 01:24:20,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 01:24:20,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:24:20,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ce67df9-feb2-4a44-8d60-1fea71697500/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:24:20,585 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ce67df9-feb2-4a44-8d60-1fea71697500/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:24:20,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ce67df9-feb2-4a44-8d60-1fea71697500/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-09 01:24:20,751 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-09 01:24:20,752 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 01:24:20,753 INFO L255 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-09 01:24:20,756 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:24:27,439 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 21 proven. 30 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2024-11-09 01:24:27,439 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:24:34,185 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 20 proven. 30 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2024-11-09 01:24:34,186 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:24:34,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108797017] [2024-11-09 01:24:34,186 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 01:24:34,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544351297] [2024-11-09 01:24:34,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544351297] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:24:34,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1831686331] [2024-11-09 01:24:34,189 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2024-11-09 01:24:34,189 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:24:34,190 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:24:34,190 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:24:34,190 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:24:35,151 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2024-11-09 01:24:35,165 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 64 for LOIs [2024-11-09 01:24:35,189 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:24:48,132 WARN L286 SmtUtils]: Spent 7.59s on a formula simplification. DAG size of input: 106 DAG size of output: 104 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 01:25:03,242 WARN L286 SmtUtils]: Spent 11.59s on a formula simplification. DAG size of input: 109 DAG size of output: 106 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 01:25:11,289 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5276#(and (<= 1 |#StackHeapBarrier|) (<= 1 ~counter~0) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-09 01:25:11,289 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:25:11,289 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 01:25:11,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2024-11-09 01:25:11,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684728235] [2024-11-09 01:25:11,290 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 01:25:11,290 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-09 01:25:11,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:25:11,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-09 01:25:11,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=806, Unknown=3, NotChecked=0, Total=930 [2024-11-09 01:25:11,292 INFO L87 Difference]: Start difference. First operand 92 states and 99 transitions. Second operand has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 9 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (23), 10 states have call predecessors, (23), 9 states have call successors, (23) [2024-11-09 01:25:21,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:25:21,803 INFO L93 Difference]: Finished difference Result 142 states and 183 transitions. [2024-11-09 01:25:21,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-09 01:25:21,804 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 9 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (23), 10 states have call predecessors, (23), 9 states have call successors, (23) Word has length 73 [2024-11-09 01:25:21,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:25:21,806 INFO L225 Difference]: With dead ends: 142 [2024-11-09 01:25:21,806 INFO L226 Difference]: Without dead ends: 140 [2024-11-09 01:25:21,807 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 45.6s TimeCoverageRelationStatistics Valid=206, Invalid=1197, Unknown=3, NotChecked=0, Total=1406 [2024-11-09 01:25:21,808 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 43 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2024-11-09 01:25:21,809 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 321 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2024-11-09 01:25:21,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2024-11-09 01:25:21,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 116. [2024-11-09 01:25:21,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 69 states have (on average 1.1304347826086956) internal successors, (78), 72 states have internal predecessors, (78), 31 states have call successors, (31), 15 states have call predecessors, (31), 15 states have return successors, (30), 28 states have call predecessors, (30), 30 states have call successors, (30) [2024-11-09 01:25:21,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 139 transitions. [2024-11-09 01:25:21,853 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 139 transitions. Word has length 73 [2024-11-09 01:25:21,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:25:21,853 INFO L471 AbstractCegarLoop]: Abstraction has 116 states and 139 transitions. [2024-11-09 01:25:21,854 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 9 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (23), 10 states have call predecessors, (23), 9 states have call successors, (23) [2024-11-09 01:25:21,854 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 139 transitions. [2024-11-09 01:25:21,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2024-11-09 01:25:21,855 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:25:21,856 INFO L215 NwaCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:25:21,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ce67df9-feb2-4a44-8d60-1fea71697500/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-09 01:25:22,056 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ce67df9-feb2-4a44-8d60-1fea71697500/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:25:22,056 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:25:22,057 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:25:22,057 INFO L85 PathProgramCache]: Analyzing trace with hash -186143100, now seen corresponding path program 6 times [2024-11-09 01:25:22,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:25:22,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560922588] [2024-11-09 01:25:22,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:25:22,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:25:22,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 01:25:22,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [307779416] [2024-11-09 01:25:22,120 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 01:25:22,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:25:22,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ce67df9-feb2-4a44-8d60-1fea71697500/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:25:22,123 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ce67df9-feb2-4a44-8d60-1fea71697500/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:25:22,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ce67df9-feb2-4a44-8d60-1fea71697500/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-09 01:25:22,223 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 01:25:22,223 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 01:25:22,225 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-09 01:25:22,229 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:25:29,146 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 47 proven. 62 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2024-11-09 01:25:29,146 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:25:38,234 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 50 proven. 59 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2024-11-09 01:25:38,234 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:25:38,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560922588] [2024-11-09 01:25:38,234 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 01:25:38,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307779416] [2024-11-09 01:25:38,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307779416] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:25:38,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1277116021] [2024-11-09 01:25:38,237 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2024-11-09 01:25:38,237 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:25:38,238 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:25:38,238 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:25:38,238 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:25:39,164 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2024-11-09 01:25:39,173 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 64 for LOIs [2024-11-09 01:25:39,184 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:25:51,766 WARN L286 SmtUtils]: Spent 10.85s on a formula simplification. DAG size of input: 106 DAG size of output: 104 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 01:26:00,564 WARN L286 SmtUtils]: Spent 6.37s on a formula simplification. DAG size of input: 109 DAG size of output: 107 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 01:26:07,884 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6204#(and (<= 1 |#StackHeapBarrier|) (<= 1 ~counter~0) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-09 01:26:07,885 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:26:07,885 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 01:26:07,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2024-11-09 01:26:07,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075006297] [2024-11-09 01:26:07,885 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 01:26:07,885 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-09 01:26:07,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:26:07,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-09 01:26:07,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=906, Unknown=3, NotChecked=0, Total=1056 [2024-11-09 01:26:07,887 INFO L87 Difference]: Start difference. First operand 116 states and 139 transitions. Second operand has 18 states, 16 states have (on average 2.3125) internal successors, (37), 14 states have internal predecessors, (37), 12 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 11 states have call predecessors, (24), 10 states have call successors, (24) [2024-11-09 01:26:11,226 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-09 01:26:13,266 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-09 01:26:13,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:26:13,800 INFO L93 Difference]: Finished difference Result 138 states and 164 transitions. [2024-11-09 01:26:13,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-09 01:26:13,801 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.3125) internal successors, (37), 14 states have internal predecessors, (37), 12 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 11 states have call predecessors, (24), 10 states have call successors, (24) Word has length 78 [2024-11-09 01:26:13,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:26:13,802 INFO L225 Difference]: With dead ends: 138 [2024-11-09 01:26:13,803 INFO L226 Difference]: Without dead ends: 120 [2024-11-09 01:26:13,803 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 199 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 32.6s TimeCoverageRelationStatistics Valid=168, Invalid=1019, Unknown=3, NotChecked=0, Total=1190 [2024-11-09 01:26:13,804 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 15 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 39 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2024-11-09 01:26:13,805 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 222 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 235 Invalid, 2 Unknown, 0 Unchecked, 5.4s Time] [2024-11-09 01:26:13,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2024-11-09 01:26:13,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2024-11-09 01:26:13,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 72 states have (on average 1.0694444444444444) internal successors, (77), 75 states have internal predecessors, (77), 31 states have call successors, (31), 16 states have call predecessors, (31), 16 states have return successors, (29), 28 states have call predecessors, (29), 29 states have call successors, (29) [2024-11-09 01:26:13,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 137 transitions. [2024-11-09 01:26:13,875 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 137 transitions. Word has length 78 [2024-11-09 01:26:13,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:26:13,876 INFO L471 AbstractCegarLoop]: Abstraction has 120 states and 137 transitions. [2024-11-09 01:26:13,876 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.3125) internal successors, (37), 14 states have internal predecessors, (37), 12 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 11 states have call predecessors, (24), 10 states have call successors, (24) [2024-11-09 01:26:13,877 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 137 transitions. [2024-11-09 01:26:13,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2024-11-09 01:26:13,878 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:26:13,878 INFO L215 NwaCegarLoop]: trace histogram [13, 12, 12, 5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:26:13,904 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ce67df9-feb2-4a44-8d60-1fea71697500/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-09 01:26:14,083 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ce67df9-feb2-4a44-8d60-1fea71697500/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-09 01:26:14,083 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:26:14,084 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:26:14,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1024952444, now seen corresponding path program 2 times [2024-11-09 01:26:14,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:26:14,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952296356] [2024-11-09 01:26:14,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:26:14,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:26:14,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:26:14,505 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 24 proven. 44 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2024-11-09 01:26:14,505 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:26:14,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952296356] [2024-11-09 01:26:14,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952296356] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:26:14,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996902692] [2024-11-09 01:26:14,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 01:26:14,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:26:14,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ce67df9-feb2-4a44-8d60-1fea71697500/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:26:14,508 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ce67df9-feb2-4a44-8d60-1fea71697500/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:26:14,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ce67df9-feb2-4a44-8d60-1fea71697500/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-09 01:26:14,748 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-09 01:26:14,748 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 01:26:14,750 INFO L255 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-09 01:26:14,759 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:26:15,159 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 24 proven. 260 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-09 01:26:15,159 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:26:15,690 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 24 proven. 44 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2024-11-09 01:26:15,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996902692] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:26:15,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [264418291] [2024-11-09 01:26:15,695 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 01:26:15,696 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:26:15,696 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:26:15,696 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:26:15,696 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:26:16,927 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2024-11-09 01:26:16,940 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 64 for LOIs [2024-11-09 01:26:16,960 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:26:29,948 WARN L286 SmtUtils]: Spent 12.06s on a formula simplification. DAG size of input: 106 DAG size of output: 106 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 01:26:43,257 WARN L286 SmtUtils]: Spent 12.51s on a formula simplification. DAG size of input: 109 DAG size of output: 108 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 01:26:53,069 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7161#(and (<= 1 |#StackHeapBarrier|) (<= 1 ~counter~0) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-09 01:26:53,069 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:26:53,069 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:26:53,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 8] total 16 [2024-11-09 01:26:53,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638046863] [2024-11-09 01:26:53,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:26:53,070 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-09 01:26:53,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:26:53,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-09 01:26:53,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=724, Unknown=3, NotChecked=0, Total=930 [2024-11-09 01:26:53,072 INFO L87 Difference]: Start difference. First operand 120 states and 137 transitions. Second operand has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 12 states have call successors, (43), 7 states have call predecessors, (43), 6 states have return successors, (42), 11 states have call predecessors, (42), 11 states have call successors, (42) [2024-11-09 01:26:53,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:26:53,790 INFO L93 Difference]: Finished difference Result 214 states and 227 transitions. [2024-11-09 01:26:53,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-09 01:26:53,791 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 12 states have call successors, (43), 7 states have call predecessors, (43), 6 states have return successors, (42), 11 states have call predecessors, (42), 11 states have call successors, (42) Word has length 86 [2024-11-09 01:26:53,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:26:53,793 INFO L225 Difference]: With dead ends: 214 [2024-11-09 01:26:53,793 INFO L226 Difference]: Without dead ends: 198 [2024-11-09 01:26:53,794 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 36.8s TimeCoverageRelationStatistics Valid=303, Invalid=1176, Unknown=3, NotChecked=0, Total=1482 [2024-11-09 01:26:53,795 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 51 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 01:26:53,795 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 113 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 01:26:53,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2024-11-09 01:26:53,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 194. [2024-11-09 01:26:53,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 126 states have (on average 1.0317460317460319) internal successors, (130), 127 states have internal predecessors, (130), 36 states have call successors, (36), 31 states have call predecessors, (36), 31 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2024-11-09 01:26:53,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 201 transitions. [2024-11-09 01:26:53,871 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 201 transitions. Word has length 86 [2024-11-09 01:26:53,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:26:53,877 INFO L471 AbstractCegarLoop]: Abstraction has 194 states and 201 transitions. [2024-11-09 01:26:53,878 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 12 states have call successors, (43), 7 states have call predecessors, (43), 6 states have return successors, (42), 11 states have call predecessors, (42), 11 states have call successors, (42) [2024-11-09 01:26:53,878 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 201 transitions. [2024-11-09 01:26:53,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2024-11-09 01:26:53,880 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:26:53,880 INFO L215 NwaCegarLoop]: trace histogram [23, 22, 22, 8, 8, 8, 8, 8, 7, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:26:53,889 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ce67df9-feb2-4a44-8d60-1fea71697500/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-09 01:26:54,081 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ce67df9-feb2-4a44-8d60-1fea71697500/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:26:54,081 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:26:54,081 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:26:54,082 INFO L85 PathProgramCache]: Analyzing trace with hash 619834125, now seen corresponding path program 7 times [2024-11-09 01:26:54,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:26:54,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069132804] [2024-11-09 01:26:54,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:26:54,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:26:54,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 01:26:54,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1934098122] [2024-11-09 01:26:54,215 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 01:26:54,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:26:54,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ce67df9-feb2-4a44-8d60-1fea71697500/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:26:54,217 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ce67df9-feb2-4a44-8d60-1fea71697500/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:26:54,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4ce67df9-feb2-4a44-8d60-1fea71697500/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-09 01:26:55,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:26:55,050 INFO L255 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 61 conjuncts are in the unsatisfiable core [2024-11-09 01:26:55,057 INFO L278 TraceCheckSpWp]: Computing forward predicates...