./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem03_label02.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e37bd54f-306d-4c6f-abb2-eef17c756557/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e37bd54f-306d-4c6f-abb2-eef17c756557/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e37bd54f-306d-4c6f-abb2-eef17c756557/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e37bd54f-306d-4c6f-abb2-eef17c756557/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem03_label02.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e37bd54f-306d-4c6f-abb2-eef17c756557/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e37bd54f-306d-4c6f-abb2-eef17c756557/bin/utaipan-verify-t7M7D8N6sZ --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 940f009ebef4e6f688860c69fe317a06471b0d96e24220f1e9007ff15bc7124f --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 04:14:01,516 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 04:14:01,643 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e37bd54f-306d-4c6f-abb2-eef17c756557/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 04:14:01,652 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 04:14:01,653 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 04:14:01,707 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 04:14:01,708 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 04:14:01,708 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 04:14:01,709 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 04:14:01,715 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 04:14:01,715 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 04:14:01,717 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 04:14:01,717 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 04:14:01,719 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 04:14:01,719 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 04:14:01,720 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 04:14:01,720 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 04:14:01,721 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 04:14:01,721 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 04:14:01,722 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 04:14:01,722 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 04:14:01,723 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 04:14:01,724 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 04:14:01,724 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 04:14:01,725 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 04:14:01,725 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 04:14:01,726 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 04:14:01,726 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 04:14:01,727 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 04:14:01,727 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 04:14:01,728 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 04:14:01,729 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 04:14:01,743 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 04:14:01,743 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 04:14:01,744 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 04:14:01,744 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 04:14:01,744 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:14:01,745 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 04:14:01,745 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 04:14:01,745 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 04:14:01,745 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 04:14:01,746 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 04:14:01,746 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 04:14:01,746 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 04:14:01,747 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 04:14:01,747 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_e37bd54f-306d-4c6f-abb2-eef17c756557/bin/utaipan-verify-t7M7D8N6sZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e37bd54f-306d-4c6f-abb2-eef17c756557/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 940f009ebef4e6f688860c69fe317a06471b0d96e24220f1e9007ff15bc7124f [2023-11-19 04:14:02,101 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 04:14:02,138 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 04:14:02,141 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 04:14:02,142 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 04:14:02,143 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 04:14:02,145 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e37bd54f-306d-4c6f-abb2-eef17c756557/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/eca-rers2012/Problem03_label02.c [2023-11-19 04:14:05,251 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 04:14:05,703 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 04:14:05,704 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e37bd54f-306d-4c6f-abb2-eef17c756557/sv-benchmarks/c/eca-rers2012/Problem03_label02.c [2023-11-19 04:14:05,726 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e37bd54f-306d-4c6f-abb2-eef17c756557/bin/utaipan-verify-t7M7D8N6sZ/data/74eab81b2/354802068d224865b3a76d407266517b/FLAG64ec7a55e [2023-11-19 04:14:05,744 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e37bd54f-306d-4c6f-abb2-eef17c756557/bin/utaipan-verify-t7M7D8N6sZ/data/74eab81b2/354802068d224865b3a76d407266517b [2023-11-19 04:14:05,748 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 04:14:05,749 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 04:14:05,750 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 04:14:05,750 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 04:14:05,759 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 04:14:05,760 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:14:05" (1/1) ... [2023-11-19 04:14:05,761 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19331b6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:14:05, skipping insertion in model container [2023-11-19 04:14:05,762 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:14:05" (1/1) ... [2023-11-19 04:14:05,865 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 04:14:06,504 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e37bd54f-306d-4c6f-abb2-eef17c756557/sv-benchmarks/c/eca-rers2012/Problem03_label02.c[61770,61783] [2023-11-19 04:14:06,535 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:14:06,551 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 04:14:06,830 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e37bd54f-306d-4c6f-abb2-eef17c756557/sv-benchmarks/c/eca-rers2012/Problem03_label02.c[61770,61783] [2023-11-19 04:14:06,835 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:14:06,856 INFO L206 MainTranslator]: Completed translation [2023-11-19 04:14:06,856 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:14:06 WrapperNode [2023-11-19 04:14:06,857 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 04:14:06,858 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 04:14:06,858 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 04:14:06,858 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 04:14:06,867 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:14:06" (1/1) ... [2023-11-19 04:14:06,905 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:14:06" (1/1) ... [2023-11-19 04:14:07,007 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1772 [2023-11-19 04:14:07,007 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 04:14:07,008 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 04:14:07,008 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 04:14:07,009 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 04:14:07,019 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:14:06" (1/1) ... [2023-11-19 04:14:07,020 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:14:06" (1/1) ... [2023-11-19 04:14:07,034 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:14:06" (1/1) ... [2023-11-19 04:14:07,035 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:14:06" (1/1) ... [2023-11-19 04:14:07,083 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:14:06" (1/1) ... [2023-11-19 04:14:07,094 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:14:06" (1/1) ... [2023-11-19 04:14:07,114 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:14:06" (1/1) ... [2023-11-19 04:14:07,123 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:14:06" (1/1) ... [2023-11-19 04:14:07,138 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 04:14:07,139 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 04:14:07,139 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 04:14:07,139 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 04:14:07,140 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:14:06" (1/1) ... [2023-11-19 04:14:07,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:14:07,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e37bd54f-306d-4c6f-abb2-eef17c756557/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:14:07,188 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e37bd54f-306d-4c6f-abb2-eef17c756557/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 04:14:07,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e37bd54f-306d-4c6f-abb2-eef17c756557/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 04:14:07,286 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 04:14:07,286 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 04:14:07,286 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 04:14:07,286 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 04:14:07,456 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 04:14:07,469 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 04:14:09,668 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 04:14:10,091 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 04:14:10,091 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 04:14:10,097 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:14:10 BoogieIcfgContainer [2023-11-19 04:14:10,097 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 04:14:10,100 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 04:14:10,100 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 04:14:10,103 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 04:14:10,104 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:14:05" (1/3) ... [2023-11-19 04:14:10,104 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a6eddf7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:14:10, skipping insertion in model container [2023-11-19 04:14:10,104 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:14:06" (2/3) ... [2023-11-19 04:14:10,105 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a6eddf7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:14:10, skipping insertion in model container [2023-11-19 04:14:10,105 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:14:10" (3/3) ... [2023-11-19 04:14:10,106 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label02.c [2023-11-19 04:14:10,127 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 04:14:10,127 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 04:14:10,184 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 04:14:10,191 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=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;@40414147, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 04:14:10,191 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 04:14:10,197 INFO L276 IsEmpty]: Start isEmpty. Operand has 148 states, 146 states have (on average 1.9726027397260273) internal successors, (288), 147 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:14:10,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2023-11-19 04:14:10,213 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:14:10,213 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:14:10,214 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:14:10,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:14:10,220 INFO L85 PathProgramCache]: Analyzing trace with hash 209358141, now seen corresponding path program 1 times [2023-11-19 04:14:10,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:14:10,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993363449] [2023-11-19 04:14:10,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:14:10,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:14:10,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:14:11,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:14:11,316 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:14:11,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993363449] [2023-11-19 04:14:11,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993363449] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:14:11,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:14:11,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 04:14:11,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120123389] [2023-11-19 04:14:11,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:14:11,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:14:11,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:14:11,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:14:11,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:14:11,359 INFO L87 Difference]: Start difference. First operand has 148 states, 146 states have (on average 1.9726027397260273) internal successors, (288), 147 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:14:12,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:14:12,521 INFO L93 Difference]: Finished difference Result 440 states and 860 transitions. [2023-11-19 04:14:12,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:14:12,525 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2023-11-19 04:14:12,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:14:12,541 INFO L225 Difference]: With dead ends: 440 [2023-11-19 04:14:12,541 INFO L226 Difference]: Without dead ends: 289 [2023-11-19 04:14:12,545 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:14:12,552 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 38 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:14:12,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 49 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-19 04:14:12,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2023-11-19 04:14:12,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 289. [2023-11-19 04:14:12,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 1.8055555555555556) internal successors, (520), 288 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:14:12,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 520 transitions. [2023-11-19 04:14:12,653 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 520 transitions. Word has length 143 [2023-11-19 04:14:12,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:14:12,658 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 520 transitions. [2023-11-19 04:14:12,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:14:12,658 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 520 transitions. [2023-11-19 04:14:12,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2023-11-19 04:14:12,672 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:14:12,672 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:14:12,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 04:14:12,674 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:14:12,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:14:12,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1322634023, now seen corresponding path program 1 times [2023-11-19 04:14:12,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:14:12,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705128286] [2023-11-19 04:14:12,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:14:12,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:14:12,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:14:13,166 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:14:13,167 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:14:13,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705128286] [2023-11-19 04:14:13,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705128286] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:14:13,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:14:13,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 04:14:13,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686712062] [2023-11-19 04:14:13,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:14:13,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:14:13,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:14:13,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:14:13,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:14:13,176 INFO L87 Difference]: Start difference. First operand 289 states and 520 transitions. Second operand has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 2 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:14:14,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:14:14,024 INFO L93 Difference]: Finished difference Result 863 states and 1557 transitions. [2023-11-19 04:14:14,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:14:14,026 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 2 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 148 [2023-11-19 04:14:14,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:14:14,030 INFO L225 Difference]: With dead ends: 863 [2023-11-19 04:14:14,030 INFO L226 Difference]: Without dead ends: 575 [2023-11-19 04:14:14,033 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:14:14,034 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 164 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-19 04:14:14,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 70 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 502 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-19 04:14:14,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2023-11-19 04:14:14,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 575. [2023-11-19 04:14:14,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 1.6724738675958188) internal successors, (960), 574 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:14:14,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 960 transitions. [2023-11-19 04:14:14,061 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 960 transitions. Word has length 148 [2023-11-19 04:14:14,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:14:14,061 INFO L495 AbstractCegarLoop]: Abstraction has 575 states and 960 transitions. [2023-11-19 04:14:14,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 2 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:14:14,062 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 960 transitions. [2023-11-19 04:14:14,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2023-11-19 04:14:14,065 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:14:14,065 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:14:14,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 04:14:14,066 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:14:14,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:14:14,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1094398428, now seen corresponding path program 1 times [2023-11-19 04:14:14,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:14:14,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400605382] [2023-11-19 04:14:14,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:14:14,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:14:14,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:14:14,311 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:14:14,311 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:14:14,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400605382] [2023-11-19 04:14:14,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400605382] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:14:14,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:14:14,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 04:14:14,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648268392] [2023-11-19 04:14:14,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:14:14,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:14:14,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:14:14,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:14:14,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:14:14,315 INFO L87 Difference]: Start difference. First operand 575 states and 960 transitions. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:14:15,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:14:15,167 INFO L93 Difference]: Finished difference Result 1721 states and 2877 transitions. [2023-11-19 04:14:15,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:14:15,167 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 151 [2023-11-19 04:14:15,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:14:15,175 INFO L225 Difference]: With dead ends: 1721 [2023-11-19 04:14:15,175 INFO L226 Difference]: Without dead ends: 1147 [2023-11-19 04:14:15,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:14:15,178 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 157 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-19 04:14:15,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 27 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 450 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-19 04:14:15,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2023-11-19 04:14:15,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 1147. [2023-11-19 04:14:15,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1147 states, 1146 states have (on average 1.62565445026178) internal successors, (1863), 1146 states have internal predecessors, (1863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:14:15,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 1863 transitions. [2023-11-19 04:14:15,213 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 1863 transitions. Word has length 151 [2023-11-19 04:14:15,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:14:15,214 INFO L495 AbstractCegarLoop]: Abstraction has 1147 states and 1863 transitions. [2023-11-19 04:14:15,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:14:15,214 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 1863 transitions. [2023-11-19 04:14:15,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2023-11-19 04:14:15,219 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:14:15,219 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:14:15,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 04:14:15,219 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:14:15,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:14:15,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1051089021, now seen corresponding path program 1 times [2023-11-19 04:14:15,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:14:15,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92023015] [2023-11-19 04:14:15,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:14:15,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:14:15,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:14:15,655 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 04:14:15,655 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:14:15,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92023015] [2023-11-19 04:14:15,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92023015] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:14:15,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:14:15,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:14:15,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247057441] [2023-11-19 04:14:15,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:14:15,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:14:15,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:14:15,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:14:15,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:14:15,660 INFO L87 Difference]: Start difference. First operand 1147 states and 1863 transitions. Second operand has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:14:16,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:14:16,620 INFO L93 Difference]: Finished difference Result 3437 states and 5586 transitions. [2023-11-19 04:14:16,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:14:16,620 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 163 [2023-11-19 04:14:16,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:14:16,641 INFO L225 Difference]: With dead ends: 3437 [2023-11-19 04:14:16,641 INFO L226 Difference]: Without dead ends: 2291 [2023-11-19 04:14:16,644 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:14:16,656 INFO L413 NwaCegarLoop]: 258 mSDtfsCounter, 152 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-19 04:14:16,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 262 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-19 04:14:16,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2291 states. [2023-11-19 04:14:16,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2291 to 2291. [2023-11-19 04:14:16,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2291 states, 2290 states have (on average 1.4017467248908297) internal successors, (3210), 2290 states have internal predecessors, (3210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:14:16,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2291 states to 2291 states and 3210 transitions. [2023-11-19 04:14:16,735 INFO L78 Accepts]: Start accepts. Automaton has 2291 states and 3210 transitions. Word has length 163 [2023-11-19 04:14:16,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:14:16,736 INFO L495 AbstractCegarLoop]: Abstraction has 2291 states and 3210 transitions. [2023-11-19 04:14:16,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:14:16,736 INFO L276 IsEmpty]: Start isEmpty. Operand 2291 states and 3210 transitions. [2023-11-19 04:14:16,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2023-11-19 04:14:16,743 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:14:16,743 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:14:16,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 04:14:16,743 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:14:16,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:14:16,744 INFO L85 PathProgramCache]: Analyzing trace with hash 102985989, now seen corresponding path program 1 times [2023-11-19 04:14:16,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:14:16,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236814311] [2023-11-19 04:14:16,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:14:16,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:14:16,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:14:17,183 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 04:14:17,184 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:14:17,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236814311] [2023-11-19 04:14:17,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236814311] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:14:17,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:14:17,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:14:17,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800118372] [2023-11-19 04:14:17,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:14:17,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:14:17,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:14:17,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:14:17,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:14:17,186 INFO L87 Difference]: Start difference. First operand 2291 states and 3210 transitions. Second operand has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:14:18,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:14:18,079 INFO L93 Difference]: Finished difference Result 5725 states and 7992 transitions. [2023-11-19 04:14:18,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:14:18,080 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 176 [2023-11-19 04:14:18,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:14:18,099 INFO L225 Difference]: With dead ends: 5725 [2023-11-19 04:14:18,099 INFO L226 Difference]: Without dead ends: 3435 [2023-11-19 04:14:18,103 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:14:18,104 INFO L413 NwaCegarLoop]: 264 mSDtfsCounter, 129 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-19 04:14:18,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 269 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-19 04:14:18,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3435 states. [2023-11-19 04:14:18,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3435 to 3435. [2023-11-19 04:14:18,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3435 states, 3434 states have (on average 1.3453698311007571) internal successors, (4620), 3434 states have internal predecessors, (4620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:14:18,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3435 states to 3435 states and 4620 transitions. [2023-11-19 04:14:18,219 INFO L78 Accepts]: Start accepts. Automaton has 3435 states and 4620 transitions. Word has length 176 [2023-11-19 04:14:18,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:14:18,220 INFO L495 AbstractCegarLoop]: Abstraction has 3435 states and 4620 transitions. [2023-11-19 04:14:18,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:14:18,220 INFO L276 IsEmpty]: Start isEmpty. Operand 3435 states and 4620 transitions. [2023-11-19 04:14:18,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2023-11-19 04:14:18,229 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:14:18,229 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:14:18,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 04:14:18,230 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:14:18,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:14:18,230 INFO L85 PathProgramCache]: Analyzing trace with hash 1441049025, now seen corresponding path program 1 times [2023-11-19 04:14:18,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:14:18,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897879001] [2023-11-19 04:14:18,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:14:18,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:14:18,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:14:18,730 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 37 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:14:18,730 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:14:18,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897879001] [2023-11-19 04:14:18,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897879001] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:14:18,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855020993] [2023-11-19 04:14:18,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:14:18,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:14:18,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e37bd54f-306d-4c6f-abb2-eef17c756557/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:14:18,739 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e37bd54f-306d-4c6f-abb2-eef17c756557/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:14:18,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e37bd54f-306d-4c6f-abb2-eef17c756557/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 04:14:19,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:14:19,018 INFO L262 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 04:14:19,035 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:14:19,264 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 04:14:19,265 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:14:19,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855020993] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:14:19,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:14:19,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-11-19 04:14:19,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817828676] [2023-11-19 04:14:19,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:14:19,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:14:19,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:14:19,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:14:19,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:14:19,272 INFO L87 Difference]: Start difference. First operand 3435 states and 4620 transitions. Second operand has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:14:20,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:14:20,133 INFO L93 Difference]: Finished difference Result 10301 states and 13857 transitions. [2023-11-19 04:14:20,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:14:20,140 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 181 [2023-11-19 04:14:20,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:14:20,175 INFO L225 Difference]: With dead ends: 10301 [2023-11-19 04:14:20,175 INFO L226 Difference]: Without dead ends: 6867 [2023-11-19 04:14:20,180 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:14:20,181 INFO L413 NwaCegarLoop]: 281 mSDtfsCounter, 5 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-19 04:14:20,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 298 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-19 04:14:20,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6867 states. [2023-11-19 04:14:20,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6867 to 6867. [2023-11-19 04:14:20,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6867 states, 6866 states have (on average 1.324206233614914) internal successors, (9092), 6866 states have internal predecessors, (9092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:14:20,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6867 states to 6867 states and 9092 transitions. [2023-11-19 04:14:20,407 INFO L78 Accepts]: Start accepts. Automaton has 6867 states and 9092 transitions. Word has length 181 [2023-11-19 04:14:20,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:14:20,408 INFO L495 AbstractCegarLoop]: Abstraction has 6867 states and 9092 transitions. [2023-11-19 04:14:20,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:14:20,408 INFO L276 IsEmpty]: Start isEmpty. Operand 6867 states and 9092 transitions. [2023-11-19 04:14:20,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2023-11-19 04:14:20,426 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:14:20,427 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:14:20,449 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e37bd54f-306d-4c6f-abb2-eef17c756557/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-19 04:14:20,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e37bd54f-306d-4c6f-abb2-eef17c756557/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:14:20,644 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:14:20,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:14:20,645 INFO L85 PathProgramCache]: Analyzing trace with hash -2067543450, now seen corresponding path program 1 times [2023-11-19 04:14:20,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:14:20,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757712457] [2023-11-19 04:14:20,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:14:20,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:14:20,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:14:21,275 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:14:21,275 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:14:21,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757712457] [2023-11-19 04:14:21,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757712457] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:14:21,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:14:21,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 04:14:21,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252986047] [2023-11-19 04:14:21,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:14:21,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:14:21,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:14:21,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:14:21,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:14:21,279 INFO L87 Difference]: Start difference. First operand 6867 states and 9092 transitions. Second operand has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 2 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:14:22,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:14:22,230 INFO L93 Difference]: Finished difference Result 16021 states and 21314 transitions. [2023-11-19 04:14:22,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:14:22,231 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 2 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 184 [2023-11-19 04:14:22,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:14:22,284 INFO L225 Difference]: With dead ends: 16021 [2023-11-19 04:14:22,284 INFO L226 Difference]: Without dead ends: 9155 [2023-11-19 04:14:22,293 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:14:22,294 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 116 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-19 04:14:22,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 86 Invalid, 614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 579 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-19 04:14:22,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9155 states. [2023-11-19 04:14:22,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9155 to 9155. [2023-11-19 04:14:22,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9155 states, 9154 states have (on average 1.3209525890321172) internal successors, (12092), 9154 states have internal predecessors, (12092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:14:22,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9155 states to 9155 states and 12092 transitions. [2023-11-19 04:14:22,563 INFO L78 Accepts]: Start accepts. Automaton has 9155 states and 12092 transitions. Word has length 184 [2023-11-19 04:14:22,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:14:22,564 INFO L495 AbstractCegarLoop]: Abstraction has 9155 states and 12092 transitions. [2023-11-19 04:14:22,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 2 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:14:22,564 INFO L276 IsEmpty]: Start isEmpty. Operand 9155 states and 12092 transitions. [2023-11-19 04:14:22,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2023-11-19 04:14:22,583 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:14:22,583 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:14:22,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 04:14:22,585 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:14:22,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:14:22,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1304618623, now seen corresponding path program 1 times [2023-11-19 04:14:22,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:14:22,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71054383] [2023-11-19 04:14:22,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:14:22,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:14:22,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:14:23,275 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 47 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:14:23,275 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:14:23,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71054383] [2023-11-19 04:14:23,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71054383] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:14:23,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984327706] [2023-11-19 04:14:23,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:14:23,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:14:23,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e37bd54f-306d-4c6f-abb2-eef17c756557/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:14:23,277 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e37bd54f-306d-4c6f-abb2-eef17c756557/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:14:23,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e37bd54f-306d-4c6f-abb2-eef17c756557/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 04:14:23,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:14:23,496 INFO L262 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 04:14:23,502 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:14:23,722 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 04:14:23,722 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:14:23,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984327706] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:14:23,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:14:23,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-11-19 04:14:23,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960636745] [2023-11-19 04:14:23,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:14:23,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:14:23,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:14:23,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:14:23,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:14:23,726 INFO L87 Difference]: Start difference. First operand 9155 states and 12092 transitions. Second operand has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:14:24,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:14:24,729 INFO L93 Difference]: Finished difference Result 20740 states and 27888 transitions. [2023-11-19 04:14:24,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:14:24,730 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 191 [2023-11-19 04:14:24,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:14:24,783 INFO L225 Difference]: With dead ends: 20740 [2023-11-19 04:14:24,783 INFO L226 Difference]: Without dead ends: 11872 [2023-11-19 04:14:24,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:14:24,796 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 47 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-19 04:14:24,796 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 24 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-19 04:14:24,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11872 states. [2023-11-19 04:14:25,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11872 to 11872. [2023-11-19 04:14:25,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11872 states, 11871 states have (on average 1.3515289360626737) internal successors, (16044), 11871 states have internal predecessors, (16044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:14:25,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11872 states to 11872 states and 16044 transitions. [2023-11-19 04:14:25,066 INFO L78 Accepts]: Start accepts. Automaton has 11872 states and 16044 transitions. Word has length 191 [2023-11-19 04:14:25,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:14:25,067 INFO L495 AbstractCegarLoop]: Abstraction has 11872 states and 16044 transitions. [2023-11-19 04:14:25,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:14:25,067 INFO L276 IsEmpty]: Start isEmpty. Operand 11872 states and 16044 transitions. [2023-11-19 04:14:25,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2023-11-19 04:14:25,093 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:14:25,093 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:14:25,119 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e37bd54f-306d-4c6f-abb2-eef17c756557/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 04:14:25,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e37bd54f-306d-4c6f-abb2-eef17c756557/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-19 04:14:25,308 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:14:25,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:14:25,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1816281591, now seen corresponding path program 1 times [2023-11-19 04:14:25,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:14:25,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398447019] [2023-11-19 04:14:25,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:14:25,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:14:25,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:14:26,471 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 94 proven. 6 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-11-19 04:14:26,472 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:14:26,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398447019] [2023-11-19 04:14:26,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398447019] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:14:26,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546204607] [2023-11-19 04:14:26,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:14:26,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:14:26,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e37bd54f-306d-4c6f-abb2-eef17c756557/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:14:26,474 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e37bd54f-306d-4c6f-abb2-eef17c756557/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:14:26,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e37bd54f-306d-4c6f-abb2-eef17c756557/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 04:14:26,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:14:26,724 INFO L262 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 04:14:26,731 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:14:26,833 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 155 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 04:14:26,834 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:14:26,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546204607] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:14:26,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:14:26,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-11-19 04:14:26,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965430729] [2023-11-19 04:14:26,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:14:26,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:14:26,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:14:26,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:14:26,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:14:26,851 INFO L87 Difference]: Start difference. First operand 11872 states and 16044 transitions. Second operand has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:14:27,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:14:27,852 INFO L93 Difference]: Finished difference Result 27604 states and 37808 transitions. [2023-11-19 04:14:27,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:14:27,853 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 252 [2023-11-19 04:14:27,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:14:27,886 INFO L225 Difference]: With dead ends: 27604 [2023-11-19 04:14:27,886 INFO L226 Difference]: Without dead ends: 15876 [2023-11-19 04:14:27,898 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:14:27,899 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 99 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-19 04:14:27,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 87 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-19 04:14:27,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15876 states. [2023-11-19 04:14:28,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15876 to 15876. [2023-11-19 04:14:28,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15876 states, 15875 states have (on average 1.2959370078740158) internal successors, (20573), 15875 states have internal predecessors, (20573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:14:28,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15876 states to 15876 states and 20573 transitions. [2023-11-19 04:14:28,258 INFO L78 Accepts]: Start accepts. Automaton has 15876 states and 20573 transitions. Word has length 252 [2023-11-19 04:14:28,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:14:28,259 INFO L495 AbstractCegarLoop]: Abstraction has 15876 states and 20573 transitions. [2023-11-19 04:14:28,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:14:28,259 INFO L276 IsEmpty]: Start isEmpty. Operand 15876 states and 20573 transitions. [2023-11-19 04:14:28,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2023-11-19 04:14:28,295 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:14:28,295 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:14:28,329 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e37bd54f-306d-4c6f-abb2-eef17c756557/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 04:14:28,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e37bd54f-306d-4c6f-abb2-eef17c756557/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-19 04:14:28,516 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:14:28,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:14:28,517 INFO L85 PathProgramCache]: Analyzing trace with hash -101137184, now seen corresponding path program 1 times [2023-11-19 04:14:28,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:14:28,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982202418] [2023-11-19 04:14:28,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:14:28,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:14:28,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:14:29,136 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-11-19 04:14:29,137 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:14:29,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982202418] [2023-11-19 04:14:29,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982202418] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:14:29,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:14:29,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:14:29,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779860108] [2023-11-19 04:14:29,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:14:29,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:14:29,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:14:29,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:14:29,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:14:29,140 INFO L87 Difference]: Start difference. First operand 15876 states and 20573 transitions. Second operand has 4 states, 4 states have (on average 48.25) internal successors, (193), 3 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:14:30,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:14:30,638 INFO L93 Difference]: Finished difference Result 33181 states and 43235 transitions. [2023-11-19 04:14:30,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 04:14:30,639 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 48.25) internal successors, (193), 3 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 253 [2023-11-19 04:14:30,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:14:30,674 INFO L225 Difference]: With dead ends: 33181 [2023-11-19 04:14:30,674 INFO L226 Difference]: Without dead ends: 17449 [2023-11-19 04:14:30,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:14:30,689 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 250 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 918 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 1148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 918 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-19 04:14:30,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 113 Invalid, 1148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 918 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-19 04:14:30,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17449 states. [2023-11-19 04:14:30,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17449 to 15876. [2023-11-19 04:14:30,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15876 states, 15875 states have (on average 1.2959370078740158) internal successors, (20573), 15875 states have internal predecessors, (20573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:14:31,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15876 states to 15876 states and 20573 transitions. [2023-11-19 04:14:31,095 INFO L78 Accepts]: Start accepts. Automaton has 15876 states and 20573 transitions. Word has length 253 [2023-11-19 04:14:31,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:14:31,095 INFO L495 AbstractCegarLoop]: Abstraction has 15876 states and 20573 transitions. [2023-11-19 04:14:31,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 48.25) internal successors, (193), 3 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:14:31,096 INFO L276 IsEmpty]: Start isEmpty. Operand 15876 states and 20573 transitions. [2023-11-19 04:14:31,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2023-11-19 04:14:31,134 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:14:31,135 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:14:31,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-19 04:14:31,135 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:14:31,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:14:31,136 INFO L85 PathProgramCache]: Analyzing trace with hash -711260507, now seen corresponding path program 1 times [2023-11-19 04:14:31,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:14:31,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449064805] [2023-11-19 04:14:31,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:14:31,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:14:31,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:14:31,717 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 98 proven. 6 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2023-11-19 04:14:31,717 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:14:31,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449064805] [2023-11-19 04:14:31,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449064805] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:14:31,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737886464] [2023-11-19 04:14:31,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:14:31,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:14:31,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e37bd54f-306d-4c6f-abb2-eef17c756557/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:14:31,720 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e37bd54f-306d-4c6f-abb2-eef17c756557/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:14:31,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e37bd54f-306d-4c6f-abb2-eef17c756557/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 04:14:31,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:14:31,971 INFO L262 TraceCheckSpWp]: Trace formula consists of 582 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 04:14:31,977 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:14:32,058 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 110 proven. 0 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-11-19 04:14:32,058 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:14:32,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737886464] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:14:32,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:14:32,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2023-11-19 04:14:32,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613823148] [2023-11-19 04:14:32,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:14:32,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:14:32,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:14:32,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:14:32,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:14:32,105 INFO L87 Difference]: Start difference. First operand 15876 states and 20573 transitions. Second operand has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 2 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:14:32,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:14:32,704 INFO L93 Difference]: Finished difference Result 29320 states and 38057 transitions. [2023-11-19 04:14:32,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:14:32,705 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 2 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 260 [2023-11-19 04:14:32,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:14:32,739 INFO L225 Difference]: With dead ends: 29320 [2023-11-19 04:14:32,740 INFO L226 Difference]: Without dead ends: 13588 [2023-11-19 04:14:32,758 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 259 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:14:32,759 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 227 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 04:14:32,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [227 Valid, 5 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 04:14:32,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13588 states. [2023-11-19 04:14:33,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13588 to 13588. [2023-11-19 04:14:33,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13588 states, 13587 states have (on average 1.2768087142121145) internal successors, (17348), 13587 states have internal predecessors, (17348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:14:33,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13588 states to 13588 states and 17348 transitions. [2023-11-19 04:14:33,132 INFO L78 Accepts]: Start accepts. Automaton has 13588 states and 17348 transitions. Word has length 260 [2023-11-19 04:14:33,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:14:33,133 INFO L495 AbstractCegarLoop]: Abstraction has 13588 states and 17348 transitions. [2023-11-19 04:14:33,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 2 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:14:33,133 INFO L276 IsEmpty]: Start isEmpty. Operand 13588 states and 17348 transitions. [2023-11-19 04:14:33,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2023-11-19 04:14:33,172 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:14:33,172 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:14:33,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e37bd54f-306d-4c6f-abb2-eef17c756557/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 04:14:33,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e37bd54f-306d-4c6f-abb2-eef17c756557/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-19 04:14:33,395 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:14:33,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:14:33,395 INFO L85 PathProgramCache]: Analyzing trace with hash -945825850, now seen corresponding path program 1 times [2023-11-19 04:14:33,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:14:33,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252049190] [2023-11-19 04:14:33,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:14:33,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:14:33,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:14:33,882 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 123 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:14:33,882 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:14:33,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252049190] [2023-11-19 04:14:33,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252049190] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:14:33,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:14:33,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 04:14:33,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217609318] [2023-11-19 04:14:33,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:14:33,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:14:33,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:14:33,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:14:33,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:14:33,885 INFO L87 Difference]: Start difference. First operand 13588 states and 17348 transitions. Second operand has 3 states, 3 states have (on average 89.0) internal successors, (267), 2 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:14:34,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:14:34,829 INFO L93 Difference]: Finished difference Result 30464 states and 38991 transitions. [2023-11-19 04:14:34,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:14:34,830 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 89.0) internal successors, (267), 2 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 267 [2023-11-19 04:14:34,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:14:34,864 INFO L225 Difference]: With dead ends: 30464 [2023-11-19 04:14:34,864 INFO L226 Difference]: Without dead ends: 17020 [2023-11-19 04:14:34,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:14:34,875 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 41 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-19 04:14:34,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 33 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-19 04:14:34,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17020 states. [2023-11-19 04:14:35,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17020 to 16734. [2023-11-19 04:14:35,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16734 states, 16733 states have (on average 1.262236299527879) internal successors, (21121), 16733 states have internal predecessors, (21121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:14:35,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16734 states to 16734 states and 21121 transitions. [2023-11-19 04:14:35,206 INFO L78 Accepts]: Start accepts. Automaton has 16734 states and 21121 transitions. Word has length 267 [2023-11-19 04:14:35,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:14:35,207 INFO L495 AbstractCegarLoop]: Abstraction has 16734 states and 21121 transitions. [2023-11-19 04:14:35,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.0) internal successors, (267), 2 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:14:35,207 INFO L276 IsEmpty]: Start isEmpty. Operand 16734 states and 21121 transitions. [2023-11-19 04:14:35,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2023-11-19 04:14:35,229 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:14:35,229 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:14:35,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-19 04:14:35,230 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:14:35,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:14:35,231 INFO L85 PathProgramCache]: Analyzing trace with hash 2073369803, now seen corresponding path program 1 times [2023-11-19 04:14:35,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:14:35,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294950872] [2023-11-19 04:14:35,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:14:35,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:14:35,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:14:37,289 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 130 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:14:37,290 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:14:37,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294950872] [2023-11-19 04:14:37,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294950872] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:14:37,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758805163] [2023-11-19 04:14:37,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:14:37,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:14:37,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e37bd54f-306d-4c6f-abb2-eef17c756557/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:14:37,296 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e37bd54f-306d-4c6f-abb2-eef17c756557/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:14:37,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e37bd54f-306d-4c6f-abb2-eef17c756557/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 04:14:37,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:14:37,561 INFO L262 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 04:14:37,568 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:14:38,687 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 04:14:38,687 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:14:38,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758805163] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:14:38,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:14:38,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2023-11-19 04:14:38,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295393796] [2023-11-19 04:14:38,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:14:38,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:14:38,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:14:38,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:14:38,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 04:14:38,691 INFO L87 Difference]: Start difference. First operand 16734 states and 21121 transitions. Second operand has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:14:39,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:14:39,713 INFO L93 Difference]: Finished difference Result 37471 states and 47462 transitions. [2023-11-19 04:14:39,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:14:39,715 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 274 [2023-11-19 04:14:39,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:14:39,761 INFO L225 Difference]: With dead ends: 37471 [2023-11-19 04:14:39,761 INFO L226 Difference]: Without dead ends: 20881 [2023-11-19 04:14:39,771 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 273 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 04:14:39,772 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 8 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-19 04:14:39,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 96 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-19 04:14:39,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20881 states. [2023-11-19 04:14:40,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20881 to 20881. [2023-11-19 04:14:40,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20881 states, 20880 states have (on average 1.2365900383141764) internal successors, (25820), 20880 states have internal predecessors, (25820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:14:40,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20881 states to 20881 states and 25820 transitions. [2023-11-19 04:14:40,240 INFO L78 Accepts]: Start accepts. Automaton has 20881 states and 25820 transitions. Word has length 274 [2023-11-19 04:14:40,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:14:40,241 INFO L495 AbstractCegarLoop]: Abstraction has 20881 states and 25820 transitions. [2023-11-19 04:14:40,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:14:40,242 INFO L276 IsEmpty]: Start isEmpty. Operand 20881 states and 25820 transitions. [2023-11-19 04:14:40,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2023-11-19 04:14:40,269 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:14:40,269 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:14:40,295 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e37bd54f-306d-4c6f-abb2-eef17c756557/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-19 04:14:40,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e37bd54f-306d-4c6f-abb2-eef17c756557/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-19 04:14:40,484 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:14:40,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:14:40,484 INFO L85 PathProgramCache]: Analyzing trace with hash 489621198, now seen corresponding path program 1 times [2023-11-19 04:14:40,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:14:40,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363650012] [2023-11-19 04:14:40,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:14:40,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:14:40,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:14:40,927 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 134 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-11-19 04:14:40,927 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:14:40,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363650012] [2023-11-19 04:14:40,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363650012] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:14:40,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:14:40,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 04:14:40,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112259611] [2023-11-19 04:14:40,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:14:40,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:14:40,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:14:40,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:14:40,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:14:40,930 INFO L87 Difference]: Start difference. First operand 20881 states and 25820 transitions. Second operand has 3 states, 3 states have (on average 73.0) internal successors, (219), 2 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:14:41,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:14:41,737 INFO L93 Difference]: Finished difference Result 46480 states and 57442 transitions. [2023-11-19 04:14:41,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:14:41,738 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 2 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 279 [2023-11-19 04:14:41,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:14:41,784 INFO L225 Difference]: With dead ends: 46480 [2023-11-19 04:14:41,784 INFO L226 Difference]: Without dead ends: 25743 [2023-11-19 04:14:41,797 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:14:41,799 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 84 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-19 04:14:41,800 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 79 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-19 04:14:41,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25743 states. [2023-11-19 04:14:42,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25743 to 24742. [2023-11-19 04:14:42,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24742 states, 24741 states have (on average 1.2400468857362272) internal successors, (30680), 24741 states have internal predecessors, (30680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:14:42,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24742 states to 24742 states and 30680 transitions. [2023-11-19 04:14:42,315 INFO L78 Accepts]: Start accepts. Automaton has 24742 states and 30680 transitions. Word has length 279 [2023-11-19 04:14:42,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:14:42,315 INFO L495 AbstractCegarLoop]: Abstraction has 24742 states and 30680 transitions. [2023-11-19 04:14:42,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 2 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:14:42,316 INFO L276 IsEmpty]: Start isEmpty. Operand 24742 states and 30680 transitions. [2023-11-19 04:14:42,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2023-11-19 04:14:42,338 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:14:42,339 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:14:42,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-19 04:14:42,339 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:14:42,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:14:42,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1144939048, now seen corresponding path program 1 times [2023-11-19 04:14:42,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:14:42,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880569366] [2023-11-19 04:14:42,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:14:42,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:14:42,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:14:42,641 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 216 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:14:42,642 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:14:42,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880569366] [2023-11-19 04:14:42,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880569366] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:14:42,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:14:42,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:14:42,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655131174] [2023-11-19 04:14:42,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:14:42,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:14:42,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:14:42,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:14:42,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:14:42,645 INFO L87 Difference]: Start difference. First operand 24742 states and 30680 transitions. Second operand has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:14:43,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:14:43,537 INFO L93 Difference]: Finished difference Result 54345 states and 67522 transitions. [2023-11-19 04:14:43,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:14:43,538 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 300 [2023-11-19 04:14:43,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:14:43,583 INFO L225 Difference]: With dead ends: 54345 [2023-11-19 04:14:43,584 INFO L226 Difference]: Without dead ends: 29747 [2023-11-19 04:14:43,599 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:14:43,600 INFO L413 NwaCegarLoop]: 230 mSDtfsCounter, 111 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-19 04:14:43,600 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 234 Invalid, 542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-19 04:14:43,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29747 states. [2023-11-19 04:14:44,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29747 to 26744. [2023-11-19 04:14:44,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26744 states, 26743 states have (on average 1.1999775642224133) internal successors, (32091), 26743 states have internal predecessors, (32091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:14:44,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26744 states to 26744 states and 32091 transitions. [2023-11-19 04:14:44,184 INFO L78 Accepts]: Start accepts. Automaton has 26744 states and 32091 transitions. Word has length 300 [2023-11-19 04:14:44,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:14:44,184 INFO L495 AbstractCegarLoop]: Abstraction has 26744 states and 32091 transitions. [2023-11-19 04:14:44,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:14:44,185 INFO L276 IsEmpty]: Start isEmpty. Operand 26744 states and 32091 transitions. [2023-11-19 04:14:44,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2023-11-19 04:14:44,212 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:14:44,212 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:14:44,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-19 04:14:44,213 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:14:44,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:14:44,213 INFO L85 PathProgramCache]: Analyzing trace with hash 131618665, now seen corresponding path program 1 times [2023-11-19 04:14:44,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:14:44,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130017853] [2023-11-19 04:14:44,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:14:44,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:14:44,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:14:45,062 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 188 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:14:45,062 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:14:45,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130017853] [2023-11-19 04:14:45,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130017853] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:14:45,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977495630] [2023-11-19 04:14:45,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:14:45,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:14:45,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e37bd54f-306d-4c6f-abb2-eef17c756557/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:14:45,064 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e37bd54f-306d-4c6f-abb2-eef17c756557/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:14:45,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e37bd54f-306d-4c6f-abb2-eef17c756557/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 04:14:45,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:14:45,346 INFO L262 TraceCheckSpWp]: Trace formula consists of 620 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 04:14:45,353 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:14:45,635 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 188 proven. 67 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 04:14:45,636 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:14:45,883 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 188 proven. 67 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 04:14:45,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977495630] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:14:45,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1702517210] [2023-11-19 04:14:45,912 INFO L159 IcfgInterpreter]: Started Sifa with 145 locations of interest [2023-11-19 04:14:45,912 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:14:45,916 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:14:45,922 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:14:45,922 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs