./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/neural-networks/cartpole_54_safe.c-amalgamation.i --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_097984b6-f9cb-48dc-9f2a-61f9e8606f53/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097984b6-f9cb-48dc-9f2a-61f9e8606f53/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_097984b6-f9cb-48dc-9f2a-61f9e8606f53/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097984b6-f9cb-48dc-9f2a-61f9e8606f53/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/neural-networks/cartpole_54_safe.c-amalgamation.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097984b6-f9cb-48dc-9f2a-61f9e8606f53/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_097984b6-f9cb-48dc-9f2a-61f9e8606f53/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 286cac198e69aab71137660b349ddf336734da5ffad22a253119320c0529a5a1 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 04:49:03,714 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 04:49:03,785 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097984b6-f9cb-48dc-9f2a-61f9e8606f53/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 04:49:03,791 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 04:49:03,791 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 04:49:03,819 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 04:49:03,820 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 04:49:03,821 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 04:49:03,821 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 04:49:03,822 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 04:49:03,823 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 04:49:03,823 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 04:49:03,824 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 04:49:03,824 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 04:49:03,825 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 04:49:03,826 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 04:49:03,826 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 04:49:03,827 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 04:49:03,827 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 04:49:03,828 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 04:49:03,828 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 04:49:03,836 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 04:49:03,836 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 04:49:03,837 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 04:49:03,837 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 04:49:03,838 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 04:49:03,838 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 04:49:03,838 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 04:49:03,839 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 04:49:03,839 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 04:49:03,839 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 04:49:03,840 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 04:49:03,840 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 04:49:03,841 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 04:49:03,841 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 04:49:03,841 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 04:49:03,842 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:49:03,842 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 04:49:03,842 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 04:49:03,843 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 04:49:03,843 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 04:49:03,845 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 04:49:03,845 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 04:49:03,845 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 04:49:03,846 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 04:49:03,846 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_097984b6-f9cb-48dc-9f2a-61f9e8606f53/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097984b6-f9cb-48dc-9f2a-61f9e8606f53/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 286cac198e69aab71137660b349ddf336734da5ffad22a253119320c0529a5a1 [2023-11-19 04:49:04,212 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 04:49:04,250 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 04:49:04,253 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 04:49:04,255 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 04:49:04,255 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 04:49:04,258 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097984b6-f9cb-48dc-9f2a-61f9e8606f53/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/neural-networks/cartpole_54_safe.c-amalgamation.i [2023-11-19 04:49:07,577 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 04:49:08,044 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 04:49:08,047 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097984b6-f9cb-48dc-9f2a-61f9e8606f53/sv-benchmarks/c/neural-networks/cartpole_54_safe.c-amalgamation.i [2023-11-19 04:49:08,090 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097984b6-f9cb-48dc-9f2a-61f9e8606f53/bin/utaipan-verify-t7M7D8N6sZ/data/97170fdaa/cbaa76e5f48740bdb6847d89d1683427/FLAGe4ba1a745 [2023-11-19 04:49:08,109 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097984b6-f9cb-48dc-9f2a-61f9e8606f53/bin/utaipan-verify-t7M7D8N6sZ/data/97170fdaa/cbaa76e5f48740bdb6847d89d1683427 [2023-11-19 04:49:08,116 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 04:49:08,118 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 04:49:08,123 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 04:49:08,123 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 04:49:08,129 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 04:49:08,130 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:49:08" (1/1) ... [2023-11-19 04:49:08,131 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e928fc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:49:08, skipping insertion in model container [2023-11-19 04:49:08,131 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:49:08" (1/1) ... [2023-11-19 04:49:08,237 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 04:49:08,494 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-11-19 04:49:09,347 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_097984b6-f9cb-48dc-9f2a-61f9e8606f53/sv-benchmarks/c/neural-networks/cartpole_54_safe.c-amalgamation.i[63706,63719] [2023-11-19 04:49:09,756 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:49:09,966 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 04:49:10,005 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-11-19 04:49:10,047 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_097984b6-f9cb-48dc-9f2a-61f9e8606f53/sv-benchmarks/c/neural-networks/cartpole_54_safe.c-amalgamation.i[63706,63719] [2023-11-19 04:49:10,181 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:49:10,599 WARN L675 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 04:49:10,608 INFO L206 MainTranslator]: Completed translation [2023-11-19 04:49:10,609 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:49:10 WrapperNode [2023-11-19 04:49:10,609 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 04:49:10,610 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 04:49:10,610 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 04:49:10,611 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 04:49:10,619 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:49:10" (1/1) ... [2023-11-19 04:49:10,742 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:49:10" (1/1) ... [2023-11-19 04:49:11,004 INFO L138 Inliner]: procedures = 621, calls = 4747, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 5015 [2023-11-19 04:49:11,005 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 04:49:11,006 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 04:49:11,006 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 04:49:11,006 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 04:49:11,017 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:49:10" (1/1) ... [2023-11-19 04:49:11,018 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:49:10" (1/1) ... [2023-11-19 04:49:11,075 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:49:10" (1/1) ... [2023-11-19 04:49:11,075 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:49:10" (1/1) ... [2023-11-19 04:49:11,198 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:49:10" (1/1) ... [2023-11-19 04:49:11,213 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:49:10" (1/1) ... [2023-11-19 04:49:11,246 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:49:10" (1/1) ... [2023-11-19 04:49:11,265 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:49:10" (1/1) ... [2023-11-19 04:49:11,286 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 04:49:11,287 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 04:49:11,287 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 04:49:11,288 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 04:49:11,289 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:49:10" (1/1) ... [2023-11-19 04:49:11,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:49:11,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097984b6-f9cb-48dc-9f2a-61f9e8606f53/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:49:11,317 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097984b6-f9cb-48dc-9f2a-61f9e8606f53/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 04:49:11,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097984b6-f9cb-48dc-9f2a-61f9e8606f53/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 04:49:11,359 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2023-11-19 04:49:11,359 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 04:49:11,360 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real [2023-11-19 04:49:11,361 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2023-11-19 04:49:11,362 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 04:49:11,362 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 04:49:11,362 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 04:49:11,362 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 04:49:11,363 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 04:49:11,643 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 04:49:11,645 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 04:49:26,491 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 04:49:30,787 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 04:49:30,787 INFO L302 CfgBuilder]: Removed 12 assume(true) statements. [2023-11-19 04:49:30,816 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:49:30 BoogieIcfgContainer [2023-11-19 04:49:30,820 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 04:49:30,824 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 04:49:30,828 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 04:49:30,841 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 04:49:30,842 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:49:08" (1/3) ... [2023-11-19 04:49:30,844 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25960e90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:49:30, skipping insertion in model container [2023-11-19 04:49:30,845 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:49:10" (2/3) ... [2023-11-19 04:49:30,846 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25960e90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:49:30, skipping insertion in model container [2023-11-19 04:49:30,846 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:49:30" (3/3) ... [2023-11-19 04:49:30,852 INFO L112 eAbstractionObserver]: Analyzing ICFG cartpole_54_safe.c-amalgamation.i [2023-11-19 04:49:30,876 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 04:49:30,876 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 04:49:30,969 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 04:49:30,978 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;@2f761474, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 04:49:30,978 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 04:49:30,983 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.875) internal successors, (30), 17 states have internal predecessors, (30), 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 04:49:30,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-19 04:49:30,991 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:49:30,992 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:49:30,993 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:49:30,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:49:31,000 INFO L85 PathProgramCache]: Analyzing trace with hash -873503770, now seen corresponding path program 1 times [2023-11-19 04:49:31,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:49:31,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413568944] [2023-11-19 04:49:31,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:49:31,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:49:31,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:49:33,141 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 04:49:33,141 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:49:33,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413568944] [2023-11-19 04:49:33,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413568944] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:49:33,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:49:33,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 04:49:33,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195107049] [2023-11-19 04:49:33,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:49:33,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:49:33,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:49:33,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:49:33,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:49:33,199 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.875) internal successors, (30), 17 states have internal predecessors, (30), 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 3.0) internal successors, (9), 2 states have internal predecessors, (9), 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 04:49:33,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:49:33,605 INFO L93 Difference]: Finished difference Result 35 states and 59 transitions. [2023-11-19 04:49:33,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:49:33,607 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 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 9 [2023-11-19 04:49:33,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:49:33,615 INFO L225 Difference]: With dead ends: 35 [2023-11-19 04:49:33,616 INFO L226 Difference]: Without dead ends: 17 [2023-11-19 04:49:33,618 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 04:49:33,627 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 04:49:33,638 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 04:49:33,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-11-19 04:49:33,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-11-19 04:49:33,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 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 04:49:33,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 28 transitions. [2023-11-19 04:49:33,676 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 28 transitions. Word has length 9 [2023-11-19 04:49:33,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:49:33,677 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 28 transitions. [2023-11-19 04:49:33,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 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 04:49:33,677 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 28 transitions. [2023-11-19 04:49:33,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-19 04:49:33,678 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:49:33,678 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:49:33,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 04:49:33,679 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:49:33,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:49:33,680 INFO L85 PathProgramCache]: Analyzing trace with hash 894430026, now seen corresponding path program 1 times [2023-11-19 04:49:33,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:49:33,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780207369] [2023-11-19 04:49:33,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:49:33,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:49:34,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:49:35,290 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:49:35,291 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:49:35,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780207369] [2023-11-19 04:49:35,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780207369] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:49:35,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737799151] [2023-11-19 04:49:35,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:49:35,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:49:35,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097984b6-f9cb-48dc-9f2a-61f9e8606f53/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:49:35,304 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097984b6-f9cb-48dc-9f2a-61f9e8606f53/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:49:35,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097984b6-f9cb-48dc-9f2a-61f9e8606f53/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 04:49:37,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:49:37,053 INFO L262 TraceCheckSpWp]: Trace formula consists of 5392 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 04:49:37,070 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:49:37,098 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:49:37,099 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:49:37,116 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 04:49:37,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737799151] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 04:49:37,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-19 04:49:37,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 4] total 6 [2023-11-19 04:49:37,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026146192] [2023-11-19 04:49:37,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:49:37,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:49:37,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:49:37,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:49:37,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 04:49:37,121 INFO L87 Difference]: Start difference. First operand 17 states and 28 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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 04:49:37,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:49:37,565 INFO L93 Difference]: Finished difference Result 28 states and 46 transitions. [2023-11-19 04:49:37,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:49:37,566 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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 10 [2023-11-19 04:49:37,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:49:37,567 INFO L225 Difference]: With dead ends: 28 [2023-11-19 04:49:37,567 INFO L226 Difference]: Without dead ends: 18 [2023-11-19 04:49:37,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 04:49:37,569 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 04:49:37,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 04:49:37,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-11-19 04:49:37,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2023-11-19 04:49:37,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 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 04:49:37,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 29 transitions. [2023-11-19 04:49:37,577 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 29 transitions. Word has length 10 [2023-11-19 04:49:37,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:49:37,578 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 29 transitions. [2023-11-19 04:49:37,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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 04:49:37,578 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 29 transitions. [2023-11-19 04:49:37,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-19 04:49:37,579 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:49:37,580 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:49:37,621 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097984b6-f9cb-48dc-9f2a-61f9e8606f53/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 04:49:37,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097984b6-f9cb-48dc-9f2a-61f9e8606f53/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:49:37,796 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:49:37,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:49:37,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1291780743, now seen corresponding path program 1 times [2023-11-19 04:49:37,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:49:37,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556093564] [2023-11-19 04:49:37,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:49:37,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:49:38,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:49:39,287 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 04:49:39,288 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:49:39,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556093564] [2023-11-19 04:49:39,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556093564] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:49:39,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508764418] [2023-11-19 04:49:39,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:49:39,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:49:39,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097984b6-f9cb-48dc-9f2a-61f9e8606f53/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:49:39,301 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097984b6-f9cb-48dc-9f2a-61f9e8606f53/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:49:39,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097984b6-f9cb-48dc-9f2a-61f9e8606f53/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 04:49:40,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:49:40,861 INFO L262 TraceCheckSpWp]: Trace formula consists of 5404 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 04:49:40,869 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:49:40,883 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 04:49:40,883 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:49:40,899 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 04:49:40,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508764418] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 04:49:40,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-19 04:49:40,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 4] total 6 [2023-11-19 04:49:40,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019076399] [2023-11-19 04:49:40,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:49:40,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:49:40,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:49:40,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:49:40,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 04:49:40,903 INFO L87 Difference]: Start difference. First operand 18 states and 29 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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 04:49:41,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:49:41,278 INFO L93 Difference]: Finished difference Result 25 states and 39 transitions. [2023-11-19 04:49:41,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:49:41,279 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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 11 [2023-11-19 04:49:41,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:49:41,280 INFO L225 Difference]: With dead ends: 25 [2023-11-19 04:49:41,280 INFO L226 Difference]: Without dead ends: 19 [2023-11-19 04:49:41,280 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 04:49:41,281 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 04:49:41,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 04:49:41,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-11-19 04:49:41,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-11-19 04:49:41,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 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 04:49:41,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 30 transitions. [2023-11-19 04:49:41,289 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 30 transitions. Word has length 11 [2023-11-19 04:49:41,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:49:41,289 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 30 transitions. [2023-11-19 04:49:41,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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 04:49:41,289 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 30 transitions. [2023-11-19 04:49:41,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-19 04:49:41,290 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:49:41,290 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:49:41,327 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097984b6-f9cb-48dc-9f2a-61f9e8606f53/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 04:49:41,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097984b6-f9cb-48dc-9f2a-61f9e8606f53/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:49:41,491 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:49:41,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:49:41,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1400233037, now seen corresponding path program 1 times [2023-11-19 04:49:41,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:49:41,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330559662] [2023-11-19 04:49:41,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:49:41,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:49:41,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:49:42,784 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 04:49:42,784 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:49:42,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330559662] [2023-11-19 04:49:42,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330559662] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:49:42,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552059048] [2023-11-19 04:49:42,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:49:42,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:49:42,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097984b6-f9cb-48dc-9f2a-61f9e8606f53/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:49:42,792 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097984b6-f9cb-48dc-9f2a-61f9e8606f53/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:49:42,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097984b6-f9cb-48dc-9f2a-61f9e8606f53/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 04:49:44,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:49:44,342 INFO L262 TraceCheckSpWp]: Trace formula consists of 5416 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-19 04:49:44,349 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:49:44,365 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 04:49:44,365 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:49:44,395 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 04:49:44,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552059048] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 04:49:44,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-19 04:49:44,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 6 [2023-11-19 04:49:44,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306076026] [2023-11-19 04:49:44,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:49:44,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:49:44,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:49:44,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:49:44,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 04:49:44,399 INFO L87 Difference]: Start difference. First operand 19 states and 30 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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 04:49:44,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:49:44,746 INFO L93 Difference]: Finished difference Result 33 states and 52 transitions. [2023-11-19 04:49:44,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:49:44,747 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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 12 [2023-11-19 04:49:44,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:49:44,747 INFO L225 Difference]: With dead ends: 33 [2023-11-19 04:49:44,747 INFO L226 Difference]: Without dead ends: 20 [2023-11-19 04:49:44,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 04:49:44,749 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 4 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 04:49:44,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 13 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 04:49:44,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-11-19 04:49:44,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-11-19 04:49:44,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 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 04:49:44,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 31 transitions. [2023-11-19 04:49:44,755 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 31 transitions. Word has length 12 [2023-11-19 04:49:44,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:49:44,755 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 31 transitions. [2023-11-19 04:49:44,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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 04:49:44,755 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 31 transitions. [2023-11-19 04:49:44,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-19 04:49:44,756 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:49:44,757 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:49:44,788 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097984b6-f9cb-48dc-9f2a-61f9e8606f53/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 04:49:44,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097984b6-f9cb-48dc-9f2a-61f9e8606f53/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:49:44,958 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:49:44,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:49:44,958 INFO L85 PathProgramCache]: Analyzing trace with hash -272759460, now seen corresponding path program 1 times [2023-11-19 04:49:44,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:49:44,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066364525] [2023-11-19 04:49:44,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:49:44,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:49:45,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:49:46,181 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 04:49:46,181 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:49:46,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066364525] [2023-11-19 04:49:46,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066364525] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:49:46,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044685634] [2023-11-19 04:49:46,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:49:46,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:49:46,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097984b6-f9cb-48dc-9f2a-61f9e8606f53/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:49:46,184 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097984b6-f9cb-48dc-9f2a-61f9e8606f53/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:49:46,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097984b6-f9cb-48dc-9f2a-61f9e8606f53/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 04:49:47,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:49:47,704 INFO L262 TraceCheckSpWp]: Trace formula consists of 5422 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-19 04:49:47,710 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:49:47,739 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 04:49:47,743 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:49:47,759 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 04:49:47,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044685634] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 04:49:47,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-19 04:49:47,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 4] total 7 [2023-11-19 04:49:47,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833414151] [2023-11-19 04:49:47,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:49:47,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:49:47,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:49:47,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:49:47,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-19 04:49:47,770 INFO L87 Difference]: Start difference. First operand 20 states and 31 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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 04:49:48,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:49:48,120 INFO L93 Difference]: Finished difference Result 29 states and 44 transitions. [2023-11-19 04:49:48,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:49:48,121 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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 14 [2023-11-19 04:49:48,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:49:48,121 INFO L225 Difference]: With dead ends: 29 [2023-11-19 04:49:48,121 INFO L226 Difference]: Without dead ends: 21 [2023-11-19 04:49:48,122 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-19 04:49:48,123 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 4 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 04:49:48,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 13 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 04:49:48,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-11-19 04:49:48,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-11-19 04:49:48,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 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 04:49:48,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 32 transitions. [2023-11-19 04:49:48,128 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 32 transitions. Word has length 14 [2023-11-19 04:49:48,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:49:48,128 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 32 transitions. [2023-11-19 04:49:48,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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 04:49:48,129 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 32 transitions. [2023-11-19 04:49:48,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-19 04:49:48,129 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:49:48,129 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:49:48,166 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097984b6-f9cb-48dc-9f2a-61f9e8606f53/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-19 04:49:48,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097984b6-f9cb-48dc-9f2a-61f9e8606f53/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:49:48,344 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:49:48,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:49:48,345 INFO L85 PathProgramCache]: Analyzing trace with hash -2063430505, now seen corresponding path program 1 times [2023-11-19 04:49:48,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:49:48,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892502950] [2023-11-19 04:49:48,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:49:48,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:49:48,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:49:49,471 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 04:49:49,471 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:49:49,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892502950] [2023-11-19 04:49:49,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892502950] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:49:49,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942499313] [2023-11-19 04:49:49,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:49:49,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:49:49,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097984b6-f9cb-48dc-9f2a-61f9e8606f53/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:49:49,477 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097984b6-f9cb-48dc-9f2a-61f9e8606f53/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:49:49,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097984b6-f9cb-48dc-9f2a-61f9e8606f53/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 04:49:50,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:49:50,922 INFO L262 TraceCheckSpWp]: Trace formula consists of 5428 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-19 04:49:50,928 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:49:50,968 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 04:49:50,968 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:49:50,983 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-19 04:49:50,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942499313] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 04:49:50,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-19 04:49:50,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 4] total 7 [2023-11-19 04:49:50,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238618817] [2023-11-19 04:49:50,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:49:50,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:49:50,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:49:50,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:49:50,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-19 04:49:50,989 INFO L87 Difference]: Start difference. First operand 21 states and 32 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 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 04:49:51,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:49:51,363 INFO L93 Difference]: Finished difference Result 25 states and 36 transitions. [2023-11-19 04:49:51,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:49:51,364 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 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 16 [2023-11-19 04:49:51,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:49:51,365 INFO L225 Difference]: With dead ends: 25 [2023-11-19 04:49:51,365 INFO L226 Difference]: Without dead ends: 22 [2023-11-19 04:49:51,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-19 04:49:51,366 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 4 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 04:49:51,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 13 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 04:49:51,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-11-19 04:49:51,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-11-19 04:49:51,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 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 04:49:51,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 33 transitions. [2023-11-19 04:49:51,378 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 33 transitions. Word has length 16 [2023-11-19 04:49:51,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:49:51,378 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 33 transitions. [2023-11-19 04:49:51,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 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 04:49:51,379 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 33 transitions. [2023-11-19 04:49:51,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-19 04:49:51,380 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:49:51,380 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:49:51,408 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097984b6-f9cb-48dc-9f2a-61f9e8606f53/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 04:49:51,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_097984b6-f9cb-48dc-9f2a-61f9e8606f53/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-19 04:49:51,591 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:49:51,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:49:51,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1218805573, now seen corresponding path program 1 times [2023-11-19 04:49:51,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:49:51,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347332407] [2023-11-19 04:49:51,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:49:51,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms