./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/token_ring.07.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b 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_b5fba777-c5ba-413b-964b-d1fd1f1d732d/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5fba777-c5ba-413b-964b-d1fd1f1d732d/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5fba777-c5ba-413b-964b-d1fd1f1d732d/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5fba777-c5ba-413b-964b-d1fd1f1d732d/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/token_ring.07.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5fba777-c5ba-413b-964b-d1fd1f1d732d/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5fba777-c5ba-413b-964b-d1fd1f1d732d/bin/utaipan-I9t0OCRTmS --witnessprinter.witness.filename witness.graphml --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 32b030e5f1b46150870f8dd8e24821389f0ffe4175e43053767dc9109bffcf9b --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-19 08:03:07,968 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 08:03:07,972 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 08:03:08,019 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 08:03:08,019 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 08:03:08,024 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 08:03:08,026 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 08:03:08,028 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 08:03:08,030 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 08:03:08,031 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 08:03:08,033 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 08:03:08,034 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 08:03:08,035 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 08:03:08,044 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 08:03:08,046 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 08:03:08,049 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 08:03:08,051 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 08:03:08,055 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 08:03:08,058 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 08:03:08,066 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 08:03:08,070 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 08:03:08,072 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 08:03:08,077 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 08:03:08,078 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 08:03:08,081 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 08:03:08,082 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 08:03:08,082 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 08:03:08,084 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 08:03:08,084 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 08:03:08,085 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 08:03:08,086 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 08:03:08,087 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 08:03:08,093 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 08:03:08,095 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 08:03:08,097 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 08:03:08,098 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 08:03:08,099 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 08:03:08,099 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 08:03:08,099 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 08:03:08,100 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 08:03:08,101 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 08:03:08,102 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5fba777-c5ba-413b-964b-d1fd1f1d732d/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 08:03:08,134 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 08:03:08,135 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 08:03:08,135 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 08:03:08,136 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 08:03:08,136 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 08:03:08,137 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 08:03:08,137 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 08:03:08,137 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 08:03:08,137 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 08:03:08,138 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 08:03:08,138 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 08:03:08,138 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 08:03:08,139 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 08:03:08,139 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 08:03:08,139 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 08:03:08,139 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 08:03:08,140 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 08:03:08,140 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 08:03:08,141 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 08:03:08,141 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 08:03:08,141 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 08:03:08,142 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 08:03:08,142 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 08:03:08,142 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 08:03:08,142 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 08:03:08,143 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 08:03:08,143 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 08:03:08,143 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 08:03:08,146 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 08:03:08,146 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 08:03:08,146 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 08:03:08,147 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 08:03:08,147 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:03:08,147 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 08:03:08,148 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 08:03:08,148 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 08:03:08,149 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 08:03:08,150 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 08:03:08,150 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 08:03:08,150 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 08:03:08,150 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 08:03:08,151 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_b5fba777-c5ba-413b-964b-d1fd1f1d732d/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5fba777-c5ba-413b-964b-d1fd1f1d732d/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 32b030e5f1b46150870f8dd8e24821389f0ffe4175e43053767dc9109bffcf9b [2022-11-19 08:03:08,484 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 08:03:08,512 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 08:03:08,515 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 08:03:08,517 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 08:03:08,518 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 08:03:08,520 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5fba777-c5ba-413b-964b-d1fd1f1d732d/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/systemc/token_ring.07.cil-2.c [2022-11-19 08:03:08,599 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5fba777-c5ba-413b-964b-d1fd1f1d732d/bin/utaipan-I9t0OCRTmS/data/250fedb7f/810f86cda8f14772994b92cafa1199e5/FLAGcec4e255d [2022-11-19 08:03:09,149 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 08:03:09,150 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5fba777-c5ba-413b-964b-d1fd1f1d732d/sv-benchmarks/c/systemc/token_ring.07.cil-2.c [2022-11-19 08:03:09,179 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5fba777-c5ba-413b-964b-d1fd1f1d732d/bin/utaipan-I9t0OCRTmS/data/250fedb7f/810f86cda8f14772994b92cafa1199e5/FLAGcec4e255d [2022-11-19 08:03:09,484 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5fba777-c5ba-413b-964b-d1fd1f1d732d/bin/utaipan-I9t0OCRTmS/data/250fedb7f/810f86cda8f14772994b92cafa1199e5 [2022-11-19 08:03:09,487 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 08:03:09,489 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 08:03:09,491 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 08:03:09,491 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 08:03:09,497 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 08:03:09,498 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:03:09" (1/1) ... [2022-11-19 08:03:09,500 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@332bf2d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:09, skipping insertion in model container [2022-11-19 08:03:09,501 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:03:09" (1/1) ... [2022-11-19 08:03:09,510 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 08:03:09,573 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 08:03:09,782 WARN L234 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_b5fba777-c5ba-413b-964b-d1fd1f1d732d/sv-benchmarks/c/systemc/token_ring.07.cil-2.c[671,684] [2022-11-19 08:03:09,906 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:03:09,918 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 08:03:09,937 WARN L234 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_b5fba777-c5ba-413b-964b-d1fd1f1d732d/sv-benchmarks/c/systemc/token_ring.07.cil-2.c[671,684] [2022-11-19 08:03:09,997 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:03:10,017 INFO L208 MainTranslator]: Completed translation [2022-11-19 08:03:10,018 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:10 WrapperNode [2022-11-19 08:03:10,018 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 08:03:10,024 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 08:03:10,025 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 08:03:10,025 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 08:03:10,044 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:10" (1/1) ... [2022-11-19 08:03:10,075 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:10" (1/1) ... [2022-11-19 08:03:10,122 INFO L138 Inliner]: procedures = 42, calls = 53, calls flagged for inlining = 25, calls inlined = 25, statements flattened = 568 [2022-11-19 08:03:10,129 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 08:03:10,130 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 08:03:10,130 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 08:03:10,130 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 08:03:10,140 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:10" (1/1) ... [2022-11-19 08:03:10,140 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:10" (1/1) ... [2022-11-19 08:03:10,150 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:10" (1/1) ... [2022-11-19 08:03:10,151 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:10" (1/1) ... [2022-11-19 08:03:10,166 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:10" (1/1) ... [2022-11-19 08:03:10,193 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:10" (1/1) ... [2022-11-19 08:03:10,196 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:10" (1/1) ... [2022-11-19 08:03:10,198 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:10" (1/1) ... [2022-11-19 08:03:10,203 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 08:03:10,204 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 08:03:10,204 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 08:03:10,204 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 08:03:10,214 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:10" (1/1) ... [2022-11-19 08:03:10,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:03:10,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5fba777-c5ba-413b-964b-d1fd1f1d732d/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:03:10,253 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5fba777-c5ba-413b-964b-d1fd1f1d732d/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 08:03:10,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5fba777-c5ba-413b-964b-d1fd1f1d732d/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 08:03:10,311 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 08:03:10,311 INFO L130 BoogieDeclarations]: Found specification of procedure error [2022-11-19 08:03:10,311 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2022-11-19 08:03:10,312 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-11-19 08:03:10,312 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-11-19 08:03:10,312 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-11-19 08:03:10,312 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-11-19 08:03:10,313 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-19 08:03:10,313 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-19 08:03:10,313 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-11-19 08:03:10,313 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-11-19 08:03:10,314 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-11-19 08:03:10,314 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-11-19 08:03:10,314 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 08:03:10,314 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-11-19 08:03:10,315 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-11-19 08:03:10,315 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 08:03:10,315 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 08:03:10,434 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 08:03:10,436 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 08:03:11,295 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 08:03:11,822 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 08:03:11,822 INFO L300 CfgBuilder]: Removed 10 assume(true) statements. [2022-11-19 08:03:11,827 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:03:11 BoogieIcfgContainer [2022-11-19 08:03:11,828 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 08:03:11,831 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 08:03:11,831 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 08:03:11,835 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 08:03:11,835 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:03:09" (1/3) ... [2022-11-19 08:03:11,836 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ef6017f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:03:11, skipping insertion in model container [2022-11-19 08:03:11,837 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:10" (2/3) ... [2022-11-19 08:03:11,837 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ef6017f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:03:11, skipping insertion in model container [2022-11-19 08:03:11,837 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:03:11" (3/3) ... [2022-11-19 08:03:11,841 INFO L112 eAbstractionObserver]: Analyzing ICFG token_ring.07.cil-2.c [2022-11-19 08:03:11,864 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 08:03:11,865 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 08:03:11,961 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 08:03:11,978 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=LoopsAndPotentialCycles, 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;@1bb6ecd2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 08:03:11,979 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 08:03:11,989 INFO L276 IsEmpty]: Start isEmpty. Operand has 139 states, 107 states have (on average 1.5514018691588785) internal successors, (166), 111 states have internal predecessors, (166), 23 states have call successors, (23), 7 states have call predecessors, (23), 7 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2022-11-19 08:03:12,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-19 08:03:12,002 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:03:12,002 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] [2022-11-19 08:03:12,003 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:03:12,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:03:12,009 INFO L85 PathProgramCache]: Analyzing trace with hash 2073170108, now seen corresponding path program 1 times [2022-11-19 08:03:12,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:03:12,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347310602] [2022-11-19 08:03:12,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:03:12,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:03:12,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:03:12,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:03:12,573 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:03:12,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347310602] [2022-11-19 08:03:12,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347310602] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:03:12,574 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:03:12,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:03:12,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543779984] [2022-11-19 08:03:12,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:03:12,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:03:12,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:03:12,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:03:12,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:03:12,628 INFO L87 Difference]: Start difference. First operand has 139 states, 107 states have (on average 1.5514018691588785) internal successors, (166), 111 states have internal predecessors, (166), 23 states have call successors, (23), 7 states have call predecessors, (23), 7 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-19 08:03:13,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:03:13,244 INFO L93 Difference]: Finished difference Result 394 states and 613 transitions. [2022-11-19 08:03:13,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:03:13,247 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 52 [2022-11-19 08:03:13,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:03:13,260 INFO L225 Difference]: With dead ends: 394 [2022-11-19 08:03:13,261 INFO L226 Difference]: Without dead ends: 256 [2022-11-19 08:03:13,266 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:03:13,270 INFO L413 NwaCegarLoop]: 311 mSDtfsCounter, 355 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 542 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:03:13,271 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [355 Valid, 542 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 08:03:13,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2022-11-19 08:03:13,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 255. [2022-11-19 08:03:13,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 202 states have (on average 1.495049504950495) internal successors, (302), 205 states have internal predecessors, (302), 40 states have call successors, (40), 13 states have call predecessors, (40), 12 states have return successors, (38), 37 states have call predecessors, (38), 38 states have call successors, (38) [2022-11-19 08:03:13,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 380 transitions. [2022-11-19 08:03:13,350 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 380 transitions. Word has length 52 [2022-11-19 08:03:13,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:03:13,351 INFO L495 AbstractCegarLoop]: Abstraction has 255 states and 380 transitions. [2022-11-19 08:03:13,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-19 08:03:13,352 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 380 transitions. [2022-11-19 08:03:13,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-19 08:03:13,357 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:03:13,358 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:03:13,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 08:03:13,358 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:03:13,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:03:13,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1305301947, now seen corresponding path program 1 times [2022-11-19 08:03:13,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:03:13,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870739113] [2022-11-19 08:03:13,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:03:13,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:03:13,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:03:13,881 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-19 08:03:13,881 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:03:13,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870739113] [2022-11-19 08:03:13,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870739113] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:03:13,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050039109] [2022-11-19 08:03:13,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:03:13,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:03:13,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5fba777-c5ba-413b-964b-d1fd1f1d732d/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:03:13,887 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5fba777-c5ba-413b-964b-d1fd1f1d732d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:03:13,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5fba777-c5ba-413b-964b-d1fd1f1d732d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 08:03:14,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:03:14,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 661 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 08:03:14,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:03:14,212 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-19 08:03:14,213 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:03:14,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050039109] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:03:14,214 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:03:14,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-19 08:03:14,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754094016] [2022-11-19 08:03:14,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:03:14,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:03:14,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:03:14,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:03:14,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:03:14,218 INFO L87 Difference]: Start difference. First operand 255 states and 380 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 2 states have internal predecessors, (64), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 08:03:14,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:03:14,395 INFO L93 Difference]: Finished difference Result 748 states and 1133 transitions. [2022-11-19 08:03:14,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:03:14,396 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 2 states have internal predecessors, (64), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 101 [2022-11-19 08:03:14,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:03:14,403 INFO L225 Difference]: With dead ends: 748 [2022-11-19 08:03:14,403 INFO L226 Difference]: Without dead ends: 498 [2022-11-19 08:03:14,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:03:14,408 INFO L413 NwaCegarLoop]: 217 mSDtfsCounter, 177 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:03:14,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 375 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:03:14,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2022-11-19 08:03:14,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 492. [2022-11-19 08:03:14,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 492 states, 395 states have (on average 1.491139240506329) internal successors, (589), 399 states have internal predecessors, (589), 72 states have call successors, (72), 25 states have call predecessors, (72), 24 states have return successors, (70), 68 states have call predecessors, (70), 70 states have call successors, (70) [2022-11-19 08:03:14,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 731 transitions. [2022-11-19 08:03:14,471 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 731 transitions. Word has length 101 [2022-11-19 08:03:14,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:03:14,472 INFO L495 AbstractCegarLoop]: Abstraction has 492 states and 731 transitions. [2022-11-19 08:03:14,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 2 states have internal predecessors, (64), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 08:03:14,473 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 731 transitions. [2022-11-19 08:03:14,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-19 08:03:14,489 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:03:14,489 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:03:14,499 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5fba777-c5ba-413b-964b-d1fd1f1d732d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-19 08:03:14,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5fba777-c5ba-413b-964b-d1fd1f1d732d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:03:14,690 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:03:14,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:03:14,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1404827843, now seen corresponding path program 1 times [2022-11-19 08:03:14,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:03:14,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578908539] [2022-11-19 08:03:14,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:03:14,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:03:14,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:03:14,910 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-19 08:03:14,910 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:03:14,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578908539] [2022-11-19 08:03:14,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578908539] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:03:14,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164015279] [2022-11-19 08:03:14,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:03:14,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:03:14,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5fba777-c5ba-413b-964b-d1fd1f1d732d/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:03:14,913 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5fba777-c5ba-413b-964b-d1fd1f1d732d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:03:14,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5fba777-c5ba-413b-964b-d1fd1f1d732d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 08:03:15,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:03:15,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 655 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 08:03:15,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:03:15,263 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 08:03:15,263 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:03:15,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164015279] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:03:15,264 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:03:15,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-19 08:03:15,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480374321] [2022-11-19 08:03:15,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:03:15,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:03:15,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:03:15,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:03:15,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:03:15,267 INFO L87 Difference]: Start difference. First operand 492 states and 731 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 2 states have internal predecessors, (76), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 08:03:15,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:03:15,464 INFO L93 Difference]: Finished difference Result 1453 states and 2194 transitions. [2022-11-19 08:03:15,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:03:15,465 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 2 states have internal predecessors, (76), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 101 [2022-11-19 08:03:15,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:03:15,475 INFO L225 Difference]: With dead ends: 1453 [2022-11-19 08:03:15,476 INFO L226 Difference]: Without dead ends: 966 [2022-11-19 08:03:15,478 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:03:15,482 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 165 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:03:15,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 341 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:03:15,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 966 states. [2022-11-19 08:03:15,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 966 to 958. [2022-11-19 08:03:15,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 958 states, 775 states have (on average 1.4851612903225806) internal successors, (1151), 781 states have internal predecessors, (1151), 134 states have call successors, (134), 49 states have call predecessors, (134), 48 states have return successors, (132), 128 states have call predecessors, (132), 132 states have call successors, (132) [2022-11-19 08:03:15,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 958 states to 958 states and 1417 transitions. [2022-11-19 08:03:15,599 INFO L78 Accepts]: Start accepts. Automaton has 958 states and 1417 transitions. Word has length 101 [2022-11-19 08:03:15,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:03:15,600 INFO L495 AbstractCegarLoop]: Abstraction has 958 states and 1417 transitions. [2022-11-19 08:03:15,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 2 states have internal predecessors, (76), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 08:03:15,601 INFO L276 IsEmpty]: Start isEmpty. Operand 958 states and 1417 transitions. [2022-11-19 08:03:15,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-19 08:03:15,606 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:03:15,606 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:03:15,619 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5fba777-c5ba-413b-964b-d1fd1f1d732d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 08:03:15,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5fba777-c5ba-413b-964b-d1fd1f1d732d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:03:15,814 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:03:15,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:03:15,815 INFO L85 PathProgramCache]: Analyzing trace with hash 2003145281, now seen corresponding path program 1 times [2022-11-19 08:03:15,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:03:15,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866115460] [2022-11-19 08:03:15,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:03:15,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:03:15,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:03:16,021 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-19 08:03:16,022 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:03:16,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866115460] [2022-11-19 08:03:16,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866115460] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:03:16,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109579548] [2022-11-19 08:03:16,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:03:16,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:03:16,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5fba777-c5ba-413b-964b-d1fd1f1d732d/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:03:16,029 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5fba777-c5ba-413b-964b-d1fd1f1d732d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:03:16,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5fba777-c5ba-413b-964b-d1fd1f1d732d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 08:03:16,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:03:16,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 649 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 08:03:16,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:03:16,337 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-19 08:03:16,337 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:03:16,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109579548] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:03:16,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:03:16,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-19 08:03:16,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467584326] [2022-11-19 08:03:16,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:03:16,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:03:16,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:03:16,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:03:16,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:03:16,340 INFO L87 Difference]: Start difference. First operand 958 states and 1417 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 08:03:16,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:03:16,622 INFO L93 Difference]: Finished difference Result 2839 states and 4266 transitions. [2022-11-19 08:03:16,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:03:16,626 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 101 [2022-11-19 08:03:16,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:03:16,637 INFO L225 Difference]: With dead ends: 2839 [2022-11-19 08:03:16,638 INFO L226 Difference]: Without dead ends: 1886 [2022-11-19 08:03:16,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:03:16,643 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 180 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:03:16,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 341 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:03:16,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1886 states. [2022-11-19 08:03:16,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1886 to 1874. [2022-11-19 08:03:16,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1874 states, 1523 states have (on average 1.4780039395929088) internal successors, (2251), 1533 states have internal predecessors, (2251), 254 states have call successors, (254), 97 states have call predecessors, (254), 96 states have return successors, (252), 244 states have call predecessors, (252), 252 states have call successors, (252) [2022-11-19 08:03:16,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1874 states to 1874 states and 2757 transitions. [2022-11-19 08:03:16,781 INFO L78 Accepts]: Start accepts. Automaton has 1874 states and 2757 transitions. Word has length 101 [2022-11-19 08:03:16,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:03:16,782 INFO L495 AbstractCegarLoop]: Abstraction has 1874 states and 2757 transitions. [2022-11-19 08:03:16,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 08:03:16,782 INFO L276 IsEmpty]: Start isEmpty. Operand 1874 states and 2757 transitions. [2022-11-19 08:03:16,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-19 08:03:16,788 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:03:16,788 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:03:16,802 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5fba777-c5ba-413b-964b-d1fd1f1d732d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 08:03:16,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5fba777-c5ba-413b-964b-d1fd1f1d732d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-11-19 08:03:16,997 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:03:16,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:03:16,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1610478333, now seen corresponding path program 1 times [2022-11-19 08:03:16,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:03:16,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837199888] [2022-11-19 08:03:16,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:03:16,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:03:17,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:03:17,134 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-19 08:03:17,135 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:03:17,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837199888] [2022-11-19 08:03:17,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837199888] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:03:17,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158549911] [2022-11-19 08:03:17,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:03:17,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:03:17,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5fba777-c5ba-413b-964b-d1fd1f1d732d/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:03:17,138 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5fba777-c5ba-413b-964b-d1fd1f1d732d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:03:17,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5fba777-c5ba-413b-964b-d1fd1f1d732d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 08:03:17,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:03:17,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 643 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 08:03:17,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:03:17,449 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-19 08:03:17,449 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:03:17,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158549911] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:03:17,450 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:03:17,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-19 08:03:17,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161138390] [2022-11-19 08:03:17,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:03:17,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:03:17,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:03:17,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:03:17,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:03:17,454 INFO L87 Difference]: Start difference. First operand 1874 states and 2757 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 2 states have internal predecessors, (70), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 08:03:17,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:03:17,843 INFO L93 Difference]: Finished difference Result 5563 states and 8310 transitions. [2022-11-19 08:03:17,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:03:17,844 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 2 states have internal predecessors, (70), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 101 [2022-11-19 08:03:17,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:03:17,869 INFO L225 Difference]: With dead ends: 5563 [2022-11-19 08:03:17,869 INFO L226 Difference]: Without dead ends: 3694 [2022-11-19 08:03:17,881 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:03:17,882 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 171 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:03:17,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 341 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:03:17,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3694 states. [2022-11-19 08:03:18,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3694 to 3674. [2022-11-19 08:03:18,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3674 states, 2995 states have (on average 1.4701168614357263) internal successors, (4403), 3013 states have internal predecessors, (4403), 486 states have call successors, (486), 193 states have call predecessors, (486), 192 states have return successors, (484), 468 states have call predecessors, (484), 484 states have call successors, (484) [2022-11-19 08:03:18,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3674 states to 3674 states and 5373 transitions. [2022-11-19 08:03:18,164 INFO L78 Accepts]: Start accepts. Automaton has 3674 states and 5373 transitions. Word has length 101 [2022-11-19 08:03:18,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:03:18,165 INFO L495 AbstractCegarLoop]: Abstraction has 3674 states and 5373 transitions. [2022-11-19 08:03:18,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 2 states have internal predecessors, (70), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 08:03:18,166 INFO L276 IsEmpty]: Start isEmpty. Operand 3674 states and 5373 transitions. [2022-11-19 08:03:18,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-19 08:03:18,173 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:03:18,173 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:03:18,184 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5fba777-c5ba-413b-964b-d1fd1f1d732d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 08:03:18,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5fba777-c5ba-413b-964b-d1fd1f1d732d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:03:18,381 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:03:18,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:03:18,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1134956545, now seen corresponding path program 1 times [2022-11-19 08:03:18,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:03:18,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431615398] [2022-11-19 08:03:18,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:03:18,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:03:18,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:03:18,514 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-19 08:03:18,514 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:03:18,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431615398] [2022-11-19 08:03:18,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431615398] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:03:18,518 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:03:18,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:03:18,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131390467] [2022-11-19 08:03:18,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:03:18,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:03:18,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:03:18,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:03:18,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:03:18,520 INFO L87 Difference]: Start difference. First operand 3674 states and 5373 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-19 08:03:18,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:03:18,876 INFO L93 Difference]: Finished difference Result 6526 states and 9712 transitions. [2022-11-19 08:03:18,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:03:18,877 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 101 [2022-11-19 08:03:18,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:03:18,910 INFO L225 Difference]: With dead ends: 6526 [2022-11-19 08:03:18,910 INFO L226 Difference]: Without dead ends: 4634 [2022-11-19 08:03:18,918 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 [2022-11-19 08:03:18,920 INFO L413 NwaCegarLoop]: 254 mSDtfsCounter, 83 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:03:18,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 429 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:03:18,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4634 states. [2022-11-19 08:03:19,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4634 to 4314. [2022-11-19 08:03:19,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4314 states, 3603 states have (on average 1.510685539827921) internal successors, (5443), 3621 states have internal predecessors, (5443), 502 states have call successors, (502), 209 states have call predecessors, (502), 208 states have return successors, (500), 484 states have call predecessors, (500), 500 states have call successors, (500) [2022-11-19 08:03:19,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4314 states to 4314 states and 6445 transitions. [2022-11-19 08:03:19,247 INFO L78 Accepts]: Start accepts. Automaton has 4314 states and 6445 transitions. Word has length 101 [2022-11-19 08:03:19,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:03:19,248 INFO L495 AbstractCegarLoop]: Abstraction has 4314 states and 6445 transitions. [2022-11-19 08:03:19,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-19 08:03:19,249 INFO L276 IsEmpty]: Start isEmpty. Operand 4314 states and 6445 transitions. [2022-11-19 08:03:19,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-19 08:03:19,263 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:03:19,263 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, 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] [2022-11-19 08:03:19,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-19 08:03:19,264 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:03:19,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:03:19,265 INFO L85 PathProgramCache]: Analyzing trace with hash -501569900, now seen corresponding path program 1 times [2022-11-19 08:03:19,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:03:19,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316868896] [2022-11-19 08:03:19,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:03:19,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:03:19,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:03:19,379 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-19 08:03:19,380 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:03:19,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316868896] [2022-11-19 08:03:19,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316868896] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:03:19,380 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:03:19,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:03:19,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64307135] [2022-11-19 08:03:19,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:03:19,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:03:19,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:03:19,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:03:19,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:03:19,383 INFO L87 Difference]: Start difference. First operand 4314 states and 6445 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-19 08:03:19,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:03:19,968 INFO L93 Difference]: Finished difference Result 12787 states and 19318 transitions. [2022-11-19 08:03:19,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:03:19,969 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 136 [2022-11-19 08:03:19,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:03:20,026 INFO L225 Difference]: With dead ends: 12787 [2022-11-19 08:03:20,026 INFO L226 Difference]: Without dead ends: 8478 [2022-11-19 08:03:20,043 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 [2022-11-19 08:03:20,044 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 169 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:03:20,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 343 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:03:20,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8478 states. [2022-11-19 08:03:20,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8478 to 8426. [2022-11-19 08:03:20,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8426 states, 7043 states have (on average 1.499787022575607) internal successors, (10563), 7077 states have internal predecessors, (10563), 966 states have call successors, (966), 417 states have call predecessors, (966), 416 states have return successors, (964), 932 states have call predecessors, (964), 964 states have call successors, (964) [2022-11-19 08:03:20,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8426 states to 8426 states and 12493 transitions. [2022-11-19 08:03:20,668 INFO L78 Accepts]: Start accepts. Automaton has 8426 states and 12493 transitions. Word has length 136 [2022-11-19 08:03:20,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:03:20,669 INFO L495 AbstractCegarLoop]: Abstraction has 8426 states and 12493 transitions. [2022-11-19 08:03:20,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-19 08:03:20,669 INFO L276 IsEmpty]: Start isEmpty. Operand 8426 states and 12493 transitions. [2022-11-19 08:03:20,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-19 08:03:20,702 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:03:20,702 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, 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] [2022-11-19 08:03:20,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-19 08:03:20,702 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:03:20,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:03:20,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1717104385, now seen corresponding path program 1 times [2022-11-19 08:03:20,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:03:20,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279677720] [2022-11-19 08:03:20,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:03:20,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:03:20,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:03:20,847 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-19 08:03:20,847 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:03:20,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279677720] [2022-11-19 08:03:20,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279677720] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:03:20,848 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:03:20,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:03:20,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942298134] [2022-11-19 08:03:20,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:03:20,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:03:20,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:03:20,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:03:20,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:03:20,850 INFO L87 Difference]: Start difference. First operand 8426 states and 12493 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-19 08:03:21,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:03:21,976 INFO L93 Difference]: Finished difference Result 24979 states and 37430 transitions. [2022-11-19 08:03:21,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:03:21,977 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 136 [2022-11-19 08:03:21,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:03:22,120 INFO L225 Difference]: With dead ends: 24979 [2022-11-19 08:03:22,120 INFO L226 Difference]: Without dead ends: 16558 [2022-11-19 08:03:22,161 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 [2022-11-19 08:03:22,162 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 171 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:03:22,162 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 343 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:03:22,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16558 states. [2022-11-19 08:03:23,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16558 to 16458. [2022-11-19 08:03:23,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16458 states, 13763 states have (on average 1.4882656397587735) internal successors, (20483), 13829 states have internal predecessors, (20483), 1862 states have call successors, (1862), 833 states have call predecessors, (1862), 832 states have return successors, (1860), 1796 states have call predecessors, (1860), 1860 states have call successors, (1860) [2022-11-19 08:03:23,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16458 states to 16458 states and 24205 transitions. [2022-11-19 08:03:23,535 INFO L78 Accepts]: Start accepts. Automaton has 16458 states and 24205 transitions. Word has length 136 [2022-11-19 08:03:23,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:03:23,537 INFO L495 AbstractCegarLoop]: Abstraction has 16458 states and 24205 transitions. [2022-11-19 08:03:23,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-19 08:03:23,538 INFO L276 IsEmpty]: Start isEmpty. Operand 16458 states and 24205 transitions. [2022-11-19 08:03:23,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-19 08:03:23,590 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:03:23,590 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, 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] [2022-11-19 08:03:23,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-19 08:03:23,591 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:03:23,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:03:23,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1521618851, now seen corresponding path program 1 times [2022-11-19 08:03:23,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:03:23,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720707473] [2022-11-19 08:03:23,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:03:23,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:03:23,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:03:23,737 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-19 08:03:23,737 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:03:23,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720707473] [2022-11-19 08:03:23,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720707473] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:03:23,738 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:03:23,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:03:23,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530937341] [2022-11-19 08:03:23,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:03:23,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:03:23,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:03:23,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:03:23,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:03:23,744 INFO L87 Difference]: Start difference. First operand 16458 states and 24205 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-19 08:03:25,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:03:25,742 INFO L93 Difference]: Finished difference Result 48787 states and 72470 transitions. [2022-11-19 08:03:25,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:03:25,743 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 136 [2022-11-19 08:03:25,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:03:25,939 INFO L225 Difference]: With dead ends: 48787 [2022-11-19 08:03:25,940 INFO L226 Difference]: Without dead ends: 32334 [2022-11-19 08:03:26,018 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 [2022-11-19 08:03:26,021 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 174 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:03:26,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 363 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:03:26,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32334 states. [2022-11-19 08:03:28,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32334 to 32138. [2022-11-19 08:03:28,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32138 states, 26883 states have (on average 1.476137335862813) internal successors, (39683), 27013 states have internal predecessors, (39683), 3590 states have call successors, (3590), 1665 states have call predecessors, (3590), 1664 states have return successors, (3588), 3460 states have call predecessors, (3588), 3588 states have call successors, (3588) [2022-11-19 08:03:28,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32138 states to 32138 states and 46861 transitions. [2022-11-19 08:03:28,405 INFO L78 Accepts]: Start accepts. Automaton has 32138 states and 46861 transitions. Word has length 136 [2022-11-19 08:03:28,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:03:28,406 INFO L495 AbstractCegarLoop]: Abstraction has 32138 states and 46861 transitions. [2022-11-19 08:03:28,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-19 08:03:28,408 INFO L276 IsEmpty]: Start isEmpty. Operand 32138 states and 46861 transitions. [2022-11-19 08:03:28,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-11-19 08:03:28,535 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:03:28,535 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, 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] [2022-11-19 08:03:28,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-19 08:03:28,536 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:03:28,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:03:28,537 INFO L85 PathProgramCache]: Analyzing trace with hash -406022532, now seen corresponding path program 1 times [2022-11-19 08:03:28,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:03:28,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058595078] [2022-11-19 08:03:28,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:03:28,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:03:28,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:03:28,768 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-11-19 08:03:28,768 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:03:28,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058595078] [2022-11-19 08:03:28,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058595078] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:03:28,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145101224] [2022-11-19 08:03:28,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:03:28,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:03:28,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5fba777-c5ba-413b-964b-d1fd1f1d732d/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:03:28,771 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5fba777-c5ba-413b-964b-d1fd1f1d732d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:03:28,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5fba777-c5ba-413b-964b-d1fd1f1d732d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 08:03:29,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:03:29,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 864 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 08:03:29,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:03:29,080 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-19 08:03:29,080 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:03:29,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145101224] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:03:29,081 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:03:29,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-19 08:03:29,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66594980] [2022-11-19 08:03:29,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:03:29,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:03:29,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:03:29,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:03:29,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:03:29,083 INFO L87 Difference]: Start difference. First operand 32138 states and 46861 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-19 08:03:31,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:03:31,670 INFO L93 Difference]: Finished difference Result 61266 states and 90323 transitions. [2022-11-19 08:03:31,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:03:31,672 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 156 [2022-11-19 08:03:31,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:03:31,935 INFO L225 Difference]: With dead ends: 61266 [2022-11-19 08:03:31,935 INFO L226 Difference]: Without dead ends: 44910 [2022-11-19 08:03:31,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:03:31,986 INFO L413 NwaCegarLoop]: 289 mSDtfsCounter, 134 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:03:31,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 466 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:03:32,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44910 states. [2022-11-19 08:03:34,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44910 to 38698. [2022-11-19 08:03:34,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38698 states, 33059 states have (on average 1.5139901388426753) internal successors, (50051), 33189 states have internal predecessors, (50051), 3782 states have call successors, (3782), 1857 states have call predecessors, (3782), 1856 states have return successors, (3780), 3652 states have call predecessors, (3780), 3780 states have call successors, (3780) [2022-11-19 08:03:35,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38698 states to 38698 states and 57613 transitions. [2022-11-19 08:03:35,017 INFO L78 Accepts]: Start accepts. Automaton has 38698 states and 57613 transitions. Word has length 156 [2022-11-19 08:03:35,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:03:35,018 INFO L495 AbstractCegarLoop]: Abstraction has 38698 states and 57613 transitions. [2022-11-19 08:03:35,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-19 08:03:35,019 INFO L276 IsEmpty]: Start isEmpty. Operand 38698 states and 57613 transitions. [2022-11-19 08:03:35,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-11-19 08:03:35,184 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:03:35,185 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, 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] [2022-11-19 08:03:35,209 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5fba777-c5ba-413b-964b-d1fd1f1d732d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-19 08:03:35,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5fba777-c5ba-413b-964b-d1fd1f1d732d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-19 08:03:35,392 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:03:35,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:03:35,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1965546049, now seen corresponding path program 2 times [2022-11-19 08:03:35,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:03:35,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567021937] [2022-11-19 08:03:35,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:03:35,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:03:35,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:03:35,950 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 10 proven. 49 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-11-19 08:03:35,950 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:03:35,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567021937] [2022-11-19 08:03:35,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567021937] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:03:35,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902560034] [2022-11-19 08:03:35,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:03:35,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:03:35,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5fba777-c5ba-413b-964b-d1fd1f1d732d/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:03:35,953 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5fba777-c5ba-413b-964b-d1fd1f1d732d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:03:35,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5fba777-c5ba-413b-964b-d1fd1f1d732d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 08:03:36,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-19 08:03:36,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:03:36,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 817 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-19 08:03:36,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:03:36,644 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 76 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-19 08:03:36,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:03:37,548 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 21 proven. 52 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-19 08:03:37,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902560034] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:03:37,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1663747149] [2022-11-19 08:03:37,576 INFO L159 IcfgInterpreter]: Started Sifa with 78 locations of interest [2022-11-19 08:03:37,576 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:03:37,581 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:03:37,587 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:03:37,588 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:04:28,998 WARN L233 SmtUtils]: Spent 5.95s on a formula simplification that was a NOOP. DAG size: 291 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2022-11-19 08:04:34,092 WARN L233 SmtUtils]: Spent 5.08s on a formula simplification that was a NOOP. DAG size: 291 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2022-11-19 08:05:21,670 WARN L233 SmtUtils]: Spent 6.41s on a formula simplification that was a NOOP. DAG size: 291 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2022-11-19 08:05:27,409 WARN L233 SmtUtils]: Spent 5.73s on a formula simplification that was a NOOP. DAG size: 291 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2022-11-19 08:06:54,058 WARN L233 SmtUtils]: Spent 5.26s on a formula simplification that was a NOOP. DAG size: 294 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2022-11-19 08:07:38,348 WARN L233 SmtUtils]: Spent 8.20s on a formula simplification that was a NOOP. DAG size: 495 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2022-11-19 08:07:47,889 INFO L197 IcfgInterpreter]: Interpreting procedure error with input of size 58 for LOIs [2022-11-19 08:07:47,896 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 152 for LOIs [2022-11-19 08:07:47,947 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 16 [2022-11-19 08:07:49,191 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 65536 conjuctions. This might take some time...