./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label40+token_ring.13.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 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_d3d12eba-2255-431a-9e13-799050a69284/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d12eba-2255-431a-9e13-799050a69284/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d12eba-2255-431a-9e13-799050a69284/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d12eba-2255-431a-9e13-799050a69284/bin/utaipan-g80aRyZoba/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label40+token_ring.13.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d12eba-2255-431a-9e13-799050a69284/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d12eba-2255-431a-9e13-799050a69284/bin/utaipan-g80aRyZoba --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 19aa3a10df20aa66b298603653689263cc3fd1e3f00b1be832baa1f64aefda99 --- 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-b5237d8 [2022-11-22 02:11:26,044 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 02:11:26,047 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 02:11:26,086 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 02:11:26,088 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 02:11:26,092 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 02:11:26,095 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 02:11:26,098 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 02:11:26,100 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 02:11:26,105 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 02:11:26,107 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 02:11:26,109 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 02:11:26,110 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 02:11:26,112 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 02:11:26,114 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 02:11:26,116 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 02:11:26,118 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 02:11:26,119 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 02:11:26,121 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 02:11:26,128 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 02:11:26,130 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 02:11:26,132 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 02:11:26,133 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 02:11:26,134 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 02:11:26,145 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 02:11:26,145 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 02:11:26,146 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 02:11:26,148 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 02:11:26,148 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 02:11:26,150 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 02:11:26,150 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 02:11:26,151 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 02:11:26,153 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 02:11:26,156 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 02:11:26,157 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 02:11:26,157 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 02:11:26,158 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 02:11:26,158 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 02:11:26,158 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 02:11:26,160 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 02:11:26,161 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 02:11:26,162 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d12eba-2255-431a-9e13-799050a69284/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-22 02:11:26,201 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 02:11:26,201 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 02:11:26,202 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 02:11:26,202 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 02:11:26,203 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 02:11:26,203 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 02:11:26,203 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 02:11:26,204 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 02:11:26,204 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 02:11:26,204 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 02:11:26,205 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 02:11:26,205 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 02:11:26,206 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 02:11:26,206 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 02:11:26,206 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 02:11:26,206 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 02:11:26,206 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 02:11:26,207 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 02:11:26,207 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 02:11:26,208 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 02:11:26,208 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 02:11:26,208 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 02:11:26,208 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 02:11:26,208 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-22 02:11:26,209 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 02:11:26,209 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-22 02:11:26,209 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 02:11:26,210 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-22 02:11:26,210 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 02:11:26,210 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-22 02:11:26,211 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 02:11:26,211 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 02:11:26,211 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:11:26,211 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 02:11:26,212 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 02:11:26,212 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 02:11:26,212 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-22 02:11:26,212 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 02:11:26,212 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 02:11:26,213 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-22 02:11:26,213 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 02:11:26,213 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_d3d12eba-2255-431a-9e13-799050a69284/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d12eba-2255-431a-9e13-799050a69284/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 19aa3a10df20aa66b298603653689263cc3fd1e3f00b1be832baa1f64aefda99 [2022-11-22 02:11:26,540 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 02:11:26,561 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 02:11:26,563 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 02:11:26,565 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 02:11:26,565 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 02:11:26,567 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d12eba-2255-431a-9e13-799050a69284/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/combinations/Problem05_label40+token_ring.13.cil-2.c [2022-11-22 02:11:29,667 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 02:11:30,519 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 02:11:30,520 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d12eba-2255-431a-9e13-799050a69284/sv-benchmarks/c/combinations/Problem05_label40+token_ring.13.cil-2.c [2022-11-22 02:11:30,579 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d12eba-2255-431a-9e13-799050a69284/bin/utaipan-g80aRyZoba/data/19eb6bc01/2256d099f5df4117a772146a112c8846/FLAG54e68fb98 [2022-11-22 02:11:30,595 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d12eba-2255-431a-9e13-799050a69284/bin/utaipan-g80aRyZoba/data/19eb6bc01/2256d099f5df4117a772146a112c8846 [2022-11-22 02:11:30,597 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 02:11:30,599 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 02:11:30,600 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 02:11:30,601 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 02:11:30,604 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 02:11:30,605 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:11:30" (1/1) ... [2022-11-22 02:11:30,606 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10d2c09d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:11:30, skipping insertion in model container [2022-11-22 02:11:30,607 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:11:30" (1/1) ... [2022-11-22 02:11:30,614 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 02:11:30,856 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 02:11:33,071 WARN L237 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_d3d12eba-2255-431a-9e13-799050a69284/sv-benchmarks/c/combinations/Problem05_label40+token_ring.13.cil-2.c[377069,377082] [2022-11-22 02:11:33,112 WARN L237 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_d3d12eba-2255-431a-9e13-799050a69284/sv-benchmarks/c/combinations/Problem05_label40+token_ring.13.cil-2.c[383339,383352] [2022-11-22 02:11:33,575 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:11:33,587 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 02:11:34,842 WARN L237 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_d3d12eba-2255-431a-9e13-799050a69284/sv-benchmarks/c/combinations/Problem05_label40+token_ring.13.cil-2.c[377069,377082] [2022-11-22 02:11:34,852 WARN L237 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_d3d12eba-2255-431a-9e13-799050a69284/sv-benchmarks/c/combinations/Problem05_label40+token_ring.13.cil-2.c[383339,383352] [2022-11-22 02:11:34,876 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:11:34,939 INFO L208 MainTranslator]: Completed translation [2022-11-22 02:11:34,940 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:11:34 WrapperNode [2022-11-22 02:11:34,940 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 02:11:34,941 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 02:11:34,941 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 02:11:34,941 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 02:11:34,948 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:11:34" (1/1) ... [2022-11-22 02:11:35,021 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:11:34" (1/1) ... [2022-11-22 02:11:35,436 INFO L138 Inliner]: procedures = 70, calls = 80, calls flagged for inlining = 48, calls inlined = 48, statements flattened = 13257 [2022-11-22 02:11:35,436 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 02:11:35,437 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 02:11:35,438 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 02:11:35,438 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 02:11:35,448 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:11:34" (1/1) ... [2022-11-22 02:11:35,449 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:11:34" (1/1) ... [2022-11-22 02:11:35,517 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:11:34" (1/1) ... [2022-11-22 02:11:35,518 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:11:34" (1/1) ... [2022-11-22 02:11:35,870 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:11:34" (1/1) ... [2022-11-22 02:11:35,979 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:11:34" (1/1) ... [2022-11-22 02:11:36,045 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:11:34" (1/1) ... [2022-11-22 02:11:36,078 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:11:34" (1/1) ... [2022-11-22 02:11:36,178 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 02:11:36,191 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 02:11:36,206 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 02:11:36,207 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 02:11:36,208 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:11:34" (1/1) ... [2022-11-22 02:11:36,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:11:36,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d12eba-2255-431a-9e13-799050a69284/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:11:36,251 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d12eba-2255-431a-9e13-799050a69284/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 02:11:36,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d12eba-2255-431a-9e13-799050a69284/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 02:11:36,310 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 02:11:36,310 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-11-22 02:11:36,310 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-11-22 02:11:36,311 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-22 02:11:36,311 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-22 02:11:36,311 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-11-22 02:11:36,311 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-11-22 02:11:36,311 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-11-22 02:11:36,312 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-11-22 02:11:36,312 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-11-22 02:11:36,312 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-11-22 02:11:36,312 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-11-22 02:11:36,312 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-11-22 02:11:36,312 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 02:11:36,313 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 02:11:36,313 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 02:11:36,556 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 02:11:36,573 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 02:11:45,797 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 02:11:48,459 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 02:11:48,459 INFO L300 CfgBuilder]: Removed 17 assume(true) statements. [2022-11-22 02:11:48,464 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:11:48 BoogieIcfgContainer [2022-11-22 02:11:48,464 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 02:11:48,468 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 02:11:48,468 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 02:11:48,471 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 02:11:48,471 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 02:11:30" (1/3) ... [2022-11-22 02:11:48,472 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@205a058f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:11:48, skipping insertion in model container [2022-11-22 02:11:48,472 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:11:34" (2/3) ... [2022-11-22 02:11:48,473 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@205a058f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:11:48, skipping insertion in model container [2022-11-22 02:11:48,473 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:11:48" (3/3) ... [2022-11-22 02:11:48,474 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label40+token_ring.13.cil-2.c [2022-11-22 02:11:48,495 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 02:11:48,495 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-22 02:11:48,587 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 02:11:48,593 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;@28351e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 02:11:48,593 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-22 02:11:48,605 INFO L276 IsEmpty]: Start isEmpty. Operand has 1842 states, 1806 states have (on average 1.9540420819490587) internal successors, (3529), 1809 states have internal predecessors, (3529), 27 states have call successors, (27), 6 states have call predecessors, (27), 6 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2022-11-22 02:11:48,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-22 02:11:48,618 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:11:48,619 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:11:48,619 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:11:48,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:11:48,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1029859456, now seen corresponding path program 1 times [2022-11-22 02:11:48,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:11:48,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156293845] [2022-11-22 02:11:48,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:11:48,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:11:48,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:11:49,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:11:49,216 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:11:49,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156293845] [2022-11-22 02:11:49,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156293845] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:11:49,218 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:11:49,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 02:11:49,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634987009] [2022-11-22 02:11:49,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:11:49,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:11:49,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:11:49,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:11:49,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:11:49,277 INFO L87 Difference]: Start difference. First operand has 1842 states, 1806 states have (on average 1.9540420819490587) internal successors, (3529), 1809 states have internal predecessors, (3529), 27 states have call successors, (27), 6 states have call predecessors, (27), 6 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-22 02:11:50,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:11:50,584 INFO L93 Difference]: Finished difference Result 3866 states and 7483 transitions. [2022-11-22 02:11:50,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 02:11:50,587 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 70 [2022-11-22 02:11:50,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:11:50,615 INFO L225 Difference]: With dead ends: 3866 [2022-11-22 02:11:50,615 INFO L226 Difference]: Without dead ends: 2023 [2022-11-22 02:11:50,628 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 [2022-11-22 02:11:50,632 INFO L413 NwaCegarLoop]: 3541 mSDtfsCounter, 3812 mSDsluCounter, 3439 mSDsCounter, 0 mSdLazyCounter, 742 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3812 SdHoareTripleChecker+Valid, 6980 SdHoareTripleChecker+Invalid, 756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:11:50,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3812 Valid, 6980 Invalid, 756 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 742 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-22 02:11:50,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2023 states. [2022-11-22 02:11:50,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2023 to 2022. [2022-11-22 02:11:50,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2022 states, 1958 states have (on average 1.916241062308478) internal successors, (3752), 1961 states have internal predecessors, (3752), 50 states have call successors, (50), 12 states have call predecessors, (50), 12 states have return successors, (50), 49 states have call predecessors, (50), 50 states have call successors, (50) [2022-11-22 02:11:50,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2022 states to 2022 states and 3852 transitions. [2022-11-22 02:11:50,782 INFO L78 Accepts]: Start accepts. Automaton has 2022 states and 3852 transitions. Word has length 70 [2022-11-22 02:11:50,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:11:50,783 INFO L495 AbstractCegarLoop]: Abstraction has 2022 states and 3852 transitions. [2022-11-22 02:11:50,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-22 02:11:50,783 INFO L276 IsEmpty]: Start isEmpty. Operand 2022 states and 3852 transitions. [2022-11-22 02:11:50,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-22 02:11:50,799 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:11:50,800 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:11:50,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 02:11:50,801 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:11:50,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:11:50,802 INFO L85 PathProgramCache]: Analyzing trace with hash -2127836520, now seen corresponding path program 1 times [2022-11-22 02:11:50,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:11:50,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080112407] [2022-11-22 02:11:50,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:11:50,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:11:50,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:11:51,263 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-22 02:11:51,264 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:11:51,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080112407] [2022-11-22 02:11:51,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080112407] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:11:51,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256365899] [2022-11-22 02:11:51,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:11:51,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:11:51,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d12eba-2255-431a-9e13-799050a69284/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:11:51,273 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d12eba-2255-431a-9e13-799050a69284/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:11:51,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d12eba-2255-431a-9e13-799050a69284/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 02:11:51,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:11:51,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 1116 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-22 02:11:51,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:11:51,713 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-22 02:11:51,713 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:11:51,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256365899] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:11:51,714 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:11:51,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-22 02:11:51,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368717749] [2022-11-22 02:11:51,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:11:51,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:11:51,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:11:51,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:11:51,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:11:51,717 INFO L87 Difference]: Start difference. First operand 2022 states and 3852 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 2 states have internal predecessors, (107), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-22 02:11:52,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:11:52,315 INFO L93 Difference]: Finished difference Result 2767 states and 5025 transitions. [2022-11-22 02:11:52,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:11:52,316 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 2 states have internal predecessors, (107), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 143 [2022-11-22 02:11:52,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:11:52,329 INFO L225 Difference]: With dead ends: 2767 [2022-11-22 02:11:52,329 INFO L226 Difference]: Without dead ends: 2391 [2022-11-22 02:11:52,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:11:52,334 INFO L413 NwaCegarLoop]: 3360 mSDtfsCounter, 3525 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3525 SdHoareTripleChecker+Valid, 3600 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 02:11:52,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3525 Valid, 3600 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-22 02:11:52,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2391 states. [2022-11-22 02:11:52,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2391 to 2387. [2022-11-22 02:11:52,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2387 states, 2267 states have (on average 1.8619320688134098) internal successors, (4221), 2271 states have internal predecessors, (4221), 94 states have call successors, (94), 24 states have call predecessors, (94), 24 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2022-11-22 02:11:52,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2387 states to 2387 states and 4409 transitions. [2022-11-22 02:11:52,545 INFO L78 Accepts]: Start accepts. Automaton has 2387 states and 4409 transitions. Word has length 143 [2022-11-22 02:11:52,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:11:52,546 INFO L495 AbstractCegarLoop]: Abstraction has 2387 states and 4409 transitions. [2022-11-22 02:11:52,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 2 states have internal predecessors, (107), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-22 02:11:52,546 INFO L276 IsEmpty]: Start isEmpty. Operand 2387 states and 4409 transitions. [2022-11-22 02:11:52,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-22 02:11:52,550 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:11:52,551 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:11:52,568 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d12eba-2255-431a-9e13-799050a69284/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-22 02:11:52,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d12eba-2255-431a-9e13-799050a69284/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:11:52,752 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:11:52,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:11:52,753 INFO L85 PathProgramCache]: Analyzing trace with hash 1581112986, now seen corresponding path program 1 times [2022-11-22 02:11:52,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:11:52,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653219845] [2022-11-22 02:11:52,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:11:52,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:11:52,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:11:52,960 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-22 02:11:52,961 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:11:52,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653219845] [2022-11-22 02:11:52,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653219845] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:11:52,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090454774] [2022-11-22 02:11:52,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:11:52,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:11:52,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d12eba-2255-431a-9e13-799050a69284/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:11:52,963 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d12eba-2255-431a-9e13-799050a69284/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:11:52,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d12eba-2255-431a-9e13-799050a69284/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-22 02:11:53,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:11:53,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 1110 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-22 02:11:53,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:11:53,326 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-22 02:11:53,326 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:11:53,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090454774] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:11:53,327 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:11:53,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-22 02:11:53,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198139095] [2022-11-22 02:11:53,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:11:53,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:11:53,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:11:53,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:11:53,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:11:53,330 INFO L87 Difference]: Start difference. First operand 2387 states and 4409 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-22 02:11:54,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:11:54,016 INFO L93 Difference]: Finished difference Result 3856 states and 6716 transitions. [2022-11-22 02:11:54,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:11:54,017 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 143 [2022-11-22 02:11:54,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:11:54,039 INFO L225 Difference]: With dead ends: 3856 [2022-11-22 02:11:54,039 INFO L226 Difference]: Without dead ends: 3115 [2022-11-22 02:11:54,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:11:54,044 INFO L413 NwaCegarLoop]: 3348 mSDtfsCounter, 3537 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3537 SdHoareTripleChecker+Valid, 3588 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-22 02:11:54,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3537 Valid, 3588 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-22 02:11:54,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3115 states. [2022-11-22 02:11:54,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3115 to 3109. [2022-11-22 02:11:54,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3109 states, 2879 states have (on average 1.7877735324765545) internal successors, (5147), 2885 states have internal predecessors, (5147), 180 states have call successors, (180), 48 states have call predecessors, (180), 48 states have return successors, (180), 176 states have call predecessors, (180), 180 states have call successors, (180) [2022-11-22 02:11:54,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3109 states to 3109 states and 5507 transitions. [2022-11-22 02:11:54,223 INFO L78 Accepts]: Start accepts. Automaton has 3109 states and 5507 transitions. Word has length 143 [2022-11-22 02:11:54,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:11:54,224 INFO L495 AbstractCegarLoop]: Abstraction has 3109 states and 5507 transitions. [2022-11-22 02:11:54,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-22 02:11:54,224 INFO L276 IsEmpty]: Start isEmpty. Operand 3109 states and 5507 transitions. [2022-11-22 02:11:54,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-22 02:11:54,229 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:11:54,230 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:11:54,241 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d12eba-2255-431a-9e13-799050a69284/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-22 02:11:54,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d12eba-2255-431a-9e13-799050a69284/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-11-22 02:11:54,437 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:11:54,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:11:54,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1238892444, now seen corresponding path program 1 times [2022-11-22 02:11:54,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:11:54,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396178560] [2022-11-22 02:11:54,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:11:54,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:11:54,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:11:54,664 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-22 02:11:54,664 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:11:54,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396178560] [2022-11-22 02:11:54,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396178560] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:11:54,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089731132] [2022-11-22 02:11:54,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:11:54,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:11:54,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d12eba-2255-431a-9e13-799050a69284/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:11:54,671 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d12eba-2255-431a-9e13-799050a69284/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:11:54,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d12eba-2255-431a-9e13-799050a69284/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-22 02:11:54,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:11:54,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 1104 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-22 02:11:54,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:11:55,059 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-22 02:11:55,060 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:11:55,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089731132] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:11:55,060 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:11:55,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-22 02:11:55,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726655510] [2022-11-22 02:11:55,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:11:55,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:11:55,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:11:55,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:11:55,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:11:55,064 INFO L87 Difference]: Start difference. First operand 3109 states and 5507 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-22 02:11:55,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:11:55,677 INFO L93 Difference]: Finished difference Result 6010 states and 10048 transitions. [2022-11-22 02:11:55,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:11:55,678 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 143 [2022-11-22 02:11:55,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:11:55,704 INFO L225 Difference]: With dead ends: 6010 [2022-11-22 02:11:55,705 INFO L226 Difference]: Without dead ends: 4547 [2022-11-22 02:11:55,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:11:55,712 INFO L413 NwaCegarLoop]: 3326 mSDtfsCounter, 3519 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3519 SdHoareTripleChecker+Valid, 3566 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 02:11:55,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3519 Valid, 3566 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 02:11:55,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4547 states. [2022-11-22 02:11:55,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4547 to 4537. [2022-11-22 02:11:55,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4537 states, 4091 states have (on average 1.7049621119530678) internal successors, (6975), 4101 states have internal predecessors, (6975), 348 states have call successors, (348), 96 states have call predecessors, (348), 96 states have return successors, (348), 340 states have call predecessors, (348), 348 states have call successors, (348) [2022-11-22 02:11:55,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4537 states to 4537 states and 7671 transitions. [2022-11-22 02:11:55,927 INFO L78 Accepts]: Start accepts. Automaton has 4537 states and 7671 transitions. Word has length 143 [2022-11-22 02:11:55,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:11:55,927 INFO L495 AbstractCegarLoop]: Abstraction has 4537 states and 7671 transitions. [2022-11-22 02:11:55,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-22 02:11:55,928 INFO L276 IsEmpty]: Start isEmpty. Operand 4537 states and 7671 transitions. [2022-11-22 02:11:55,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-22 02:11:55,939 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:11:55,939 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:11:55,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d12eba-2255-431a-9e13-799050a69284/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-22 02:11:56,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d12eba-2255-431a-9e13-799050a69284/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:11:56,151 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:11:56,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:11:56,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1828602594, now seen corresponding path program 1 times [2022-11-22 02:11:56,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:11:56,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364412326] [2022-11-22 02:11:56,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:11:56,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:11:56,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:11:56,379 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-22 02:11:56,379 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:11:56,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364412326] [2022-11-22 02:11:56,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364412326] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:11:56,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383623833] [2022-11-22 02:11:56,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:11:56,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:11:56,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d12eba-2255-431a-9e13-799050a69284/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:11:56,381 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d12eba-2255-431a-9e13-799050a69284/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:11:56,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d12eba-2255-431a-9e13-799050a69284/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-22 02:11:56,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:11:56,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 1098 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-22 02:11:56,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:11:56,723 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-22 02:11:56,723 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:11:56,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383623833] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:11:56,724 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:11:56,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-22 02:11:56,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868344121] [2022-11-22 02:11:56,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:11:56,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:11:56,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:11:56,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:11:56,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:11:56,726 INFO L87 Difference]: Start difference. First operand 4537 states and 7671 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-22 02:11:57,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:11:57,435 INFO L93 Difference]: Finished difference Result 10270 states and 16612 transitions. [2022-11-22 02:11:57,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:11:57,436 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 143 [2022-11-22 02:11:57,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:11:57,479 INFO L225 Difference]: With dead ends: 10270 [2022-11-22 02:11:57,480 INFO L226 Difference]: Without dead ends: 7379 [2022-11-22 02:11:57,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:11:57,496 INFO L413 NwaCegarLoop]: 3346 mSDtfsCounter, 3543 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3543 SdHoareTripleChecker+Valid, 3586 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 02:11:57,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3543 Valid, 3586 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-22 02:11:57,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7379 states. [2022-11-22 02:11:57,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7379 to 7361. [2022-11-22 02:11:57,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7361 states, 6491 states have (on average 1.6304113387767678) internal successors, (10583), 6509 states have internal predecessors, (10583), 676 states have call successors, (676), 192 states have call predecessors, (676), 192 states have return successors, (676), 660 states have call predecessors, (676), 676 states have call successors, (676) [2022-11-22 02:11:57,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7361 states to 7361 states and 11935 transitions. [2022-11-22 02:11:57,946 INFO L78 Accepts]: Start accepts. Automaton has 7361 states and 11935 transitions. Word has length 143 [2022-11-22 02:11:57,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:11:57,947 INFO L495 AbstractCegarLoop]: Abstraction has 7361 states and 11935 transitions. [2022-11-22 02:11:57,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-22 02:11:57,950 INFO L276 IsEmpty]: Start isEmpty. Operand 7361 states and 11935 transitions. [2022-11-22 02:11:57,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-22 02:11:57,962 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:11:57,962 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:11:57,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d12eba-2255-431a-9e13-799050a69284/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-22 02:11:58,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d12eba-2255-431a-9e13-799050a69284/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:11:58,170 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:11:58,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:11:58,170 INFO L85 PathProgramCache]: Analyzing trace with hash -91515744, now seen corresponding path program 1 times [2022-11-22 02:11:58,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:11:58,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657866082] [2022-11-22 02:11:58,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:11:58,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:11:58,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:11:58,354 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-22 02:11:58,355 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:11:58,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657866082] [2022-11-22 02:11:58,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657866082] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:11:58,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196574298] [2022-11-22 02:11:58,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:11:58,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:11:58,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d12eba-2255-431a-9e13-799050a69284/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:11:58,357 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d12eba-2255-431a-9e13-799050a69284/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:11:58,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d12eba-2255-431a-9e13-799050a69284/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-22 02:11:58,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:11:58,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 1092 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-22 02:11:58,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:11:58,683 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-22 02:11:58,683 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:11:58,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196574298] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:11:58,683 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:11:58,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-22 02:11:58,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665796626] [2022-11-22 02:11:58,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:11:58,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:11:58,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:11:58,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:11:58,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:11:58,685 INFO L87 Difference]: Start difference. First operand 7361 states and 11935 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-22 02:11:59,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:11:59,560 INFO L93 Difference]: Finished difference Result 18694 states and 29540 transitions. [2022-11-22 02:11:59,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:11:59,561 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 143 [2022-11-22 02:11:59,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:11:59,644 INFO L225 Difference]: With dead ends: 18694 [2022-11-22 02:11:59,645 INFO L226 Difference]: Without dead ends: 12979 [2022-11-22 02:11:59,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:11:59,676 INFO L413 NwaCegarLoop]: 3356 mSDtfsCounter, 3546 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3546 SdHoareTripleChecker+Valid, 3596 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 02:11:59,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3546 Valid, 3596 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-22 02:11:59,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12979 states. [2022-11-22 02:12:00,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12979 to 12945. [2022-11-22 02:12:00,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12945 states, 11243 states have (on average 1.574579738503958) internal successors, (17703), 11277 states have internal predecessors, (17703), 1316 states have call successors, (1316), 384 states have call predecessors, (1316), 384 states have return successors, (1316), 1284 states have call predecessors, (1316), 1316 states have call successors, (1316) [2022-11-22 02:12:00,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12945 states to 12945 states and 20335 transitions. [2022-11-22 02:12:00,296 INFO L78 Accepts]: Start accepts. Automaton has 12945 states and 20335 transitions. Word has length 143 [2022-11-22 02:12:00,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:12:00,298 INFO L495 AbstractCegarLoop]: Abstraction has 12945 states and 20335 transitions. [2022-11-22 02:12:00,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-22 02:12:00,299 INFO L276 IsEmpty]: Start isEmpty. Operand 12945 states and 20335 transitions. [2022-11-22 02:12:00,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-22 02:12:00,323 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:12:00,323 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:12:00,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d12eba-2255-431a-9e13-799050a69284/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-22 02:12:00,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d12eba-2255-431a-9e13-799050a69284/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:12:00,530 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:12:00,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:12:00,531 INFO L85 PathProgramCache]: Analyzing trace with hash -598116898, now seen corresponding path program 1 times [2022-11-22 02:12:00,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:12:00,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36951771] [2022-11-22 02:12:00,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:12:00,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:12:00,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:12:00,864 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-22 02:12:00,864 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:12:00,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36951771] [2022-11-22 02:12:00,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36951771] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:12:00,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728534422] [2022-11-22 02:12:00,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:12:00,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:12:00,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d12eba-2255-431a-9e13-799050a69284/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:12:00,866 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d12eba-2255-431a-9e13-799050a69284/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:12:00,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d12eba-2255-431a-9e13-799050a69284/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-22 02:12:01,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:12:01,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 1086 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-22 02:12:01,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:12:01,239 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-22 02:12:01,239 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:12:01,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728534422] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:12:01,240 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:12:01,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-22 02:12:01,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213335321] [2022-11-22 02:12:01,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:12:01,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:12:01,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:12:01,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:12:01,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:12:01,242 INFO L87 Difference]: Start difference. First operand 12945 states and 20335 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-22 02:12:02,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:12:02,497 INFO L93 Difference]: Finished difference Result 35350 states and 54996 transitions. [2022-11-22 02:12:02,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:12:02,498 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 143 [2022-11-22 02:12:02,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:12:02,605 INFO L225 Difference]: With dead ends: 35350 [2022-11-22 02:12:02,606 INFO L226 Difference]: Without dead ends: 24051 [2022-11-22 02:12:02,652 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:12:02,653 INFO L413 NwaCegarLoop]: 3326 mSDtfsCounter, 3516 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3516 SdHoareTripleChecker+Valid, 3566 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 02:12:02,654 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3516 Valid, 3566 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 02:12:02,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24051 states. [2022-11-22 02:12:04,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24051 to 23985. [2022-11-22 02:12:04,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23985 states, 20651 states have (on average 1.53750423708295) internal successors, (31751), 20717 states have internal predecessors, (31751), 2564 states have call successors, (2564), 768 states have call predecessors, (2564), 768 states have return successors, (2564), 2500 states have call predecessors, (2564), 2564 states have call successors, (2564) [2022-11-22 02:12:04,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23985 states to 23985 states and 36879 transitions. [2022-11-22 02:12:04,295 INFO L78 Accepts]: Start accepts. Automaton has 23985 states and 36879 transitions. Word has length 143 [2022-11-22 02:12:04,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:12:04,296 INFO L495 AbstractCegarLoop]: Abstraction has 23985 states and 36879 transitions. [2022-11-22 02:12:04,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-22 02:12:04,296 INFO L276 IsEmpty]: Start isEmpty. Operand 23985 states and 36879 transitions. [2022-11-22 02:12:04,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-22 02:12:04,350 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:12:04,355 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:12:04,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d12eba-2255-431a-9e13-799050a69284/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-22 02:12:04,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d12eba-2255-431a-9e13-799050a69284/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:12:04,572 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:12:04,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:12:04,572 INFO L85 PathProgramCache]: Analyzing trace with hash -2007337060, now seen corresponding path program 1 times [2022-11-22 02:12:04,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:12:04,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959536655] [2022-11-22 02:12:04,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:12:04,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:12:04,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:12:04,849 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-22 02:12:04,849 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:12:04,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959536655] [2022-11-22 02:12:04,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959536655] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:12:04,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768008127] [2022-11-22 02:12:04,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:12:04,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:12:04,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d12eba-2255-431a-9e13-799050a69284/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:12:04,852 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d12eba-2255-431a-9e13-799050a69284/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:12:04,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d12eba-2255-431a-9e13-799050a69284/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-22 02:12:05,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:12:05,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 1080 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-22 02:12:05,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:12:05,203 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-22 02:12:05,209 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:12:05,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768008127] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:12:05,209 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:12:05,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-22 02:12:05,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112424987] [2022-11-22 02:12:05,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:12:05,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:12:05,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:12:05,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:12:05,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:12:05,212 INFO L87 Difference]: Start difference. First operand 23985 states and 36879 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 2 states have internal predecessors, (101), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-22 02:12:07,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:12:07,418 INFO L93 Difference]: Finished difference Result 68278 states and 105108 transitions. [2022-11-22 02:12:07,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:12:07,419 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 2 states have internal predecessors, (101), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 143 [2022-11-22 02:12:07,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:12:07,647 INFO L225 Difference]: With dead ends: 68278 [2022-11-22 02:12:07,648 INFO L226 Difference]: Without dead ends: 45939 [2022-11-22 02:12:07,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:12:07,960 INFO L413 NwaCegarLoop]: 3326 mSDtfsCounter, 3531 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3531 SdHoareTripleChecker+Valid, 3566 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 02:12:07,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3531 Valid, 3566 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-22 02:12:08,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45939 states. [2022-11-22 02:12:10,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45939 to 45809. [2022-11-22 02:12:10,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45809 states, 39275 states have (on average 1.514016549968173) internal successors, (59463), 39405 states have internal predecessors, (59463), 4996 states have call successors, (4996), 1536 states have call predecessors, (4996), 1536 states have return successors, (4996), 4868 states have call predecessors, (4996), 4996 states have call successors, (4996) [2022-11-22 02:12:10,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45809 states to 45809 states and 69455 transitions. [2022-11-22 02:12:10,546 INFO L78 Accepts]: Start accepts. Automaton has 45809 states and 69455 transitions. Word has length 143 [2022-11-22 02:12:10,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:12:10,546 INFO L495 AbstractCegarLoop]: Abstraction has 45809 states and 69455 transitions. [2022-11-22 02:12:10,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 2 states have internal predecessors, (101), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-22 02:12:10,547 INFO L276 IsEmpty]: Start isEmpty. Operand 45809 states and 69455 transitions. [2022-11-22 02:12:10,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-22 02:12:10,647 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:12:10,647 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:12:10,660 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d12eba-2255-431a-9e13-799050a69284/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-22 02:12:10,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3d12eba-2255-431a-9e13-799050a69284/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-22 02:12:10,855 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:12:10,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:12:10,856 INFO L85 PathProgramCache]: Analyzing trace with hash 911868446, now seen corresponding path program 1 times [2022-11-22 02:12:10,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:12:10,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812215614] [2022-11-22 02:12:10,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:12:10,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:12:10,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:12:11,811 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-22 02:12:11,812 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:12:11,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812215614] [2022-11-22 02:12:11,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812215614] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:12:11,812 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:12:11,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-22 02:12:11,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732885755] [2022-11-22 02:12:11,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:12:11,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 02:12:11,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:12:11,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 02:12:11,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:12:11,817 INFO L87 Difference]: Start difference. First operand 45809 states and 69455 transitions. Second operand has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-22 02:12:17,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:12:17,002 INFO L93 Difference]: Finished difference Result 156917 states and 235730 transitions. [2022-11-22 02:12:17,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-22 02:12:17,003 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 143 [2022-11-22 02:12:17,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:12:17,740 INFO L225 Difference]: With dead ends: 156917 [2022-11-22 02:12:17,740 INFO L226 Difference]: Without dead ends: 112755 [2022-11-22 02:12:17,865 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-22 02:12:17,868 INFO L413 NwaCegarLoop]: 3328 mSDtfsCounter, 4487 mSDsluCounter, 6601 mSDsCounter, 0 mSdLazyCounter, 950 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4509 SdHoareTripleChecker+Valid, 9929 SdHoareTripleChecker+Invalid, 1097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 950 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:12:17,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4509 Valid, 9929 Invalid, 1097 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [147 Valid, 950 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-22 02:12:17,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112755 states. [2022-11-22 02:12:22,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112755 to 88433. [2022-11-22 02:12:23,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88433 states, 75627 states have (on average 1.4988165602232006) internal successors, (113351), 75885 states have internal predecessors, (113351), 9732 states have call successors, (9732), 3072 states have call predecessors, (9732), 3072 states have return successors, (9732), 9476 states have call predecessors, (9732), 9732 states have call successors, (9732) [2022-11-22 02:12:23,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88433 states to 88433 states and 132815 transitions. [2022-11-22 02:12:23,397 INFO L78 Accepts]: Start accepts. Automaton has 88433 states and 132815 transitions. Word has length 143 [2022-11-22 02:12:23,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:12:23,399 INFO L495 AbstractCegarLoop]: Abstraction has 88433 states and 132815 transitions. [2022-11-22 02:12:23,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-22 02:12:23,399 INFO L276 IsEmpty]: Start isEmpty. Operand 88433 states and 132815 transitions. [2022-11-22 02:12:23,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-11-22 02:12:23,562 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:12:23,562 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:12:23,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-22 02:12:23,563 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:12:23,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:12:23,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1416129421, now seen corresponding path program 1 times [2022-11-22 02:12:23,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:12:23,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554266385] [2022-11-22 02:12:23,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:12:23,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:12:23,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:12:24,591 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-22 02:12:24,592 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:12:24,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554266385] [2022-11-22 02:12:24,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554266385] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:12:24,592 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:12:24,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-22 02:12:24,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307087617] [2022-11-22 02:12:24,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:12:24,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 02:12:24,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:12:24,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 02:12:24,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:12:24,594 INFO L87 Difference]: Start difference. First operand 88433 states and 132815 transitions. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-22 02:12:33,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:12:33,303 INFO L93 Difference]: Finished difference Result 238325 states and 357457 transitions. [2022-11-22 02:12:33,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-22 02:12:33,307 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 144 [2022-11-22 02:12:33,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:12:34,488 INFO L225 Difference]: With dead ends: 238325 [2022-11-22 02:12:34,489 INFO L226 Difference]: Without dead ends: 151539 [2022-11-22 02:12:34,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-22 02:12:34,727 INFO L413 NwaCegarLoop]: 3320 mSDtfsCounter, 4256 mSDsluCounter, 9899 mSDsCounter, 0 mSdLazyCounter, 1258 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4262 SdHoareTripleChecker+Valid, 13219 SdHoareTripleChecker+Invalid, 1415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 1258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:12:34,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4262 Valid, 13219 Invalid, 1415 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [157 Valid, 1258 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-22 02:12:34,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151539 states.