./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label46+token_ring.10.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a 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_a322b7a4-4eee-4e71-ad21-2829cbc8afbc/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a322b7a4-4eee-4e71-ad21-2829cbc8afbc/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a322b7a4-4eee-4e71-ad21-2829cbc8afbc/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a322b7a4-4eee-4e71-ad21-2829cbc8afbc/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label46+token_ring.10.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a322b7a4-4eee-4e71-ad21-2829cbc8afbc/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a322b7a4-4eee-4e71-ad21-2829cbc8afbc/bin/utaipan-7li7fVZpFI --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 906e84f0a25a0f5132fcddd369ea6157dd86409b963593c3fbd2737ae25908f1 --- 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-5e519f3 [2022-11-03 04:01:17,424 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 04:01:17,426 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 04:01:17,457 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 04:01:17,457 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 04:01:17,462 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 04:01:17,465 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 04:01:17,469 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 04:01:17,472 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 04:01:17,479 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 04:01:17,480 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 04:01:17,483 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 04:01:17,484 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 04:01:17,488 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 04:01:17,490 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 04:01:17,491 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 04:01:17,493 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 04:01:17,494 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 04:01:17,496 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 04:01:17,504 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 04:01:17,506 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 04:01:17,511 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 04:01:17,512 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 04:01:17,512 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 04:01:17,515 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 04:01:17,516 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 04:01:17,516 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 04:01:17,517 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 04:01:17,517 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 04:01:17,518 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 04:01:17,518 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 04:01:17,519 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 04:01:17,520 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 04:01:17,521 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 04:01:17,522 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 04:01:17,522 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 04:01:17,523 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 04:01:17,525 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 04:01:17,525 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 04:01:17,526 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 04:01:17,527 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 04:01:17,528 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a322b7a4-4eee-4e71-ad21-2829cbc8afbc/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 04:01:17,565 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 04:01:17,565 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 04:01:17,566 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 04:01:17,566 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 04:01:17,567 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 04:01:17,571 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 04:01:17,571 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 04:01:17,571 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 04:01:17,571 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 04:01:17,572 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 04:01:17,572 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 04:01:17,573 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 04:01:17,573 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 04:01:17,573 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 04:01:17,573 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 04:01:17,573 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 04:01:17,574 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 04:01:17,574 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 04:01:17,574 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 04:01:17,575 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 04:01:17,575 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 04:01:17,575 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 04:01:17,575 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 04:01:17,576 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 04:01:17,576 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 04:01:17,576 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 04:01:17,576 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 04:01:17,576 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 04:01:17,577 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 04:01:17,577 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 04:01:17,577 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 04:01:17,577 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 04:01:17,578 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 04:01:17,578 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 04:01:17,578 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 04:01:17,578 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 04:01:17,578 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 04:01:17,578 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 04:01:17,579 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 04:01:17,579 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 04:01:17,579 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 04:01:17,579 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_a322b7a4-4eee-4e71-ad21-2829cbc8afbc/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a322b7a4-4eee-4e71-ad21-2829cbc8afbc/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 906e84f0a25a0f5132fcddd369ea6157dd86409b963593c3fbd2737ae25908f1 [2022-11-03 04:01:17,844 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 04:01:17,866 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 04:01:17,868 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 04:01:17,869 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 04:01:17,870 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 04:01:17,872 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a322b7a4-4eee-4e71-ad21-2829cbc8afbc/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/combinations/Problem05_label46+token_ring.10.cil-1.c [2022-11-03 04:01:17,945 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a322b7a4-4eee-4e71-ad21-2829cbc8afbc/bin/utaipan-7li7fVZpFI/data/d68dde581/a1cc5da3991f4809820da726d006761c/FLAGd439474cc [2022-11-03 04:01:18,916 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 04:01:18,917 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a322b7a4-4eee-4e71-ad21-2829cbc8afbc/sv-benchmarks/c/combinations/Problem05_label46+token_ring.10.cil-1.c [2022-11-03 04:01:18,989 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a322b7a4-4eee-4e71-ad21-2829cbc8afbc/bin/utaipan-7li7fVZpFI/data/d68dde581/a1cc5da3991f4809820da726d006761c/FLAGd439474cc [2022-11-03 04:01:19,245 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a322b7a4-4eee-4e71-ad21-2829cbc8afbc/bin/utaipan-7li7fVZpFI/data/d68dde581/a1cc5da3991f4809820da726d006761c [2022-11-03 04:01:19,249 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 04:01:19,252 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 04:01:19,255 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 04:01:19,255 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 04:01:19,259 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 04:01:19,260 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:01:19" (1/1) ... [2022-11-03 04:01:19,261 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@415ebef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:19, skipping insertion in model container [2022-11-03 04:01:19,262 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:01:19" (1/1) ... [2022-11-03 04:01:19,269 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 04:01:19,529 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 04:01:21,892 WARN L230 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_a322b7a4-4eee-4e71-ad21-2829cbc8afbc/sv-benchmarks/c/combinations/Problem05_label46+token_ring.10.cil-1.c[382357,382370] [2022-11-03 04:01:21,919 WARN L230 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_a322b7a4-4eee-4e71-ad21-2829cbc8afbc/sv-benchmarks/c/combinations/Problem05_label46+token_ring.10.cil-1.c[383339,383352] [2022-11-03 04:01:22,287 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 04:01:22,299 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 04:01:23,627 WARN L230 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_a322b7a4-4eee-4e71-ad21-2829cbc8afbc/sv-benchmarks/c/combinations/Problem05_label46+token_ring.10.cil-1.c[382357,382370] [2022-11-03 04:01:23,632 WARN L230 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_a322b7a4-4eee-4e71-ad21-2829cbc8afbc/sv-benchmarks/c/combinations/Problem05_label46+token_ring.10.cil-1.c[383339,383352] [2022-11-03 04:01:23,678 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 04:01:23,739 INFO L208 MainTranslator]: Completed translation [2022-11-03 04:01:23,740 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:23 WrapperNode [2022-11-03 04:01:23,740 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 04:01:23,741 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 04:01:23,741 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 04:01:23,742 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 04:01:23,749 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:23" (1/1) ... [2022-11-03 04:01:23,851 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:23" (1/1) ... [2022-11-03 04:01:24,192 INFO L138 Inliner]: procedures = 64, calls = 72, calls flagged for inlining = 41, calls inlined = 41, statements flattened = 13088 [2022-11-03 04:01:24,193 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 04:01:24,194 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 04:01:24,194 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 04:01:24,194 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 04:01:24,204 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:23" (1/1) ... [2022-11-03 04:01:24,204 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:23" (1/1) ... [2022-11-03 04:01:24,268 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:23" (1/1) ... [2022-11-03 04:01:24,268 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:23" (1/1) ... [2022-11-03 04:01:24,521 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:23" (1/1) ... [2022-11-03 04:01:24,576 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:23" (1/1) ... [2022-11-03 04:01:24,634 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:23" (1/1) ... [2022-11-03 04:01:24,656 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:23" (1/1) ... [2022-11-03 04:01:24,863 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 04:01:24,864 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 04:01:24,864 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 04:01:24,865 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 04:01:24,876 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:23" (1/1) ... [2022-11-03 04:01:24,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 04:01:24,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a322b7a4-4eee-4e71-ad21-2829cbc8afbc/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:01:24,949 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a322b7a4-4eee-4e71-ad21-2829cbc8afbc/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 04:01:25,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a322b7a4-4eee-4e71-ad21-2829cbc8afbc/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 04:01:25,049 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 04:01:25,049 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-11-03 04:01:25,050 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-11-03 04:01:25,050 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-03 04:01:25,050 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-03 04:01:25,050 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-11-03 04:01:25,050 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-11-03 04:01:25,050 INFO L130 BoogieDeclarations]: Found specification of procedure error [2022-11-03 04:01:25,051 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2022-11-03 04:01:25,051 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-11-03 04:01:25,051 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-11-03 04:01:25,051 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-11-03 04:01:25,051 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-11-03 04:01:25,051 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-11-03 04:01:25,052 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-11-03 04:01:25,052 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 04:01:25,052 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 04:01:25,052 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 04:01:25,276 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 04:01:25,278 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 04:01:34,323 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 04:01:36,969 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 04:01:36,969 INFO L300 CfgBuilder]: Removed 14 assume(true) statements. [2022-11-03 04:01:36,974 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:01:36 BoogieIcfgContainer [2022-11-03 04:01:36,974 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 04:01:36,977 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 04:01:36,977 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 04:01:36,981 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 04:01:36,981 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:01:19" (1/3) ... [2022-11-03 04:01:36,982 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d654851 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:01:36, skipping insertion in model container [2022-11-03 04:01:36,982 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:23" (2/3) ... [2022-11-03 04:01:36,982 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d654851 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:01:36, skipping insertion in model container [2022-11-03 04:01:36,982 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:01:36" (3/3) ... [2022-11-03 04:01:36,984 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label46+token_ring.10.cil-1.c [2022-11-03 04:01:37,013 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 04:01:37,013 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-03 04:01:37,104 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 04:01:37,111 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;@fc4f268, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 04:01:37,111 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-03 04:01:37,123 INFO L276 IsEmpty]: Start isEmpty. Operand has 1815 states, 1779 states have (on average 1.9600899381675099) internal successors, (3487), 1784 states have internal predecessors, (3487), 26 states have call successors, (26), 7 states have call predecessors, (26), 7 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2022-11-03 04:01:37,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-03 04:01:37,134 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:01:37,135 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] [2022-11-03 04:01:37,136 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:01:37,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:01:37,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1514987651, now seen corresponding path program 1 times [2022-11-03 04:01:37,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:01:37,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978381085] [2022-11-03 04:01:37,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:37,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:01:37,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:37,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:01:37,667 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:01:37,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978381085] [2022-11-03 04:01:37,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978381085] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:01:37,668 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:01:37,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:01:37,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636012902] [2022-11-03 04:01:37,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:01:37,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:01:37,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:01:37,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:01:37,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:01:37,723 INFO L87 Difference]: Start difference. First operand has 1815 states, 1779 states have (on average 1.9600899381675099) internal successors, (3487), 1784 states have internal predecessors, (3487), 26 states have call successors, (26), 7 states have call predecessors, (26), 7 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-03 04:01:38,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:01:38,956 INFO L93 Difference]: Finished difference Result 3778 states and 7335 transitions. [2022-11-03 04:01:38,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 04:01:38,959 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 62 [2022-11-03 04:01:38,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:01:38,979 INFO L225 Difference]: With dead ends: 3778 [2022-11-03 04:01:38,979 INFO L226 Difference]: Without dead ends: 1962 [2022-11-03 04:01:38,992 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 [2022-11-03 04:01:38,997 INFO L413 NwaCegarLoop]: 3458 mSDtfsCounter, 3721 mSDsluCounter, 3663 mSDsCounter, 0 mSdLazyCounter, 698 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3721 SdHoareTripleChecker+Valid, 6824 SdHoareTripleChecker+Invalid, 712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:01:38,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3721 Valid, 6824 Invalid, 712 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 698 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-03 04:01:39,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1962 states. [2022-11-03 04:01:39,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1962 to 1961. [2022-11-03 04:01:39,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1961 states, 1901 states have (on average 1.9263545502367174) internal successors, (3662), 1905 states have internal predecessors, (3662), 46 states have call successors, (46), 13 states have call predecessors, (46), 12 states have return successors, (44), 43 states have call predecessors, (44), 44 states have call successors, (44) [2022-11-03 04:01:39,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1961 states to 1961 states and 3752 transitions. [2022-11-03 04:01:39,165 INFO L78 Accepts]: Start accepts. Automaton has 1961 states and 3752 transitions. Word has length 62 [2022-11-03 04:01:39,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:01:39,166 INFO L495 AbstractCegarLoop]: Abstraction has 1961 states and 3752 transitions. [2022-11-03 04:01:39,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-03 04:01:39,166 INFO L276 IsEmpty]: Start isEmpty. Operand 1961 states and 3752 transitions. [2022-11-03 04:01:39,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-03 04:01:39,181 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:01:39,181 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:01:39,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 04:01:39,182 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:01:39,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:01:39,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1825992029, now seen corresponding path program 1 times [2022-11-03 04:01:39,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:01:39,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62378545] [2022-11-03 04:01:39,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:39,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:01:39,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:39,509 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 04:01:39,510 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:01:39,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62378545] [2022-11-03 04:01:39,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62378545] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:01:39,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177584772] [2022-11-03 04:01:39,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:39,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:01:39,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a322b7a4-4eee-4e71-ad21-2829cbc8afbc/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:01:39,513 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a322b7a4-4eee-4e71-ad21-2829cbc8afbc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:01:39,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a322b7a4-4eee-4e71-ad21-2829cbc8afbc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 04:01:39,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:39,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 913 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 04:01:39,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:01:39,877 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 04:01:39,877 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:01:39,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177584772] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:01:39,878 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 04:01:39,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 04:01:39,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688952323] [2022-11-03 04:01:39,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:01:39,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 04:01:39,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:01:39,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 04:01:39,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 04:01:39,881 INFO L87 Difference]: Start difference. First operand 1961 states and 3752 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, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 04:01:40,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:01:40,455 INFO L93 Difference]: Finished difference Result 2584 states and 4719 transitions. [2022-11-03 04:01:40,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 04:01:40,457 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, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 123 [2022-11-03 04:01:40,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:01:40,471 INFO L225 Difference]: With dead ends: 2584 [2022-11-03 04:01:40,471 INFO L226 Difference]: Without dead ends: 2269 [2022-11-03 04:01:40,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 04:01:40,475 INFO L413 NwaCegarLoop]: 3323 mSDtfsCounter, 3479 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3479 SdHoareTripleChecker+Valid, 3525 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 04:01:40,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3479 Valid, 3525 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 04:01:40,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2269 states. [2022-11-03 04:01:40,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2269 to 2263. [2022-11-03 04:01:40,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2263 states, 2153 states have (on average 1.8769159312587087) internal successors, (4041), 2158 states have internal predecessors, (4041), 84 states have call successors, (84), 25 states have call predecessors, (84), 24 states have return successors, (82), 80 states have call predecessors, (82), 82 states have call successors, (82) [2022-11-03 04:01:40,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2263 states to 2263 states and 4207 transitions. [2022-11-03 04:01:40,561 INFO L78 Accepts]: Start accepts. Automaton has 2263 states and 4207 transitions. Word has length 123 [2022-11-03 04:01:40,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:01:40,561 INFO L495 AbstractCegarLoop]: Abstraction has 2263 states and 4207 transitions. [2022-11-03 04:01:40,561 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, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 04:01:40,562 INFO L276 IsEmpty]: Start isEmpty. Operand 2263 states and 4207 transitions. [2022-11-03 04:01:40,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-03 04:01:40,564 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:01:40,565 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:01:40,606 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a322b7a4-4eee-4e71-ad21-2829cbc8afbc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 04:01:40,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a322b7a4-4eee-4e71-ad21-2829cbc8afbc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-11-03 04:01:40,790 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:01:40,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:01:40,791 INFO L85 PathProgramCache]: Analyzing trace with hash -376861629, now seen corresponding path program 1 times [2022-11-03 04:01:40,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:01:40,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019537242] [2022-11-03 04:01:40,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:40,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:01:40,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:41,006 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 04:01:41,006 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:01:41,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019537242] [2022-11-03 04:01:41,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019537242] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:01:41,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490724077] [2022-11-03 04:01:41,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:41,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:01:41,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a322b7a4-4eee-4e71-ad21-2829cbc8afbc/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:01:41,011 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a322b7a4-4eee-4e71-ad21-2829cbc8afbc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:01:41,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a322b7a4-4eee-4e71-ad21-2829cbc8afbc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 04:01:41,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:41,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 907 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 04:01:41,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:01:41,325 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-03 04:01:41,325 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:01:41,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490724077] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:01:41,326 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 04:01:41,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 04:01:41,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665443368] [2022-11-03 04:01:41,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:01:41,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 04:01:41,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:01:41,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 04:01:41,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 04:01:41,329 INFO L87 Difference]: Start difference. First operand 2263 states and 4207 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 04:01:41,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:01:41,892 INFO L93 Difference]: Finished difference Result 3484 states and 6098 transitions. [2022-11-03 04:01:41,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 04:01:41,893 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 123 [2022-11-03 04:01:41,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:01:41,910 INFO L225 Difference]: With dead ends: 3484 [2022-11-03 04:01:41,910 INFO L226 Difference]: Without dead ends: 2867 [2022-11-03 04:01:41,915 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 04:01:41,917 INFO L413 NwaCegarLoop]: 3322 mSDtfsCounter, 3497 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3497 SdHoareTripleChecker+Valid, 3524 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 04:01:41,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3497 Valid, 3524 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 04:01:41,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2867 states. [2022-11-03 04:01:42,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2867 to 2859. [2022-11-03 04:01:42,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2859 states, 2651 states have (on average 1.8057336854017352) internal successors, (4787), 2658 states have internal predecessors, (4787), 158 states have call successors, (158), 49 states have call predecessors, (158), 48 states have return successors, (156), 152 states have call predecessors, (156), 156 states have call successors, (156) [2022-11-03 04:01:42,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2859 states to 2859 states and 5101 transitions. [2022-11-03 04:01:42,027 INFO L78 Accepts]: Start accepts. Automaton has 2859 states and 5101 transitions. Word has length 123 [2022-11-03 04:01:42,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:01:42,028 INFO L495 AbstractCegarLoop]: Abstraction has 2859 states and 5101 transitions. [2022-11-03 04:01:42,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 04:01:42,029 INFO L276 IsEmpty]: Start isEmpty. Operand 2859 states and 5101 transitions. [2022-11-03 04:01:42,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-03 04:01:42,033 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:01:42,033 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:01:42,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a322b7a4-4eee-4e71-ad21-2829cbc8afbc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 04:01:42,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a322b7a4-4eee-4e71-ad21-2829cbc8afbc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:01:42,259 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:01:42,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:01:42,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1236950499, now seen corresponding path program 1 times [2022-11-03 04:01:42,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:01:42,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947601204] [2022-11-03 04:01:42,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:42,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:01:42,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:42,507 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 04:01:42,507 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:01:42,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947601204] [2022-11-03 04:01:42,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947601204] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:01:42,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131635841] [2022-11-03 04:01:42,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:42,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:01:42,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a322b7a4-4eee-4e71-ad21-2829cbc8afbc/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:01:42,518 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a322b7a4-4eee-4e71-ad21-2829cbc8afbc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:01:42,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a322b7a4-4eee-4e71-ad21-2829cbc8afbc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 04:01:42,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:42,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 901 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 04:01:42,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:01:42,814 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-03 04:01:42,815 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:01:42,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131635841] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:01:42,815 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 04:01:42,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 04:01:42,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488892936] [2022-11-03 04:01:42,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:01:42,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 04:01:42,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:01:42,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 04:01:42,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 04:01:42,819 INFO L87 Difference]: Start difference. First operand 2859 states and 5101 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 04:01:43,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:01:43,393 INFO L93 Difference]: Finished difference Result 5260 states and 8806 transitions. [2022-11-03 04:01:43,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 04:01:43,394 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 123 [2022-11-03 04:01:43,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:01:43,414 INFO L225 Difference]: With dead ends: 5260 [2022-11-03 04:01:43,414 INFO L226 Difference]: Without dead ends: 4047 [2022-11-03 04:01:43,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 04:01:43,422 INFO L413 NwaCegarLoop]: 3285 mSDtfsCounter, 3491 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3491 SdHoareTripleChecker+Valid, 3487 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 04:01:43,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3491 Valid, 3487 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 04:01:43,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4047 states. [2022-11-03 04:01:43,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4047 to 4035. [2022-11-03 04:01:43,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4035 states, 3635 states have (on average 1.7207702888583218) internal successors, (6255), 3646 states have internal predecessors, (6255), 302 states have call successors, (302), 97 states have call predecessors, (302), 96 states have return successors, (300), 292 states have call predecessors, (300), 300 states have call successors, (300) [2022-11-03 04:01:43,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4035 states to 4035 states and 6857 transitions. [2022-11-03 04:01:43,611 INFO L78 Accepts]: Start accepts. Automaton has 4035 states and 6857 transitions. Word has length 123 [2022-11-03 04:01:43,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:01:43,612 INFO L495 AbstractCegarLoop]: Abstraction has 4035 states and 6857 transitions. [2022-11-03 04:01:43,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 04:01:43,612 INFO L276 IsEmpty]: Start isEmpty. Operand 4035 states and 6857 transitions. [2022-11-03 04:01:43,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-03 04:01:43,619 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:01:43,620 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:01:43,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a322b7a4-4eee-4e71-ad21-2829cbc8afbc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 04:01:43,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a322b7a4-4eee-4e71-ad21-2829cbc8afbc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:01:43,835 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:01:43,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:01:43,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1932466301, now seen corresponding path program 1 times [2022-11-03 04:01:43,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:01:43,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385316562] [2022-11-03 04:01:43,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:43,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:01:43,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:44,008 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 04:01:44,008 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:01:44,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385316562] [2022-11-03 04:01:44,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385316562] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:01:44,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969792689] [2022-11-03 04:01:44,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:44,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:01:44,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a322b7a4-4eee-4e71-ad21-2829cbc8afbc/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:01:44,010 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a322b7a4-4eee-4e71-ad21-2829cbc8afbc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:01:44,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a322b7a4-4eee-4e71-ad21-2829cbc8afbc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 04:01:44,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:44,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 895 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 04:01:44,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:01:44,288 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-03 04:01:44,288 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:01:44,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969792689] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:01:44,288 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 04:01:44,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 04:01:44,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475082824] [2022-11-03 04:01:44,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:01:44,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 04:01:44,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:01:44,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 04:01:44,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 04:01:44,290 INFO L87 Difference]: Start difference. First operand 4035 states and 6857 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 04:01:45,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:01:45,111 INFO L93 Difference]: Finished difference Result 8764 states and 14122 transitions. [2022-11-03 04:01:45,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 04:01:45,112 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 123 [2022-11-03 04:01:45,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:01:45,144 INFO L225 Difference]: With dead ends: 8764 [2022-11-03 04:01:45,144 INFO L226 Difference]: Without dead ends: 6375 [2022-11-03 04:01:45,154 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 04:01:45,155 INFO L413 NwaCegarLoop]: 3285 mSDtfsCounter, 3500 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3500 SdHoareTripleChecker+Valid, 3487 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 04:01:45,156 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3500 Valid, 3487 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 04:01:45,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6375 states. [2022-11-03 04:01:45,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6375 to 6355. [2022-11-03 04:01:45,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6355 states, 5579 states have (on average 1.6388241620362072) internal successors, (9143), 5598 states have internal predecessors, (9143), 582 states have call successors, (582), 193 states have call predecessors, (582), 192 states have return successors, (580), 564 states have call predecessors, (580), 580 states have call successors, (580) [2022-11-03 04:01:45,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6355 states to 6355 states and 10305 transitions. [2022-11-03 04:01:45,505 INFO L78 Accepts]: Start accepts. Automaton has 6355 states and 10305 transitions. Word has length 123 [2022-11-03 04:01:45,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:01:45,505 INFO L495 AbstractCegarLoop]: Abstraction has 6355 states and 10305 transitions. [2022-11-03 04:01:45,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 04:01:45,506 INFO L276 IsEmpty]: Start isEmpty. Operand 6355 states and 10305 transitions. [2022-11-03 04:01:45,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-03 04:01:45,519 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:01:45,519 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:01:45,560 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a322b7a4-4eee-4e71-ad21-2829cbc8afbc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-03 04:01:45,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a322b7a4-4eee-4e71-ad21-2829cbc8afbc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:01:45,739 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:01:45,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:01:45,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1575694819, now seen corresponding path program 1 times [2022-11-03 04:01:45,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:01:45,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398654602] [2022-11-03 04:01:45,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:45,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:01:45,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:45,894 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 04:01:45,895 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:01:45,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398654602] [2022-11-03 04:01:45,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398654602] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:01:45,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403864031] [2022-11-03 04:01:45,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:45,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:01:45,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a322b7a4-4eee-4e71-ad21-2829cbc8afbc/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:01:45,897 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a322b7a4-4eee-4e71-ad21-2829cbc8afbc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:01:45,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a322b7a4-4eee-4e71-ad21-2829cbc8afbc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 04:01:46,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:46,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 889 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 04:01:46,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:01:46,184 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 04:01:46,185 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:01:46,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403864031] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:01:46,185 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 04:01:46,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 04:01:46,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528716755] [2022-11-03 04:01:46,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:01:46,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 04:01:46,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:01:46,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 04:01:46,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 04:01:46,187 INFO L87 Difference]: Start difference. First operand 6355 states and 10305 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, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 04:01:46,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:01:46,979 INFO L93 Difference]: Finished difference Result 15676 states and 24554 transitions. [2022-11-03 04:01:46,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 04:01:46,980 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, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 123 [2022-11-03 04:01:46,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:01:47,053 INFO L225 Difference]: With dead ends: 15676 [2022-11-03 04:01:47,055 INFO L226 Difference]: Without dead ends: 10967 [2022-11-03 04:01:47,078 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 04:01:47,079 INFO L413 NwaCegarLoop]: 3285 mSDtfsCounter, 3485 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3485 SdHoareTripleChecker+Valid, 3487 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 04:01:47,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3485 Valid, 3487 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 04:01:47,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10967 states. [2022-11-03 04:01:47,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10967 to 10931. [2022-11-03 04:01:47,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10931 states, 9419 states have (on average 1.5737339420320628) internal successors, (14823), 9454 states have internal predecessors, (14823), 1126 states have call successors, (1126), 385 states have call predecessors, (1126), 384 states have return successors, (1124), 1092 states have call predecessors, (1124), 1124 states have call successors, (1124) [2022-11-03 04:01:47,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10931 states to 10931 states and 17073 transitions. [2022-11-03 04:01:47,584 INFO L78 Accepts]: Start accepts. Automaton has 10931 states and 17073 transitions. Word has length 123 [2022-11-03 04:01:47,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:01:47,585 INFO L495 AbstractCegarLoop]: Abstraction has 10931 states and 17073 transitions. [2022-11-03 04:01:47,585 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, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 04:01:47,585 INFO L276 IsEmpty]: Start isEmpty. Operand 10931 states and 17073 transitions. [2022-11-03 04:01:47,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-03 04:01:47,604 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:01:47,604 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:01:47,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a322b7a4-4eee-4e71-ad21-2829cbc8afbc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 04:01:47,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a322b7a4-4eee-4e71-ad21-2829cbc8afbc/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:01:47,820 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:01:47,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:01:47,820 INFO L85 PathProgramCache]: Analyzing trace with hash 814838659, now seen corresponding path program 1 times [2022-11-03 04:01:47,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:01:47,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355992780] [2022-11-03 04:01:47,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:47,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:01:47,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:48,609 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-03 04:01:48,609 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:01:48,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355992780] [2022-11-03 04:01:48,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355992780] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:01:48,609 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:01:48,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 04:01:48,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044718967] [2022-11-03 04:01:48,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:01:48,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 04:01:48,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:01:48,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 04:01:48,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 04:01:48,612 INFO L87 Difference]: Start difference. First operand 10931 states and 17073 transitions. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-03 04:01:50,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:01:50,410 INFO L93 Difference]: Finished difference Result 25179 states and 38535 transitions. [2022-11-03 04:01:50,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 04:01:50,419 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 123 [2022-11-03 04:01:50,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:01:50,500 INFO L225 Difference]: With dead ends: 25179 [2022-11-03 04:01:50,501 INFO L226 Difference]: Without dead ends: 15895 [2022-11-03 04:01:50,534 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 [2022-11-03 04:01:50,536 INFO L413 NwaCegarLoop]: 3291 mSDtfsCounter, 3959 mSDsluCounter, 10415 mSDsCounter, 0 mSdLazyCounter, 1199 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3965 SdHoareTripleChecker+Valid, 12965 SdHoareTripleChecker+Invalid, 1337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 1199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:01:50,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3965 Valid, 12965 Invalid, 1337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 1199 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-03 04:01:50,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15895 states. [2022-11-03 04:01:51,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15895 to 15443. [2022-11-03 04:01:51,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15443 states, 13195 states have (on average 1.544145509662751) internal successors, (20375), 13246 states have internal predecessors, (20375), 1670 states have call successors, (1670), 577 states have call predecessors, (1670), 576 states have return successors, (1668), 1620 states have call predecessors, (1668), 1668 states have call successors, (1668) [2022-11-03 04:01:51,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15443 states to 15443 states and 23713 transitions. [2022-11-03 04:01:51,830 INFO L78 Accepts]: Start accepts. Automaton has 15443 states and 23713 transitions. Word has length 123 [2022-11-03 04:01:51,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:01:51,831 INFO L495 AbstractCegarLoop]: Abstraction has 15443 states and 23713 transitions. [2022-11-03 04:01:51,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-03 04:01:51,832 INFO L276 IsEmpty]: Start isEmpty. Operand 15443 states and 23713 transitions. [2022-11-03 04:01:51,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 04:01:51,861 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:01:51,861 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:01:51,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-03 04:01:51,861 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:01:51,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:01:51,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1604270250, now seen corresponding path program 1 times [2022-11-03 04:01:51,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:01:51,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454368748] [2022-11-03 04:01:51,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:51,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:01:51,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:52,680 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-03 04:01:52,682 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:01:52,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454368748] [2022-11-03 04:01:52,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454368748] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:01:52,682 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:01:52,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 04:01:52,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814664046] [2022-11-03 04:01:52,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:01:52,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 04:01:52,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:01:52,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 04:01:52,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 04:01:52,684 INFO L87 Difference]: Start difference. First operand 15443 states and 23713 transitions. Second operand has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-03 04:01:55,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:01:55,700 INFO L93 Difference]: Finished difference Result 49499 states and 74312 transitions. [2022-11-03 04:01:55,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 04:01:55,701 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 124 [2022-11-03 04:01:55,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:01:55,865 INFO L225 Difference]: With dead ends: 49499 [2022-11-03 04:01:55,866 INFO L226 Difference]: Without dead ends: 35703 [2022-11-03 04:01:55,912 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-03 04:01:55,912 INFO L413 NwaCegarLoop]: 3297 mSDtfsCounter, 4177 mSDsluCounter, 10445 mSDsCounter, 0 mSdLazyCounter, 1205 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4196 SdHoareTripleChecker+Valid, 12993 SdHoareTripleChecker+Invalid, 1343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 1205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:01:55,913 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4196 Valid, 12993 Invalid, 1343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 1205 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-03 04:01:55,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35703 states. [2022-11-03 04:01:58,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35703 to 28659. [2022-11-03 04:01:58,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28659 states, 24267 states have (on average 1.5088391642971937) internal successors, (36615), 24366 states have internal predecessors, (36615), 3238 states have call successors, (3238), 1153 states have call predecessors, (3238), 1152 states have return successors, (3236), 3140 states have call predecessors, (3236), 3236 states have call successors, (3236) [2022-11-03 04:01:58,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28659 states to 28659 states and 43089 transitions. [2022-11-03 04:01:58,576 INFO L78 Accepts]: Start accepts. Automaton has 28659 states and 43089 transitions. Word has length 124 [2022-11-03 04:01:58,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:01:58,578 INFO L495 AbstractCegarLoop]: Abstraction has 28659 states and 43089 transitions. [2022-11-03 04:01:58,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-03 04:01:58,578 INFO L276 IsEmpty]: Start isEmpty. Operand 28659 states and 43089 transitions. [2022-11-03 04:01:58,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-03 04:01:58,750 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:01:58,751 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:01:58,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-03 04:01:58,751 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:01:58,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:01:58,752 INFO L85 PathProgramCache]: Analyzing trace with hash 994727523, now seen corresponding path program 1 times [2022-11-03 04:01:58,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:01:58,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006369470] [2022-11-03 04:01:58,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:58,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:01:58,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:59,280 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-03 04:01:59,280 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:01:59,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006369470] [2022-11-03 04:01:59,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006369470] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:01:59,281 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:01:59,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 04:01:59,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779179799] [2022-11-03 04:01:59,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:01:59,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 04:01:59,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:01:59,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 04:01:59,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 04:01:59,283 INFO L87 Difference]: Start difference. First operand 28659 states and 43089 transitions. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-03 04:02:03,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:03,053 INFO L93 Difference]: Finished difference Result 74491 states and 111191 transitions. [2022-11-03 04:02:03,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 04:02:03,054 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 125 [2022-11-03 04:02:03,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:03,266 INFO L225 Difference]: With dead ends: 74491 [2022-11-03 04:02:03,266 INFO L226 Difference]: Without dead ends: 47479 [2022-11-03 04:02:03,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-03 04:02:03,341 INFO L413 NwaCegarLoop]: 3280 mSDtfsCounter, 4062 mSDsluCounter, 10507 mSDsCounter, 0 mSdLazyCounter, 1202 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4068 SdHoareTripleChecker+Valid, 13034 SdHoareTripleChecker+Invalid, 1352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 1202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:03,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4068 Valid, 13034 Invalid, 1352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 1202 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-03 04:02:03,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47479 states. [2022-11-03 04:02:06,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47479 to 41779. [2022-11-03 04:02:06,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41779 states, 35243 states have (on average 1.492920579973328) internal successors, (52615), 35390 states have internal predecessors, (52615), 4806 states have call successors, (4806), 1729 states have call predecessors, (4806), 1728 states have return successors, (4804), 4660 states have call predecessors, (4804), 4804 states have call successors, (4804) [2022-11-03 04:02:06,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41779 states to 41779 states and 62225 transitions. [2022-11-03 04:02:06,436 INFO L78 Accepts]: Start accepts. Automaton has 41779 states and 62225 transitions. Word has length 125 [2022-11-03 04:02:06,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:06,437 INFO L495 AbstractCegarLoop]: Abstraction has 41779 states and 62225 transitions. [2022-11-03 04:02:06,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-03 04:02:06,437 INFO L276 IsEmpty]: Start isEmpty. Operand 41779 states and 62225 transitions. [2022-11-03 04:02:06,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-11-03 04:02:06,496 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:06,496 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:02:06,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-03 04:02:06,496 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:06,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:06,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1437184074, now seen corresponding path program 1 times [2022-11-03 04:02:06,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:02:06,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911231031] [2022-11-03 04:02:06,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:06,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:02:06,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:07,202 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-03 04:02:07,202 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:02:07,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911231031] [2022-11-03 04:02:07,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911231031] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:07,203 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:02:07,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 04:02:07,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516331762] [2022-11-03 04:02:07,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:07,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 04:02:07,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:02:07,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 04:02:07,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 04:02:07,205 INFO L87 Difference]: Start difference. First operand 41779 states and 62225 transitions. Second operand has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-03 04:02:13,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:13,756 INFO L93 Difference]: Finished difference Result 135099 states and 200472 transitions. [2022-11-03 04:02:13,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 04:02:13,757 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 126 [2022-11-03 04:02:13,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:14,126 INFO L225 Difference]: With dead ends: 135099 [2022-11-03 04:02:14,126 INFO L226 Difference]: Without dead ends: 94967 [2022-11-03 04:02:14,234 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-03 04:02:14,235 INFO L413 NwaCegarLoop]: 3272 mSDtfsCounter, 4146 mSDsluCounter, 6987 mSDsCounter, 0 mSdLazyCounter, 896 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4165 SdHoareTripleChecker+Valid, 9759 SdHoareTripleChecker+Invalid, 1050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 896 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:14,236 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4165 Valid, 9759 Invalid, 1050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 896 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-03 04:02:14,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94967 states. [2022-11-03 04:02:19,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94967 to 80179. [2022-11-03 04:02:19,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80179 states, 67403 states have (on average 1.4742222156283844) internal successors, (99367), 67694 states have internal predecessors, (99367), 9318 states have call successors, (9318), 3457 states have call predecessors, (9318), 3456 states have return successors, (9316), 9028 states have call predecessors, (9316), 9316 states have call successors, (9316) [2022-11-03 04:02:20,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80179 states to 80179 states and 118001 transitions. [2022-11-03 04:02:20,381 INFO L78 Accepts]: Start accepts. Automaton has 80179 states and 118001 transitions. Word has length 126 [2022-11-03 04:02:20,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:20,381 INFO L495 AbstractCegarLoop]: Abstraction has 80179 states and 118001 transitions. [2022-11-03 04:02:20,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-03 04:02:20,382 INFO L276 IsEmpty]: Start isEmpty. Operand 80179 states and 118001 transitions.