./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label43+token_ring.04.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/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_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label43+token_ring.04.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/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_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/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 2c5568751dd37ae3ac79e02a0fd7273b3ab2af9e94f13bec2f84e6a22bfe26f6 --- 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 03:47:07,481 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 03:47:07,483 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 03:47:07,529 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 03:47:07,529 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 03:47:07,533 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 03:47:07,536 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 03:47:07,539 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 03:47:07,543 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 03:47:07,551 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 03:47:07,552 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 03:47:07,555 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 03:47:07,555 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 03:47:07,557 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 03:47:07,559 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 03:47:07,561 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 03:47:07,562 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 03:47:07,563 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 03:47:07,565 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 03:47:07,572 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 03:47:07,574 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 03:47:07,575 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 03:47:07,578 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 03:47:07,579 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 03:47:07,587 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 03:47:07,588 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 03:47:07,588 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 03:47:07,590 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 03:47:07,590 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 03:47:07,591 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 03:47:07,592 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 03:47:07,594 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 03:47:07,596 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 03:47:07,597 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 03:47:07,598 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 03:47:07,598 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 03:47:07,599 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 03:47:07,599 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 03:47:07,600 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 03:47:07,600 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 03:47:07,601 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 03:47:07,602 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 03:47:07,649 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 03:47:07,649 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 03:47:07,650 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 03:47:07,650 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 03:47:07,651 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 03:47:07,651 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 03:47:07,651 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 03:47:07,651 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 03:47:07,651 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 03:47:07,652 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 03:47:07,653 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 03:47:07,653 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 03:47:07,653 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 03:47:07,653 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 03:47:07,653 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 03:47:07,654 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 03:47:07,654 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 03:47:07,654 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 03:47:07,655 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 03:47:07,655 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 03:47:07,655 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 03:47:07,655 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 03:47:07,655 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 03:47:07,657 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 03:47:07,657 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 03:47:07,657 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 03:47:07,657 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 03:47:07,658 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 03:47:07,658 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 03:47:07,658 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 03:47:07,658 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 03:47:07,658 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 03:47:07,659 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:47:07,659 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 03:47:07,659 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 03:47:07,659 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 03:47:07,659 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 03:47:07,659 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 03:47:07,660 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 03:47:07,660 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 03:47:07,660 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 03:47:07,660 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_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2c5568751dd37ae3ac79e02a0fd7273b3ab2af9e94f13bec2f84e6a22bfe26f6 [2022-11-03 03:47:08,000 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 03:47:08,028 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 03:47:08,031 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 03:47:08,032 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 03:47:08,033 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 03:47:08,034 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/combinations/Problem05_label43+token_ring.04.cil-2.c [2022-11-03 03:47:08,118 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/bin/utaipan-7li7fVZpFI/data/bbb49f5de/61140f686547400e954259e115d7ccd1/FLAG8a91d3159 [2022-11-03 03:47:09,319 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 03:47:09,320 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/sv-benchmarks/c/combinations/Problem05_label43+token_ring.04.cil-2.c [2022-11-03 03:47:09,367 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/bin/utaipan-7li7fVZpFI/data/bbb49f5de/61140f686547400e954259e115d7ccd1/FLAG8a91d3159 [2022-11-03 03:47:09,521 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/bin/utaipan-7li7fVZpFI/data/bbb49f5de/61140f686547400e954259e115d7ccd1 [2022-11-03 03:47:09,523 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 03:47:09,526 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 03:47:09,529 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 03:47:09,530 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 03:47:09,533 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 03:47:09,534 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:47:09" (1/1) ... [2022-11-03 03:47:09,535 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46e5cfd2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:09, skipping insertion in model container [2022-11-03 03:47:09,536 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:47:09" (1/1) ... [2022-11-03 03:47:09,543 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 03:47:09,781 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:47:12,279 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_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/sv-benchmarks/c/combinations/Problem05_label43+token_ring.04.cil-2.c[381679,381692] [2022-11-03 03:47:12,305 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_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/sv-benchmarks/c/combinations/Problem05_label43+token_ring.04.cil-2.c[383339,383352] [2022-11-03 03:47:12,521 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:47:12,533 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 03:47:13,743 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_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/sv-benchmarks/c/combinations/Problem05_label43+token_ring.04.cil-2.c[381679,381692] [2022-11-03 03:47:13,748 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_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/sv-benchmarks/c/combinations/Problem05_label43+token_ring.04.cil-2.c[383339,383352] [2022-11-03 03:47:13,762 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:47:13,832 INFO L208 MainTranslator]: Completed translation [2022-11-03 03:47:13,833 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:13 WrapperNode [2022-11-03 03:47:13,833 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 03:47:13,835 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 03:47:13,835 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 03:47:13,835 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 03:47:13,843 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:13" (1/1) ... [2022-11-03 03:47:13,980 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:13" (1/1) ... [2022-11-03 03:47:14,458 INFO L138 Inliner]: procedures = 52, calls = 54, calls flagged for inlining = 29, calls inlined = 29, statements flattened = 12740 [2022-11-03 03:47:14,459 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 03:47:14,460 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 03:47:14,461 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 03:47:14,461 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 03:47:14,479 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:13" (1/1) ... [2022-11-03 03:47:14,488 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:13" (1/1) ... [2022-11-03 03:47:14,550 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:13" (1/1) ... [2022-11-03 03:47:14,562 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:13" (1/1) ... [2022-11-03 03:47:14,891 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:13" (1/1) ... [2022-11-03 03:47:14,957 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:13" (1/1) ... [2022-11-03 03:47:14,994 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:13" (1/1) ... [2022-11-03 03:47:15,023 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:13" (1/1) ... [2022-11-03 03:47:15,097 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 03:47:15,098 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 03:47:15,099 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 03:47:15,099 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 03:47:15,103 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:13" (1/1) ... [2022-11-03 03:47:15,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:47:15,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:47:15,168 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 03:47:15,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 03:47:15,312 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 03:47:15,313 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-11-03 03:47:15,313 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-11-03 03:47:15,313 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-03 03:47:15,313 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-03 03:47:15,314 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-11-03 03:47:15,314 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-11-03 03:47:15,314 INFO L130 BoogieDeclarations]: Found specification of procedure error [2022-11-03 03:47:15,314 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2022-11-03 03:47:15,314 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-11-03 03:47:15,314 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-11-03 03:47:15,315 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-11-03 03:47:15,315 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-11-03 03:47:15,315 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-11-03 03:47:15,315 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-11-03 03:47:15,315 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 03:47:15,315 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 03:47:15,315 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 03:47:15,534 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 03:47:15,536 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 03:47:24,637 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 03:47:26,650 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 03:47:26,651 INFO L300 CfgBuilder]: Removed 8 assume(true) statements. [2022-11-03 03:47:26,658 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:47:26 BoogieIcfgContainer [2022-11-03 03:47:26,659 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 03:47:26,662 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 03:47:26,663 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 03:47:26,667 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 03:47:26,668 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:47:09" (1/3) ... [2022-11-03 03:47:26,669 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b7e4c69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:47:26, skipping insertion in model container [2022-11-03 03:47:26,669 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:47:13" (2/3) ... [2022-11-03 03:47:26,670 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b7e4c69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:47:26, skipping insertion in model container [2022-11-03 03:47:26,670 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:47:26" (3/3) ... [2022-11-03 03:47:26,672 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label43+token_ring.04.cil-2.c [2022-11-03 03:47:26,697 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 03:47:26,697 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-03 03:47:26,812 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 03:47:26,820 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;@265574d0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 03:47:26,821 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-03 03:47:26,833 INFO L276 IsEmpty]: Start isEmpty. Operand has 1749 states, 1719 states have (on average 1.9726585223967423) internal successors, (3391), 1724 states have internal predecessors, (3391), 20 states have call successors, (20), 7 states have call predecessors, (20), 7 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2022-11-03 03:47:26,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-03 03:47:26,847 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:26,848 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] [2022-11-03 03:47:26,849 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:26,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:26,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1279235955, now seen corresponding path program 1 times [2022-11-03 03:47:26,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:47:26,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557583631] [2022-11-03 03:47:26,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:26,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:47:27,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:27,383 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 03:47:27,384 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:47:27,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557583631] [2022-11-03 03:47:27,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557583631] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:47:27,385 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:47:27,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:47:27,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68509917] [2022-11-03 03:47:27,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:47:27,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:47:27,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:47:27,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:47:27,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:47:27,445 INFO L87 Difference]: Start difference. First operand has 1749 states, 1719 states have (on average 1.9726585223967423) internal successors, (3391), 1724 states have internal predecessors, (3391), 20 states have call successors, (20), 7 states have call predecessors, (20), 7 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 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 03:47:28,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:47:28,479 INFO L93 Difference]: Finished difference Result 3580 states and 6999 transitions. [2022-11-03 03:47:28,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:47:28,482 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 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 44 [2022-11-03 03:47:28,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:47:28,503 INFO L225 Difference]: With dead ends: 3580 [2022-11-03 03:47:28,503 INFO L226 Difference]: Without dead ends: 1830 [2022-11-03 03:47:28,510 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 03:47:28,513 INFO L413 NwaCegarLoop]: 3278 mSDtfsCounter, 3523 mSDsluCounter, 3471 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3523 SdHoareTripleChecker+Valid, 6488 SdHoareTripleChecker+Invalid, 616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 03:47:28,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3523 Valid, 6488 Invalid, 616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 602 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 03:47:28,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1830 states. [2022-11-03 03:47:28,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1830 to 1829. [2022-11-03 03:47:28,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1829 states, 1781 states have (on average 1.948343627175744) internal successors, (3470), 1785 states have internal predecessors, (3470), 34 states have call successors, (34), 13 states have call predecessors, (34), 12 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2022-11-03 03:47:28,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1829 states to 1829 states and 3536 transitions. [2022-11-03 03:47:28,677 INFO L78 Accepts]: Start accepts. Automaton has 1829 states and 3536 transitions. Word has length 44 [2022-11-03 03:47:28,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:47:28,678 INFO L495 AbstractCegarLoop]: Abstraction has 1829 states and 3536 transitions. [2022-11-03 03:47:28,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 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 03:47:28,679 INFO L276 IsEmpty]: Start isEmpty. Operand 1829 states and 3536 transitions. [2022-11-03 03:47:28,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-03 03:47:28,683 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:28,684 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:47:28,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 03:47:28,684 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:28,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:28,685 INFO L85 PathProgramCache]: Analyzing trace with hash -455841056, now seen corresponding path program 1 times [2022-11-03 03:47:28,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:47:28,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359666513] [2022-11-03 03:47:28,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:28,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:47:28,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:28,940 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 03:47:28,940 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:47:28,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359666513] [2022-11-03 03:47:28,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359666513] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:47:28,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150315959] [2022-11-03 03:47:28,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:28,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:47:28,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:47:28,945 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:47:28,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 03:47:29,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:29,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 03:47:29,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:47:29,201 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 03:47:29,202 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:47:29,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150315959] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:47:29,214 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:47:29,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 03:47:29,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417981735] [2022-11-03 03:47:29,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:47:29,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:47:29,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:47:29,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:47:29,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:47:29,217 INFO L87 Difference]: Start difference. First operand 1829 states and 3536 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 2 states have internal predecessors, (53), 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 03:47:29,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:47:29,811 INFO L93 Difference]: Finished difference Result 2188 states and 4059 transitions. [2022-11-03 03:47:29,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:47:29,812 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 2 states have internal predecessors, (53), 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 81 [2022-11-03 03:47:29,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:47:29,828 INFO L225 Difference]: With dead ends: 2188 [2022-11-03 03:47:29,829 INFO L226 Difference]: Without dead ends: 2005 [2022-11-03 03:47:29,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 81 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 03:47:29,832 INFO L413 NwaCegarLoop]: 3221 mSDtfsCounter, 3389 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3389 SdHoareTripleChecker+Valid, 3333 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:47:29,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3389 Valid, 3333 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 03:47:29,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2005 states. [2022-11-03 03:47:29,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2005 to 1999. [2022-11-03 03:47:29,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1999 states, 1913 states have (on average 1.9116570831155253) internal successors, (3657), 1918 states have internal predecessors, (3657), 60 states have call successors, (60), 25 states have call predecessors, (60), 24 states have return successors, (58), 56 states have call predecessors, (58), 58 states have call successors, (58) [2022-11-03 03:47:29,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1999 states to 1999 states and 3775 transitions. [2022-11-03 03:47:29,931 INFO L78 Accepts]: Start accepts. Automaton has 1999 states and 3775 transitions. Word has length 81 [2022-11-03 03:47:29,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:47:29,932 INFO L495 AbstractCegarLoop]: Abstraction has 1999 states and 3775 transitions. [2022-11-03 03:47:29,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 2 states have internal predecessors, (53), 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 03:47:29,932 INFO L276 IsEmpty]: Start isEmpty. Operand 1999 states and 3775 transitions. [2022-11-03 03:47:29,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-03 03:47:29,944 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:29,945 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:47:29,982 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 03:47:30,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:47:30,159 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:30,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:30,160 INFO L85 PathProgramCache]: Analyzing trace with hash 264252096, now seen corresponding path program 1 times [2022-11-03 03:47:30,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:47:30,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369974592] [2022-11-03 03:47:30,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:30,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:47:30,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:30,396 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 03:47:30,396 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:47:30,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369974592] [2022-11-03 03:47:30,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369974592] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:47:30,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929318529] [2022-11-03 03:47:30,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:30,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:47:30,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:47:30,399 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:47:30,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 03:47:30,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:30,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 03:47:30,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:47:30,657 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:47:30,660 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:47:30,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929318529] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:47:30,661 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:47:30,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 03:47:30,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743872704] [2022-11-03 03:47:30,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:47:30,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:47:30,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:47:30,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:47:30,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:47:30,665 INFO L87 Difference]: Start difference. First operand 1999 states and 3775 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 2 states have internal predecessors, (50), 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 03:47:31,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:47:31,225 INFO L93 Difference]: Finished difference Result 2692 states and 4778 transitions. [2022-11-03 03:47:31,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:47:31,227 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 2 states have internal predecessors, (50), 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 81 [2022-11-03 03:47:31,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:47:31,242 INFO L225 Difference]: With dead ends: 2692 [2022-11-03 03:47:31,243 INFO L226 Difference]: Without dead ends: 2339 [2022-11-03 03:47:31,245 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 81 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 03:47:31,249 INFO L413 NwaCegarLoop]: 3220 mSDtfsCounter, 3392 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3392 SdHoareTripleChecker+Valid, 3332 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:47:31,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3392 Valid, 3332 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 03:47:31,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2339 states. [2022-11-03 03:47:31,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2339 to 2331. [2022-11-03 03:47:31,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2331 states, 2171 states have (on average 1.8512206356517733) internal successors, (4019), 2178 states have internal predecessors, (4019), 110 states have call successors, (110), 49 states have call predecessors, (110), 48 states have return successors, (108), 104 states have call predecessors, (108), 108 states have call successors, (108) [2022-11-03 03:47:31,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2331 states to 2331 states and 4237 transitions. [2022-11-03 03:47:31,365 INFO L78 Accepts]: Start accepts. Automaton has 2331 states and 4237 transitions. Word has length 81 [2022-11-03 03:47:31,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:47:31,365 INFO L495 AbstractCegarLoop]: Abstraction has 2331 states and 4237 transitions. [2022-11-03 03:47:31,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 2 states have internal predecessors, (50), 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 03:47:31,366 INFO L276 IsEmpty]: Start isEmpty. Operand 2331 states and 4237 transitions. [2022-11-03 03:47:31,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-03 03:47:31,369 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:31,370 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:47:31,416 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 03:47:31,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:47:31,587 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:31,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:31,587 INFO L85 PathProgramCache]: Analyzing trace with hash -802300192, now seen corresponding path program 1 times [2022-11-03 03:47:31,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:47:31,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649716038] [2022-11-03 03:47:31,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:31,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:47:31,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:31,715 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 03:47:31,715 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:47:31,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649716038] [2022-11-03 03:47:31,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649716038] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:47:31,716 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:47:31,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:47:31,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748588020] [2022-11-03 03:47:31,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:47:31,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:47:31,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:47:31,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:47:31,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:47:31,719 INFO L87 Difference]: Start difference. First operand 2331 states and 4237 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-03 03:47:32,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:47:32,391 INFO L93 Difference]: Finished difference Result 2867 states and 5012 transitions. [2022-11-03 03:47:32,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:47:32,391 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 81 [2022-11-03 03:47:32,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:47:32,405 INFO L225 Difference]: With dead ends: 2867 [2022-11-03 03:47:32,405 INFO L226 Difference]: Without dead ends: 2507 [2022-11-03 03:47:32,408 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:47:32,409 INFO L413 NwaCegarLoop]: 3235 mSDtfsCounter, 55 mSDsluCounter, 3414 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 6416 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:47:32,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 6416 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 03:47:32,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2507 states. [2022-11-03 03:47:32,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2507 to 2435. [2022-11-03 03:47:32,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2435 states, 2267 states have (on average 1.843405381561535) internal successors, (4179), 2274 states have internal predecessors, (4179), 114 states have call successors, (114), 53 states have call predecessors, (114), 52 states have return successors, (112), 108 states have call predecessors, (112), 112 states have call successors, (112) [2022-11-03 03:47:32,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2435 states to 2435 states and 4405 transitions. [2022-11-03 03:47:32,517 INFO L78 Accepts]: Start accepts. Automaton has 2435 states and 4405 transitions. Word has length 81 [2022-11-03 03:47:32,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:47:32,518 INFO L495 AbstractCegarLoop]: Abstraction has 2435 states and 4405 transitions. [2022-11-03 03:47:32,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-03 03:47:32,519 INFO L276 IsEmpty]: Start isEmpty. Operand 2435 states and 4405 transitions. [2022-11-03 03:47:32,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-11-03 03:47:32,523 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:32,524 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:47:32,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 03:47:32,524 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:32,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:32,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1733614274, now seen corresponding path program 1 times [2022-11-03 03:47:32,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:47:32,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627183057] [2022-11-03 03:47:32,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:32,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:47:32,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:32,633 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-11-03 03:47:32,634 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:47:32,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627183057] [2022-11-03 03:47:32,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627183057] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:47:32,635 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:47:32,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:47:32,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449310818] [2022-11-03 03:47:32,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:47:32,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:47:32,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:47:32,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:47:32,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:47:32,637 INFO L87 Difference]: Start difference. First operand 2435 states and 4405 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 03:47:33,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:47:33,236 INFO L93 Difference]: Finished difference Result 3976 states and 6646 transitions. [2022-11-03 03:47:33,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:47:33,237 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 107 [2022-11-03 03:47:33,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:47:33,253 INFO L225 Difference]: With dead ends: 3976 [2022-11-03 03:47:33,253 INFO L226 Difference]: Without dead ends: 3187 [2022-11-03 03:47:33,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:47:33,259 INFO L413 NwaCegarLoop]: 3203 mSDtfsCounter, 3383 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3383 SdHoareTripleChecker+Valid, 3315 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:47:33,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3383 Valid, 3315 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 03:47:33,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3187 states. [2022-11-03 03:47:33,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3187 to 3171. [2022-11-03 03:47:33,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3171 states, 2851 states have (on average 1.7562258856541564) internal successors, (5007), 2862 states have internal predecessors, (5007), 214 states have call successors, (214), 105 states have call predecessors, (214), 104 states have return successors, (212), 204 states have call predecessors, (212), 212 states have call successors, (212) [2022-11-03 03:47:33,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3171 states to 3171 states and 5433 transitions. [2022-11-03 03:47:33,525 INFO L78 Accepts]: Start accepts. Automaton has 3171 states and 5433 transitions. Word has length 107 [2022-11-03 03:47:33,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:47:33,526 INFO L495 AbstractCegarLoop]: Abstraction has 3171 states and 5433 transitions. [2022-11-03 03:47:33,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 03:47:33,527 INFO L276 IsEmpty]: Start isEmpty. Operand 3171 states and 5433 transitions. [2022-11-03 03:47:33,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-11-03 03:47:33,532 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:33,532 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:47:33,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 03:47:33,533 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:33,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:33,533 INFO L85 PathProgramCache]: Analyzing trace with hash -372562735, now seen corresponding path program 1 times [2022-11-03 03:47:33,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:47:33,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242461387] [2022-11-03 03:47:33,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:33,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:47:33,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:33,613 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-11-03 03:47:33,613 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:47:33,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242461387] [2022-11-03 03:47:33,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242461387] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:47:33,614 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:47:33,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:47:33,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314280833] [2022-11-03 03:47:33,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:47:33,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:47:33,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:47:33,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:47:33,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:47:33,616 INFO L87 Difference]: Start difference. First operand 3171 states and 5433 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 03:47:34,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:47:34,209 INFO L93 Difference]: Finished difference Result 6148 states and 9706 transitions. [2022-11-03 03:47:34,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:47:34,210 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 107 [2022-11-03 03:47:34,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:47:34,231 INFO L225 Difference]: With dead ends: 6148 [2022-11-03 03:47:34,232 INFO L226 Difference]: Without dead ends: 4623 [2022-11-03 03:47:34,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:47:34,242 INFO L413 NwaCegarLoop]: 3212 mSDtfsCounter, 3386 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3386 SdHoareTripleChecker+Valid, 3324 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:47:34,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3386 Valid, 3324 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 03:47:34,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4623 states. [2022-11-03 03:47:34,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4623 to 4595. [2022-11-03 03:47:34,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4595 states, 3979 states have (on average 1.6544357878864036) internal successors, (6583), 3998 states have internal predecessors, (6583), 406 states have call successors, (406), 209 states have call predecessors, (406), 208 states have return successors, (404), 388 states have call predecessors, (404), 404 states have call successors, (404) [2022-11-03 03:47:34,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4595 states to 4595 states and 7393 transitions. [2022-11-03 03:47:34,455 INFO L78 Accepts]: Start accepts. Automaton has 4595 states and 7393 transitions. Word has length 107 [2022-11-03 03:47:34,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:47:34,455 INFO L495 AbstractCegarLoop]: Abstraction has 4595 states and 7393 transitions. [2022-11-03 03:47:34,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 03:47:34,456 INFO L276 IsEmpty]: Start isEmpty. Operand 4595 states and 7393 transitions. [2022-11-03 03:47:34,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 03:47:34,466 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:34,466 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 03:47:34,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 03:47:34,467 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:34,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:34,467 INFO L85 PathProgramCache]: Analyzing trace with hash -936600079, now seen corresponding path program 1 times [2022-11-03 03:47:34,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:47:34,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473299971] [2022-11-03 03:47:34,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:34,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:47:34,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:34,830 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 10 proven. 33 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-03 03:47:34,832 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:47:34,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473299971] [2022-11-03 03:47:34,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473299971] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:47:34,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243660288] [2022-11-03 03:47:34,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:34,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:47:34,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:47:34,835 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:47:34,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 03:47:35,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:35,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 654 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:47:35,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:47:35,078 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 03:47:35,079 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:47:35,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243660288] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:47:35,079 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:47:35,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-03 03:47:35,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507262232] [2022-11-03 03:47:35,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:47:35,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:47:35,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:47:35,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:47:35,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:47:35,084 INFO L87 Difference]: Start difference. First operand 4595 states and 7393 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 03:47:35,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:47:35,804 INFO L93 Difference]: Finished difference Result 6139 states and 9671 transitions. [2022-11-03 03:47:35,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:47:35,805 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 124 [2022-11-03 03:47:35,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:47:35,830 INFO L225 Difference]: With dead ends: 6139 [2022-11-03 03:47:35,830 INFO L226 Difference]: Without dead ends: 4615 [2022-11-03 03:47:35,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:47:35,839 INFO L413 NwaCegarLoop]: 3263 mSDtfsCounter, 113 mSDsluCounter, 3404 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 6433 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:47:35,840 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 6433 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 03:47:35,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4615 states. [2022-11-03 03:47:36,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4615 to 4579. [2022-11-03 03:47:36,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4579 states, 3963 states have (on average 1.640928589452435) internal successors, (6503), 3982 states have internal predecessors, (6503), 406 states have call successors, (406), 209 states have call predecessors, (406), 208 states have return successors, (404), 388 states have call predecessors, (404), 404 states have call successors, (404) [2022-11-03 03:47:36,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4579 states to 4579 states and 7313 transitions. [2022-11-03 03:47:36,169 INFO L78 Accepts]: Start accepts. Automaton has 4579 states and 7313 transitions. Word has length 124 [2022-11-03 03:47:36,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:47:36,170 INFO L495 AbstractCegarLoop]: Abstraction has 4579 states and 7313 transitions. [2022-11-03 03:47:36,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 03:47:36,170 INFO L276 IsEmpty]: Start isEmpty. Operand 4579 states and 7313 transitions. [2022-11-03 03:47:36,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 03:47:36,180 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:36,180 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:47:36,218 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 03:47:36,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:47:36,395 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:36,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:36,395 INFO L85 PathProgramCache]: Analyzing trace with hash 1027028339, now seen corresponding path program 1 times [2022-11-03 03:47:36,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:47:36,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711271805] [2022-11-03 03:47:36,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:36,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:47:36,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:36,746 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-03 03:47:36,746 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:47:36,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711271805] [2022-11-03 03:47:36,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711271805] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:47:36,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843566684] [2022-11-03 03:47:36,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:36,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:47:36,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:47:36,751 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:47:36,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 03:47:36,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:36,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 660 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 03:47:36,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:47:36,961 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 03:47:36,961 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:47:36,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843566684] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:47:36,961 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:47:36,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-03 03:47:36,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037943572] [2022-11-03 03:47:36,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:47:36,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:47:36,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:47:36,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:47:36,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:47:36,963 INFO L87 Difference]: Start difference. First operand 4579 states and 7313 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 03:47:37,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:47:37,520 INFO L93 Difference]: Finished difference Result 6793 states and 10278 transitions. [2022-11-03 03:47:37,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:47:37,525 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 124 [2022-11-03 03:47:37,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:47:37,570 INFO L225 Difference]: With dead ends: 6793 [2022-11-03 03:47:37,570 INFO L226 Difference]: Without dead ends: 5293 [2022-11-03 03:47:37,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:47:37,578 INFO L413 NwaCegarLoop]: 3192 mSDtfsCounter, 3392 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3392 SdHoareTripleChecker+Valid, 3221 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:47:37,579 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3392 Valid, 3221 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 03:47:37,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5293 states. [2022-11-03 03:47:37,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5293 to 5293. [2022-11-03 03:47:37,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5293 states, 4585 states have (on average 1.5784078516902944) internal successors, (7237), 4604 states have internal predecessors, (7237), 436 states have call successors, (436), 271 states have call predecessors, (436), 270 states have return successors, (434), 418 states have call predecessors, (434), 434 states have call successors, (434) [2022-11-03 03:47:37,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5293 states to 5293 states and 8107 transitions. [2022-11-03 03:47:37,821 INFO L78 Accepts]: Start accepts. Automaton has 5293 states and 8107 transitions. Word has length 124 [2022-11-03 03:47:37,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:47:37,823 INFO L495 AbstractCegarLoop]: Abstraction has 5293 states and 8107 transitions. [2022-11-03 03:47:37,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 03:47:37,823 INFO L276 IsEmpty]: Start isEmpty. Operand 5293 states and 8107 transitions. [2022-11-03 03:47:37,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-11-03 03:47:37,837 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:37,837 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:47:37,884 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 03:47:38,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:47:38,059 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:38,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:38,059 INFO L85 PathProgramCache]: Analyzing trace with hash 345207817, now seen corresponding path program 1 times [2022-11-03 03:47:38,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:47:38,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426793640] [2022-11-03 03:47:38,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:38,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:47:38,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:38,318 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-03 03:47:38,318 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:47:38,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426793640] [2022-11-03 03:47:38,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426793640] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:47:38,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903270673] [2022-11-03 03:47:38,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:38,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:47:38,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:47:38,320 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:47:38,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 03:47:38,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:38,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 646 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:47:38,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:47:38,528 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 03:47:38,528 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:47:38,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903270673] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:47:38,529 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:47:38,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-03 03:47:38,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112512306] [2022-11-03 03:47:38,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:47:38,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:47:38,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:47:38,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:47:38,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:47:38,531 INFO L87 Difference]: Start difference. First operand 5293 states and 8107 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 03:47:39,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:47:39,333 INFO L93 Difference]: Finished difference Result 10233 states and 14820 transitions. [2022-11-03 03:47:39,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:47:39,333 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 121 [2022-11-03 03:47:39,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:47:39,358 INFO L225 Difference]: With dead ends: 10233 [2022-11-03 03:47:39,358 INFO L226 Difference]: Without dead ends: 6587 [2022-11-03 03:47:39,369 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:47:39,370 INFO L413 NwaCegarLoop]: 3199 mSDtfsCounter, 66 mSDsluCounter, 3397 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 6365 SdHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:47:39,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 6365 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 478 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 03:47:39,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6587 states. [2022-11-03 03:47:39,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6587 to 5669. [2022-11-03 03:47:39,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5669 states, 4925 states have (on average 1.5807106598984773) internal successors, (7785), 4945 states have internal predecessors, (7785), 454 states have call successors, (454), 289 states have call predecessors, (454), 288 states have return successors, (452), 435 states have call predecessors, (452), 452 states have call successors, (452) [2022-11-03 03:47:39,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5669 states to 5669 states and 8691 transitions. [2022-11-03 03:47:39,642 INFO L78 Accepts]: Start accepts. Automaton has 5669 states and 8691 transitions. Word has length 121 [2022-11-03 03:47:39,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:47:39,643 INFO L495 AbstractCegarLoop]: Abstraction has 5669 states and 8691 transitions. [2022-11-03 03:47:39,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 03:47:39,643 INFO L276 IsEmpty]: Start isEmpty. Operand 5669 states and 8691 transitions. [2022-11-03 03:47:39,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-11-03 03:47:39,656 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:39,656 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:47:39,697 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 03:47:39,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-03 03:47:39,871 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:39,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:39,871 INFO L85 PathProgramCache]: Analyzing trace with hash -439759030, now seen corresponding path program 2 times [2022-11-03 03:47:39,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:47:39,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513959873] [2022-11-03 03:47:39,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:39,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:47:39,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:39,994 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-03 03:47:39,995 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:47:39,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513959873] [2022-11-03 03:47:39,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513959873] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:47:39,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707132725] [2022-11-03 03:47:39,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 03:47:39,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:47:39,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:47:39,997 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:47:40,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 03:47:40,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 03:47:40,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:47:40,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 643 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 03:47:40,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:47:40,201 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 03:47:40,201 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:47:40,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707132725] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:47:40,201 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:47:40,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-03 03:47:40,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030195068] [2022-11-03 03:47:40,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:47:40,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:47:40,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:47:40,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:47:40,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:47:40,206 INFO L87 Difference]: Start difference. First operand 5669 states and 8691 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 03:47:40,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:47:40,976 INFO L93 Difference]: Finished difference Result 9059 states and 13405 transitions. [2022-11-03 03:47:40,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:47:40,977 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 121 [2022-11-03 03:47:40,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:47:41,001 INFO L225 Difference]: With dead ends: 9059 [2022-11-03 03:47:41,002 INFO L226 Difference]: Without dead ends: 6999 [2022-11-03 03:47:41,010 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:47:41,011 INFO L413 NwaCegarLoop]: 3254 mSDtfsCounter, 75 mSDsluCounter, 3414 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 6436 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:47:41,011 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 6436 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 03:47:41,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6999 states. [2022-11-03 03:47:41,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6999 to 6309. [2022-11-03 03:47:41,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6309 states, 5501 states have (on average 1.580985275404472) internal successors, (8697), 5521 states have internal predecessors, (8697), 486 states have call successors, (486), 321 states have call predecessors, (486), 320 states have return successors, (484), 467 states have call predecessors, (484), 484 states have call successors, (484) [2022-11-03 03:47:41,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6309 states to 6309 states and 9667 transitions. [2022-11-03 03:47:41,338 INFO L78 Accepts]: Start accepts. Automaton has 6309 states and 9667 transitions. Word has length 121 [2022-11-03 03:47:41,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:47:41,339 INFO L495 AbstractCegarLoop]: Abstraction has 6309 states and 9667 transitions. [2022-11-03 03:47:41,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 03:47:41,340 INFO L276 IsEmpty]: Start isEmpty. Operand 6309 states and 9667 transitions. [2022-11-03 03:47:41,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-11-03 03:47:41,355 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:41,355 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:47:41,394 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 03:47:41,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-03 03:47:41,571 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:41,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:41,572 INFO L85 PathProgramCache]: Analyzing trace with hash 246387157, now seen corresponding path program 1 times [2022-11-03 03:47:41,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:47:41,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705200558] [2022-11-03 03:47:41,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:41,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:47:41,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:41,714 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-03 03:47:41,715 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:47:41,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705200558] [2022-11-03 03:47:41,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705200558] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:47:41,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703617296] [2022-11-03 03:47:41,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:41,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:47:41,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:47:41,717 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:47:41,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 03:47:41,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:41,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 640 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 03:47:41,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:47:41,947 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 03:47:41,947 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:47:41,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703617296] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:47:41,948 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:47:41,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-03 03:47:41,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122306827] [2022-11-03 03:47:41,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:47:41,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:47:41,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:47:41,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:47:41,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:47:41,950 INFO L87 Difference]: Start difference. First operand 6309 states and 9667 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 03:47:43,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:47:43,045 INFO L93 Difference]: Finished difference Result 10563 states and 15661 transitions. [2022-11-03 03:47:43,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:47:43,046 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 121 [2022-11-03 03:47:43,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:47:43,101 INFO L225 Difference]: With dead ends: 10563 [2022-11-03 03:47:43,102 INFO L226 Difference]: Without dead ends: 8151 [2022-11-03 03:47:43,113 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:47:43,114 INFO L413 NwaCegarLoop]: 3264 mSDtfsCounter, 87 mSDsluCounter, 3414 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 6446 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:47:43,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 6446 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 03:47:43,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8151 states. [2022-11-03 03:47:43,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8151 to 7237. [2022-11-03 03:47:43,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7237 states, 6333 states have (on average 1.579188378335702) internal successors, (10001), 6353 states have internal predecessors, (10001), 534 states have call successors, (534), 369 states have call predecessors, (534), 368 states have return successors, (532), 515 states have call predecessors, (532), 532 states have call successors, (532) [2022-11-03 03:47:43,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7237 states to 7237 states and 11067 transitions. [2022-11-03 03:47:43,620 INFO L78 Accepts]: Start accepts. Automaton has 7237 states and 11067 transitions. Word has length 121 [2022-11-03 03:47:43,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:47:43,621 INFO L495 AbstractCegarLoop]: Abstraction has 7237 states and 11067 transitions. [2022-11-03 03:47:43,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 03:47:43,622 INFO L276 IsEmpty]: Start isEmpty. Operand 7237 states and 11067 transitions. [2022-11-03 03:47:43,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-11-03 03:47:43,641 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:43,641 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:47:43,676 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-03 03:47:43,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:47:43,863 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:43,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:43,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1165022545, now seen corresponding path program 1 times [2022-11-03 03:47:43,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:47:43,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883336304] [2022-11-03 03:47:43,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:43,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:47:43,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:44,033 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 21 proven. 3 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-03 03:47:44,034 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:47:44,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883336304] [2022-11-03 03:47:44,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883336304] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:47:44,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23582385] [2022-11-03 03:47:44,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:44,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:47:44,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:47:44,036 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:47:44,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 03:47:44,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:44,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 643 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 03:47:44,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:47:44,232 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 03:47:44,232 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:47:44,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23582385] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:47:44,233 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:47:44,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-03 03:47:44,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752903009] [2022-11-03 03:47:44,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:47:44,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:47:44,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:47:44,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:47:44,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:47:44,235 INFO L87 Difference]: Start difference. First operand 7237 states and 11067 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 03:47:45,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:47:45,158 INFO L93 Difference]: Finished difference Result 12187 states and 18101 transitions. [2022-11-03 03:47:45,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:47:45,159 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 121 [2022-11-03 03:47:45,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:47:45,199 INFO L225 Difference]: With dead ends: 12187 [2022-11-03 03:47:45,200 INFO L226 Difference]: Without dead ends: 9323 [2022-11-03 03:47:45,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:47:45,211 INFO L413 NwaCegarLoop]: 3259 mSDtfsCounter, 81 mSDsluCounter, 3414 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 6441 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:47:45,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 6441 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 03:47:45,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9323 states. [2022-11-03 03:47:45,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9323 to 8521. [2022-11-03 03:47:45,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8521 states, 7473 states have (on average 1.5711227084169677) internal successors, (11741), 7493 states have internal predecessors, (11741), 606 states have call successors, (606), 441 states have call predecessors, (606), 440 states have return successors, (604), 587 states have call predecessors, (604), 604 states have call successors, (604) [2022-11-03 03:47:45,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8521 states to 8521 states and 12951 transitions. [2022-11-03 03:47:45,661 INFO L78 Accepts]: Start accepts. Automaton has 8521 states and 12951 transitions. Word has length 121 [2022-11-03 03:47:45,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:47:45,661 INFO L495 AbstractCegarLoop]: Abstraction has 8521 states and 12951 transitions. [2022-11-03 03:47:45,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 03:47:45,662 INFO L276 IsEmpty]: Start isEmpty. Operand 8521 states and 12951 transitions. [2022-11-03 03:47:45,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-11-03 03:47:45,680 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:45,681 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:47:45,721 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-03 03:47:45,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:47:45,895 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:45,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:45,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1822751191, now seen corresponding path program 1 times [2022-11-03 03:47:45,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:47:45,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003252575] [2022-11-03 03:47:45,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:45,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:47:45,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:46,145 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 14 proven. 32 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-03 03:47:46,145 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:47:46,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003252575] [2022-11-03 03:47:46,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003252575] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:47:46,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996734331] [2022-11-03 03:47:46,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:46,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:47:46,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:47:46,147 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:47:46,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-03 03:47:46,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:46,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 666 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:47:46,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:47:46,375 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 03:47:46,376 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:47:46,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996734331] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:47:46,376 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:47:46,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-03 03:47:46,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972532881] [2022-11-03 03:47:46,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:47:46,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:47:46,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:47:46,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:47:46,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:47:46,378 INFO L87 Difference]: Start difference. First operand 8521 states and 12951 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 03:47:47,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:47:47,285 INFO L93 Difference]: Finished difference Result 12737 states and 19109 transitions. [2022-11-03 03:47:47,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:47:47,285 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 126 [2022-11-03 03:47:47,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:47:47,308 INFO L225 Difference]: With dead ends: 12737 [2022-11-03 03:47:47,308 INFO L226 Difference]: Without dead ends: 8541 [2022-11-03 03:47:47,317 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:47:47,318 INFO L413 NwaCegarLoop]: 3270 mSDtfsCounter, 109 mSDsluCounter, 3403 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 6439 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:47:47,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 6439 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 03:47:47,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8541 states. [2022-11-03 03:47:47,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8541 to 8409. [2022-11-03 03:47:47,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8409 states, 7361 states have (on average 1.5559027306072544) internal successors, (11453), 7381 states have internal predecessors, (11453), 606 states have call successors, (606), 441 states have call predecessors, (606), 440 states have return successors, (604), 587 states have call predecessors, (604), 604 states have call successors, (604) [2022-11-03 03:47:47,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8409 states to 8409 states and 12663 transitions. [2022-11-03 03:47:47,723 INFO L78 Accepts]: Start accepts. Automaton has 8409 states and 12663 transitions. Word has length 126 [2022-11-03 03:47:47,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:47:47,723 INFO L495 AbstractCegarLoop]: Abstraction has 8409 states and 12663 transitions. [2022-11-03 03:47:47,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 03:47:47,724 INFO L276 IsEmpty]: Start isEmpty. Operand 8409 states and 12663 transitions. [2022-11-03 03:47:47,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-11-03 03:47:47,738 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:47,739 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:47:47,778 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-03 03:47:47,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-03 03:47:47,967 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:47,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:47,967 INFO L85 PathProgramCache]: Analyzing trace with hash -147694007, now seen corresponding path program 1 times [2022-11-03 03:47:47,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:47:47,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842224265] [2022-11-03 03:47:47,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:47,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:47:47,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:48,208 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 14 proven. 30 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-03 03:47:48,209 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:47:48,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842224265] [2022-11-03 03:47:48,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842224265] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:47:48,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678659370] [2022-11-03 03:47:48,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:48,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:47:48,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:47:48,211 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:47:48,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-03 03:47:48,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:48,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 672 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 03:47:48,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:47:48,467 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 03:47:48,468 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:47:48,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678659370] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:47:48,468 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:47:48,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-11-03 03:47:48,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130230246] [2022-11-03 03:47:48,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:47:48,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:47:48,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:47:48,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:47:48,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:47:48,471 INFO L87 Difference]: Start difference. First operand 8409 states and 12663 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-03 03:47:49,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:47:49,703 INFO L93 Difference]: Finished difference Result 21647 states and 30987 transitions. [2022-11-03 03:47:49,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:47:49,703 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 126 [2022-11-03 03:47:49,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:47:49,755 INFO L225 Difference]: With dead ends: 21647 [2022-11-03 03:47:49,756 INFO L226 Difference]: Without dead ends: 14885 [2022-11-03 03:47:49,774 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-03 03:47:49,774 INFO L413 NwaCegarLoop]: 3299 mSDtfsCounter, 3401 mSDsluCounter, 3668 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3401 SdHoareTripleChecker+Valid, 6696 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:47:49,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3401 Valid, 6696 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 548 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 03:47:49,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14885 states. [2022-11-03 03:47:50,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14885 to 14861. [2022-11-03 03:47:50,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14861 states, 12779 states have (on average 1.482353861804523) internal successors, (18943), 12832 states have internal predecessors, (18943), 1187 states have call successors, (1187), 878 states have call predecessors, (1187), 893 states have return successors, (1233), 1151 states have call predecessors, (1233), 1185 states have call successors, (1233) [2022-11-03 03:47:50,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14861 states to 14861 states and 21363 transitions. [2022-11-03 03:47:50,700 INFO L78 Accepts]: Start accepts. Automaton has 14861 states and 21363 transitions. Word has length 126 [2022-11-03 03:47:50,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:47:50,701 INFO L495 AbstractCegarLoop]: Abstraction has 14861 states and 21363 transitions. [2022-11-03 03:47:50,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-03 03:47:50,701 INFO L276 IsEmpty]: Start isEmpty. Operand 14861 states and 21363 transitions. [2022-11-03 03:47:50,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-11-03 03:47:50,735 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:50,735 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:47:50,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-03 03:47:50,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-03 03:47:50,951 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:50,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:50,951 INFO L85 PathProgramCache]: Analyzing trace with hash -268380154, now seen corresponding path program 1 times [2022-11-03 03:47:50,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:47:50,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065949467] [2022-11-03 03:47:50,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:50,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:47:50,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:51,174 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 13 proven. 31 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-03 03:47:51,174 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:47:51,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065949467] [2022-11-03 03:47:51,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065949467] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:47:51,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071384211] [2022-11-03 03:47:51,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:51,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:47:51,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:47:51,177 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:47:51,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-03 03:47:51,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:51,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 669 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 03:47:51,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:47:51,469 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-03 03:47:51,469 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:47:51,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071384211] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:47:51,469 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:47:51,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2022-11-03 03:47:51,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382026110] [2022-11-03 03:47:51,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:47:51,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:47:51,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:47:51,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:47:51,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:47:51,471 INFO L87 Difference]: Start difference. First operand 14861 states and 21363 transitions. Second operand has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 03:47:52,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:47:52,971 INFO L93 Difference]: Finished difference Result 25294 states and 35496 transitions. [2022-11-03 03:47:52,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 03:47:52,971 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 126 [2022-11-03 03:47:52,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:47:53,011 INFO L225 Difference]: With dead ends: 25294 [2022-11-03 03:47:53,012 INFO L226 Difference]: Without dead ends: 12080 [2022-11-03 03:47:53,039 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-03 03:47:53,040 INFO L413 NwaCegarLoop]: 3193 mSDtfsCounter, 6940 mSDsluCounter, 6743 mSDsCounter, 0 mSdLazyCounter, 778 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6953 SdHoareTripleChecker+Valid, 9477 SdHoareTripleChecker+Invalid, 902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 03:47:53,040 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6953 Valid, 9477 Invalid, 902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 778 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 03:47:53,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12080 states. [2022-11-03 03:47:53,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12080 to 11822. [2022-11-03 03:47:53,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11822 states, 10223 states have (on average 1.493984153379634) internal successors, (15273), 10267 states have internal predecessors, (15273), 903 states have call successors, (903), 663 states have call predecessors, (903), 694 states have return successors, (933), 892 states have call predecessors, (933), 901 states have call successors, (933) [2022-11-03 03:47:53,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11822 states to 11822 states and 17109 transitions. [2022-11-03 03:47:53,616 INFO L78 Accepts]: Start accepts. Automaton has 11822 states and 17109 transitions. Word has length 126 [2022-11-03 03:47:53,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:47:53,617 INFO L495 AbstractCegarLoop]: Abstraction has 11822 states and 17109 transitions. [2022-11-03 03:47:53,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 03:47:53,617 INFO L276 IsEmpty]: Start isEmpty. Operand 11822 states and 17109 transitions. [2022-11-03 03:47:53,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-03 03:47:53,640 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:53,640 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:47:53,686 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-03 03:47:53,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:47:53,855 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:53,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:53,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1618636330, now seen corresponding path program 2 times [2022-11-03 03:47:53,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:47:53,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673173596] [2022-11-03 03:47:53,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:53,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:47:53,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:54,064 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 14 proven. 31 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-03 03:47:54,064 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:47:54,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673173596] [2022-11-03 03:47:54,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673173596] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:47:54,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704621162] [2022-11-03 03:47:54,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 03:47:54,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:47:54,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:47:54,066 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:47:54,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-03 03:47:54,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 03:47:54,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:47:54,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 617 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:47:54,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:47:54,260 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-03 03:47:54,260 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:47:54,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704621162] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:47:54,261 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:47:54,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-03 03:47:54,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971060188] [2022-11-03 03:47:54,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:47:54,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:47:54,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:47:54,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:47:54,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:47:54,263 INFO L87 Difference]: Start difference. First operand 11822 states and 17109 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 03:47:55,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:47:55,383 INFO L93 Difference]: Finished difference Result 15219 states and 21817 transitions. [2022-11-03 03:47:55,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:47:55,384 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 127 [2022-11-03 03:47:55,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:47:55,423 INFO L225 Difference]: With dead ends: 15219 [2022-11-03 03:47:55,423 INFO L226 Difference]: Without dead ends: 11542 [2022-11-03 03:47:55,435 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:47:55,436 INFO L413 NwaCegarLoop]: 3193 mSDtfsCounter, 28 mSDsluCounter, 3405 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 6366 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:47:55,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 6366 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 03:47:55,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11542 states. [2022-11-03 03:47:55,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11542 to 11102. [2022-11-03 03:47:55,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11102 states, 9599 states have (on average 1.5102614855714136) internal successors, (14497), 9619 states have internal predecessors, (14497), 871 states have call successors, (871), 631 states have call predecessors, (871), 630 states have return successors, (869), 852 states have call predecessors, (869), 869 states have call successors, (869) [2022-11-03 03:47:56,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11102 states to 11102 states and 16237 transitions. [2022-11-03 03:47:56,010 INFO L78 Accepts]: Start accepts. Automaton has 11102 states and 16237 transitions. Word has length 127 [2022-11-03 03:47:56,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:47:56,011 INFO L495 AbstractCegarLoop]: Abstraction has 11102 states and 16237 transitions. [2022-11-03 03:47:56,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 03:47:56,011 INFO L276 IsEmpty]: Start isEmpty. Operand 11102 states and 16237 transitions. [2022-11-03 03:47:56,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-03 03:47:56,030 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:56,030 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:47:56,072 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-03 03:47:56,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-03 03:47:56,256 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:56,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:56,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1317968355, now seen corresponding path program 1 times [2022-11-03 03:47:56,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:47:56,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245035661] [2022-11-03 03:47:56,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:56,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:47:56,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:56,501 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 15 proven. 31 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-03 03:47:56,502 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:47:56,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245035661] [2022-11-03 03:47:56,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245035661] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:47:56,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193818640] [2022-11-03 03:47:56,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:56,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:47:56,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:47:56,504 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:47:56,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-03 03:47:56,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:56,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 676 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 03:47:56,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:47:56,762 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-03 03:47:56,762 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:47:56,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193818640] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:47:56,762 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:47:56,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2022-11-03 03:47:56,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948416515] [2022-11-03 03:47:56,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:47:56,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:47:56,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:47:56,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:47:56,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:47:56,765 INFO L87 Difference]: Start difference. First operand 11102 states and 16237 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 03:47:58,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:47:58,832 INFO L93 Difference]: Finished difference Result 23938 states and 33719 transitions. [2022-11-03 03:47:58,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 03:47:58,833 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 127 [2022-11-03 03:47:58,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:47:58,891 INFO L225 Difference]: With dead ends: 23938 [2022-11-03 03:47:58,892 INFO L226 Difference]: Without dead ends: 14528 [2022-11-03 03:47:58,911 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-03 03:47:58,912 INFO L413 NwaCegarLoop]: 3181 mSDtfsCounter, 6986 mSDsluCounter, 6720 mSDsCounter, 0 mSdLazyCounter, 761 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6999 SdHoareTripleChecker+Valid, 9445 SdHoareTripleChecker+Invalid, 918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 03:47:58,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6999 Valid, 9445 Invalid, 918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 761 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 03:47:58,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14528 states. [2022-11-03 03:47:59,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14528 to 14524. [2022-11-03 03:47:59,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14524 states, 12405 states have (on average 1.4615880693268843) internal successors, (18131), 12433 states have internal predecessors, (18131), 1231 states have call successors, (1231), 887 states have call predecessors, (1231), 886 states have return successors, (1229), 1204 states have call predecessors, (1229), 1229 states have call successors, (1229) [2022-11-03 03:47:59,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14524 states to 14524 states and 20591 transitions. [2022-11-03 03:47:59,964 INFO L78 Accepts]: Start accepts. Automaton has 14524 states and 20591 transitions. Word has length 127 [2022-11-03 03:47:59,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:47:59,965 INFO L495 AbstractCegarLoop]: Abstraction has 14524 states and 20591 transitions. [2022-11-03 03:47:59,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 03:47:59,965 INFO L276 IsEmpty]: Start isEmpty. Operand 14524 states and 20591 transitions. [2022-11-03 03:47:59,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-03 03:47:59,989 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:59,989 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:48:00,032 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-11-03 03:48:00,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-03 03:48:00,215 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:48:00,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:48:00,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1464685185, now seen corresponding path program 1 times [2022-11-03 03:48:00,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:48:00,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444076362] [2022-11-03 03:48:00,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:00,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:48:00,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:48:00,451 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 17 proven. 31 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-03 03:48:00,452 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:48:00,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444076362] [2022-11-03 03:48:00,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444076362] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:48:00,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261430246] [2022-11-03 03:48:00,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:00,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:48:00,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:48:00,454 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:48:00,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-03 03:48:00,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:48:00,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 690 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 03:48:00,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:48:00,725 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-03 03:48:00,725 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:48:00,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261430246] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:48:00,725 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:48:00,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2022-11-03 03:48:00,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658482894] [2022-11-03 03:48:00,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:48:00,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:48:00,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:48:00,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:48:00,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:48:00,727 INFO L87 Difference]: Start difference. First operand 14524 states and 20591 transitions. Second operand has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 03:48:02,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:48:02,649 INFO L93 Difference]: Finished difference Result 32104 states and 44079 transitions. [2022-11-03 03:48:02,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 03:48:02,650 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 129 [2022-11-03 03:48:02,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:48:02,712 INFO L225 Difference]: With dead ends: 32104 [2022-11-03 03:48:02,713 INFO L226 Difference]: Without dead ends: 19272 [2022-11-03 03:48:02,739 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-03 03:48:02,739 INFO L413 NwaCegarLoop]: 3187 mSDtfsCounter, 3638 mSDsluCounter, 6779 mSDsCounter, 0 mSdLazyCounter, 787 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3651 SdHoareTripleChecker+Valid, 9498 SdHoareTripleChecker+Invalid, 915 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 03:48:02,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3651 Valid, 9498 Invalid, 915 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 787 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 03:48:02,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19272 states. [2022-11-03 03:48:04,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19272 to 19268. [2022-11-03 03:48:04,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19268 states, 16271 states have (on average 1.4158318480732592) internal successors, (23037), 16311 states have internal predecessors, (23037), 1745 states have call successors, (1745), 1251 states have call predecessors, (1745), 1250 states have return successors, (1743), 1706 states have call predecessors, (1743), 1743 states have call successors, (1743) [2022-11-03 03:48:04,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19268 states to 19268 states and 26525 transitions. [2022-11-03 03:48:04,118 INFO L78 Accepts]: Start accepts. Automaton has 19268 states and 26525 transitions. Word has length 129 [2022-11-03 03:48:04,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:48:04,119 INFO L495 AbstractCegarLoop]: Abstraction has 19268 states and 26525 transitions. [2022-11-03 03:48:04,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 03:48:04,119 INFO L276 IsEmpty]: Start isEmpty. Operand 19268 states and 26525 transitions. [2022-11-03 03:48:04,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-03 03:48:04,148 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:48:04,148 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:48:04,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-03 03:48:04,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:48:04,355 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:48:04,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:48:04,355 INFO L85 PathProgramCache]: Analyzing trace with hash 536341272, now seen corresponding path program 1 times [2022-11-03 03:48:04,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:48:04,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389203948] [2022-11-03 03:48:04,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:04,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:48:04,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:48:04,562 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 21 proven. 31 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-03 03:48:04,563 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:48:04,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389203948] [2022-11-03 03:48:04,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389203948] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:48:04,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789710786] [2022-11-03 03:48:04,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:04,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:48:04,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:48:04,565 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:48:04,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-03 03:48:04,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:48:04,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 690 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 03:48:04,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:48:04,841 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-03 03:48:04,841 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:48:04,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789710786] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:48:04,842 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:48:04,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2022-11-03 03:48:04,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428212063] [2022-11-03 03:48:04,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:48:04,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:48:04,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:48:04,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:48:04,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:48:04,845 INFO L87 Difference]: Start difference. First operand 19268 states and 26525 transitions. Second operand has 6 states, 5 states have (on average 17.2) internal successors, (86), 6 states have internal predecessors, (86), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 03:48:07,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:48:07,413 INFO L93 Difference]: Finished difference Result 43593 states and 58531 transitions. [2022-11-03 03:48:07,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 03:48:07,414 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 17.2) internal successors, (86), 6 states have internal predecessors, (86), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 129 [2022-11-03 03:48:07,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:48:07,498 INFO L225 Difference]: With dead ends: 43593 [2022-11-03 03:48:07,499 INFO L226 Difference]: Without dead ends: 26017 [2022-11-03 03:48:07,528 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-03 03:48:07,529 INFO L413 NwaCegarLoop]: 3187 mSDtfsCounter, 3618 mSDsluCounter, 6787 mSDsCounter, 0 mSdLazyCounter, 804 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3631 SdHoareTripleChecker+Valid, 9505 SdHoareTripleChecker+Invalid, 913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 03:48:07,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3631 Valid, 9505 Invalid, 913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 804 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 03:48:07,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26017 states. [2022-11-03 03:48:09,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26017 to 26013. [2022-11-03 03:48:09,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26013 states, 21764 states have (on average 1.3780095570667157) internal successors, (29991), 21822 states have internal predecessors, (29991), 2479 states have call successors, (2479), 1769 states have call predecessors, (2479), 1768 states have return successors, (2477), 2422 states have call predecessors, (2477), 2477 states have call successors, (2477) [2022-11-03 03:48:09,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26013 states to 26013 states and 34947 transitions. [2022-11-03 03:48:09,719 INFO L78 Accepts]: Start accepts. Automaton has 26013 states and 34947 transitions. Word has length 129 [2022-11-03 03:48:09,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:48:09,719 INFO L495 AbstractCegarLoop]: Abstraction has 26013 states and 34947 transitions. [2022-11-03 03:48:09,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 17.2) internal successors, (86), 6 states have internal predecessors, (86), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 03:48:09,720 INFO L276 IsEmpty]: Start isEmpty. Operand 26013 states and 34947 transitions. [2022-11-03 03:48:09,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-11-03 03:48:09,771 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:48:09,771 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:48:09,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-03 03:48:09,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:48:09,988 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:48:09,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:48:09,989 INFO L85 PathProgramCache]: Analyzing trace with hash 575905821, now seen corresponding path program 1 times [2022-11-03 03:48:09,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:48:09,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262106039] [2022-11-03 03:48:09,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:09,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:48:10,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:48:10,207 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 37 proven. 13 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-03 03:48:10,208 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:48:10,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262106039] [2022-11-03 03:48:10,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262106039] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:48:10,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208507546] [2022-11-03 03:48:10,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:10,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:48:10,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:48:10,210 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:48:10,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-03 03:48:10,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:48:10,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 704 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 03:48:10,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:48:10,476 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 03:48:10,477 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:48:10,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208507546] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:48:10,477 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:48:10,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2022-11-03 03:48:10,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516273707] [2022-11-03 03:48:10,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:48:10,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:48:10,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:48:10,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:48:10,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:48:10,479 INFO L87 Difference]: Start difference. First operand 26013 states and 34947 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 03:48:12,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:48:12,792 INFO L93 Difference]: Finished difference Result 46711 states and 62172 transitions. [2022-11-03 03:48:12,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:48:12,793 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 131 [2022-11-03 03:48:12,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:48:12,877 INFO L225 Difference]: With dead ends: 46711 [2022-11-03 03:48:12,877 INFO L226 Difference]: Without dead ends: 29571 [2022-11-03 03:48:12,908 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 133 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 03:48:12,908 INFO L413 NwaCegarLoop]: 3195 mSDtfsCounter, 3364 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3364 SdHoareTripleChecker+Valid, 3231 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:48:12,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3364 Valid, 3231 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 03:48:12,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29571 states. [2022-11-03 03:48:14,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29571 to 29303. [2022-11-03 03:48:14,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29303 states, 24815 states have (on average 1.349304855933911) internal successors, (33483), 24873 states have internal predecessors, (33483), 2517 states have call successors, (2517), 1970 states have call predecessors, (2517), 1969 states have return successors, (2687), 2460 states have call predecessors, (2687), 2515 states have call successors, (2687) [2022-11-03 03:48:14,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29303 states to 29303 states and 38687 transitions. [2022-11-03 03:48:14,981 INFO L78 Accepts]: Start accepts. Automaton has 29303 states and 38687 transitions. Word has length 131 [2022-11-03 03:48:14,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:48:14,981 INFO L495 AbstractCegarLoop]: Abstraction has 29303 states and 38687 transitions. [2022-11-03 03:48:14,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 03:48:14,982 INFO L276 IsEmpty]: Start isEmpty. Operand 29303 states and 38687 transitions. [2022-11-03 03:48:15,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-11-03 03:48:15,021 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:48:15,021 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:48:15,046 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-03 03:48:15,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:48:15,227 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:48:15,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:48:15,227 INFO L85 PathProgramCache]: Analyzing trace with hash 2144409157, now seen corresponding path program 1 times [2022-11-03 03:48:15,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:48:15,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906473638] [2022-11-03 03:48:15,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:15,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:48:15,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:48:15,437 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 46 proven. 20 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-03 03:48:15,437 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:48:15,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906473638] [2022-11-03 03:48:15,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906473638] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:48:15,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696886498] [2022-11-03 03:48:15,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:15,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:48:15,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:48:15,439 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:48:15,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-03 03:48:15,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:48:15,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 702 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-03 03:48:15,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:48:15,702 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:48:15,702 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:48:15,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696886498] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:48:15,703 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:48:15,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 6 [2022-11-03 03:48:15,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568186825] [2022-11-03 03:48:15,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:48:15,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:48:15,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:48:15,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:48:15,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:48:15,705 INFO L87 Difference]: Start difference. First operand 29303 states and 38687 transitions. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 5 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-11-03 03:48:19,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:48:19,538 INFO L93 Difference]: Finished difference Result 56407 states and 73747 transitions. [2022-11-03 03:48:19,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 03:48:19,543 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 5 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 133 [2022-11-03 03:48:19,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:48:19,663 INFO L225 Difference]: With dead ends: 56407 [2022-11-03 03:48:19,664 INFO L226 Difference]: Without dead ends: 37077 [2022-11-03 03:48:19,705 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-03 03:48:19,706 INFO L413 NwaCegarLoop]: 3265 mSDtfsCounter, 235 mSDsluCounter, 10100 mSDsCounter, 0 mSdLazyCounter, 1085 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 12679 SdHoareTripleChecker+Invalid, 1147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1085 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 03:48:19,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 12679 Invalid, 1147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1085 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 03:48:19,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37077 states. [2022-11-03 03:48:22,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37077 to 34659. [2022-11-03 03:48:22,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34659 states, 29185 states have (on average 1.3298954942607504) internal successors, (38813), 29207 states have internal predecessors, (38813), 3123 states have call successors, (3123), 2414 states have call predecessors, (3123), 2349 states have return successors, (3383), 3038 states have call predecessors, (3383), 3121 states have call successors, (3383) [2022-11-03 03:48:22,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34659 states to 34659 states and 45319 transitions. [2022-11-03 03:48:22,968 INFO L78 Accepts]: Start accepts. Automaton has 34659 states and 45319 transitions. Word has length 133 [2022-11-03 03:48:22,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:48:22,971 INFO L495 AbstractCegarLoop]: Abstraction has 34659 states and 45319 transitions. [2022-11-03 03:48:22,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 5 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-11-03 03:48:22,972 INFO L276 IsEmpty]: Start isEmpty. Operand 34659 states and 45319 transitions. [2022-11-03 03:48:23,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-11-03 03:48:23,010 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:48:23,010 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:48:23,052 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-11-03 03:48:23,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:48:23,211 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:48:23,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:48:23,211 INFO L85 PathProgramCache]: Analyzing trace with hash 948646555, now seen corresponding path program 1 times [2022-11-03 03:48:23,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:48:23,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895143847] [2022-11-03 03:48:23,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:23,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:48:23,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:48:23,487 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 41 proven. 15 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-03 03:48:23,488 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:48:23,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895143847] [2022-11-03 03:48:23,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895143847] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:48:23,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644528590] [2022-11-03 03:48:23,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:23,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:48:23,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:48:23,490 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:48:23,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-03 03:48:23,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:48:23,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 704 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 03:48:23,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:48:23,751 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 03:48:23,751 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:48:23,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644528590] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:48:23,752 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:48:23,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2022-11-03 03:48:23,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559675383] [2022-11-03 03:48:23,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:48:23,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:48:23,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:48:23,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:48:23,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:48:23,754 INFO L87 Difference]: Start difference. First operand 34659 states and 45319 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 03:48:27,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:48:27,836 INFO L93 Difference]: Finished difference Result 62247 states and 81130 transitions. [2022-11-03 03:48:27,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:48:27,837 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 131 [2022-11-03 03:48:27,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:48:27,943 INFO L225 Difference]: With dead ends: 62247 [2022-11-03 03:48:27,944 INFO L226 Difference]: Without dead ends: 39209 [2022-11-03 03:48:27,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 133 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 03:48:27,991 INFO L413 NwaCegarLoop]: 3201 mSDtfsCounter, 3370 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3370 SdHoareTripleChecker+Valid, 3237 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:48:27,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3370 Valid, 3237 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 03:48:28,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39209 states. [2022-11-03 03:48:31,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39209 to 38445. [2022-11-03 03:48:31,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38445 states, 32695 states have (on average 1.3071417647958403) internal successors, (42737), 32771 states have internal predecessors, (42737), 3159 states have call successors, (3159), 2594 states have call predecessors, (3159), 2589 states have return successors, (3619), 3080 states have call predecessors, (3619), 3157 states have call successors, (3619) [2022-11-03 03:48:31,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38445 states to 38445 states and 49515 transitions. [2022-11-03 03:48:31,832 INFO L78 Accepts]: Start accepts. Automaton has 38445 states and 49515 transitions. Word has length 131 [2022-11-03 03:48:31,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:48:31,833 INFO L495 AbstractCegarLoop]: Abstraction has 38445 states and 49515 transitions. [2022-11-03 03:48:31,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 03:48:31,833 INFO L276 IsEmpty]: Start isEmpty. Operand 38445 states and 49515 transitions. [2022-11-03 03:48:31,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-11-03 03:48:31,873 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:48:31,873 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:48:31,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-03 03:48:32,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:48:32,074 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:48:32,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:48:32,074 INFO L85 PathProgramCache]: Analyzing trace with hash 474941591, now seen corresponding path program 1 times [2022-11-03 03:48:32,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:48:32,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815473657] [2022-11-03 03:48:32,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:32,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:48:32,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:48:32,183 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 26 proven. 1 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-03 03:48:32,183 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:48:32,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815473657] [2022-11-03 03:48:32,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815473657] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:48:32,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99206361] [2022-11-03 03:48:32,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:32,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:48:32,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:48:32,186 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:48:32,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca1a56d-e75a-4670-b2f7-8c17f57354b5/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-03 03:48:32,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:48:32,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 684 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 03:48:32,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:48:32,411 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 03:48:32,412 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:48:32,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99206361] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:48:32,412 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:48:32,412 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-03 03:48:32,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3766156] [2022-11-03 03:48:32,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:48:32,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:48:32,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:48:32,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:48:32,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:48:32,417 INFO L87 Difference]: Start difference. First operand 38445 states and 49515 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11)