./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label49+token_ring.05.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a362f7-d808-4521-ad06-0bf8dc6d38e0/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a362f7-d808-4521-ad06-0bf8dc6d38e0/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_10a362f7-d808-4521-ad06-0bf8dc6d38e0/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a362f7-d808-4521-ad06-0bf8dc6d38e0/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label49+token_ring.05.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a362f7-d808-4521-ad06-0bf8dc6d38e0/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_10a362f7-d808-4521-ad06-0bf8dc6d38e0/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 22315e954f625a92454f179210263631b555d33fa4f07d11e85c64617a347172 --- 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 02:19:15,458 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:19:15,461 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:19:15,511 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:19:15,511 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:19:15,515 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:19:15,518 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:19:15,523 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:19:15,525 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:19:15,531 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:19:15,532 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:19:15,534 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:19:15,535 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:19:15,537 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:19:15,539 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:19:15,544 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:19:15,546 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:19:15,547 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:19:15,548 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:19:15,555 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:19:15,556 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:19:15,558 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:19:15,561 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:19:15,562 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:19:15,570 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:19:15,571 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:19:15,571 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:19:15,574 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:19:15,574 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:19:15,575 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:19:15,576 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:19:15,577 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:19:15,579 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:19:15,582 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:19:15,583 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:19:15,583 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:19:15,584 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:19:15,585 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:19:15,585 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:19:15,586 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:19:15,587 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:19:15,589 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a362f7-d808-4521-ad06-0bf8dc6d38e0/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 02:19:15,630 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:19:15,630 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:19:15,631 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:19:15,631 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:19:15,632 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:19:15,633 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:19:15,633 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:19:15,633 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:19:15,634 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:19:15,634 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:19:15,635 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:19:15,636 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:19:15,636 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:19:15,636 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:19:15,636 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:19:15,637 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:19:15,637 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:19:15,637 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:19:15,638 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:19:15,639 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:19:15,639 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:19:15,639 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:19:15,640 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:19:15,640 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:19:15,640 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:19:15,640 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:19:15,641 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:19:15,642 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:19:15,643 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:19:15,643 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:19:15,644 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:19:15,644 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:19:15,644 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:19:15,645 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:19:15,645 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:19:15,645 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:19:15,646 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:19:15,646 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:19:15,646 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:19:15,647 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:19:15,647 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:19:15,647 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_10a362f7-d808-4521-ad06-0bf8dc6d38e0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a362f7-d808-4521-ad06-0bf8dc6d38e0/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 22315e954f625a92454f179210263631b555d33fa4f07d11e85c64617a347172 [2022-11-03 02:19:15,956 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:19:15,987 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:19:15,991 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:19:15,992 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:19:15,993 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:19:15,994 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a362f7-d808-4521-ad06-0bf8dc6d38e0/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/combinations/Problem05_label49+token_ring.05.cil-2.c [2022-11-03 02:19:16,085 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a362f7-d808-4521-ad06-0bf8dc6d38e0/bin/utaipan-7li7fVZpFI/data/577326464/6f715fc2e795402d809569d42174a68a/FLAGc099771f7 [2022-11-03 02:19:17,249 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:19:17,250 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a362f7-d808-4521-ad06-0bf8dc6d38e0/sv-benchmarks/c/combinations/Problem05_label49+token_ring.05.cil-2.c [2022-11-03 02:19:17,310 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a362f7-d808-4521-ad06-0bf8dc6d38e0/bin/utaipan-7li7fVZpFI/data/577326464/6f715fc2e795402d809569d42174a68a/FLAGc099771f7 [2022-11-03 02:19:17,459 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a362f7-d808-4521-ad06-0bf8dc6d38e0/bin/utaipan-7li7fVZpFI/data/577326464/6f715fc2e795402d809569d42174a68a [2022-11-03 02:19:17,462 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:19:17,465 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:19:17,469 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:19:17,469 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:19:17,473 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:19:17,474 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:19:17" (1/1) ... [2022-11-03 02:19:17,476 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16784050 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:19:17, skipping insertion in model container [2022-11-03 02:19:17,477 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:19:17" (1/1) ... [2022-11-03 02:19:17,485 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:19:17,807 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:19:20,898 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_10a362f7-d808-4521-ad06-0bf8dc6d38e0/sv-benchmarks/c/combinations/Problem05_label49+token_ring.05.cil-2.c[380593,380606] [2022-11-03 02:19:20,934 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_10a362f7-d808-4521-ad06-0bf8dc6d38e0/sv-benchmarks/c/combinations/Problem05_label49+token_ring.05.cil-2.c[383339,383352] [2022-11-03 02:19:21,275 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:19:21,289 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:19:22,864 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_10a362f7-d808-4521-ad06-0bf8dc6d38e0/sv-benchmarks/c/combinations/Problem05_label49+token_ring.05.cil-2.c[380593,380606] [2022-11-03 02:19:22,872 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_10a362f7-d808-4521-ad06-0bf8dc6d38e0/sv-benchmarks/c/combinations/Problem05_label49+token_ring.05.cil-2.c[383339,383352] [2022-11-03 02:19:22,899 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:19:22,971 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:19:22,972 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:19:22 WrapperNode [2022-11-03 02:19:22,972 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:19:22,973 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:19:22,973 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:19:22,973 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:19:22,983 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:19:22" (1/1) ... [2022-11-03 02:19:23,086 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:19:22" (1/1) ... [2022-11-03 02:19:23,515 INFO L138 Inliner]: procedures = 54, calls = 57, calls flagged for inlining = 31, calls inlined = 31, statements flattened = 12798 [2022-11-03 02:19:23,516 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:19:23,516 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:19:23,517 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:19:23,517 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:19:23,529 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:19:22" (1/1) ... [2022-11-03 02:19:23,529 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:19:22" (1/1) ... [2022-11-03 02:19:23,720 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:19:22" (1/1) ... [2022-11-03 02:19:23,732 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:19:22" (1/1) ... [2022-11-03 02:19:23,938 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:19:22" (1/1) ... [2022-11-03 02:19:24,092 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:19:22" (1/1) ... [2022-11-03 02:19:24,126 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:19:22" (1/1) ... [2022-11-03 02:19:24,151 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:19:22" (1/1) ... [2022-11-03 02:19:24,215 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:19:24,216 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:19:24,217 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:19:24,217 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:19:24,218 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:19:22" (1/1) ... [2022-11-03 02:19:24,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:19:24,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a362f7-d808-4521-ad06-0bf8dc6d38e0/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:19:24,257 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a362f7-d808-4521-ad06-0bf8dc6d38e0/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:19:24,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a362f7-d808-4521-ad06-0bf8dc6d38e0/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:19:24,319 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:19:24,319 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-11-03 02:19:24,320 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-11-03 02:19:24,320 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-03 02:19:24,320 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-03 02:19:24,320 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-11-03 02:19:24,320 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-11-03 02:19:24,320 INFO L130 BoogieDeclarations]: Found specification of procedure error [2022-11-03 02:19:24,321 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2022-11-03 02:19:24,321 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-11-03 02:19:24,321 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-11-03 02:19:24,321 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-11-03 02:19:24,321 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-11-03 02:19:24,321 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-11-03 02:19:24,321 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-11-03 02:19:24,322 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:19:24,322 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:19:24,322 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:19:24,465 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:19:24,468 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:19:35,530 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:19:38,533 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:19:38,534 INFO L300 CfgBuilder]: Removed 9 assume(true) statements. [2022-11-03 02:19:38,542 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:19:38 BoogieIcfgContainer [2022-11-03 02:19:38,542 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:19:38,546 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:19:38,547 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:19:38,551 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:19:38,551 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:19:17" (1/3) ... [2022-11-03 02:19:38,552 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f452489 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:19:38, skipping insertion in model container [2022-11-03 02:19:38,552 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:19:22" (2/3) ... [2022-11-03 02:19:38,553 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f452489 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:19:38, skipping insertion in model container [2022-11-03 02:19:38,553 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:19:38" (3/3) ... [2022-11-03 02:19:38,555 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label49+token_ring.05.cil-2.c [2022-11-03 02:19:38,578 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:19:38,578 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-03 02:19:38,675 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:19:38,688 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;@770ec2c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:19:38,689 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-03 02:19:38,702 INFO L276 IsEmpty]: Start isEmpty. Operand has 1760 states, 1729 states have (on average 1.9705031810294968) internal successors, (3407), 1734 states have internal predecessors, (3407), 21 states have call successors, (21), 7 states have call predecessors, (21), 7 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2022-11-03 02:19:38,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-03 02:19:38,724 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:19:38,725 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:19:38,726 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:19:38,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:19:38,737 INFO L85 PathProgramCache]: Analyzing trace with hash 151883147, now seen corresponding path program 1 times [2022-11-03 02:19:38,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:19:38,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47387701] [2022-11-03 02:19:38,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:19:38,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:19:38,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:19:39,340 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 02:19:39,341 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:19:39,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47387701] [2022-11-03 02:19:39,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47387701] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:19:39,343 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:19:39,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:19:39,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878694638] [2022-11-03 02:19:39,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:19:39,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:19:39,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:19:39,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:19:39,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:19:39,405 INFO L87 Difference]: Start difference. First operand has 1760 states, 1729 states have (on average 1.9705031810294968) internal successors, (3407), 1734 states have internal predecessors, (3407), 21 states have call successors, (21), 7 states have call predecessors, (21), 7 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 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 02:19:40,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:19:40,728 INFO L93 Difference]: Finished difference Result 3613 states and 7055 transitions. [2022-11-03 02:19:40,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:19:40,732 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 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 47 [2022-11-03 02:19:40,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:19:40,757 INFO L225 Difference]: With dead ends: 3613 [2022-11-03 02:19:40,757 INFO L226 Difference]: Without dead ends: 1852 [2022-11-03 02:19:40,768 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 02:19:40,772 INFO L413 NwaCegarLoop]: 3308 mSDtfsCounter, 3556 mSDsluCounter, 3503 mSDsCounter, 0 mSdLazyCounter, 618 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3556 SdHoareTripleChecker+Valid, 6544 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:19:40,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3556 Valid, 6544 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 618 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-03 02:19:40,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1852 states. [2022-11-03 02:19:40,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1852 to 1851. [2022-11-03 02:19:40,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1851 states, 1801 states have (on average 1.9444752915047196) internal successors, (3502), 1805 states have internal predecessors, (3502), 36 states have call successors, (36), 13 states have call predecessors, (36), 12 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) [2022-11-03 02:19:40,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1851 states to 1851 states and 3572 transitions. [2022-11-03 02:19:40,952 INFO L78 Accepts]: Start accepts. Automaton has 1851 states and 3572 transitions. Word has length 47 [2022-11-03 02:19:40,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:19:40,953 INFO L495 AbstractCegarLoop]: Abstraction has 1851 states and 3572 transitions. [2022-11-03 02:19:40,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 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 02:19:40,954 INFO L276 IsEmpty]: Start isEmpty. Operand 1851 states and 3572 transitions. [2022-11-03 02:19:40,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-03 02:19:40,960 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:19:40,961 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:19:40,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:19:40,961 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:19:40,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:19:40,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1724696445, now seen corresponding path program 1 times [2022-11-03 02:19:40,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:19:40,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709970467] [2022-11-03 02:19:40,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:19:40,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:19:40,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:19:41,290 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:19:41,291 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:19:41,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709970467] [2022-11-03 02:19:41,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709970467] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:19:41,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67436468] [2022-11-03 02:19:41,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:19:41,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:19:41,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a362f7-d808-4521-ad06-0bf8dc6d38e0/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:19:41,304 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a362f7-d808-4521-ad06-0bf8dc6d38e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:19:41,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a362f7-d808-4521-ad06-0bf8dc6d38e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:19:41,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:19:41,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:19:41,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:19:41,652 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 02:19:41,652 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:19:41,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67436468] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:19:41,653 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:19:41,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 02:19:41,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944570212] [2022-11-03 02:19:41,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:19:41,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:19:41,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:19:41,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:19:41,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:19:41,658 INFO L87 Difference]: Start difference. First operand 1851 states and 3572 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 states have internal predecessors, (54), 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 02:19:42,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:19:42,319 INFO L93 Difference]: Finished difference Result 2254 states and 4169 transitions. [2022-11-03 02:19:42,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:19:42,320 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 states have internal predecessors, (54), 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 88 [2022-11-03 02:19:42,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:19:42,338 INFO L225 Difference]: With dead ends: 2254 [2022-11-03 02:19:42,339 INFO L226 Difference]: Without dead ends: 2049 [2022-11-03 02:19:42,342 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 88 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 02:19:42,343 INFO L413 NwaCegarLoop]: 3238 mSDtfsCounter, 3410 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3410 SdHoareTripleChecker+Valid, 3365 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:19:42,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3410 Valid, 3365 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 02:19:42,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2049 states. [2022-11-03 02:19:42,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2049 to 2043. [2022-11-03 02:19:42,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2043 states, 1953 states have (on average 1.905273937532002) internal successors, (3721), 1958 states have internal predecessors, (3721), 64 states have call successors, (64), 25 states have call predecessors, (64), 24 states have return successors, (62), 60 states have call predecessors, (62), 62 states have call successors, (62) [2022-11-03 02:19:42,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2043 states to 2043 states and 3847 transitions. [2022-11-03 02:19:42,471 INFO L78 Accepts]: Start accepts. Automaton has 2043 states and 3847 transitions. Word has length 88 [2022-11-03 02:19:42,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:19:42,471 INFO L495 AbstractCegarLoop]: Abstraction has 2043 states and 3847 transitions. [2022-11-03 02:19:42,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 states have internal predecessors, (54), 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 02:19:42,472 INFO L276 IsEmpty]: Start isEmpty. Operand 2043 states and 3847 transitions. [2022-11-03 02:19:42,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-03 02:19:42,487 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:19:42,488 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:19:42,697 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a362f7-d808-4521-ad06-0bf8dc6d38e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:19:42,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a362f7-d808-4521-ad06-0bf8dc6d38e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:19:42,702 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:19:42,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:19:42,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1666398725, now seen corresponding path program 1 times [2022-11-03 02:19:42,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:19:42,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323506134] [2022-11-03 02:19:42,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:19:42,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:19:42,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:19:42,982 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:19:42,983 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:19:42,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323506134] [2022-11-03 02:19:42,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323506134] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:19:42,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465804133] [2022-11-03 02:19:42,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:19:42,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:19:42,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a362f7-d808-4521-ad06-0bf8dc6d38e0/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:19:42,986 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a362f7-d808-4521-ad06-0bf8dc6d38e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:19:43,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a362f7-d808-4521-ad06-0bf8dc6d38e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 02:19:43,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:19:43,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:19:43,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:19:43,362 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:19:43,363 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:19:43,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465804133] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:19:43,363 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:19:43,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 02:19:43,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758074748] [2022-11-03 02:19:43,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:19:43,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:19:43,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:19:43,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:19:43,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:19:43,367 INFO L87 Difference]: Start difference. First operand 2043 states and 3847 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 2 states have internal predecessors, (57), 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 02:19:44,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:19:44,057 INFO L93 Difference]: Finished difference Result 2824 states and 4998 transitions. [2022-11-03 02:19:44,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:19:44,058 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 2 states have internal predecessors, (57), 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 88 [2022-11-03 02:19:44,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:19:44,074 INFO L225 Difference]: With dead ends: 2824 [2022-11-03 02:19:44,074 INFO L226 Difference]: Without dead ends: 2427 [2022-11-03 02:19:44,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 88 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 02:19:44,079 INFO L413 NwaCegarLoop]: 3237 mSDtfsCounter, 3407 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3407 SdHoareTripleChecker+Valid, 3364 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:19:44,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3407 Valid, 3364 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 02:19:44,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2427 states. [2022-11-03 02:19:44,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2427 to 2419. [2022-11-03 02:19:44,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2419 states, 2251 states have (on average 1.842292314526877) internal successors, (4147), 2258 states have internal predecessors, (4147), 118 states have call successors, (118), 49 states have call predecessors, (118), 48 states have return successors, (116), 112 states have call predecessors, (116), 116 states have call successors, (116) [2022-11-03 02:19:44,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2419 states to 2419 states and 4381 transitions. [2022-11-03 02:19:44,218 INFO L78 Accepts]: Start accepts. Automaton has 2419 states and 4381 transitions. Word has length 88 [2022-11-03 02:19:44,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:19:44,219 INFO L495 AbstractCegarLoop]: Abstraction has 2419 states and 4381 transitions. [2022-11-03 02:19:44,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 2 states have internal predecessors, (57), 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 02:19:44,220 INFO L276 IsEmpty]: Start isEmpty. Operand 2419 states and 4381 transitions. [2022-11-03 02:19:44,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-03 02:19:44,224 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:19:44,225 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:19:44,274 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a362f7-d808-4521-ad06-0bf8dc6d38e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:19:44,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a362f7-d808-4521-ad06-0bf8dc6d38e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:19:44,444 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:19:44,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:19:44,445 INFO L85 PathProgramCache]: Analyzing trace with hash 128219075, now seen corresponding path program 1 times [2022-11-03 02:19:44,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:19:44,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068851414] [2022-11-03 02:19:44,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:19:44,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:19:44,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:19:44,625 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:19:44,626 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:19:44,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068851414] [2022-11-03 02:19:44,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068851414] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:19:44,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802361786] [2022-11-03 02:19:44,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:19:44,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:19:44,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a362f7-d808-4521-ad06-0bf8dc6d38e0/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:19:44,629 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a362f7-d808-4521-ad06-0bf8dc6d38e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:19:44,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a362f7-d808-4521-ad06-0bf8dc6d38e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 02:19:44,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:19:44,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:19:44,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:19:44,922 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:19:44,923 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:19:44,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802361786] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:19:44,924 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:19:44,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 02:19:44,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563630349] [2022-11-03 02:19:44,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:19:44,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:19:44,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:19:44,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:19:44,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:19:44,934 INFO L87 Difference]: Start difference. First operand 2419 states and 4381 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 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 02:19:45,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:19:45,635 INFO L93 Difference]: Finished difference Result 3940 states and 6606 transitions. [2022-11-03 02:19:45,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:19:45,636 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 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 88 [2022-11-03 02:19:45,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:19:45,664 INFO L225 Difference]: With dead ends: 3940 [2022-11-03 02:19:45,665 INFO L226 Difference]: Without dead ends: 3167 [2022-11-03 02:19:45,672 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 88 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 02:19:45,677 INFO L413 NwaCegarLoop]: 3205 mSDtfsCounter, 3401 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3401 SdHoareTripleChecker+Valid, 3332 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:19:45,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3401 Valid, 3332 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 02:19:45,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3167 states. [2022-11-03 02:19:45,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3167 to 3155. [2022-11-03 02:19:45,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3155 states, 2835 states have (on average 1.7548500881834215) internal successors, (4975), 2846 states have internal predecessors, (4975), 222 states have call successors, (222), 97 states have call predecessors, (222), 96 states have return successors, (220), 212 states have call predecessors, (220), 220 states have call successors, (220) [2022-11-03 02:19:45,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3155 states to 3155 states and 5417 transitions. [2022-11-03 02:19:45,918 INFO L78 Accepts]: Start accepts. Automaton has 3155 states and 5417 transitions. Word has length 88 [2022-11-03 02:19:45,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:19:45,918 INFO L495 AbstractCegarLoop]: Abstraction has 3155 states and 5417 transitions. [2022-11-03 02:19:45,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 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 02:19:45,919 INFO L276 IsEmpty]: Start isEmpty. Operand 3155 states and 5417 transitions. [2022-11-03 02:19:45,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-03 02:19:45,928 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:19:45,928 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:19:45,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a362f7-d808-4521-ad06-0bf8dc6d38e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:19:46,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a362f7-d808-4521-ad06-0bf8dc6d38e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:19:46,144 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:19:46,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:19:46,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1708237823, now seen corresponding path program 1 times [2022-11-03 02:19:46,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:19:46,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583730115] [2022-11-03 02:19:46,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:19:46,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:19:46,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:19:46,267 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-03 02:19:46,268 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:19:46,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583730115] [2022-11-03 02:19:46,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583730115] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:19:46,268 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:19:46,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:19:46,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213257502] [2022-11-03 02:19:46,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:19:46,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:19:46,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:19:46,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:19:46,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:19:46,271 INFO L87 Difference]: Start difference. First operand 3155 states and 5417 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 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 02:19:47,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:19:47,092 INFO L93 Difference]: Finished difference Result 4335 states and 7148 transitions. [2022-11-03 02:19:47,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:19:47,093 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 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 88 [2022-11-03 02:19:47,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:19:47,114 INFO L225 Difference]: With dead ends: 4335 [2022-11-03 02:19:47,115 INFO L226 Difference]: Without dead ends: 3547 [2022-11-03 02:19:47,119 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 02:19:47,120 INFO L413 NwaCegarLoop]: 3259 mSDtfsCounter, 64 mSDsluCounter, 3433 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 6456 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:19:47,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 6456 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 02:19:47,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3547 states. [2022-11-03 02:19:47,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3547 to 3399. [2022-11-03 02:19:47,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3399 states, 3063 states have (on average 1.7495919033627163) internal successors, (5359), 3074 states have internal predecessors, (5359), 230 states have call successors, (230), 105 states have call predecessors, (230), 104 states have return successors, (228), 220 states have call predecessors, (228), 228 states have call successors, (228) [2022-11-03 02:19:47,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3399 states to 3399 states and 5817 transitions. [2022-11-03 02:19:47,326 INFO L78 Accepts]: Start accepts. Automaton has 3399 states and 5817 transitions. Word has length 88 [2022-11-03 02:19:47,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:19:47,327 INFO L495 AbstractCegarLoop]: Abstraction has 3399 states and 5817 transitions. [2022-11-03 02:19:47,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 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 02:19:47,327 INFO L276 IsEmpty]: Start isEmpty. Operand 3399 states and 5817 transitions. [2022-11-03 02:19:47,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-03 02:19:47,336 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:19:47,336 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:19:47,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 02:19:47,337 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:19:47,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:19:47,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1578454786, now seen corresponding path program 1 times [2022-11-03 02:19:47,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:19:47,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196782664] [2022-11-03 02:19:47,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:19:47,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:19:47,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:19:47,461 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-11-03 02:19:47,462 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:19:47,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196782664] [2022-11-03 02:19:47,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196782664] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:19:47,462 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:19:47,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:19:47,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052708954] [2022-11-03 02:19:47,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:19:47,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:19:47,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:19:47,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:19:47,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:19:47,465 INFO L87 Difference]: Start difference. First operand 3399 states and 5817 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (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 02:19:48,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:19:48,270 INFO L93 Difference]: Finished difference Result 6832 states and 10874 transitions. [2022-11-03 02:19:48,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:19:48,272 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (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 117 [2022-11-03 02:19:48,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:19:48,302 INFO L225 Difference]: With dead ends: 6832 [2022-11-03 02:19:48,303 INFO L226 Difference]: Without dead ends: 5079 [2022-11-03 02:19:48,312 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 02:19:48,316 INFO L413 NwaCegarLoop]: 3207 mSDtfsCounter, 3401 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3401 SdHoareTripleChecker+Valid, 3334 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 02:19:48,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3401 Valid, 3334 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 02:19:48,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5079 states. [2022-11-03 02:19:48,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5079 to 5051. [2022-11-03 02:19:48,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5051 states, 4403 states have (on average 1.6550079491255962) internal successors, (7287), 4422 states have internal predecessors, (7287), 438 states have call successors, (438), 209 states have call predecessors, (438), 208 states have return successors, (436), 420 states have call predecessors, (436), 436 states have call successors, (436) [2022-11-03 02:19:48,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5051 states to 5051 states and 8161 transitions. [2022-11-03 02:19:48,683 INFO L78 Accepts]: Start accepts. Automaton has 5051 states and 8161 transitions. Word has length 117 [2022-11-03 02:19:48,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:19:48,686 INFO L495 AbstractCegarLoop]: Abstraction has 5051 states and 8161 transitions. [2022-11-03 02:19:48,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (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 02:19:48,688 INFO L276 IsEmpty]: Start isEmpty. Operand 5051 states and 8161 transitions. [2022-11-03 02:19:48,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-03 02:19:48,702 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:19:48,702 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:19:48,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 02:19:48,704 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:19:48,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:19:48,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1106779769, now seen corresponding path program 1 times [2022-11-03 02:19:48,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:19:48,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412073103] [2022-11-03 02:19:48,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:19:48,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:19:48,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:19:48,845 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-11-03 02:19:48,846 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:19:48,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412073103] [2022-11-03 02:19:48,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412073103] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:19:48,847 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:19:48,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:19:48,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133506171] [2022-11-03 02:19:48,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:19:48,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:19:48,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:19:48,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:19:48,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:19:48,851 INFO L87 Difference]: Start difference. First operand 5051 states and 8161 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (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 02:19:49,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:19:49,864 INFO L93 Difference]: Finished difference Result 11716 states and 17866 transitions. [2022-11-03 02:19:49,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:19:49,866 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (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 117 [2022-11-03 02:19:49,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:19:49,946 INFO L225 Difference]: With dead ends: 11716 [2022-11-03 02:19:49,946 INFO L226 Difference]: Without dead ends: 8311 [2022-11-03 02:19:49,965 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 02:19:49,966 INFO L413 NwaCegarLoop]: 3228 mSDtfsCounter, 3404 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3404 SdHoareTripleChecker+Valid, 3355 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:19:49,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3404 Valid, 3355 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 02:19:49,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8311 states. [2022-11-03 02:19:50,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8311 to 8259. [2022-11-03 02:19:50,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8259 states, 7003 states have (on average 1.5683278594887906) internal successors, (10983), 7038 states have internal predecessors, (10983), 838 states have call successors, (838), 417 states have call predecessors, (838), 416 states have return successors, (836), 804 states have call predecessors, (836), 836 states have call successors, (836) [2022-11-03 02:19:50,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8259 states to 8259 states and 12657 transitions. [2022-11-03 02:19:50,659 INFO L78 Accepts]: Start accepts. Automaton has 8259 states and 12657 transitions. Word has length 117 [2022-11-03 02:19:50,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:19:50,659 INFO L495 AbstractCegarLoop]: Abstraction has 8259 states and 12657 transitions. [2022-11-03 02:19:50,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (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 02:19:50,660 INFO L276 IsEmpty]: Start isEmpty. Operand 8259 states and 12657 transitions. [2022-11-03 02:19:50,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-11-03 02:19:50,697 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:19:50,697 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 02:19:50,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-03 02:19:50,698 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:19:50,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:19:50,699 INFO L85 PathProgramCache]: Analyzing trace with hash -584797484, now seen corresponding path program 1 times [2022-11-03 02:19:50,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:19:50,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428926180] [2022-11-03 02:19:50,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:19:50,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:19:50,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:19:50,888 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-03 02:19:50,889 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:19:50,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428926180] [2022-11-03 02:19:50,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428926180] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:19:50,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969516810] [2022-11-03 02:19:50,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:19:50,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:19:50,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a362f7-d808-4521-ad06-0bf8dc6d38e0/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:19:50,892 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a362f7-d808-4521-ad06-0bf8dc6d38e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:19:50,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a362f7-d808-4521-ad06-0bf8dc6d38e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 02:19:51,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:19:51,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 742 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:19:51,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:19:51,188 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-03 02:19:51,191 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:19:51,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969516810] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:19:51,192 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:19:51,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-03 02:19:51,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585205580] [2022-11-03 02:19:51,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:19:51,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:19:51,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:19:51,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:19:51,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:19:51,196 INFO L87 Difference]: Start difference. First operand 8259 states and 12657 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 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 02:19:52,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:19:52,269 INFO L93 Difference]: Finished difference Result 14155 states and 21223 transitions. [2022-11-03 02:19:52,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:19:52,275 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 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 135 [2022-11-03 02:19:52,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:19:52,330 INFO L225 Difference]: With dead ends: 14155 [2022-11-03 02:19:52,330 INFO L226 Difference]: Without dead ends: 10775 [2022-11-03 02:19:52,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 135 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 02:19:52,346 INFO L413 NwaCegarLoop]: 3283 mSDtfsCounter, 103 mSDsluCounter, 3434 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 6482 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:19:52,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 6482 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 02:19:52,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10775 states. [2022-11-03 02:19:52,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10775 to 9491. [2022-11-03 02:19:52,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9491 states, 8139 states have (on average 1.5794323626981202) internal successors, (12855), 8174 states have internal predecessors, (12855), 886 states have call successors, (886), 465 states have call predecessors, (886), 464 states have return successors, (884), 852 states have call predecessors, (884), 884 states have call successors, (884) [2022-11-03 02:19:52,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9491 states to 9491 states and 14625 transitions. [2022-11-03 02:19:52,915 INFO L78 Accepts]: Start accepts. Automaton has 9491 states and 14625 transitions. Word has length 135 [2022-11-03 02:19:52,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:19:52,917 INFO L495 AbstractCegarLoop]: Abstraction has 9491 states and 14625 transitions. [2022-11-03 02:19:52,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 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 02:19:52,918 INFO L276 IsEmpty]: Start isEmpty. Operand 9491 states and 14625 transitions. [2022-11-03 02:19:52,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-11-03 02:19:52,949 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:19:52,949 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 02:19:52,996 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a362f7-d808-4521-ad06-0bf8dc6d38e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:19:53,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a362f7-d808-4521-ad06-0bf8dc6d38e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-03 02:19:53,176 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:19:53,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:19:53,177 INFO L85 PathProgramCache]: Analyzing trace with hash 606227871, now seen corresponding path program 2 times [2022-11-03 02:19:53,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:19:53,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284382309] [2022-11-03 02:19:53,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:19:53,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:19:53,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:19:53,651 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 10 proven. 37 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-03 02:19:53,652 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:19:53,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284382309] [2022-11-03 02:19:53,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284382309] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:19:53,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229774602] [2022-11-03 02:19:53,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:19:53,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:19:53,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a362f7-d808-4521-ad06-0bf8dc6d38e0/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:19:53,654 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a362f7-d808-4521-ad06-0bf8dc6d38e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:19:53,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10a362f7-d808-4521-ad06-0bf8dc6d38e0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 02:19:53,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 02:19:53,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:19:53,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 697 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 02:19:53,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:19:54,179 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 62 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:19:54,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:19:54,780 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 19 proven. 40 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-03 02:19:54,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229774602] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:19:54,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [843015245] [2022-11-03 02:19:54,809 INFO L159 IcfgInterpreter]: Started Sifa with 71 locations of interest [2022-11-03 02:19:54,809 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:19:54,813 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:19:54,820 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:19:54,821 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:20:25,156 INFO L197 IcfgInterpreter]: Interpreting procedure error with input of size 78 for LOIs [2022-11-03 02:20:25,166 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 157 for LOIs [2022-11-03 02:20:25,220 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2022-11-03 02:20:33,349 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 12