./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label49+token_ring.11.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fcf88d-674a-496e-b33b-e1d80ad128b6/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fcf88d-674a-496e-b33b-e1d80ad128b6/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_89fcf88d-674a-496e-b33b-e1d80ad128b6/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fcf88d-674a-496e-b33b-e1d80ad128b6/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label49+token_ring.11.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fcf88d-674a-496e-b33b-e1d80ad128b6/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_89fcf88d-674a-496e-b33b-e1d80ad128b6/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 baa3d7d596cfacd752b448b2d94171196ab29c96dae98d968ce044a2cc25c48f --- 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 02:21:48,459 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:21:48,461 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:21:48,515 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:21:48,516 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:21:48,520 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:21:48,523 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:21:48,527 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:21:48,529 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:21:48,535 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:21:48,537 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:21:48,544 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:21:48,545 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:21:48,548 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:21:48,549 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:21:48,551 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:21:48,556 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:21:48,557 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:21:48,559 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:21:48,564 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:21:48,568 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:21:48,570 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:21:48,573 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:21:48,574 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:21:48,580 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:21:48,585 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:21:48,585 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:21:48,586 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:21:48,587 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:21:48,588 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:21:48,589 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:21:48,590 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:21:48,592 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:21:48,594 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:21:48,595 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:21:48,596 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:21:48,597 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:21:48,597 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:21:48,597 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:21:48,598 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:21:48,599 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:21:48,600 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fcf88d-674a-496e-b33b-e1d80ad128b6/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 02:21:48,634 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:21:48,638 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:21:48,639 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:21:48,639 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:21:48,640 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:21:48,640 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:21:48,641 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:21:48,641 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:21:48,641 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:21:48,641 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:21:48,642 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:21:48,642 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:21:48,643 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:21:48,643 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:21:48,643 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:21:48,643 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:21:48,644 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:21:48,644 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:21:48,645 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:21:48,645 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:21:48,645 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:21:48,645 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:21:48,645 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:21:48,646 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:21:48,646 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:21:48,646 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:21:48,646 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:21:48,648 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:21:48,648 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:21:48,648 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:21:48,649 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:21:48,649 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:21:48,649 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:21:48,649 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:21:48,650 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:21:48,650 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:21:48,651 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:21:48,651 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:21:48,651 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:21:48,651 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:21:48,652 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:21:48,652 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_89fcf88d-674a-496e-b33b-e1d80ad128b6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fcf88d-674a-496e-b33b-e1d80ad128b6/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> baa3d7d596cfacd752b448b2d94171196ab29c96dae98d968ce044a2cc25c48f [2022-11-03 02:21:48,924 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:21:48,946 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:21:48,949 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:21:48,962 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:21:48,963 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:21:48,965 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fcf88d-674a-496e-b33b-e1d80ad128b6/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/combinations/Problem05_label49+token_ring.11.cil-1.c [2022-11-03 02:21:49,032 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fcf88d-674a-496e-b33b-e1d80ad128b6/bin/utaipan-7li7fVZpFI/data/09f27c747/cb17dfd203c1419c8b47784ca39a0b54/FLAGd7135951f [2022-11-03 02:21:50,214 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:21:50,216 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fcf88d-674a-496e-b33b-e1d80ad128b6/sv-benchmarks/c/combinations/Problem05_label49+token_ring.11.cil-1.c [2022-11-03 02:21:50,285 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fcf88d-674a-496e-b33b-e1d80ad128b6/bin/utaipan-7li7fVZpFI/data/09f27c747/cb17dfd203c1419c8b47784ca39a0b54/FLAGd7135951f [2022-11-03 02:21:50,430 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fcf88d-674a-496e-b33b-e1d80ad128b6/bin/utaipan-7li7fVZpFI/data/09f27c747/cb17dfd203c1419c8b47784ca39a0b54 [2022-11-03 02:21:50,432 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:21:50,435 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:21:50,441 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:21:50,441 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:21:50,445 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:21:50,447 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:21:50" (1/1) ... [2022-11-03 02:21:50,448 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d1fb37f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:21:50, skipping insertion in model container [2022-11-03 02:21:50,448 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:21:50" (1/1) ... [2022-11-03 02:21:50,456 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:21:50,729 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:21:53,173 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_89fcf88d-674a-496e-b33b-e1d80ad128b6/sv-benchmarks/c/combinations/Problem05_label49+token_ring.11.cil-1.c[380593,380606] [2022-11-03 02:21:53,205 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_89fcf88d-674a-496e-b33b-e1d80ad128b6/sv-benchmarks/c/combinations/Problem05_label49+token_ring.11.cil-1.c[383339,383352] [2022-11-03 02:21:53,541 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:21:53,554 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:21:54,854 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_89fcf88d-674a-496e-b33b-e1d80ad128b6/sv-benchmarks/c/combinations/Problem05_label49+token_ring.11.cil-1.c[380593,380606] [2022-11-03 02:21:54,860 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_89fcf88d-674a-496e-b33b-e1d80ad128b6/sv-benchmarks/c/combinations/Problem05_label49+token_ring.11.cil-1.c[383339,383352] [2022-11-03 02:21:54,903 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:21:54,973 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:21:54,974 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:21:54 WrapperNode [2022-11-03 02:21:54,974 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:21:54,975 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:21:54,975 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:21:54,975 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:21:54,983 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:21:54" (1/1) ... [2022-11-03 02:21:55,087 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:21:54" (1/1) ... [2022-11-03 02:21:55,540 INFO L138 Inliner]: procedures = 66, calls = 75, calls flagged for inlining = 43, calls inlined = 43, statements flattened = 13146 [2022-11-03 02:21:55,541 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:21:55,542 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:21:55,542 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:21:55,542 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:21:55,552 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:21:54" (1/1) ... [2022-11-03 02:21:55,553 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:21:54" (1/1) ... [2022-11-03 02:21:55,615 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:21:54" (1/1) ... [2022-11-03 02:21:55,616 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:21:54" (1/1) ... [2022-11-03 02:21:55,902 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:21:54" (1/1) ... [2022-11-03 02:21:55,952 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:21:54" (1/1) ... [2022-11-03 02:21:56,028 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:21:54" (1/1) ... [2022-11-03 02:21:56,066 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:21:54" (1/1) ... [2022-11-03 02:21:56,195 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:21:56,197 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:21:56,197 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:21:56,197 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:21:56,203 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:21:54" (1/1) ... [2022-11-03 02:21:56,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:21:56,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fcf88d-674a-496e-b33b-e1d80ad128b6/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:21:56,288 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fcf88d-674a-496e-b33b-e1d80ad128b6/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:21:56,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fcf88d-674a-496e-b33b-e1d80ad128b6/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:21:56,419 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:21:56,419 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-11-03 02:21:56,420 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-11-03 02:21:56,420 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-03 02:21:56,420 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-03 02:21:56,429 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-11-03 02:21:56,429 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-11-03 02:21:56,429 INFO L130 BoogieDeclarations]: Found specification of procedure error [2022-11-03 02:21:56,430 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2022-11-03 02:21:56,430 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-11-03 02:21:56,430 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-11-03 02:21:56,430 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-11-03 02:21:56,431 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-11-03 02:21:56,432 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-11-03 02:21:56,432 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-11-03 02:21:56,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:21:56,447 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:21:56,447 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:21:56,622 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:21:56,625 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:22:05,250 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:22:08,123 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:22:08,123 INFO L300 CfgBuilder]: Removed 15 assume(true) statements. [2022-11-03 02:22:08,128 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:22:08 BoogieIcfgContainer [2022-11-03 02:22:08,128 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:22:08,131 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:22:08,131 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:22:08,135 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:22:08,135 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:21:50" (1/3) ... [2022-11-03 02:22:08,136 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59e09287 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:22:08, skipping insertion in model container [2022-11-03 02:22:08,136 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:21:54" (2/3) ... [2022-11-03 02:22:08,136 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59e09287 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:22:08, skipping insertion in model container [2022-11-03 02:22:08,137 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:22:08" (3/3) ... [2022-11-03 02:22:08,138 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label49+token_ring.11.cil-1.c [2022-11-03 02:22:08,157 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:22:08,157 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-03 02:22:08,247 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:22:08,253 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;@79869e4e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:22:08,254 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-03 02:22:08,265 INFO L276 IsEmpty]: Start isEmpty. Operand has 1826 states, 1789 states have (on average 1.9580771380659587) internal successors, (3503), 1794 states have internal predecessors, (3503), 27 states have call successors, (27), 7 states have call predecessors, (27), 7 states have return successors, (27), 26 states have call predecessors, (27), 27 states have call successors, (27) [2022-11-03 02:22:08,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-03 02:22:08,277 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:22:08,278 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:22:08,279 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:22:08,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:22:08,284 INFO L85 PathProgramCache]: Analyzing trace with hash 169745087, now seen corresponding path program 1 times [2022-11-03 02:22:08,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:22:08,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188821972] [2022-11-03 02:22:08,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:22:08,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:22:08,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:22:08,827 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 02:22:08,827 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:22:08,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188821972] [2022-11-03 02:22:08,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188821972] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:22:08,829 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:22:08,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:22:08,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679044497] [2022-11-03 02:22:08,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:22:08,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:22:08,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:22:08,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:22:08,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:22:08,882 INFO L87 Difference]: Start difference. First operand has 1826 states, 1789 states have (on average 1.9580771380659587) internal successors, (3503), 1794 states have internal predecessors, (3503), 27 states have call successors, (27), 7 states have call predecessors, (27), 7 states have return successors, (27), 26 states have call predecessors, (27), 27 states have call successors, (27) Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 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 02:22:10,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:22:10,110 INFO L93 Difference]: Finished difference Result 3811 states and 7391 transitions. [2022-11-03 02:22:10,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:22:10,114 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 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 65 [2022-11-03 02:22:10,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:22:10,140 INFO L225 Difference]: With dead ends: 3811 [2022-11-03 02:22:10,140 INFO L226 Difference]: Without dead ends: 1984 [2022-11-03 02:22:10,151 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 02:22:10,157 INFO L413 NwaCegarLoop]: 3488 mSDtfsCounter, 3754 mSDsluCounter, 3695 mSDsCounter, 0 mSdLazyCounter, 714 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3754 SdHoareTripleChecker+Valid, 6880 SdHoareTripleChecker+Invalid, 728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:22:10,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3754 Valid, 6880 Invalid, 728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 714 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-03 02:22:10,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1984 states. [2022-11-03 02:22:10,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1984 to 1983. [2022-11-03 02:22:10,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1983 states, 1921 states have (on average 1.9229567933368037) internal successors, (3694), 1925 states have internal predecessors, (3694), 48 states have call successors, (48), 13 states have call predecessors, (48), 12 states have return successors, (46), 45 states have call predecessors, (46), 46 states have call successors, (46) [2022-11-03 02:22:10,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1983 states to 1983 states and 3788 transitions. [2022-11-03 02:22:10,335 INFO L78 Accepts]: Start accepts. Automaton has 1983 states and 3788 transitions. Word has length 65 [2022-11-03 02:22:10,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:22:10,337 INFO L495 AbstractCegarLoop]: Abstraction has 1983 states and 3788 transitions. [2022-11-03 02:22:10,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 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 02:22:10,337 INFO L276 IsEmpty]: Start isEmpty. Operand 1983 states and 3788 transitions. [2022-11-03 02:22:10,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-03 02:22:10,353 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:22:10,353 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:22:10,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:22:10,354 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:22:10,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:22:10,359 INFO L85 PathProgramCache]: Analyzing trace with hash -107083479, now seen corresponding path program 1 times [2022-11-03 02:22:10,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:22:10,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524650715] [2022-11-03 02:22:10,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:22:10,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:22:10,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:22:10,765 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:22:10,766 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:22:10,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524650715] [2022-11-03 02:22:10,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524650715] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:22:10,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832293637] [2022-11-03 02:22:10,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:22:10,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:22:10,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fcf88d-674a-496e-b33b-e1d80ad128b6/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:22:10,775 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fcf88d-674a-496e-b33b-e1d80ad128b6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:22:10,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fcf88d-674a-496e-b33b-e1d80ad128b6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:22:11,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:22:11,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 985 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:22:11,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:22:11,182 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:22:11,182 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:22:11,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832293637] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:22:11,185 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:22:11,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 02:22:11,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189373451] [2022-11-03 02:22:11,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:22:11,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:22:11,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:22:11,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:22:11,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:22:11,188 INFO L87 Difference]: Start difference. First operand 1983 states and 3788 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 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 02:22:11,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:22:11,783 INFO L93 Difference]: Finished difference Result 2650 states and 4829 transitions. [2022-11-03 02:22:11,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:22:11,785 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 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 130 [2022-11-03 02:22:11,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:22:11,800 INFO L225 Difference]: With dead ends: 2650 [2022-11-03 02:22:11,801 INFO L226 Difference]: Without dead ends: 2313 [2022-11-03 02:22:11,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 130 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 02:22:11,805 INFO L413 NwaCegarLoop]: 3340 mSDtfsCounter, 3497 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3497 SdHoareTripleChecker+Valid, 3557 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:22:11,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3497 Valid, 3557 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 02:22:11,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2313 states. [2022-11-03 02:22:11,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2313 to 2307. [2022-11-03 02:22:11,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2307 states, 2193 states have (on average 1.8718650250797995) internal successors, (4105), 2198 states have internal predecessors, (4105), 88 states have call successors, (88), 25 states have call predecessors, (88), 24 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2022-11-03 02:22:11,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2307 states to 2307 states and 4279 transitions. [2022-11-03 02:22:11,914 INFO L78 Accepts]: Start accepts. Automaton has 2307 states and 4279 transitions. Word has length 130 [2022-11-03 02:22:11,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:22:11,915 INFO L495 AbstractCegarLoop]: Abstraction has 2307 states and 4279 transitions. [2022-11-03 02:22:11,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 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 02:22:11,916 INFO L276 IsEmpty]: Start isEmpty. Operand 2307 states and 4279 transitions. [2022-11-03 02:22:11,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-03 02:22:11,926 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:22:11,926 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:22:11,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fcf88d-674a-496e-b33b-e1d80ad128b6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:22:12,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fcf88d-674a-496e-b33b-e1d80ad128b6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:22:12,135 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:22:12,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:22:12,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1210292569, now seen corresponding path program 1 times [2022-11-03 02:22:12,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:22:12,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229381861] [2022-11-03 02:22:12,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:22:12,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:22:12,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:22:12,389 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:22:12,389 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:22:12,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229381861] [2022-11-03 02:22:12,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229381861] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:22:12,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710180935] [2022-11-03 02:22:12,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:22:12,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:22:12,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fcf88d-674a-496e-b33b-e1d80ad128b6/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:22:12,399 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fcf88d-674a-496e-b33b-e1d80ad128b6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:22:12,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fcf88d-674a-496e-b33b-e1d80ad128b6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 02:22:12,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:22:12,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 979 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:22:12,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:22:12,721 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 02:22:12,721 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:22:12,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710180935] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:22:12,722 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:22:12,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 02:22:12,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115290074] [2022-11-03 02:22:12,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:22:12,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:22:12,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:22:12,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:22:12,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:22:12,724 INFO L87 Difference]: Start difference. First operand 2307 states and 4279 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 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 02:22:13,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:22:13,285 INFO L93 Difference]: Finished difference Result 3616 states and 6318 transitions. [2022-11-03 02:22:13,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:22:13,287 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 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 130 [2022-11-03 02:22:13,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:22:13,308 INFO L225 Difference]: With dead ends: 3616 [2022-11-03 02:22:13,308 INFO L226 Difference]: Without dead ends: 2955 [2022-11-03 02:22:13,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 130 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 02:22:13,317 INFO L413 NwaCegarLoop]: 3339 mSDtfsCounter, 3509 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3509 SdHoareTripleChecker+Valid, 3556 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:22:13,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3509 Valid, 3556 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 02:22:13,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2955 states. [2022-11-03 02:22:13,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2955 to 2947. [2022-11-03 02:22:13,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2947 states, 2731 states have (on average 1.7997070670084219) internal successors, (4915), 2738 states have internal predecessors, (4915), 166 states have call successors, (166), 49 states have call predecessors, (166), 48 states have return successors, (164), 160 states have call predecessors, (164), 164 states have call successors, (164) [2022-11-03 02:22:13,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2947 states to 2947 states and 5245 transitions. [2022-11-03 02:22:13,457 INFO L78 Accepts]: Start accepts. Automaton has 2947 states and 5245 transitions. Word has length 130 [2022-11-03 02:22:13,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:22:13,458 INFO L495 AbstractCegarLoop]: Abstraction has 2947 states and 5245 transitions. [2022-11-03 02:22:13,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 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 02:22:13,459 INFO L276 IsEmpty]: Start isEmpty. Operand 2947 states and 5245 transitions. [2022-11-03 02:22:13,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-03 02:22:13,465 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:22:13,465 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:22:13,512 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fcf88d-674a-496e-b33b-e1d80ad128b6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:22:13,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fcf88d-674a-496e-b33b-e1d80ad128b6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:22:13,679 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:22:13,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:22:13,680 INFO L85 PathProgramCache]: Analyzing trace with hash 116684581, now seen corresponding path program 1 times [2022-11-03 02:22:13,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:22:13,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357175487] [2022-11-03 02:22:13,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:22:13,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:22:13,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:22:13,929 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:22:13,929 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:22:13,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357175487] [2022-11-03 02:22:13,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357175487] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:22:13,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312853925] [2022-11-03 02:22:13,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:22:13,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:22:13,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fcf88d-674a-496e-b33b-e1d80ad128b6/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:22:13,932 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fcf88d-674a-496e-b33b-e1d80ad128b6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:22:13,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fcf88d-674a-496e-b33b-e1d80ad128b6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 02:22:14,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:22:14,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 973 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:22:14,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:22:14,299 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:22:14,300 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:22:14,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312853925] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:22:14,300 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:22:14,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 02:22:14,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603365957] [2022-11-03 02:22:14,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:22:14,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:22:14,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:22:14,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:22:14,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:22:14,309 INFO L87 Difference]: Start difference. First operand 2947 states and 5245 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 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 02:22:14,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:22:14,933 INFO L93 Difference]: Finished difference Result 5524 states and 9246 transitions. [2022-11-03 02:22:14,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:22:14,934 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 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 130 [2022-11-03 02:22:14,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:22:14,953 INFO L225 Difference]: With dead ends: 5524 [2022-11-03 02:22:14,953 INFO L226 Difference]: Without dead ends: 4223 [2022-11-03 02:22:14,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 130 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 02:22:14,959 INFO L413 NwaCegarLoop]: 3301 mSDtfsCounter, 3491 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3491 SdHoareTripleChecker+Valid, 3518 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:22:14,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3491 Valid, 3518 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 02:22:14,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4223 states. [2022-11-03 02:22:15,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4223 to 4211. [2022-11-03 02:22:15,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4211 states, 3795 states have (on average 1.7156785243741766) internal successors, (6511), 3806 states have internal predecessors, (6511), 318 states have call successors, (318), 97 states have call predecessors, (318), 96 states have return successors, (316), 308 states have call predecessors, (316), 316 states have call successors, (316) [2022-11-03 02:22:15,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4211 states to 4211 states and 7145 transitions. [2022-11-03 02:22:15,127 INFO L78 Accepts]: Start accepts. Automaton has 4211 states and 7145 transitions. Word has length 130 [2022-11-03 02:22:15,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:22:15,128 INFO L495 AbstractCegarLoop]: Abstraction has 4211 states and 7145 transitions. [2022-11-03 02:22:15,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 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 02:22:15,128 INFO L276 IsEmpty]: Start isEmpty. Operand 4211 states and 7145 transitions. [2022-11-03 02:22:15,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-03 02:22:15,135 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:22:15,135 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:22:15,175 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fcf88d-674a-496e-b33b-e1d80ad128b6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:22:15,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fcf88d-674a-496e-b33b-e1d80ad128b6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:22:15,335 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:22:15,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:22:15,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1957579555, now seen corresponding path program 1 times [2022-11-03 02:22:15,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:22:15,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625286922] [2022-11-03 02:22:15,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:22:15,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:22:15,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:22:15,541 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:22:15,542 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:22:15,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625286922] [2022-11-03 02:22:15,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625286922] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:22:15,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235323224] [2022-11-03 02:22:15,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:22:15,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:22:15,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fcf88d-674a-496e-b33b-e1d80ad128b6/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:22:15,544 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fcf88d-674a-496e-b33b-e1d80ad128b6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:22:15,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fcf88d-674a-496e-b33b-e1d80ad128b6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 02:22:15,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:22:15,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 967 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:22:15,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:22:15,834 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-03 02:22:15,834 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:22:15,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235323224] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:22:15,834 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:22:15,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 02:22:15,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817451263] [2022-11-03 02:22:15,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:22:15,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:22:15,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:22:15,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:22:15,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:22:15,837 INFO L87 Difference]: Start difference. First operand 4211 states and 7145 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 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 02:22:16,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:22:16,569 INFO L93 Difference]: Finished difference Result 9292 states and 15002 transitions. [2022-11-03 02:22:16,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:22:16,570 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 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 130 [2022-11-03 02:22:16,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:22:16,602 INFO L225 Difference]: With dead ends: 9292 [2022-11-03 02:22:16,602 INFO L226 Difference]: Without dead ends: 6727 [2022-11-03 02:22:16,614 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 130 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 02:22:16,615 INFO L413 NwaCegarLoop]: 3337 mSDtfsCounter, 3515 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3515 SdHoareTripleChecker+Valid, 3554 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:22:16,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3515 Valid, 3554 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 02:22:16,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6727 states. [2022-11-03 02:22:16,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6727 to 6707. [2022-11-03 02:22:16,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6707 states, 5899 states have (on average 1.6367180878114935) internal successors, (9655), 5918 states have internal predecessors, (9655), 614 states have call successors, (614), 193 states have call predecessors, (614), 192 states have return successors, (612), 596 states have call predecessors, (612), 612 states have call successors, (612) [2022-11-03 02:22:16,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6707 states to 6707 states and 10881 transitions. [2022-11-03 02:22:16,897 INFO L78 Accepts]: Start accepts. Automaton has 6707 states and 10881 transitions. Word has length 130 [2022-11-03 02:22:16,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:22:16,898 INFO L495 AbstractCegarLoop]: Abstraction has 6707 states and 10881 transitions. [2022-11-03 02:22:16,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 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 02:22:16,898 INFO L276 IsEmpty]: Start isEmpty. Operand 6707 states and 10881 transitions. [2022-11-03 02:22:16,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-03 02:22:16,908 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:22:16,908 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:22:16,949 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fcf88d-674a-496e-b33b-e1d80ad128b6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:22:17,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fcf88d-674a-496e-b33b-e1d80ad128b6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:22:17,123 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:22:17,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:22:17,123 INFO L85 PathProgramCache]: Analyzing trace with hash 2127267105, now seen corresponding path program 1 times [2022-11-03 02:22:17,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:22:17,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201995866] [2022-11-03 02:22:17,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:22:17,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:22:17,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:22:17,287 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:22:17,287 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:22:17,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201995866] [2022-11-03 02:22:17,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201995866] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:22:17,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710880713] [2022-11-03 02:22:17,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:22:17,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:22:17,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fcf88d-674a-496e-b33b-e1d80ad128b6/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:22:17,291 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fcf88d-674a-496e-b33b-e1d80ad128b6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:22:17,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fcf88d-674a-496e-b33b-e1d80ad128b6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 02:22:17,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:22:17,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 961 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:22:17,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:22:17,676 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-03 02:22:17,677 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:22:17,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710880713] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:22:17,677 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:22:17,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 02:22:17,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873707705] [2022-11-03 02:22:17,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:22:17,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:22:17,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:22:17,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:22:17,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:22:17,687 INFO L87 Difference]: Start difference. First operand 6707 states and 10881 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 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 02:22:18,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:22:18,643 INFO L93 Difference]: Finished difference Result 16732 states and 26314 transitions. [2022-11-03 02:22:18,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:22:18,645 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 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 130 [2022-11-03 02:22:18,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:22:18,740 INFO L225 Difference]: With dead ends: 16732 [2022-11-03 02:22:18,741 INFO L226 Difference]: Without dead ends: 11671 [2022-11-03 02:22:18,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 130 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 02:22:18,772 INFO L413 NwaCegarLoop]: 3336 mSDtfsCounter, 3518 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3518 SdHoareTripleChecker+Valid, 3553 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:22:18,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3518 Valid, 3553 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 02:22:18,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11671 states. [2022-11-03 02:22:19,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11671 to 11635. [2022-11-03 02:22:19,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11635 states, 10059 states have (on average 1.575405109851874) internal successors, (15847), 10094 states have internal predecessors, (15847), 1190 states have call successors, (1190), 385 states have call predecessors, (1190), 384 states have return successors, (1188), 1156 states have call predecessors, (1188), 1188 states have call successors, (1188) [2022-11-03 02:22:19,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11635 states to 11635 states and 18225 transitions. [2022-11-03 02:22:19,522 INFO L78 Accepts]: Start accepts. Automaton has 11635 states and 18225 transitions. Word has length 130 [2022-11-03 02:22:19,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:22:19,523 INFO L495 AbstractCegarLoop]: Abstraction has 11635 states and 18225 transitions. [2022-11-03 02:22:19,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 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 02:22:19,523 INFO L276 IsEmpty]: Start isEmpty. Operand 11635 states and 18225 transitions. [2022-11-03 02:22:19,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-03 02:22:19,546 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:22:19,546 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:22:19,587 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fcf88d-674a-496e-b33b-e1d80ad128b6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:22:19,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fcf88d-674a-496e-b33b-e1d80ad128b6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:22:19,767 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:22:19,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:22:19,768 INFO L85 PathProgramCache]: Analyzing trace with hash 2112561763, now seen corresponding path program 1 times [2022-11-03 02:22:19,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:22:19,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573130122] [2022-11-03 02:22:19,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:22:19,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:22:19,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:22:19,976 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:22:19,976 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:22:19,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573130122] [2022-11-03 02:22:19,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573130122] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:22:19,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561221001] [2022-11-03 02:22:19,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:22:19,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:22:19,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fcf88d-674a-496e-b33b-e1d80ad128b6/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:22:19,983 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fcf88d-674a-496e-b33b-e1d80ad128b6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:22:20,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fcf88d-674a-496e-b33b-e1d80ad128b6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 02:22:20,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:22:20,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 955 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:22:20,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:22:20,313 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 02:22:20,313 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:22:20,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561221001] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:22:20,314 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:22:20,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 02:22:20,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305003479] [2022-11-03 02:22:20,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:22:20,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:22:20,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:22:20,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:22:20,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:22:20,317 INFO L87 Difference]: Start difference. First operand 11635 states and 18225 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 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 02:22:21,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:22:21,630 INFO L93 Difference]: Finished difference Result 31420 states and 48538 transitions. [2022-11-03 02:22:21,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:22:21,631 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 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 130 [2022-11-03 02:22:21,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:22:21,734 INFO L225 Difference]: With dead ends: 31420 [2022-11-03 02:22:21,734 INFO L226 Difference]: Without dead ends: 21431 [2022-11-03 02:22:21,776 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 130 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 02:22:21,777 INFO L413 NwaCegarLoop]: 3301 mSDtfsCounter, 3503 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3503 SdHoareTripleChecker+Valid, 3518 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:22:21,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3503 Valid, 3518 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 02:22:21,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21431 states. [2022-11-03 02:22:22,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21431 to 21363. [2022-11-03 02:22:22,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21363 states, 18283 states have (on average 1.53361045780233) internal successors, (28039), 18350 states have internal predecessors, (28039), 2310 states have call successors, (2310), 769 states have call predecessors, (2310), 768 states have return successors, (2308), 2244 states have call predecessors, (2308), 2308 states have call successors, (2308) [2022-11-03 02:22:22,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21363 states to 21363 states and 32657 transitions. [2022-11-03 02:22:22,957 INFO L78 Accepts]: Start accepts. Automaton has 21363 states and 32657 transitions. Word has length 130 [2022-11-03 02:22:22,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:22:22,958 INFO L495 AbstractCegarLoop]: Abstraction has 21363 states and 32657 transitions. [2022-11-03 02:22:22,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 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 02:22:22,958 INFO L276 IsEmpty]: Start isEmpty. Operand 21363 states and 32657 transitions. [2022-11-03 02:22:22,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-03 02:22:22,992 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:22:22,992 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:22:23,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fcf88d-674a-496e-b33b-e1d80ad128b6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 02:22:23,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89fcf88d-674a-496e-b33b-e1d80ad128b6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:22:23,208 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:22:23,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:22:23,209 INFO L85 PathProgramCache]: Analyzing trace with hash -1031739039, now seen corresponding path program 1 times [2022-11-03 02:22:23,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:22:23,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166307625] [2022-11-03 02:22:23,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:22:23,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:22:23,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:22:24,107 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-03 02:22:24,108 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:22:24,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166307625] [2022-11-03 02:22:24,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166307625] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:22:24,108 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:22:24,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:22:24,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404874398] [2022-11-03 02:22:24,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:22:24,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:22:24,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:22:24,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:22:24,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:22:24,110 INFO L87 Difference]: Start difference. First operand 21363 states and 32657 transitions. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-03 02:22:27,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:22:27,148 INFO L93 Difference]: Finished difference Result 55355 states and 83479 transitions. [2022-11-03 02:22:27,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:22:27,148 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 130 [2022-11-03 02:22:27,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:22:27,329 INFO L225 Difference]: With dead ends: 55355 [2022-11-03 02:22:27,329 INFO L226 Difference]: Without dead ends: 35639 [2022-11-03 02:22:27,386 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:22:27,387 INFO L413 NwaCegarLoop]: 3331 mSDtfsCounter, 4170 mSDsluCounter, 7144 mSDsCounter, 0 mSdLazyCounter, 943 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4176 SdHoareTripleChecker+Valid, 9953 SdHoareTripleChecker+Invalid, 1083 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 943 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:22:27,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4176 Valid, 9953 Invalid, 1083 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 943 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-03 02:22:27,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35639 states. [2022-11-03 02:22:29,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35639 to 30963. [2022-11-03 02:22:29,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30963 states, 26379 states have (on average 1.5154099852155123) internal successors, (39975), 26478 states have internal predecessors, (39975), 3430 states have call successors, (3430), 1153 states have call predecessors, (3430), 1152 states have return successors, (3428), 3332 states have call predecessors, (3428), 3428 states have call successors, (3428) [2022-11-03 02:22:29,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30963 states to 30963 states and 46833 transitions. [2022-11-03 02:22:29,881 INFO L78 Accepts]: Start accepts. Automaton has 30963 states and 46833 transitions. Word has length 130 [2022-11-03 02:22:29,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:22:29,882 INFO L495 AbstractCegarLoop]: Abstraction has 30963 states and 46833 transitions. [2022-11-03 02:22:29,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-03 02:22:29,882 INFO L276 IsEmpty]: Start isEmpty. Operand 30963 states and 46833 transitions. [2022-11-03 02:22:29,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-11-03 02:22:29,929 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:22:29,929 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:22:29,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-03 02:22:29,930 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:22:29,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:22:29,930 INFO L85 PathProgramCache]: Analyzing trace with hash 952733088, now seen corresponding path program 1 times [2022-11-03 02:22:29,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:22:29,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924723685] [2022-11-03 02:22:29,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:22:29,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:22:29,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:22:30,572 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-03 02:22:30,572 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:22:30,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924723685] [2022-11-03 02:22:30,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924723685] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:22:30,573 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:22:30,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:22:30,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117851106] [2022-11-03 02:22:30,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:22:30,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:22:30,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:22:30,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:22:30,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:22:30,576 INFO L87 Difference]: Start difference. First operand 30963 states and 46833 transitions. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-03 02:22:35,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:22:35,702 INFO L93 Difference]: Finished difference Result 99579 states and 149272 transitions. [2022-11-03 02:22:35,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:22:35,703 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 131 [2022-11-03 02:22:35,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:22:36,082 INFO L225 Difference]: With dead ends: 99579 [2022-11-03 02:22:36,082 INFO L226 Difference]: Without dead ends: 70263 [2022-11-03 02:22:36,308 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:22:36,309 INFO L413 NwaCegarLoop]: 3309 mSDtfsCounter, 4169 mSDsluCounter, 10470 mSDsCounter, 0 mSdLazyCounter, 1206 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4189 SdHoareTripleChecker+Valid, 13030 SdHoareTripleChecker+Invalid, 1362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 1206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:22:36,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4189 Valid, 13030 Invalid, 1362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 1206 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-03 02:22:36,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70263 states. [2022-11-03 02:22:40,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70263 to 59123. [2022-11-03 02:22:40,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59123 states, 50155 states have (on average 1.494387399062905) internal successors, (74951), 50350 states have internal predecessors, (74951), 6662 states have call successors, (6662), 2305 states have call predecessors, (6662), 2304 states have return successors, (6660), 6468 states have call predecessors, (6660), 6660 states have call successors, (6660) [2022-11-03 02:22:40,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59123 states to 59123 states and 88273 transitions. [2022-11-03 02:22:40,766 INFO L78 Accepts]: Start accepts. Automaton has 59123 states and 88273 transitions. Word has length 131 [2022-11-03 02:22:40,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:22:40,768 INFO L495 AbstractCegarLoop]: Abstraction has 59123 states and 88273 transitions. [2022-11-03 02:22:40,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-03 02:22:40,768 INFO L276 IsEmpty]: Start isEmpty. Operand 59123 states and 88273 transitions. [2022-11-03 02:22:40,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-11-03 02:22:40,883 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:22:40,883 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:22:40,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-03 02:22:40,884 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:22:40,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:22:40,884 INFO L85 PathProgramCache]: Analyzing trace with hash -220946239, now seen corresponding path program 1 times [2022-11-03 02:22:40,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:22:40,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371911858] [2022-11-03 02:22:40,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:22:40,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:22:40,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:22:41,706 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-03 02:22:41,707 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:22:41,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371911858] [2022-11-03 02:22:41,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371911858] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:22:41,707 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:22:41,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:22:41,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114994005] [2022-11-03 02:22:41,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:22:41,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:22:41,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:22:41,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:22:41,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:22:41,711 INFO L87 Difference]: Start difference. First operand 59123 states and 88273 transitions. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-03 02:22:50,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:22:50,856 INFO L93 Difference]: Finished difference Result 202619 states and 300632 transitions. [2022-11-03 02:22:50,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:22:50,856 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 132 [2022-11-03 02:22:50,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:22:51,929 INFO L225 Difference]: With dead ends: 202619 [2022-11-03 02:22:51,930 INFO L226 Difference]: Without dead ends: 145143 [2022-11-03 02:22:52,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:22:52,158 INFO L413 NwaCegarLoop]: 3303 mSDtfsCounter, 4328 mSDsluCounter, 7056 mSDsCounter, 0 mSdLazyCounter, 921 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4348 SdHoareTripleChecker+Valid, 9848 SdHoareTripleChecker+Invalid, 1073 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 921 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:22:52,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4348 Valid, 9848 Invalid, 1073 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 921 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-03 02:22:52,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145143 states.