./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/token_ring.10.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 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_d67b1200-a845-4ce7-8b2a-f59030f4069c/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67b1200-a845-4ce7-8b2a-f59030f4069c/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67b1200-a845-4ce7-8b2a-f59030f4069c/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67b1200-a845-4ce7-8b2a-f59030f4069c/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/token_ring.10.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67b1200-a845-4ce7-8b2a-f59030f4069c/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67b1200-a845-4ce7-8b2a-f59030f4069c/bin/utaipan-gh47qXpMRh --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 6ba9401cadb8fecd59a1a331c94e3215cc972a92f03516bfd6c95164e3ec98a9 --- 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-2329fc7 [2022-12-14 09:10:07,345 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 09:10:07,347 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 09:10:07,366 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 09:10:07,366 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 09:10:07,367 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 09:10:07,368 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 09:10:07,369 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 09:10:07,371 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 09:10:07,372 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 09:10:07,373 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 09:10:07,374 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 09:10:07,374 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 09:10:07,375 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 09:10:07,376 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 09:10:07,377 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 09:10:07,378 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 09:10:07,379 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 09:10:07,380 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 09:10:07,382 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 09:10:07,383 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 09:10:07,385 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 09:10:07,386 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 09:10:07,386 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 09:10:07,389 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 09:10:07,390 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 09:10:07,390 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 09:10:07,391 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 09:10:07,391 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 09:10:07,392 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 09:10:07,392 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 09:10:07,393 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 09:10:07,394 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 09:10:07,394 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 09:10:07,395 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 09:10:07,395 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 09:10:07,396 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 09:10:07,396 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 09:10:07,396 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 09:10:07,397 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 09:10:07,397 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 09:10:07,398 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67b1200-a845-4ce7-8b2a-f59030f4069c/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 09:10:07,419 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 09:10:07,419 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 09:10:07,420 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 09:10:07,420 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 09:10:07,420 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 09:10:07,421 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 09:10:07,421 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 09:10:07,421 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 09:10:07,421 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 09:10:07,421 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 09:10:07,421 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 09:10:07,421 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 09:10:07,422 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 09:10:07,422 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 09:10:07,422 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 09:10:07,422 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 09:10:07,422 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 09:10:07,422 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 09:10:07,423 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 09:10:07,423 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 09:10:07,423 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 09:10:07,424 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 09:10:07,424 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 09:10:07,424 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 09:10:07,424 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 09:10:07,424 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 09:10:07,424 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 09:10:07,424 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 09:10:07,425 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 09:10:07,425 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 09:10:07,425 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 09:10:07,425 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 09:10:07,425 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 09:10:07,426 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 09:10:07,426 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 09:10:07,426 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 09:10:07,426 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 09:10:07,426 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 09:10:07,426 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 09:10:07,426 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 09:10:07,427 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 09:10:07,432 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_d67b1200-a845-4ce7-8b2a-f59030f4069c/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67b1200-a845-4ce7-8b2a-f59030f4069c/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6ba9401cadb8fecd59a1a331c94e3215cc972a92f03516bfd6c95164e3ec98a9 [2022-12-14 09:10:07,598 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 09:10:07,614 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 09:10:07,616 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 09:10:07,617 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 09:10:07,617 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 09:10:07,618 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67b1200-a845-4ce7-8b2a-f59030f4069c/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/systemc/token_ring.10.cil-2.c [2022-12-14 09:10:10,230 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 09:10:10,369 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 09:10:10,370 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67b1200-a845-4ce7-8b2a-f59030f4069c/sv-benchmarks/c/systemc/token_ring.10.cil-2.c [2022-12-14 09:10:10,378 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67b1200-a845-4ce7-8b2a-f59030f4069c/bin/utaipan-gh47qXpMRh/data/d240605a8/af22e0f505b640339730e2cb06aca8f5/FLAG3d8b80fee [2022-12-14 09:10:10,388 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67b1200-a845-4ce7-8b2a-f59030f4069c/bin/utaipan-gh47qXpMRh/data/d240605a8/af22e0f505b640339730e2cb06aca8f5 [2022-12-14 09:10:10,390 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 09:10:10,391 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 09:10:10,391 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 09:10:10,392 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 09:10:10,394 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 09:10:10,395 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 09:10:10" (1/1) ... [2022-12-14 09:10:10,395 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39f44edf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:10:10, skipping insertion in model container [2022-12-14 09:10:10,396 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 09:10:10" (1/1) ... [2022-12-14 09:10:10,401 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 09:10:10,435 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 09:10:10,532 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67b1200-a845-4ce7-8b2a-f59030f4069c/sv-benchmarks/c/systemc/token_ring.10.cil-2.c[671,684] [2022-12-14 09:10:10,605 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 09:10:10,614 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 09:10:10,622 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67b1200-a845-4ce7-8b2a-f59030f4069c/sv-benchmarks/c/systemc/token_ring.10.cil-2.c[671,684] [2022-12-14 09:10:10,662 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 09:10:10,676 INFO L208 MainTranslator]: Completed translation [2022-12-14 09:10:10,676 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:10:10 WrapperNode [2022-12-14 09:10:10,676 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 09:10:10,677 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 09:10:10,677 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 09:10:10,677 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 09:10:10,682 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:10:10" (1/1) ... [2022-12-14 09:10:10,691 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:10:10" (1/1) ... [2022-12-14 09:10:10,720 INFO L138 Inliner]: procedures = 48, calls = 61, calls flagged for inlining = 32, calls inlined = 32, statements flattened = 737 [2022-12-14 09:10:10,720 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 09:10:10,721 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 09:10:10,721 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 09:10:10,721 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 09:10:10,728 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:10:10" (1/1) ... [2022-12-14 09:10:10,728 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:10:10" (1/1) ... [2022-12-14 09:10:10,730 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:10:10" (1/1) ... [2022-12-14 09:10:10,731 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:10:10" (1/1) ... [2022-12-14 09:10:10,738 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:10:10" (1/1) ... [2022-12-14 09:10:10,745 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:10:10" (1/1) ... [2022-12-14 09:10:10,747 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:10:10" (1/1) ... [2022-12-14 09:10:10,749 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:10:10" (1/1) ... [2022-12-14 09:10:10,752 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 09:10:10,753 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 09:10:10,753 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 09:10:10,753 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 09:10:10,753 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:10:10" (1/1) ... [2022-12-14 09:10:10,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 09:10:10,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67b1200-a845-4ce7-8b2a-f59030f4069c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:10:10,780 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67b1200-a845-4ce7-8b2a-f59030f4069c/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 09:10:10,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67b1200-a845-4ce7-8b2a-f59030f4069c/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 09:10:10,815 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 09:10:10,816 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-12-14 09:10:10,816 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-12-14 09:10:10,816 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-12-14 09:10:10,816 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-12-14 09:10:10,816 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-12-14 09:10:10,816 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-12-14 09:10:10,816 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-12-14 09:10:10,816 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-12-14 09:10:10,816 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-12-14 09:10:10,816 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-12-14 09:10:10,816 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 09:10:10,817 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-12-14 09:10:10,817 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-12-14 09:10:10,817 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 09:10:10,817 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 09:10:10,914 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 09:10:10,916 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 09:10:11,475 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 09:10:11,750 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 09:10:11,750 INFO L300 CfgBuilder]: Removed 13 assume(true) statements. [2022-12-14 09:10:11,753 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 09:10:11 BoogieIcfgContainer [2022-12-14 09:10:11,753 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 09:10:11,754 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 09:10:11,754 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 09:10:11,756 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 09:10:11,757 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 09:10:10" (1/3) ... [2022-12-14 09:10:11,757 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10131bb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 09:10:11, skipping insertion in model container [2022-12-14 09:10:11,757 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:10:10" (2/3) ... [2022-12-14 09:10:11,757 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10131bb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 09:10:11, skipping insertion in model container [2022-12-14 09:10:11,757 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 09:10:11" (3/3) ... [2022-12-14 09:10:11,758 INFO L112 eAbstractionObserver]: Analyzing ICFG token_ring.10.cil-2.c [2022-12-14 09:10:11,773 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 09:10:11,773 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 09:10:11,818 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 09:10:11,823 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;@9d607b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 09:10:11,823 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 09:10:11,827 INFO L276 IsEmpty]: Start isEmpty. Operand has 166 states, 134 states have (on average 1.5522388059701493) internal successors, (208), 136 states have internal predecessors, (208), 24 states have call successors, (24), 6 states have call predecessors, (24), 6 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-12-14 09:10:11,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-12-14 09:10:11,834 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:10:11,834 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] [2022-12-14 09:10:11,834 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:10:11,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:10:11,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1275234621, now seen corresponding path program 1 times [2022-12-14 09:10:11,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:10:11,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655214184] [2022-12-14 09:10:11,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:10:11,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:10:11,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:10:12,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:10:12,102 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:10:12,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655214184] [2022-12-14 09:10:12,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655214184] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:10:12,103 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:10:12,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 09:10:12,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297235272] [2022-12-14 09:10:12,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:10:12,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 09:10:12,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:10:12,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 09:10:12,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:10:12,131 INFO L87 Difference]: Start difference. First operand has 166 states, 134 states have (on average 1.5522388059701493) internal successors, (208), 136 states have internal predecessors, (208), 24 states have call successors, (24), 6 states have call predecessors, (24), 6 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 09:10:12,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:10:12,480 INFO L93 Difference]: Finished difference Result 482 states and 758 transitions. [2022-12-14 09:10:12,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 09:10:12,482 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 60 [2022-12-14 09:10:12,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:10:12,490 INFO L225 Difference]: With dead ends: 482 [2022-12-14 09:10:12,490 INFO L226 Difference]: Without dead ends: 317 [2022-12-14 09:10:12,493 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 [2022-12-14 09:10:12,496 INFO L413 NwaCegarLoop]: 394 mSDtfsCounter, 446 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 446 SdHoareTripleChecker+Valid, 698 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 09:10:12,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [446 Valid, 698 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 09:10:12,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2022-12-14 09:10:12,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 316. [2022-12-14 09:10:12,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 259 states have (on average 1.5135135135135136) internal successors, (392), 261 states have internal predecessors, (392), 44 states have call successors, (44), 12 states have call predecessors, (44), 12 states have return successors, (44), 43 states have call predecessors, (44), 44 states have call successors, (44) [2022-12-14 09:10:12,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 480 transitions. [2022-12-14 09:10:12,544 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 480 transitions. Word has length 60 [2022-12-14 09:10:12,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:10:12,544 INFO L495 AbstractCegarLoop]: Abstraction has 316 states and 480 transitions. [2022-12-14 09:10:12,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 09:10:12,545 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 480 transitions. [2022-12-14 09:10:12,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-12-14 09:10:12,548 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:10:12,548 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:10:12,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 09:10:12,549 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:10:12,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:10:12,549 INFO L85 PathProgramCache]: Analyzing trace with hash -393723340, now seen corresponding path program 1 times [2022-12-14 09:10:12,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:10:12,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845137116] [2022-12-14 09:10:12,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:10:12,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:10:12,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:10:12,774 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-14 09:10:12,774 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:10:12,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845137116] [2022-12-14 09:10:12,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845137116] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:10:12,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433082520] [2022-12-14 09:10:12,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:10:12,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:10:12,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67b1200-a845-4ce7-8b2a-f59030f4069c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:10:12,776 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67b1200-a845-4ce7-8b2a-f59030f4069c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:10:12,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67b1200-a845-4ce7-8b2a-f59030f4069c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 09:10:12,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:10:12,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 852 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 09:10:12,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:10:12,991 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 09:10:12,991 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:10:12,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433082520] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:10:12,992 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 09:10:12,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2022-12-14 09:10:12,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505089255] [2022-12-14 09:10:12,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:10:12,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:10:12,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:10:12,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:10:12,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 09:10:12,995 INFO L87 Difference]: Start difference. First operand 316 states and 480 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 2 states have internal predecessors, (76), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 09:10:13,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:10:13,141 INFO L93 Difference]: Finished difference Result 931 states and 1439 transitions. [2022-12-14 09:10:13,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:10:13,142 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 2 states have internal predecessors, (76), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 121 [2022-12-14 09:10:13,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:10:13,145 INFO L225 Difference]: With dead ends: 931 [2022-12-14 09:10:13,146 INFO L226 Difference]: Without dead ends: 620 [2022-12-14 09:10:13,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 09:10:13,148 INFO L413 NwaCegarLoop]: 254 mSDtfsCounter, 223 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:10:13,149 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 450 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:10:13,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2022-12-14 09:10:13,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 616. [2022-12-14 09:10:13,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 616 states, 509 states have (on average 1.5108055009823183) internal successors, (769), 512 states have internal predecessors, (769), 82 states have call successors, (82), 24 states have call predecessors, (82), 24 states have return successors, (82), 80 states have call predecessors, (82), 82 states have call successors, (82) [2022-12-14 09:10:13,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 933 transitions. [2022-12-14 09:10:13,181 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 933 transitions. Word has length 121 [2022-12-14 09:10:13,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:10:13,181 INFO L495 AbstractCegarLoop]: Abstraction has 616 states and 933 transitions. [2022-12-14 09:10:13,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 2 states have internal predecessors, (76), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 09:10:13,181 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 933 transitions. [2022-12-14 09:10:13,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-12-14 09:10:13,184 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:10:13,184 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:10:13,192 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67b1200-a845-4ce7-8b2a-f59030f4069c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 09:10:13,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67b1200-a845-4ce7-8b2a-f59030f4069c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-12-14 09:10:13,386 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:10:13,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:10:13,388 INFO L85 PathProgramCache]: Analyzing trace with hash -64570220, now seen corresponding path program 1 times [2022-12-14 09:10:13,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:10:13,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552920342] [2022-12-14 09:10:13,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:10:13,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:10:13,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:10:13,631 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-14 09:10:13,632 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:10:13,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552920342] [2022-12-14 09:10:13,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552920342] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:10:13,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41978931] [2022-12-14 09:10:13,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:10:13,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:10:13,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67b1200-a845-4ce7-8b2a-f59030f4069c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:10:13,634 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67b1200-a845-4ce7-8b2a-f59030f4069c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:10:13,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67b1200-a845-4ce7-8b2a-f59030f4069c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 09:10:13,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:10:13,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 846 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 09:10:13,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:10:13,854 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 09:10:13,854 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:10:13,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41978931] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:10:13,854 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 09:10:13,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2022-12-14 09:10:13,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586755854] [2022-12-14 09:10:13,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:10:13,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:10:13,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:10:13,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:10:13,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 09:10:13,857 INFO L87 Difference]: Start difference. First operand 616 states and 933 transitions. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 2 states have internal predecessors, (94), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 09:10:14,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:10:14,018 INFO L93 Difference]: Finished difference Result 1825 states and 2812 transitions. [2022-12-14 09:10:14,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:10:14,018 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 2 states have internal predecessors, (94), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 121 [2022-12-14 09:10:14,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:10:14,025 INFO L225 Difference]: With dead ends: 1825 [2022-12-14 09:10:14,025 INFO L226 Difference]: Without dead ends: 1214 [2022-12-14 09:10:14,027 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 09:10:14,027 INFO L413 NwaCegarLoop]: 235 mSDtfsCounter, 205 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:10:14,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 431 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:10:14,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1214 states. [2022-12-14 09:10:14,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1214 to 1208. [2022-12-14 09:10:14,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1208 states, 1003 states have (on average 1.506480558325025) internal successors, (1511), 1008 states have internal predecessors, (1511), 156 states have call successors, (156), 48 states have call predecessors, (156), 48 states have return successors, (156), 152 states have call predecessors, (156), 156 states have call successors, (156) [2022-12-14 09:10:14,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1208 states to 1208 states and 1823 transitions. [2022-12-14 09:10:14,074 INFO L78 Accepts]: Start accepts. Automaton has 1208 states and 1823 transitions. Word has length 121 [2022-12-14 09:10:14,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:10:14,075 INFO L495 AbstractCegarLoop]: Abstraction has 1208 states and 1823 transitions. [2022-12-14 09:10:14,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 2 states have internal predecessors, (94), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 09:10:14,075 INFO L276 IsEmpty]: Start isEmpty. Operand 1208 states and 1823 transitions. [2022-12-14 09:10:14,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-12-14 09:10:14,077 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:10:14,078 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:10:14,084 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67b1200-a845-4ce7-8b2a-f59030f4069c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 09:10:14,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67b1200-a845-4ce7-8b2a-f59030f4069c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:10:14,279 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:10:14,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:10:14,281 INFO L85 PathProgramCache]: Analyzing trace with hash -2096034060, now seen corresponding path program 1 times [2022-12-14 09:10:14,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:10:14,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988306197] [2022-12-14 09:10:14,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:10:14,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:10:14,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:10:14,528 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-14 09:10:14,528 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:10:14,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988306197] [2022-12-14 09:10:14,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988306197] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:10:14,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564507297] [2022-12-14 09:10:14,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:10:14,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:10:14,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67b1200-a845-4ce7-8b2a-f59030f4069c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:10:14,530 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67b1200-a845-4ce7-8b2a-f59030f4069c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:10:14,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67b1200-a845-4ce7-8b2a-f59030f4069c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 09:10:14,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:10:14,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 840 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 09:10:14,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:10:14,700 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 09:10:14,700 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:10:14,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564507297] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:10:14,700 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 09:10:14,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2022-12-14 09:10:14,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111282736] [2022-12-14 09:10:14,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:10:14,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:10:14,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:10:14,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:10:14,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 09:10:14,702 INFO L87 Difference]: Start difference. First operand 1208 states and 1823 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 09:10:14,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:10:14,890 INFO L93 Difference]: Finished difference Result 3589 states and 5508 transitions. [2022-12-14 09:10:14,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:10:14,890 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 121 [2022-12-14 09:10:14,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:10:14,910 INFO L225 Difference]: With dead ends: 3589 [2022-12-14 09:10:14,910 INFO L226 Difference]: Without dead ends: 2386 [2022-12-14 09:10:14,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 09:10:14,918 INFO L413 NwaCegarLoop]: 252 mSDtfsCounter, 226 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:10:14,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 448 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:10:14,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2386 states. [2022-12-14 09:10:15,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2386 to 2376. [2022-12-14 09:10:15,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2376 states, 1979 states have (on average 1.5012632642748862) internal successors, (2971), 1988 states have internal predecessors, (2971), 300 states have call successors, (300), 96 states have call predecessors, (300), 96 states have return successors, (300), 292 states have call predecessors, (300), 300 states have call successors, (300) [2022-12-14 09:10:15,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2376 states to 2376 states and 3571 transitions. [2022-12-14 09:10:15,064 INFO L78 Accepts]: Start accepts. Automaton has 2376 states and 3571 transitions. Word has length 121 [2022-12-14 09:10:15,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:10:15,065 INFO L495 AbstractCegarLoop]: Abstraction has 2376 states and 3571 transitions. [2022-12-14 09:10:15,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 09:10:15,065 INFO L276 IsEmpty]: Start isEmpty. Operand 2376 states and 3571 transitions. [2022-12-14 09:10:15,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-12-14 09:10:15,073 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:10:15,074 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:10:15,080 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67b1200-a845-4ce7-8b2a-f59030f4069c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 09:10:15,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67b1200-a845-4ce7-8b2a-f59030f4069c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:10:15,275 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:10:15,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:10:15,275 INFO L85 PathProgramCache]: Analyzing trace with hash -1705772908, now seen corresponding path program 1 times [2022-12-14 09:10:15,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:10:15,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159209826] [2022-12-14 09:10:15,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:10:15,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:10:15,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:10:15,413 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-14 09:10:15,414 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:10:15,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159209826] [2022-12-14 09:10:15,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159209826] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:10:15,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420353668] [2022-12-14 09:10:15,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:10:15,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:10:15,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67b1200-a845-4ce7-8b2a-f59030f4069c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:10:15,415 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67b1200-a845-4ce7-8b2a-f59030f4069c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:10:15,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67b1200-a845-4ce7-8b2a-f59030f4069c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 09:10:15,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:10:15,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 834 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 09:10:15,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:10:15,598 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-12-14 09:10:15,598 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:10:15,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420353668] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:10:15,598 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 09:10:15,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 09:10:15,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271549330] [2022-12-14 09:10:15,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:10:15,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:10:15,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:10:15,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:10:15,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 09:10:15,600 INFO L87 Difference]: Start difference. First operand 2376 states and 3571 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 09:10:15,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:10:15,840 INFO L93 Difference]: Finished difference Result 7069 states and 10800 transitions. [2022-12-14 09:10:15,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:10:15,841 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 121 [2022-12-14 09:10:15,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:10:15,854 INFO L225 Difference]: With dead ends: 7069 [2022-12-14 09:10:15,855 INFO L226 Difference]: Without dead ends: 4698 [2022-12-14 09:10:15,859 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 09:10:15,860 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 217 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:10:15,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 420 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:10:15,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4698 states. [2022-12-14 09:10:15,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4698 to 4680. [2022-12-14 09:10:16,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4680 states, 3907 states have (on average 1.495520859994881) internal successors, (5843), 3924 states have internal predecessors, (5843), 580 states have call successors, (580), 192 states have call predecessors, (580), 192 states have return successors, (580), 564 states have call predecessors, (580), 580 states have call successors, (580) [2022-12-14 09:10:16,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4680 states to 4680 states and 7003 transitions. [2022-12-14 09:10:16,024 INFO L78 Accepts]: Start accepts. Automaton has 4680 states and 7003 transitions. Word has length 121 [2022-12-14 09:10:16,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:10:16,025 INFO L495 AbstractCegarLoop]: Abstraction has 4680 states and 7003 transitions. [2022-12-14 09:10:16,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 09:10:16,025 INFO L276 IsEmpty]: Start isEmpty. Operand 4680 states and 7003 transitions. [2022-12-14 09:10:16,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-12-14 09:10:16,034 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:10:16,034 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:10:16,041 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67b1200-a845-4ce7-8b2a-f59030f4069c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 09:10:16,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67b1200-a845-4ce7-8b2a-f59030f4069c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:10:16,235 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:10:16,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:10:16,236 INFO L85 PathProgramCache]: Analyzing trace with hash 2071313140, now seen corresponding path program 1 times [2022-12-14 09:10:16,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:10:16,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560708461] [2022-12-14 09:10:16,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:10:16,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:10:16,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:10:16,324 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 09:10:16,324 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:10:16,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560708461] [2022-12-14 09:10:16,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560708461] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:10:16,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170834156] [2022-12-14 09:10:16,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:10:16,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:10:16,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67b1200-a845-4ce7-8b2a-f59030f4069c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:10:16,326 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67b1200-a845-4ce7-8b2a-f59030f4069c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:10:16,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67b1200-a845-4ce7-8b2a-f59030f4069c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 09:10:16,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:10:16,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 828 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 09:10:16,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:10:16,509 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 09:10:16,509 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:10:16,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170834156] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:10:16,510 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 09:10:16,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 4 [2022-12-14 09:10:16,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590329743] [2022-12-14 09:10:16,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:10:16,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:10:16,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:10:16,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:10:16,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:10:16,511 INFO L87 Difference]: Start difference. First operand 4680 states and 7003 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 09:10:16,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:10:16,854 INFO L93 Difference]: Finished difference Result 13933 states and 21184 transitions. [2022-12-14 09:10:16,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:10:16,855 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 121 [2022-12-14 09:10:16,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:10:16,901 INFO L225 Difference]: With dead ends: 13933 [2022-12-14 09:10:16,902 INFO L226 Difference]: Without dead ends: 9258 [2022-12-14 09:10:16,918 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:10:16,919 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 211 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:10:16,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 420 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:10:16,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9258 states. [2022-12-14 09:10:17,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9258 to 9224. [2022-12-14 09:10:17,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9224 states, 7715 states have (on average 1.4894361633182114) internal successors, (11491), 7748 states have internal predecessors, (11491), 1124 states have call successors, (1124), 384 states have call predecessors, (1124), 384 states have return successors, (1124), 1092 states have call predecessors, (1124), 1124 states have call successors, (1124) [2022-12-14 09:10:17,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9224 states to 9224 states and 13739 transitions. [2022-12-14 09:10:17,278 INFO L78 Accepts]: Start accepts. Automaton has 9224 states and 13739 transitions. Word has length 121 [2022-12-14 09:10:17,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:10:17,279 INFO L495 AbstractCegarLoop]: Abstraction has 9224 states and 13739 transitions. [2022-12-14 09:10:17,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 09:10:17,279 INFO L276 IsEmpty]: Start isEmpty. Operand 9224 states and 13739 transitions. [2022-12-14 09:10:17,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-12-14 09:10:17,291 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:10:17,291 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:10:17,297 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67b1200-a845-4ce7-8b2a-f59030f4069c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 09:10:17,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d67b1200-a845-4ce7-8b2a-f59030f4069c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-14 09:10:17,492 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:10:17,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:10:17,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1076938068, now seen corresponding path program 1 times [2022-12-14 09:10:17,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:10:17,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196993673] [2022-12-14 09:10:17,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:10:17,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:10:17,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:10:17,831 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 09:10:17,831 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:10:17,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196993673] [2022-12-14 09:10:17,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196993673] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:10:17,832 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:10:17,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 09:10:17,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390676615] [2022-12-14 09:10:17,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:10:17,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 09:10:17,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:10:17,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 09:10:17,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 09:10:17,833 INFO L87 Difference]: Start difference. First operand 9224 states and 13739 transitions. Second operand has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 09:10:18,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:10:18,949 INFO L93 Difference]: Finished difference Result 29580 states and 44366 transitions. [2022-12-14 09:10:18,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 09:10:18,949 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 121 [2022-12-14 09:10:18,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:10:19,041 INFO L225 Difference]: With dead ends: 29580 [2022-12-14 09:10:19,042 INFO L226 Difference]: Without dead ends: 20362 [2022-12-14 09:10:19,079 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 [2022-12-14 09:10:19,080 INFO L413 NwaCegarLoop]: 231 mSDtfsCounter, 754 mSDsluCounter, 490 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 773 SdHoareTripleChecker+Valid, 721 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 09:10:19,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [773 Valid, 721 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 09:10:19,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20362 states. [2022-12-14 09:10:19,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20362 to 18056. [2022-12-14 09:10:19,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18056 states, 15107 states have (on average 1.482954921559542) internal successors, (22403), 15172 states have internal predecessors, (22403), 2180 states have call successors, (2180), 768 states have call predecessors, (2180), 768 states have return successors, (2180), 2116 states have call predecessors, (2180), 2180 states have call successors, (2180) [2022-12-14 09:10:19,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18056 states to 18056 states and 26763 transitions. [2022-12-14 09:10:19,981 INFO L78 Accepts]: Start accepts. Automaton has 18056 states and 26763 transitions. Word has length 121 [2022-12-14 09:10:19,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:10:19,982 INFO L495 AbstractCegarLoop]: Abstraction has 18056 states and 26763 transitions. [2022-12-14 09:10:19,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 09:10:19,982 INFO L276 IsEmpty]: Start isEmpty. Operand 18056 states and 26763 transitions. [2022-12-14 09:10:20,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-12-14 09:10:20,015 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:10:20,015 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:10:20,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 09:10:20,015 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:10:20,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:10:20,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1281381668, now seen corresponding path program 1 times [2022-12-14 09:10:20,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:10:20,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220963904] [2022-12-14 09:10:20,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:10:20,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:10:20,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:10:20,418 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 09:10:20,418 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:10:20,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220963904] [2022-12-14 09:10:20,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220963904] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:10:20,419 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:10:20,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 09:10:20,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379742201] [2022-12-14 09:10:20,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:10:20,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 09:10:20,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:10:20,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 09:10:20,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 09:10:20,420 INFO L87 Difference]: Start difference. First operand 18056 states and 26763 transitions. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 09:10:21,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:10:21,982 INFO L93 Difference]: Finished difference Result 46732 states and 69741 transitions. [2022-12-14 09:10:21,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 09:10:21,984 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 122 [2022-12-14 09:10:21,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:10:22,057 INFO L225 Difference]: With dead ends: 46732 [2022-12-14 09:10:22,057 INFO L226 Difference]: Without dead ends: 28682 [2022-12-14 09:10:22,086 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 [2022-12-14 09:10:22,087 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 712 mSDsluCounter, 518 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 718 SdHoareTripleChecker+Valid, 736 SdHoareTripleChecker+Invalid, 470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 09:10:22,087 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [718 Valid, 736 Invalid, 470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 09:10:22,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28682 states. [2022-12-14 09:10:23,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28682 to 26824. [2022-12-14 09:10:23,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26824 states, 22435 states have (on average 1.4778248272788055) internal successors, (33155), 22532 states have internal predecessors, (33155), 3236 states have call successors, (3236), 1152 states have call predecessors, (3236), 1152 states have return successors, (3236), 3140 states have call predecessors, (3236), 3236 states have call successors, (3236) [2022-12-14 09:10:23,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26824 states to 26824 states and 39627 transitions. [2022-12-14 09:10:23,337 INFO L78 Accepts]: Start accepts. Automaton has 26824 states and 39627 transitions. Word has length 122 [2022-12-14 09:10:23,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:10:23,337 INFO L495 AbstractCegarLoop]: Abstraction has 26824 states and 39627 transitions. [2022-12-14 09:10:23,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 09:10:23,338 INFO L276 IsEmpty]: Start isEmpty. Operand 26824 states and 39627 transitions. [2022-12-14 09:10:23,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-12-14 09:10:23,366 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:10:23,367 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:10:23,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 09:10:23,367 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:10:23,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:10:23,367 INFO L85 PathProgramCache]: Analyzing trace with hash -2084976552, now seen corresponding path program 1 times [2022-12-14 09:10:23,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:10:23,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599451632] [2022-12-14 09:10:23,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:10:23,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:10:23,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:10:23,633 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 09:10:23,633 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:10:23,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599451632] [2022-12-14 09:10:23,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599451632] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:10:23,633 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:10:23,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 09:10:23,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40180245] [2022-12-14 09:10:23,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:10:23,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 09:10:23,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:10:23,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 09:10:23,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 09:10:23,635 INFO L87 Difference]: Start difference. First operand 26824 states and 39627 transitions. Second operand has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 09:10:26,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:10:26,683 INFO L93 Difference]: Finished difference Result 93388 states and 138222 transitions. [2022-12-14 09:10:26,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 09:10:26,684 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 123 [2022-12-14 09:10:26,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:10:26,855 INFO L225 Difference]: With dead ends: 93388 [2022-12-14 09:10:26,855 INFO L226 Difference]: Without dead ends: 66570 [2022-12-14 09:10:26,908 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 [2022-12-14 09:10:26,908 INFO L413 NwaCegarLoop]: 226 mSDtfsCounter, 902 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 921 SdHoareTripleChecker+Valid, 734 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 09:10:26,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [921 Valid, 734 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 09:10:26,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66570 states. [2022-12-14 09:10:29,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66570 to 52488. [2022-12-14 09:10:29,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52488 states, 43907 states have (on average 1.4708133099505774) internal successors, (64579), 44100 states have internal predecessors, (64579), 6276 states have call successors, (6276), 2304 states have call predecessors, (6276), 2304 states have return successors, (6276), 6084 states have call predecessors, (6276), 6276 states have call successors, (6276) [2022-12-14 09:10:29,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52488 states to 52488 states and 77131 transitions. [2022-12-14 09:10:29,958 INFO L78 Accepts]: Start accepts. Automaton has 52488 states and 77131 transitions. Word has length 123 [2022-12-14 09:10:29,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:10:29,958 INFO L495 AbstractCegarLoop]: Abstraction has 52488 states and 77131 transitions. [2022-12-14 09:10:29,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 09:10:29,958 INFO L276 IsEmpty]: Start isEmpty. Operand 52488 states and 77131 transitions. [2022-12-14 09:10:30,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-12-14 09:10:30,020 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:10:30,020 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:10:30,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 09:10:30,020 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:10:30,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:10:30,021 INFO L85 PathProgramCache]: Analyzing trace with hash -769729876, now seen corresponding path program 1 times [2022-12-14 09:10:30,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:10:30,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724992988] [2022-12-14 09:10:30,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:10:30,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:10:30,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:10:30,291 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 09:10:30,291 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:10:30,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724992988] [2022-12-14 09:10:30,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724992988] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:10:30,292 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:10:30,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 09:10:30,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907794714] [2022-12-14 09:10:30,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:10:30,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 09:10:30,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:10:30,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 09:10:30,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 09:10:30,293 INFO L87 Difference]: Start difference. First operand 52488 states and 77131 transitions. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 09:10:34,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:10:34,571 INFO L93 Difference]: Finished difference Result 141836 states and 209485 transitions. [2022-12-14 09:10:34,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 09:10:34,572 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 124 [2022-12-14 09:10:34,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:10:34,799 INFO L225 Difference]: With dead ends: 141836 [2022-12-14 09:10:34,799 INFO L226 Difference]: Without dead ends: 89354 [2022-12-14 09:10:34,894 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 [2022-12-14 09:10:34,895 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 776 mSDsluCounter, 578 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 782 SdHoareTripleChecker+Valid, 796 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 09:10:34,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [782 Valid, 796 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 09:10:34,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89354 states. [2022-12-14 09:10:39,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89354 to 77960. [2022-12-14 09:10:39,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77960 states, 65187 states have (on average 1.4653688618896406) internal successors, (95523), 65476 states have internal predecessors, (95523), 9316 states have call successors, (9316), 3456 states have call predecessors, (9316), 3456 states have return successors, (9316), 9028 states have call predecessors, (9316), 9316 states have call successors, (9316) [2022-12-14 09:10:39,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77960 states to 77960 states and 114155 transitions. [2022-12-14 09:10:39,440 INFO L78 Accepts]: Start accepts. Automaton has 77960 states and 114155 transitions. Word has length 124 [2022-12-14 09:10:39,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:10:39,440 INFO L495 AbstractCegarLoop]: Abstraction has 77960 states and 114155 transitions. [2022-12-14 09:10:39,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 09:10:39,440 INFO L276 IsEmpty]: Start isEmpty. Operand 77960 states and 114155 transitions. [2022-12-14 09:10:39,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-12-14 09:10:39,500 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:10:39,501 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:10:39,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 09:10:39,501 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:10:39,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:10:39,501 INFO L85 PathProgramCache]: Analyzing trace with hash -788343976, now seen corresponding path program 1 times [2022-12-14 09:10:39,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:10:39,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176927] [2022-12-14 09:10:39,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:10:39,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:10:39,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:10:39,760 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 09:10:39,760 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:10:39,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176927] [2022-12-14 09:10:39,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176927] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:10:39,761 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:10:39,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 09:10:39,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214439515] [2022-12-14 09:10:39,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:10:39,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 09:10:39,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:10:39,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 09:10:39,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 09:10:39,762 INFO L87 Difference]: Start difference. First operand 77960 states and 114155 transitions. Second operand has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 09:10:49,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:10:49,362 INFO L93 Difference]: Finished difference Result 259980 states and 382862 transitions. [2022-12-14 09:10:49,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 09:10:49,363 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 125 [2022-12-14 09:10:49,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:10:49,881 INFO L225 Difference]: With dead ends: 259980 [2022-12-14 09:10:49,881 INFO L226 Difference]: Without dead ends: 182026 [2022-12-14 09:10:50,036 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 [2022-12-14 09:10:50,037 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 826 mSDsluCounter, 471 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 845 SdHoareTripleChecker+Valid, 681 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 09:10:50,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [845 Valid, 681 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 09:10:50,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182026 states. [2022-12-14 09:10:58,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182026 to 152456. [2022-12-14 09:10:58,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152456 states, 127491 states have (on average 1.4578205520389675) internal successors, (185859), 128068 states have internal predecessors, (185859), 18052 states have call successors, (18052), 6912 states have call predecessors, (18052), 6912 states have return successors, (18052), 17476 states have call predecessors, (18052), 18052 states have call successors, (18052) [2022-12-14 09:10:58,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152456 states to 152456 states and 221963 transitions. [2022-12-14 09:10:58,846 INFO L78 Accepts]: Start accepts. Automaton has 152456 states and 221963 transitions. Word has length 125 [2022-12-14 09:10:58,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:10:58,847 INFO L495 AbstractCegarLoop]: Abstraction has 152456 states and 221963 transitions. [2022-12-14 09:10:58,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 09:10:58,847 INFO L276 IsEmpty]: Start isEmpty. Operand 152456 states and 221963 transitions. [2022-12-14 09:10:58,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-12-14 09:10:58,962 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:10:58,963 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:10:58,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 09:10:58,963 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:10:58,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:10:58,963 INFO L85 PathProgramCache]: Analyzing trace with hash 970451368, now seen corresponding path program 1 times [2022-12-14 09:10:58,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:10:58,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862291670] [2022-12-14 09:10:58,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:10:58,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:10:58,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:10:59,217 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 09:10:59,217 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:10:59,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862291670] [2022-12-14 09:10:59,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862291670] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:10:59,217 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:10:59,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 09:10:59,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567877936] [2022-12-14 09:10:59,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:10:59,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 09:10:59,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:10:59,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 09:10:59,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 09:10:59,219 INFO L87 Difference]: Start difference. First operand 152456 states and 221963 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, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 09:11:14,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:11:14,262 INFO L93 Difference]: Finished difference Result 404364 states and 592429 transitions. [2022-12-14 09:11:14,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 09:11:14,263 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, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 126 [2022-12-14 09:11:14,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:11:15,004 INFO L225 Difference]: With dead ends: 404364 [2022-12-14 09:11:15,005 INFO L226 Difference]: Without dead ends: 251914 [2022-12-14 09:11:15,251 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 [2022-12-14 09:11:15,251 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 772 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 778 SdHoareTripleChecker+Valid, 628 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 09:11:15,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [778 Valid, 628 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 09:11:15,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251914 states. [2022-12-14 09:11:28,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251914 to 226376. [2022-12-14 09:11:28,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226376 states, 189219 states have (on average 1.452047627352433) internal successors, (274755), 190084 states have internal predecessors, (274755), 26788 states have call successors, (26788), 10368 states have call predecessors, (26788), 10368 states have return successors, (26788), 25924 states have call predecessors, (26788), 26788 states have call successors, (26788) [2022-12-14 09:11:29,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226376 states to 226376 states and 328331 transitions. [2022-12-14 09:11:29,529 INFO L78 Accepts]: Start accepts. Automaton has 226376 states and 328331 transitions. Word has length 126 [2022-12-14 09:11:29,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:11:29,530 INFO L495 AbstractCegarLoop]: Abstraction has 226376 states and 328331 transitions. [2022-12-14 09:11:29,530 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, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 09:11:29,530 INFO L276 IsEmpty]: Start isEmpty. Operand 226376 states and 328331 transitions. [2022-12-14 09:11:29,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-12-14 09:11:29,696 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:11:29,696 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:11:29,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-14 09:11:29,696 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:11:29,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:11:29,697 INFO L85 PathProgramCache]: Analyzing trace with hash -2067233700, now seen corresponding path program 1 times [2022-12-14 09:11:29,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:11:29,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369158075] [2022-12-14 09:11:29,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:11:29,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:11:29,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:11:29,941 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 09:11:29,941 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:11:29,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369158075] [2022-12-14 09:11:29,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369158075] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:11:29,941 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:11:29,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 09:11:29,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666028799] [2022-12-14 09:11:29,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:11:29,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 09:11:29,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:11:29,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 09:11:29,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 09:11:29,943 INFO L87 Difference]: Start difference. First operand 226376 states and 328331 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, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 09:12:00,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:12:00,909 INFO L93 Difference]: Finished difference Result 705036 states and 1030766 transitions. [2022-12-14 09:12:00,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 09:12:00,910 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, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 127 [2022-12-14 09:12:00,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:12:02,702 INFO L225 Difference]: With dead ends: 705036 [2022-12-14 09:12:02,702 INFO L226 Difference]: Without dead ends: 478666 [2022-12-14 09:12:03,146 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 [2022-12-14 09:12:03,146 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 729 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 748 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 09:12:03,147 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [748 Valid, 551 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 09:12:03,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478666 states. [2022-12-14 09:12:31,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478666 to 442376. [2022-12-14 09:12:32,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442376 states, 369795 states have (on average 1.4439216322557094) internal successors, (533955), 371524 states have internal predecessors, (533955), 51844 states have call successors, (51844), 20736 states have call predecessors, (51844), 20736 states have return successors, (51844), 50116 states have call predecessors, (51844), 51844 states have call successors, (51844) [2022-12-14 09:12:33,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442376 states to 442376 states and 637643 transitions. [2022-12-14 09:12:33,952 INFO L78 Accepts]: Start accepts. Automaton has 442376 states and 637643 transitions. Word has length 127 [2022-12-14 09:12:33,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:12:33,953 INFO L495 AbstractCegarLoop]: Abstraction has 442376 states and 637643 transitions. [2022-12-14 09:12:33,953 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, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 09:12:33,953 INFO L276 IsEmpty]: Start isEmpty. Operand 442376 states and 637643 transitions. [2022-12-14 09:12:34,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-12-14 09:12:34,280 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:12:34,280 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:12:34,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-14 09:12:34,281 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:12:34,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:12:34,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1861830300, now seen corresponding path program 1 times [2022-12-14 09:12:34,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:12:34,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657549024] [2022-12-14 09:12:34,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:12:34,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:12:34,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:12:34,466 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 09:12:34,466 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:12:34,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657549024] [2022-12-14 09:12:34,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657549024] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:12:34,466 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:12:34,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 09:12:34,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548525103] [2022-12-14 09:12:34,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:12:34,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 09:12:34,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:12:34,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 09:12:34,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 09:12:34,468 INFO L87 Difference]: Start difference. First operand 442376 states and 637643 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, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 09:13:21,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:13:21,975 INFO L93 Difference]: Finished difference Result 1099020 states and 1583725 transitions. [2022-12-14 09:13:21,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 09:13:21,976 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, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 128 [2022-12-14 09:13:21,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:13:24,353 INFO L225 Difference]: With dead ends: 1099020 [2022-12-14 09:13:24,353 INFO L226 Difference]: Without dead ends: 656650 [2022-12-14 09:13:25,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2022-12-14 09:13:25,240 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 838 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 857 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 09:13:25,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [857 Valid, 517 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 09:13:25,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656650 states. [2022-12-14 09:14:11,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656650 to 656648. [2022-12-14 09:14:12,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 656648 states, 548643 states have (on average 1.4377928817099643) internal successors, (788835), 551236 states have internal predecessors, (788835), 76900 states have call successors, (76900), 31104 states have call predecessors, (76900), 31104 states have return successors, (76900), 74308 states have call predecessors, (76900), 76900 states have call successors, (76900) [2022-12-14 09:14:15,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 656648 states to 656648 states and 942635 transitions. [2022-12-14 09:14:15,136 INFO L78 Accepts]: Start accepts. Automaton has 656648 states and 942635 transitions. Word has length 128 [2022-12-14 09:14:15,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:14:15,136 INFO L495 AbstractCegarLoop]: Abstraction has 656648 states and 942635 transitions. [2022-12-14 09:14:15,137 INFO L496 AbstractCegarLoop]: INTERPOLANT 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, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 09:14:15,137 INFO L276 IsEmpty]: Start isEmpty. Operand 656648 states and 942635 transitions. [2022-12-14 09:14:15,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-12-14 09:14:15,927 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:14:15,927 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:14:15,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-14 09:14:15,928 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:14:15,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:14:15,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1444514492, now seen corresponding path program 1 times [2022-12-14 09:14:15,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:14:15,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845433508] [2022-12-14 09:14:15,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:14:15,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:14:15,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:14:16,339 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 09:14:16,340 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:14:16,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845433508] [2022-12-14 09:14:16,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845433508] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:14:16,340 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:14:16,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 09:14:16,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505768648] [2022-12-14 09:14:16,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:14:16,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 09:14:16,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:14:16,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 09:14:16,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 09:14:16,342 INFO L87 Difference]: Start difference. First operand 656648 states and 942635 transitions. Second operand has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 09:15:36,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:15:36,754 INFO L93 Difference]: Finished difference Result 1667532 states and 2411869 transitions. [2022-12-14 09:15:36,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 09:15:36,755 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 129 [2022-12-14 09:15:36,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:15:40,617 INFO L225 Difference]: With dead ends: 1667532 [2022-12-14 09:15:40,617 INFO L226 Difference]: Without dead ends: 1010890 [2022-12-14 09:15:42,059 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 [2022-12-14 09:15:42,060 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 673 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 679 SdHoareTripleChecker+Valid, 706 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 09:15:42,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [679 Valid, 706 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 09:15:42,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1010890 states. [2022-12-14 09:16:57,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1010890 to 974600. [2022-12-14 09:16:58,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 974600 states, 813891 states have (on average 1.4315270718069126) internal successors, (1165107), 817780 states have internal predecessors, (1165107), 114052 states have call successors, (114052), 46656 states have call predecessors, (114052), 46656 states have return successors, (114052), 110164 states have call predecessors, (114052), 114052 states have call successors, (114052) [2022-12-14 09:17:02,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 974600 states to 974600 states and 1393211 transitions. [2022-12-14 09:17:02,449 INFO L78 Accepts]: Start accepts. Automaton has 974600 states and 1393211 transitions. Word has length 129 [2022-12-14 09:17:02,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:17:02,450 INFO L495 AbstractCegarLoop]: Abstraction has 974600 states and 1393211 transitions. [2022-12-14 09:17:02,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 09:17:02,450 INFO L276 IsEmpty]: Start isEmpty. Operand 974600 states and 1393211 transitions. [2022-12-14 09:17:03,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-12-14 09:17:03,173 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:17:03,173 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:17:03,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-14 09:17:03,173 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:17:03,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:17:03,173 INFO L85 PathProgramCache]: Analyzing trace with hash 950463672, now seen corresponding path program 1 times [2022-12-14 09:17:03,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:17:03,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205264584] [2022-12-14 09:17:03,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:17:03,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:17:03,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:17:03,541 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 09:17:03,541 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:17:03,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205264584] [2022-12-14 09:17:03,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205264584] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:17:03,541 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:17:03,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 09:17:03,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186034731] [2022-12-14 09:17:03,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:17:03,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 09:17:03,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:17:03,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 09:17:03,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 09:17:03,543 INFO L87 Difference]: Start difference. First operand 974600 states and 1393211 transitions. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8)