./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_634c75ee-bfad-470d-8853-c76936e82586/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_634c75ee-bfad-470d-8853-c76936e82586/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_634c75ee-bfad-470d-8853-c76936e82586/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_634c75ee-bfad-470d-8853-c76936e82586/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_634c75ee-bfad-470d-8853-c76936e82586/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_634c75ee-bfad-470d-8853-c76936e82586/bin/utaipan-Q6hlc19bkW --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 2d43a579fead76cada979bbaf2912558c79980eef82c3d2143337dc895995c75 --- 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-4e7fbc6 [2022-11-23 15:27:12,361 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 15:27:12,363 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 15:27:12,394 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 15:27:12,397 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 15:27:12,400 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 15:27:12,403 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 15:27:12,407 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 15:27:12,409 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 15:27:12,415 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 15:27:12,417 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 15:27:12,419 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 15:27:12,419 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 15:27:12,421 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 15:27:12,422 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 15:27:12,428 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 15:27:12,429 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 15:27:12,430 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 15:27:12,431 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 15:27:12,437 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 15:27:12,441 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 15:27:12,442 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 15:27:12,444 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 15:27:12,444 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 15:27:12,447 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 15:27:12,448 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 15:27:12,448 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 15:27:12,449 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 15:27:12,449 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 15:27:12,450 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 15:27:12,451 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 15:27:12,451 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 15:27:12,452 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 15:27:12,453 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 15:27:12,454 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 15:27:12,454 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 15:27:12,455 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 15:27:12,455 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 15:27:12,455 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 15:27:12,456 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 15:27:12,456 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 15:27:12,459 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_634c75ee-bfad-470d-8853-c76936e82586/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 15:27:12,487 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 15:27:12,488 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 15:27:12,488 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 15:27:12,488 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 15:27:12,489 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 15:27:12,489 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 15:27:12,490 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 15:27:12,490 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 15:27:12,490 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 15:27:12,490 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 15:27:12,491 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 15:27:12,491 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 15:27:12,492 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 15:27:12,492 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 15:27:12,492 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 15:27:12,492 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 15:27:12,492 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 15:27:12,493 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 15:27:12,493 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 15:27:12,493 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 15:27:12,494 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 15:27:12,494 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 15:27:12,494 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 15:27:12,494 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 15:27:12,494 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 15:27:12,494 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 15:27:12,495 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 15:27:12,495 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 15:27:12,495 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 15:27:12,495 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 15:27:12,495 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 15:27:12,496 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 15:27:12,496 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:27:12,496 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 15:27:12,496 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 15:27:12,497 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 15:27:12,497 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 15:27:12,497 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 15:27:12,497 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 15:27:12,497 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 15:27:12,497 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 15:27:12,499 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_634c75ee-bfad-470d-8853-c76936e82586/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_634c75ee-bfad-470d-8853-c76936e82586/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2d43a579fead76cada979bbaf2912558c79980eef82c3d2143337dc895995c75 [2022-11-23 15:27:12,737 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 15:27:12,758 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 15:27:12,761 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 15:27:12,762 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 15:27:12,763 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 15:27:12,764 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_634c75ee-bfad-470d-8853-c76936e82586/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2022-11-23 15:27:16,020 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 15:27:16,728 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 15:27:16,729 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_634c75ee-bfad-470d-8853-c76936e82586/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2022-11-23 15:27:16,777 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_634c75ee-bfad-470d-8853-c76936e82586/bin/utaipan-Q6hlc19bkW/data/b55fb76ff/086d02b5fea34010bccb1361eee8a4ec/FLAG123c9b02f [2022-11-23 15:27:17,106 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_634c75ee-bfad-470d-8853-c76936e82586/bin/utaipan-Q6hlc19bkW/data/b55fb76ff/086d02b5fea34010bccb1361eee8a4ec [2022-11-23 15:27:17,109 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 15:27:17,110 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 15:27:17,112 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 15:27:17,112 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 15:27:17,117 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 15:27:17,117 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:27:17" (1/1) ... [2022-11-23 15:27:17,119 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4746437d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:27:17, skipping insertion in model container [2022-11-23 15:27:17,119 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:27:17" (1/1) ... [2022-11-23 15:27:17,127 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 15:27:17,414 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 15:27:18,005 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_634c75ee-bfad-470d-8853-c76936e82586/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[19354,19367] [2022-11-23 15:27:19,541 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:27:19,569 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 15:27:19,656 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_634c75ee-bfad-470d-8853-c76936e82586/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[19354,19367] [2022-11-23 15:27:20,813 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:27:20,847 INFO L208 MainTranslator]: Completed translation [2022-11-23 15:27:20,848 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:27:20 WrapperNode [2022-11-23 15:27:20,848 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 15:27:20,849 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 15:27:20,849 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 15:27:20,849 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 15:27:20,857 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:27:20" (1/1) ... [2022-11-23 15:27:20,946 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:27:20" (1/1) ... [2022-11-23 15:27:21,232 INFO L138 Inliner]: procedures = 25, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 18587 [2022-11-23 15:27:21,233 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 15:27:21,234 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 15:27:21,234 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 15:27:21,234 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 15:27:21,244 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:27:20" (1/1) ... [2022-11-23 15:27:21,244 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:27:20" (1/1) ... [2022-11-23 15:27:21,299 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:27:20" (1/1) ... [2022-11-23 15:27:21,299 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:27:20" (1/1) ... [2022-11-23 15:27:21,432 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:27:20" (1/1) ... [2022-11-23 15:27:21,486 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:27:20" (1/1) ... [2022-11-23 15:27:21,516 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:27:20" (1/1) ... [2022-11-23 15:27:21,534 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:27:20" (1/1) ... [2022-11-23 15:27:21,583 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 15:27:21,584 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 15:27:21,585 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 15:27:21,585 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 15:27:21,586 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:27:20" (1/1) ... [2022-11-23 15:27:21,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:27:21,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_634c75ee-bfad-470d-8853-c76936e82586/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:27:21,620 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_634c75ee-bfad-470d-8853-c76936e82586/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 15:27:21,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_634c75ee-bfad-470d-8853-c76936e82586/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 15:27:21,741 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 15:27:21,741 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 15:27:21,741 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 15:27:21,742 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 15:27:22,409 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 15:27:22,411 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 15:27:31,045 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 15:27:31,886 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 15:27:31,886 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-23 15:27:31,895 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:27:31 BoogieIcfgContainer [2022-11-23 15:27:31,895 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 15:27:31,901 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 15:27:31,901 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 15:27:31,905 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 15:27:31,905 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:27:17" (1/3) ... [2022-11-23 15:27:31,908 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1411235 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:27:31, skipping insertion in model container [2022-11-23 15:27:31,908 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:27:20" (2/3) ... [2022-11-23 15:27:31,909 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1411235 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:27:31, skipping insertion in model container [2022-11-23 15:27:31,909 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:27:31" (3/3) ... [2022-11-23 15:27:31,910 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2022-11-23 15:27:31,939 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 15:27:31,940 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 15:27:32,072 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 15:27:32,080 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;@5882968c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 15:27:32,081 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 15:27:32,099 INFO L276 IsEmpty]: Start isEmpty. Operand has 2815 states, 2813 states have (on average 1.911837895485247) internal successors, (5378), 2814 states have internal predecessors, (5378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:27:32,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-23 15:27:32,149 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:27:32,150 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:27:32,151 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:27:32,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:27:32,158 INFO L85 PathProgramCache]: Analyzing trace with hash -238592942, now seen corresponding path program 1 times [2022-11-23 15:27:32,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:27:32,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876897144] [2022-11-23 15:27:32,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:27:32,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:27:32,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:27:32,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:27:32,909 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:27:32,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876897144] [2022-11-23 15:27:32,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876897144] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:27:32,911 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:27:32,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:27:32,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548708507] [2022-11-23 15:27:32,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:27:32,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:27:32,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:27:32,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:27:32,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:27:32,973 INFO L87 Difference]: Start difference. First operand has 2815 states, 2813 states have (on average 1.911837895485247) internal successors, (5378), 2814 states have internal predecessors, (5378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:27:33,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:27:33,660 INFO L93 Difference]: Finished difference Result 3245 states and 6093 transitions. [2022-11-23 15:27:33,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:27:33,664 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2022-11-23 15:27:33,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:27:33,689 INFO L225 Difference]: With dead ends: 3245 [2022-11-23 15:27:33,689 INFO L226 Difference]: Without dead ends: 3028 [2022-11-23 15:27:33,695 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:27:33,698 INFO L413 NwaCegarLoop]: 5375 mSDtfsCounter, 2633 mSDsluCounter, 2988 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2633 SdHoareTripleChecker+Valid, 8363 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 15:27:33,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2633 Valid, 8363 Invalid, 116 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [44 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 15:27:33,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3028 states. [2022-11-23 15:27:33,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3028 to 3026. [2022-11-23 15:27:33,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3026 states, 3025 states have (on average 1.2730578512396695) internal successors, (3851), 3025 states have internal predecessors, (3851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:27:33,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3026 states to 3026 states and 3851 transitions. [2022-11-23 15:27:33,836 INFO L78 Accepts]: Start accepts. Automaton has 3026 states and 3851 transitions. Word has length 77 [2022-11-23 15:27:33,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:27:33,837 INFO L495 AbstractCegarLoop]: Abstraction has 3026 states and 3851 transitions. [2022-11-23 15:27:33,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:27:33,838 INFO L276 IsEmpty]: Start isEmpty. Operand 3026 states and 3851 transitions. [2022-11-23 15:27:33,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-23 15:27:33,845 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:27:33,845 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:27:33,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 15:27:33,846 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:27:33,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:27:33,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1129198258, now seen corresponding path program 1 times [2022-11-23 15:27:33,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:27:33,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751561409] [2022-11-23 15:27:33,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:27:33,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:27:33,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:27:34,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:27:34,279 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:27:34,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751561409] [2022-11-23 15:27:34,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751561409] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:27:34,280 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:27:34,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 15:27:34,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798097443] [2022-11-23 15:27:34,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:27:34,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:27:34,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:27:34,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:27:34,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:27:34,283 INFO L87 Difference]: Start difference. First operand 3026 states and 3851 transitions. Second operand has 5 states, 5 states have (on average 15.4) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:27:36,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:27:36,085 INFO L93 Difference]: Finished difference Result 4621 states and 5988 transitions. [2022-11-23 15:27:36,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 15:27:36,086 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2022-11-23 15:27:36,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:27:36,094 INFO L225 Difference]: With dead ends: 4621 [2022-11-23 15:27:36,095 INFO L226 Difference]: Without dead ends: 2529 [2022-11-23 15:27:36,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-23 15:27:36,100 INFO L413 NwaCegarLoop]: 1540 mSDtfsCounter, 8045 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 1149 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8045 SdHoareTripleChecker+Valid, 1704 SdHoareTripleChecker+Invalid, 1173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-23 15:27:36,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8045 Valid, 1704 Invalid, 1173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1149 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-23 15:27:36,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2529 states. [2022-11-23 15:27:36,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2529 to 2527. [2022-11-23 15:27:36,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2527 states, 2526 states have (on average 1.2984956452889944) internal successors, (3280), 2526 states have internal predecessors, (3280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:27:36,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2527 states to 2527 states and 3280 transitions. [2022-11-23 15:27:36,195 INFO L78 Accepts]: Start accepts. Automaton has 2527 states and 3280 transitions. Word has length 77 [2022-11-23 15:27:36,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:27:36,196 INFO L495 AbstractCegarLoop]: Abstraction has 2527 states and 3280 transitions. [2022-11-23 15:27:36,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:27:36,197 INFO L276 IsEmpty]: Start isEmpty. Operand 2527 states and 3280 transitions. [2022-11-23 15:27:36,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-23 15:27:36,202 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:27:36,202 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:27:36,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 15:27:36,203 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:27:36,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:27:36,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1837517492, now seen corresponding path program 1 times [2022-11-23 15:27:36,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:27:36,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431499023] [2022-11-23 15:27:36,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:27:36,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:27:36,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:27:36,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:27:36,351 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:27:36,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431499023] [2022-11-23 15:27:36,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431499023] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:27:36,352 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:27:36,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:27:36,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398678403] [2022-11-23 15:27:36,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:27:36,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:27:36,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:27:36,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:27:36,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:27:36,354 INFO L87 Difference]: Start difference. First operand 2527 states and 3280 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:27:36,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:27:36,714 INFO L93 Difference]: Finished difference Result 4340 states and 5743 transitions. [2022-11-23 15:27:36,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:27:36,715 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2022-11-23 15:27:36,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:27:36,728 INFO L225 Difference]: With dead ends: 4340 [2022-11-23 15:27:36,729 INFO L226 Difference]: Without dead ends: 3784 [2022-11-23 15:27:36,730 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:27:36,732 INFO L413 NwaCegarLoop]: 3538 mSDtfsCounter, 2271 mSDsluCounter, 1489 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2271 SdHoareTripleChecker+Valid, 5027 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:27:36,732 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2271 Valid, 5027 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:27:36,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3784 states. [2022-11-23 15:27:36,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3784 to 3782. [2022-11-23 15:27:36,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3782 states, 3781 states have (on average 1.3009785770960063) internal successors, (4919), 3781 states have internal predecessors, (4919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:27:36,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3782 states to 3782 states and 4919 transitions. [2022-11-23 15:27:36,944 INFO L78 Accepts]: Start accepts. Automaton has 3782 states and 4919 transitions. Word has length 78 [2022-11-23 15:27:36,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:27:36,946 INFO L495 AbstractCegarLoop]: Abstraction has 3782 states and 4919 transitions. [2022-11-23 15:27:36,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:27:36,947 INFO L276 IsEmpty]: Start isEmpty. Operand 3782 states and 4919 transitions. [2022-11-23 15:27:36,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-23 15:27:36,956 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:27:36,956 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:27:36,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 15:27:36,956 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:27:36,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:27:36,957 INFO L85 PathProgramCache]: Analyzing trace with hash -618269756, now seen corresponding path program 1 times [2022-11-23 15:27:36,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:27:36,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707991880] [2022-11-23 15:27:36,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:27:36,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:27:37,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:27:37,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:27:37,315 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:27:37,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707991880] [2022-11-23 15:27:37,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707991880] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:27:37,316 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:27:37,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 15:27:37,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221471431] [2022-11-23 15:27:37,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:27:37,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:27:37,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:27:37,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:27:37,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:27:37,321 INFO L87 Difference]: Start difference. First operand 3782 states and 4919 transitions. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:27:39,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:27:39,261 INFO L93 Difference]: Finished difference Result 6060 states and 7995 transitions. [2022-11-23 15:27:39,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 15:27:39,262 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2022-11-23 15:27:39,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:27:39,276 INFO L225 Difference]: With dead ends: 6060 [2022-11-23 15:27:39,276 INFO L226 Difference]: Without dead ends: 4058 [2022-11-23 15:27:39,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-23 15:27:39,294 INFO L413 NwaCegarLoop]: 1233 mSDtfsCounter, 6730 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 1043 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6730 SdHoareTripleChecker+Valid, 1344 SdHoareTripleChecker+Invalid, 1200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 1043 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-23 15:27:39,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6730 Valid, 1344 Invalid, 1200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 1043 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-23 15:27:39,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4058 states. [2022-11-23 15:27:39,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4058 to 4056. [2022-11-23 15:27:39,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4056 states, 4055 states have (on average 1.2816276202219483) internal successors, (5197), 4055 states have internal predecessors, (5197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:27:39,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4056 states to 4056 states and 5197 transitions. [2022-11-23 15:27:39,620 INFO L78 Accepts]: Start accepts. Automaton has 4056 states and 5197 transitions. Word has length 78 [2022-11-23 15:27:39,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:27:39,621 INFO L495 AbstractCegarLoop]: Abstraction has 4056 states and 5197 transitions. [2022-11-23 15:27:39,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:27:39,621 INFO L276 IsEmpty]: Start isEmpty. Operand 4056 states and 5197 transitions. [2022-11-23 15:27:39,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-23 15:27:39,642 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:27:39,642 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:27:39,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 15:27:39,643 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:27:39,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:27:39,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1256480666, now seen corresponding path program 1 times [2022-11-23 15:27:39,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:27:39,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911667453] [2022-11-23 15:27:39,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:27:39,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:27:39,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:27:39,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:27:39,836 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:27:39,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911667453] [2022-11-23 15:27:39,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911667453] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:27:39,837 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:27:39,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:27:39,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149537396] [2022-11-23 15:27:39,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:27:39,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:27:39,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:27:39,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:27:39,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:27:39,839 INFO L87 Difference]: Start difference. First operand 4056 states and 5197 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:27:40,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:27:40,530 INFO L93 Difference]: Finished difference Result 6702 states and 9017 transitions. [2022-11-23 15:27:40,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:27:40,530 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2022-11-23 15:27:40,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:27:40,551 INFO L225 Difference]: With dead ends: 6702 [2022-11-23 15:27:40,551 INFO L226 Difference]: Without dead ends: 5475 [2022-11-23 15:27:40,555 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:27:40,557 INFO L413 NwaCegarLoop]: 2171 mSDtfsCounter, 1115 mSDsluCounter, 1214 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1115 SdHoareTripleChecker+Valid, 3385 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 15:27:40,557 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1115 Valid, 3385 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 15:27:40,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5475 states. [2022-11-23 15:27:40,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5475 to 5473. [2022-11-23 15:27:40,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5473 states, 5472 states have (on average 1.3154239766081872) internal successors, (7198), 5472 states have internal predecessors, (7198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:27:41,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5473 states to 5473 states and 7198 transitions. [2022-11-23 15:27:41,015 INFO L78 Accepts]: Start accepts. Automaton has 5473 states and 7198 transitions. Word has length 78 [2022-11-23 15:27:41,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:27:41,016 INFO L495 AbstractCegarLoop]: Abstraction has 5473 states and 7198 transitions. [2022-11-23 15:27:41,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:27:41,018 INFO L276 IsEmpty]: Start isEmpty. Operand 5473 states and 7198 transitions. [2022-11-23 15:27:41,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-23 15:27:41,039 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:27:41,040 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:27:41,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 15:27:41,040 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:27:41,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:27:41,041 INFO L85 PathProgramCache]: Analyzing trace with hash -373138448, now seen corresponding path program 1 times [2022-11-23 15:27:41,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:27:41,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572355692] [2022-11-23 15:27:41,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:27:41,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:27:41,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:27:41,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:27:41,382 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:27:41,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572355692] [2022-11-23 15:27:41,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572355692] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:27:41,383 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:27:41,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 15:27:41,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337369444] [2022-11-23 15:27:41,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:27:41,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:27:41,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:27:41,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:27:41,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:27:41,385 INFO L87 Difference]: Start difference. First operand 5473 states and 7198 transitions. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:27:43,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:27:43,064 INFO L93 Difference]: Finished difference Result 12026 states and 16334 transitions. [2022-11-23 15:27:43,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 15:27:43,065 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2022-11-23 15:27:43,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:27:43,116 INFO L225 Difference]: With dead ends: 12026 [2022-11-23 15:27:43,117 INFO L226 Difference]: Without dead ends: 7318 [2022-11-23 15:27:43,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-23 15:27:43,126 INFO L413 NwaCegarLoop]: 1015 mSDtfsCounter, 5238 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 792 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5238 SdHoareTripleChecker+Valid, 1182 SdHoareTripleChecker+Invalid, 797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:27:43,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5238 Valid, 1182 Invalid, 797 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 792 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-23 15:27:43,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7318 states. [2022-11-23 15:27:43,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7318 to 7316. [2022-11-23 15:27:43,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7316 states, 7315 states have (on average 1.361038961038961) internal successors, (9956), 7315 states have internal predecessors, (9956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:27:43,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7316 states to 7316 states and 9956 transitions. [2022-11-23 15:27:43,890 INFO L78 Accepts]: Start accepts. Automaton has 7316 states and 9956 transitions. Word has length 78 [2022-11-23 15:27:43,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:27:43,891 INFO L495 AbstractCegarLoop]: Abstraction has 7316 states and 9956 transitions. [2022-11-23 15:27:43,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:27:43,891 INFO L276 IsEmpty]: Start isEmpty. Operand 7316 states and 9956 transitions. [2022-11-23 15:27:43,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-23 15:27:43,900 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:27:43,901 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:27:43,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-23 15:27:43,901 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:27:43,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:27:43,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1730654079, now seen corresponding path program 1 times [2022-11-23 15:27:43,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:27:43,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912063516] [2022-11-23 15:27:43,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:27:43,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:27:43,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:27:44,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:27:44,062 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:27:44,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912063516] [2022-11-23 15:27:44,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912063516] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:27:44,063 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:27:44,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:27:44,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725558774] [2022-11-23 15:27:44,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:27:44,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:27:44,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:27:44,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:27:44,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:27:44,065 INFO L87 Difference]: Start difference. First operand 7316 states and 9956 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:27:45,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:27:45,628 INFO L93 Difference]: Finished difference Result 18409 states and 25446 transitions. [2022-11-23 15:27:45,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:27:45,629 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2022-11-23 15:27:45,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:27:45,668 INFO L225 Difference]: With dead ends: 18409 [2022-11-23 15:27:45,668 INFO L226 Difference]: Without dead ends: 12622 [2022-11-23 15:27:45,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:27:45,679 INFO L413 NwaCegarLoop]: 2197 mSDtfsCounter, 1413 mSDsluCounter, 1013 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1413 SdHoareTripleChecker+Valid, 3210 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:27:45,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1413 Valid, 3210 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:27:45,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12622 states. [2022-11-23 15:27:46,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12622 to 12620. [2022-11-23 15:27:46,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12620 states, 12619 states have (on average 1.3630240114113639) internal successors, (17200), 12619 states have internal predecessors, (17200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:27:46,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12620 states to 12620 states and 17200 transitions. [2022-11-23 15:27:46,799 INFO L78 Accepts]: Start accepts. Automaton has 12620 states and 17200 transitions. Word has length 79 [2022-11-23 15:27:46,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:27:46,800 INFO L495 AbstractCegarLoop]: Abstraction has 12620 states and 17200 transitions. [2022-11-23 15:27:46,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:27:46,800 INFO L276 IsEmpty]: Start isEmpty. Operand 12620 states and 17200 transitions. [2022-11-23 15:27:46,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-23 15:27:46,814 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:27:46,815 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:27:46,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-23 15:27:46,815 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:27:46,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:27:46,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1253382368, now seen corresponding path program 1 times [2022-11-23 15:27:46,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:27:46,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313270864] [2022-11-23 15:27:46,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:27:46,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:27:46,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:27:47,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:27:47,069 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:27:47,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313270864] [2022-11-23 15:27:47,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313270864] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:27:47,070 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:27:47,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 15:27:47,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621951613] [2022-11-23 15:27:47,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:27:47,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:27:47,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:27:47,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:27:47,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:27:47,072 INFO L87 Difference]: Start difference. First operand 12620 states and 17200 transitions. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:27:49,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:27:49,499 INFO L93 Difference]: Finished difference Result 32151 states and 44543 transitions. [2022-11-23 15:27:49,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 15:27:49,503 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2022-11-23 15:27:49,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:27:49,576 INFO L225 Difference]: With dead ends: 32151 [2022-11-23 15:27:49,576 INFO L226 Difference]: Without dead ends: 20313 [2022-11-23 15:27:49,594 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-23 15:27:49,594 INFO L413 NwaCegarLoop]: 766 mSDtfsCounter, 4109 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 639 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4109 SdHoareTripleChecker+Valid, 934 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-23 15:27:49,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4109 Valid, 934 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 639 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-23 15:27:49,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20313 states. [2022-11-23 15:27:51,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20313 to 20311. [2022-11-23 15:27:51,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20311 states, 20310 states have (on average 1.378138847858198) internal successors, (27990), 20310 states have internal predecessors, (27990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:27:51,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20311 states to 20311 states and 27990 transitions. [2022-11-23 15:27:51,536 INFO L78 Accepts]: Start accepts. Automaton has 20311 states and 27990 transitions. Word has length 79 [2022-11-23 15:27:51,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:27:51,536 INFO L495 AbstractCegarLoop]: Abstraction has 20311 states and 27990 transitions. [2022-11-23 15:27:51,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:27:51,537 INFO L276 IsEmpty]: Start isEmpty. Operand 20311 states and 27990 transitions. [2022-11-23 15:27:51,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-23 15:27:51,556 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:27:51,556 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:27:51,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-23 15:27:51,557 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:27:51,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:27:51,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1054519687, now seen corresponding path program 1 times [2022-11-23 15:27:51,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:27:51,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192031290] [2022-11-23 15:27:51,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:27:51,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:27:51,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:27:51,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:27:51,687 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:27:51,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192031290] [2022-11-23 15:27:51,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192031290] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:27:51,687 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:27:51,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:27:51,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817947578] [2022-11-23 15:27:51,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:27:51,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:27:51,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:27:51,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:27:51,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:27:51,690 INFO L87 Difference]: Start difference. First operand 20311 states and 27990 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:27:54,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:27:54,812 INFO L93 Difference]: Finished difference Result 50338 states and 70053 transitions. [2022-11-23 15:27:54,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:27:54,813 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-11-23 15:27:54,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:27:54,919 INFO L225 Difference]: With dead ends: 50338 [2022-11-23 15:27:54,920 INFO L226 Difference]: Without dead ends: 33795 [2022-11-23 15:27:54,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:27:54,949 INFO L413 NwaCegarLoop]: 1620 mSDtfsCounter, 1024 mSDsluCounter, 826 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1024 SdHoareTripleChecker+Valid, 2446 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:27:54,950 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1024 Valid, 2446 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:27:54,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33795 states. [2022-11-23 15:27:58,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33795 to 33793. [2022-11-23 15:27:58,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33793 states, 33792 states have (on average 1.3756214488636365) internal successors, (46485), 33792 states have internal predecessors, (46485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:27:58,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33793 states to 33793 states and 46485 transitions. [2022-11-23 15:27:58,193 INFO L78 Accepts]: Start accepts. Automaton has 33793 states and 46485 transitions. Word has length 80 [2022-11-23 15:27:58,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:27:58,194 INFO L495 AbstractCegarLoop]: Abstraction has 33793 states and 46485 transitions. [2022-11-23 15:27:58,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:27:58,194 INFO L276 IsEmpty]: Start isEmpty. Operand 33793 states and 46485 transitions. [2022-11-23 15:27:58,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-23 15:27:58,213 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:27:58,213 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:27:58,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-23 15:27:58,213 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:27:58,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:27:58,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1231479032, now seen corresponding path program 1 times [2022-11-23 15:27:58,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:27:58,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264888206] [2022-11-23 15:27:58,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:27:58,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:27:58,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:27:58,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:27:58,404 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:27:58,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264888206] [2022-11-23 15:27:58,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264888206] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:27:58,404 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:27:58,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 15:27:58,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953642890] [2022-11-23 15:27:58,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:27:58,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:27:58,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:27:58,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:27:58,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:27:58,406 INFO L87 Difference]: Start difference. First operand 33793 states and 46485 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:28:06,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:28:06,908 INFO L93 Difference]: Finished difference Result 91056 states and 126266 transitions. [2022-11-23 15:28:06,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 15:28:06,908 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2022-11-23 15:28:06,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:28:07,080 INFO L225 Difference]: With dead ends: 91056 [2022-11-23 15:28:07,080 INFO L226 Difference]: Without dead ends: 58534 [2022-11-23 15:28:07,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-23 15:28:07,127 INFO L413 NwaCegarLoop]: 617 mSDtfsCounter, 3528 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3528 SdHoareTripleChecker+Valid, 765 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-23 15:28:07,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3528 Valid, 765 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-23 15:28:07,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58534 states. [2022-11-23 15:28:13,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58534 to 58532. [2022-11-23 15:28:13,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58532 states, 58531 states have (on average 1.3792178503698895) internal successors, (80727), 58531 states have internal predecessors, (80727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:28:13,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58532 states to 58532 states and 80727 transitions. [2022-11-23 15:28:13,545 INFO L78 Accepts]: Start accepts. Automaton has 58532 states and 80727 transitions. Word has length 81 [2022-11-23 15:28:13,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:28:13,545 INFO L495 AbstractCegarLoop]: Abstraction has 58532 states and 80727 transitions. [2022-11-23 15:28:13,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:28:13,546 INFO L276 IsEmpty]: Start isEmpty. Operand 58532 states and 80727 transitions. [2022-11-23 15:28:13,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-23 15:28:13,572 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:28:13,572 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:28:13,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-23 15:28:13,573 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:28:13,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:28:13,574 INFO L85 PathProgramCache]: Analyzing trace with hash -611340285, now seen corresponding path program 1 times [2022-11-23 15:28:13,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:28:13,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047672368] [2022-11-23 15:28:13,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:28:13,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:28:13,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:28:13,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:28:13,865 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:28:13,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047672368] [2022-11-23 15:28:13,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047672368] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:28:13,865 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:28:13,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-23 15:28:13,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730912941] [2022-11-23 15:28:13,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:28:13,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 15:28:13,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:28:13,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 15:28:13,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-23 15:28:13,867 INFO L87 Difference]: Start difference. First operand 58532 states and 80727 transitions. Second operand has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)