./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/mem_slave_tlm.5.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b677fca8-fdd2-4523-a672-2852e12f73c4/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b677fca8-fdd2-4523-a672-2852e12f73c4/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b677fca8-fdd2-4523-a672-2852e12f73c4/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b677fca8-fdd2-4523-a672-2852e12f73c4/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/mem_slave_tlm.5.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b677fca8-fdd2-4523-a672-2852e12f73c4/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b677fca8-fdd2-4523-a672-2852e12f73c4/bin/utaipan-UUZaoUuFF8 --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 067fe51884f92ae3774f211cf9d4291369df85b7690d3eee54cd23a70c2ea301 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:19:49,403 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:19:49,405 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:19:49,457 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:19:49,458 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:19:49,462 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:19:49,464 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:19:49,468 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:19:49,471 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:19:49,479 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:19:49,480 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:19:49,482 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:19:49,482 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:19:49,486 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:19:49,488 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:19:49,494 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:19:49,495 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:19:49,496 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:19:49,499 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:19:49,501 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:19:49,503 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:19:49,505 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:19:49,506 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:19:49,507 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:19:49,511 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:19:49,511 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:19:49,511 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:19:49,512 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:19:49,513 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:19:49,514 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:19:49,514 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:19:49,515 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:19:49,516 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:19:49,517 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:19:49,518 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:19:49,518 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:19:49,519 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:19:49,519 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:19:49,520 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:19:49,521 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:19:49,521 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:19:49,522 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b677fca8-fdd2-4523-a672-2852e12f73c4/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:19:49,548 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:19:49,548 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:19:49,549 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:19:49,550 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:19:49,550 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:19:49,550 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:19:49,550 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:19:49,550 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:19:49,551 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:19:49,551 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:19:49,551 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:19:49,551 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:19:49,551 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:19:49,552 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:19:49,552 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:19:49,553 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:19:49,553 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:19:49,553 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:19:49,553 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:19:49,553 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:19:49,554 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:19:49,554 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:19:49,554 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:19:49,554 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:19:49,555 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:19:49,555 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:19:49,555 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:19:49,555 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:19:49,556 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:19:49,556 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:19:49,556 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:19:49,556 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:19:49,557 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:19:49,557 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:19:49,557 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:19:49,557 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:19:49,558 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:19:49,558 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:19:49,558 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:19:49,558 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_b677fca8-fdd2-4523-a672-2852e12f73c4/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b677fca8-fdd2-4523-a672-2852e12f73c4/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 067fe51884f92ae3774f211cf9d4291369df85b7690d3eee54cd23a70c2ea301 [2021-11-07 01:19:49,820 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:19:49,842 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:19:49,844 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:19:49,846 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:19:49,846 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:19:49,847 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b677fca8-fdd2-4523-a672-2852e12f73c4/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/systemc/mem_slave_tlm.5.cil.c [2021-11-07 01:19:49,930 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b677fca8-fdd2-4523-a672-2852e12f73c4/bin/utaipan-UUZaoUuFF8/data/7dca88417/34ce5bf2545247eca28cada4442436ad/FLAG6f1caf970 [2021-11-07 01:19:50,552 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:19:50,553 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b677fca8-fdd2-4523-a672-2852e12f73c4/sv-benchmarks/c/systemc/mem_slave_tlm.5.cil.c [2021-11-07 01:19:50,571 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b677fca8-fdd2-4523-a672-2852e12f73c4/bin/utaipan-UUZaoUuFF8/data/7dca88417/34ce5bf2545247eca28cada4442436ad/FLAG6f1caf970 [2021-11-07 01:19:50,839 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b677fca8-fdd2-4523-a672-2852e12f73c4/bin/utaipan-UUZaoUuFF8/data/7dca88417/34ce5bf2545247eca28cada4442436ad [2021-11-07 01:19:50,842 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:19:50,844 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:19:50,849 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:19:50,849 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:19:50,853 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:19:50,854 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:19:50" (1/1) ... [2021-11-07 01:19:50,859 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49d71d09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:19:50, skipping insertion in model container [2021-11-07 01:19:50,859 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:19:50" (1/1) ... [2021-11-07 01:19:50,867 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:19:50,923 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:19:51,120 WARN L228 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_b677fca8-fdd2-4523-a672-2852e12f73c4/sv-benchmarks/c/systemc/mem_slave_tlm.5.cil.c[646,659] [2021-11-07 01:19:51,233 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:19:51,252 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:19:51,267 WARN L228 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_b677fca8-fdd2-4523-a672-2852e12f73c4/sv-benchmarks/c/systemc/mem_slave_tlm.5.cil.c[646,659] [2021-11-07 01:19:51,347 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:19:51,365 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:19:51,365 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:19:51 WrapperNode [2021-11-07 01:19:51,366 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:19:51,367 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:19:51,367 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:19:51,367 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:19:51,375 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:19:51" (1/1) ... [2021-11-07 01:19:51,389 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:19:51" (1/1) ... [2021-11-07 01:19:51,443 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:19:51,450 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:19:51,452 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:19:51,452 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:19:51,464 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:19:51" (1/1) ... [2021-11-07 01:19:51,465 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:19:51" (1/1) ... [2021-11-07 01:19:51,483 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:19:51" (1/1) ... [2021-11-07 01:19:51,483 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:19:51" (1/1) ... [2021-11-07 01:19:51,503 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:19:51" (1/1) ... [2021-11-07 01:19:51,525 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:19:51" (1/1) ... [2021-11-07 01:19:51,529 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:19:51" (1/1) ... [2021-11-07 01:19:51,535 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:19:51,536 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:19:51,536 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:19:51,536 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:19:51,553 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:19:51" (1/1) ... [2021-11-07 01:19:51,561 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:19:51,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b677fca8-fdd2-4523-a672-2852e12f73c4/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:19:51,606 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b677fca8-fdd2-4523-a672-2852e12f73c4/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:19:51,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b677fca8-fdd2-4523-a672-2852e12f73c4/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:19:51,673 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 01:19:51,673 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:19:51,675 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:19:51,675 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:19:53,133 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:19:53,133 INFO L299 CfgBuilder]: Removed 39 assume(true) statements. [2021-11-07 01:19:53,137 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:19:53 BoogieIcfgContainer [2021-11-07 01:19:53,137 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:19:53,140 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:19:53,141 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:19:53,145 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:19:53,145 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:19:50" (1/3) ... [2021-11-07 01:19:53,147 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ce28c3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:19:53, skipping insertion in model container [2021-11-07 01:19:53,147 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:19:51" (2/3) ... [2021-11-07 01:19:53,147 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ce28c3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:19:53, skipping insertion in model container [2021-11-07 01:19:53,147 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:19:53" (3/3) ... [2021-11-07 01:19:53,151 INFO L111 eAbstractionObserver]: Analyzing ICFG mem_slave_tlm.5.cil.c [2021-11-07 01:19:53,158 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:19:53,158 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-11-07 01:19:53,203 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:19:53,210 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 01:19:53,210 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-11-07 01:19:53,231 INFO L276 IsEmpty]: Start isEmpty. Operand has 233 states, 227 states have (on average 1.7973568281938326) internal successors, (408), 232 states have internal predecessors, (408), 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) [2021-11-07 01:19:53,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-07 01:19:53,240 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:19:53,241 INFO L513 BasicCegarLoop]: 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] [2021-11-07 01:19:53,242 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:19:53,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:19:53,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1272201908, now seen corresponding path program 1 times [2021-11-07 01:19:53,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:19:53,257 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567591493] [2021-11-07 01:19:53,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:19:53,258 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:19:53,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:19:53,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:19:53,443 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:19:53,444 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567591493] [2021-11-07 01:19:53,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567591493] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:19:53,445 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:19:53,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 01:19:53,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939434005] [2021-11-07 01:19:53,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:19:53,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:19:53,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:19:53,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:19:53,469 INFO L87 Difference]: Start difference. First operand has 233 states, 227 states have (on average 1.7973568281938326) internal successors, (408), 232 states have internal predecessors, (408), 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 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 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) [2021-11-07 01:19:53,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:19:53,899 INFO L93 Difference]: Finished difference Result 626 states and 1082 transitions. [2021-11-07 01:19:53,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:19:53,901 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 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 23 [2021-11-07 01:19:53,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:19:53,920 INFO L225 Difference]: With dead ends: 626 [2021-11-07 01:19:53,920 INFO L226 Difference]: Without dead ends: 391 [2021-11-07 01:19:53,924 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:19:53,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-11-07 01:19:54,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 381. [2021-11-07 01:19:54,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 376 states have (on average 1.5452127659574468) internal successors, (581), 380 states have internal predecessors, (581), 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) [2021-11-07 01:19:54,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 581 transitions. [2021-11-07 01:19:54,046 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 581 transitions. Word has length 23 [2021-11-07 01:19:54,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:19:54,047 INFO L470 AbstractCegarLoop]: Abstraction has 381 states and 581 transitions. [2021-11-07 01:19:54,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 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) [2021-11-07 01:19:54,047 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 581 transitions. [2021-11-07 01:19:54,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-07 01:19:54,054 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:19:54,054 INFO L513 BasicCegarLoop]: 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] [2021-11-07 01:19:54,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 01:19:54,057 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:19:54,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:19:54,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1826153134, now seen corresponding path program 1 times [2021-11-07 01:19:54,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:19:54,062 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884554143] [2021-11-07 01:19:54,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:19:54,062 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:19:54,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:19:54,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:19:54,170 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:19:54,171 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884554143] [2021-11-07 01:19:54,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884554143] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:19:54,171 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:19:54,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:19:54,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853314430] [2021-11-07 01:19:54,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:19:54,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:19:54,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:19:54,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:19:54,174 INFO L87 Difference]: Start difference. First operand 381 states and 581 transitions. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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) [2021-11-07 01:19:54,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:19:54,360 INFO L93 Difference]: Finished difference Result 995 states and 1544 transitions. [2021-11-07 01:19:54,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:19:54,362 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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 36 [2021-11-07 01:19:54,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:19:54,366 INFO L225 Difference]: With dead ends: 995 [2021-11-07 01:19:54,367 INFO L226 Difference]: Without dead ends: 624 [2021-11-07 01:19:54,372 INFO L786 BasicCegarLoop]: 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 [2021-11-07 01:19:54,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2021-11-07 01:19:54,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 614. [2021-11-07 01:19:54,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 609 states have (on average 1.5845648604269293) internal successors, (965), 613 states have internal predecessors, (965), 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) [2021-11-07 01:19:54,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 965 transitions. [2021-11-07 01:19:54,415 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 965 transitions. Word has length 36 [2021-11-07 01:19:54,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:19:54,415 INFO L470 AbstractCegarLoop]: Abstraction has 614 states and 965 transitions. [2021-11-07 01:19:54,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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) [2021-11-07 01:19:54,416 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 965 transitions. [2021-11-07 01:19:54,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-07 01:19:54,419 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:19:54,419 INFO L513 BasicCegarLoop]: 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] [2021-11-07 01:19:54,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 01:19:54,420 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:19:54,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:19:54,420 INFO L85 PathProgramCache]: Analyzing trace with hash 253570269, now seen corresponding path program 1 times [2021-11-07 01:19:54,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:19:54,421 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475387273] [2021-11-07 01:19:54,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:19:54,422 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:19:54,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:19:54,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:19:54,514 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:19:54,514 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475387273] [2021-11-07 01:19:54,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475387273] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:19:54,515 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:19:54,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 01:19:54,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179377129] [2021-11-07 01:19:54,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:19:54,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:19:54,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:19:54,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:19:54,517 INFO L87 Difference]: Start difference. First operand 614 states and 965 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 2 states have internal predecessors, (37), 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) [2021-11-07 01:19:54,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:19:54,566 INFO L93 Difference]: Finished difference Result 1548 states and 2436 transitions. [2021-11-07 01:19:54,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:19:54,567 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 2 states have internal predecessors, (37), 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 37 [2021-11-07 01:19:54,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:19:54,573 INFO L225 Difference]: With dead ends: 1548 [2021-11-07 01:19:54,574 INFO L226 Difference]: Without dead ends: 944 [2021-11-07 01:19:54,575 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:19:54,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 944 states. [2021-11-07 01:19:54,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 944 to 932. [2021-11-07 01:19:54,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 932 states, 927 states have (on average 1.5792880258899675) internal successors, (1464), 931 states have internal predecessors, (1464), 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) [2021-11-07 01:19:54,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 932 states to 932 states and 1464 transitions. [2021-11-07 01:19:54,637 INFO L78 Accepts]: Start accepts. Automaton has 932 states and 1464 transitions. Word has length 37 [2021-11-07 01:19:54,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:19:54,638 INFO L470 AbstractCegarLoop]: Abstraction has 932 states and 1464 transitions. [2021-11-07 01:19:54,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 2 states have internal predecessors, (37), 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) [2021-11-07 01:19:54,638 INFO L276 IsEmpty]: Start isEmpty. Operand 932 states and 1464 transitions. [2021-11-07 01:19:54,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-07 01:19:54,640 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:19:54,640 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:19:54,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-07 01:19:54,640 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:19:54,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:19:54,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1505380085, now seen corresponding path program 1 times [2021-11-07 01:19:54,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:19:54,641 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30198352] [2021-11-07 01:19:54,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:19:54,642 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:19:54,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:19:54,719 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:19:54,719 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:19:54,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30198352] [2021-11-07 01:19:54,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30198352] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:19:54,720 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:19:54,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:19:54,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797324378] [2021-11-07 01:19:54,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:19:54,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:19:54,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:19:54,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:19:54,722 INFO L87 Difference]: Start difference. First operand 932 states and 1464 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 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) [2021-11-07 01:19:55,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:19:55,218 INFO L93 Difference]: Finished difference Result 3344 states and 5288 transitions. [2021-11-07 01:19:55,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:19:55,219 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 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 39 [2021-11-07 01:19:55,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:19:55,236 INFO L225 Difference]: With dead ends: 3344 [2021-11-07 01:19:55,236 INFO L226 Difference]: Without dead ends: 2422 [2021-11-07 01:19:55,238 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:19:55,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2422 states. [2021-11-07 01:19:55,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2422 to 1964. [2021-11-07 01:19:55,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1964 states, 1959 states have (on average 1.5875446656457377) internal successors, (3110), 1963 states have internal predecessors, (3110), 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) [2021-11-07 01:19:55,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1964 states to 1964 states and 3110 transitions. [2021-11-07 01:19:55,348 INFO L78 Accepts]: Start accepts. Automaton has 1964 states and 3110 transitions. Word has length 39 [2021-11-07 01:19:55,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:19:55,349 INFO L470 AbstractCegarLoop]: Abstraction has 1964 states and 3110 transitions. [2021-11-07 01:19:55,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 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) [2021-11-07 01:19:55,349 INFO L276 IsEmpty]: Start isEmpty. Operand 1964 states and 3110 transitions. [2021-11-07 01:19:55,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-07 01:19:55,351 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:19:55,351 INFO L513 BasicCegarLoop]: 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] [2021-11-07 01:19:55,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-07 01:19:55,352 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:19:55,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:19:55,352 INFO L85 PathProgramCache]: Analyzing trace with hash 337172877, now seen corresponding path program 1 times [2021-11-07 01:19:55,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:19:55,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393559886] [2021-11-07 01:19:55,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:19:55,353 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:19:55,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:19:55,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:19:55,409 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:19:55,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393559886] [2021-11-07 01:19:55,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393559886] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:19:55,410 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:19:55,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:19:55,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342796321] [2021-11-07 01:19:55,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:19:55,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:19:55,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:19:55,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:19:55,412 INFO L87 Difference]: Start difference. First operand 1964 states and 3110 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 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) [2021-11-07 01:19:55,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:19:55,919 INFO L93 Difference]: Finished difference Result 5867 states and 9187 transitions. [2021-11-07 01:19:55,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:19:55,919 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 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 47 [2021-11-07 01:19:55,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:19:55,943 INFO L225 Difference]: With dead ends: 5867 [2021-11-07 01:19:55,944 INFO L226 Difference]: Without dead ends: 3911 [2021-11-07 01:19:55,947 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:19:55,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3911 states. [2021-11-07 01:19:56,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3911 to 3559. [2021-11-07 01:19:56,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3559 states, 3554 states have (on average 1.5599324704558244) internal successors, (5544), 3558 states have internal predecessors, (5544), 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) [2021-11-07 01:19:56,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3559 states to 3559 states and 5544 transitions. [2021-11-07 01:19:56,135 INFO L78 Accepts]: Start accepts. Automaton has 3559 states and 5544 transitions. Word has length 47 [2021-11-07 01:19:56,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:19:56,136 INFO L470 AbstractCegarLoop]: Abstraction has 3559 states and 5544 transitions. [2021-11-07 01:19:56,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 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) [2021-11-07 01:19:56,136 INFO L276 IsEmpty]: Start isEmpty. Operand 3559 states and 5544 transitions. [2021-11-07 01:19:56,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-07 01:19:56,137 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:19:56,138 INFO L513 BasicCegarLoop]: 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] [2021-11-07 01:19:56,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-07 01:19:56,138 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:19:56,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:19:56,139 INFO L85 PathProgramCache]: Analyzing trace with hash 2070890081, now seen corresponding path program 1 times [2021-11-07 01:19:56,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:19:56,139 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132631401] [2021-11-07 01:19:56,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:19:56,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:19:56,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:19:56,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:19:56,184 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:19:56,184 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132631401] [2021-11-07 01:19:56,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132631401] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:19:56,185 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:19:56,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 01:19:56,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950176283] [2021-11-07 01:19:56,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:19:56,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:19:56,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:19:56,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:19:56,187 INFO L87 Difference]: Start difference. First operand 3559 states and 5544 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 2 states have internal predecessors, (47), 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) [2021-11-07 01:19:56,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:19:56,441 INFO L93 Difference]: Finished difference Result 8503 states and 13215 transitions. [2021-11-07 01:19:56,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:19:56,442 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 2 states have internal predecessors, (47), 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 47 [2021-11-07 01:19:56,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:19:56,472 INFO L225 Difference]: With dead ends: 8503 [2021-11-07 01:19:56,473 INFO L226 Difference]: Without dead ends: 4953 [2021-11-07 01:19:56,479 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:19:56,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4953 states. [2021-11-07 01:19:56,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4953 to 4691. [2021-11-07 01:19:56,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4691 states, 4686 states have (on average 1.5467349551856595) internal successors, (7248), 4690 states have internal predecessors, (7248), 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) [2021-11-07 01:19:56,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4691 states to 4691 states and 7248 transitions. [2021-11-07 01:19:56,742 INFO L78 Accepts]: Start accepts. Automaton has 4691 states and 7248 transitions. Word has length 47 [2021-11-07 01:19:56,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:19:56,743 INFO L470 AbstractCegarLoop]: Abstraction has 4691 states and 7248 transitions. [2021-11-07 01:19:56,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 2 states have internal predecessors, (47), 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) [2021-11-07 01:19:56,743 INFO L276 IsEmpty]: Start isEmpty. Operand 4691 states and 7248 transitions. [2021-11-07 01:19:56,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-07 01:19:56,746 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:19:56,746 INFO L513 BasicCegarLoop]: 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] [2021-11-07 01:19:56,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-07 01:19:56,746 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:19:56,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:19:56,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1765082660, now seen corresponding path program 1 times [2021-11-07 01:19:56,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:19:56,748 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191387550] [2021-11-07 01:19:56,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:19:56,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:19:56,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:19:56,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:19:56,788 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:19:56,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191387550] [2021-11-07 01:19:56,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191387550] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:19:56,789 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:19:56,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:19:56,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344272318] [2021-11-07 01:19:56,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:19:56,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:19:56,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:19:56,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:19:56,791 INFO L87 Difference]: Start difference. First operand 4691 states and 7248 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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) [2021-11-07 01:19:57,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:19:57,364 INFO L93 Difference]: Finished difference Result 11405 states and 17634 transitions. [2021-11-07 01:19:57,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:19:57,364 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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 54 [2021-11-07 01:19:57,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:19:57,409 INFO L225 Difference]: With dead ends: 11405 [2021-11-07 01:19:57,409 INFO L226 Difference]: Without dead ends: 6723 [2021-11-07 01:19:57,419 INFO L786 BasicCegarLoop]: 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 [2021-11-07 01:19:57,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6723 states. [2021-11-07 01:19:57,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6723 to 5440. [2021-11-07 01:19:57,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5440 states, 5435 states have (on average 1.493836246550138) internal successors, (8119), 5439 states have internal predecessors, (8119), 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) [2021-11-07 01:19:57,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5440 states to 5440 states and 8119 transitions. [2021-11-07 01:19:57,758 INFO L78 Accepts]: Start accepts. Automaton has 5440 states and 8119 transitions. Word has length 54 [2021-11-07 01:19:57,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:19:57,761 INFO L470 AbstractCegarLoop]: Abstraction has 5440 states and 8119 transitions. [2021-11-07 01:19:57,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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) [2021-11-07 01:19:57,762 INFO L276 IsEmpty]: Start isEmpty. Operand 5440 states and 8119 transitions. [2021-11-07 01:19:57,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-07 01:19:57,765 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:19:57,765 INFO L513 BasicCegarLoop]: 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] [2021-11-07 01:19:57,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-07 01:19:57,766 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:19:57,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:19:57,767 INFO L85 PathProgramCache]: Analyzing trace with hash -984149808, now seen corresponding path program 1 times [2021-11-07 01:19:57,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:19:57,767 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049845498] [2021-11-07 01:19:57,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:19:57,767 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:19:57,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:19:57,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:19:57,880 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:19:57,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049845498] [2021-11-07 01:19:57,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049845498] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:19:57,880 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:19:57,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 01:19:57,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31935578] [2021-11-07 01:19:57,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:19:57,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:19:57,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:19:57,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:19:57,882 INFO L87 Difference]: Start difference. First operand 5440 states and 8119 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 2 states have internal predecessors, (56), 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) [2021-11-07 01:19:58,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:19:58,203 INFO L93 Difference]: Finished difference Result 10746 states and 16072 transitions. [2021-11-07 01:19:58,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:19:58,204 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 2 states have internal predecessors, (56), 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 56 [2021-11-07 01:19:58,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:19:58,238 INFO L225 Difference]: With dead ends: 10746 [2021-11-07 01:19:58,239 INFO L226 Difference]: Without dead ends: 5315 [2021-11-07 01:19:58,279 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:19:58,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5315 states. [2021-11-07 01:19:58,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5315 to 5315. [2021-11-07 01:19:58,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5315 states, 5310 states have (on average 1.4900188323917138) internal successors, (7912), 5314 states have internal predecessors, (7912), 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) [2021-11-07 01:19:58,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5315 states to 5315 states and 7912 transitions. [2021-11-07 01:19:58,623 INFO L78 Accepts]: Start accepts. Automaton has 5315 states and 7912 transitions. Word has length 56 [2021-11-07 01:19:58,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:19:58,623 INFO L470 AbstractCegarLoop]: Abstraction has 5315 states and 7912 transitions. [2021-11-07 01:19:58,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 2 states have internal predecessors, (56), 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) [2021-11-07 01:19:58,624 INFO L276 IsEmpty]: Start isEmpty. Operand 5315 states and 7912 transitions. [2021-11-07 01:19:58,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-07 01:19:58,627 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:19:58,628 INFO L513 BasicCegarLoop]: 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] [2021-11-07 01:19:58,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-07 01:19:58,628 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:19:58,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:19:58,629 INFO L85 PathProgramCache]: Analyzing trace with hash -49023140, now seen corresponding path program 1 times [2021-11-07 01:19:58,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:19:58,630 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933957708] [2021-11-07 01:19:58,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:19:58,630 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:19:58,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:19:58,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:19:58,694 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:19:58,694 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933957708] [2021-11-07 01:19:58,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933957708] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:19:58,695 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:19:58,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:19:58,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244295793] [2021-11-07 01:19:58,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:19:58,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:19:58,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:19:58,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:19:58,697 INFO L87 Difference]: Start difference. First operand 5315 states and 7912 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 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) [2021-11-07 01:19:59,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:19:59,143 INFO L93 Difference]: Finished difference Result 12071 states and 18213 transitions. [2021-11-07 01:19:59,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:19:59,146 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 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 57 [2021-11-07 01:19:59,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:19:59,178 INFO L225 Difference]: With dead ends: 12071 [2021-11-07 01:19:59,178 INFO L226 Difference]: Without dead ends: 6765 [2021-11-07 01:19:59,189 INFO L786 BasicCegarLoop]: 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 [2021-11-07 01:19:59,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6765 states. [2021-11-07 01:19:59,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6765 to 4171. [2021-11-07 01:19:59,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4171 states, 4166 states have (on average 1.5124819971195391) internal successors, (6301), 4170 states have internal predecessors, (6301), 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) [2021-11-07 01:19:59,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4171 states to 4171 states and 6301 transitions. [2021-11-07 01:19:59,455 INFO L78 Accepts]: Start accepts. Automaton has 4171 states and 6301 transitions. Word has length 57 [2021-11-07 01:19:59,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:19:59,456 INFO L470 AbstractCegarLoop]: Abstraction has 4171 states and 6301 transitions. [2021-11-07 01:19:59,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 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) [2021-11-07 01:19:59,457 INFO L276 IsEmpty]: Start isEmpty. Operand 4171 states and 6301 transitions. [2021-11-07 01:19:59,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-07 01:19:59,458 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:19:59,459 INFO L513 BasicCegarLoop]: 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] [2021-11-07 01:19:59,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-07 01:19:59,459 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:19:59,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:19:59,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1607833470, now seen corresponding path program 1 times [2021-11-07 01:19:59,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:19:59,462 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431034013] [2021-11-07 01:19:59,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:19:59,463 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:19:59,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:19:59,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:19:59,540 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:19:59,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431034013] [2021-11-07 01:19:59,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431034013] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:19:59,541 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:19:59,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-07 01:19:59,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911779512] [2021-11-07 01:19:59,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:19:59,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:19:59,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:19:59,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:19:59,543 INFO L87 Difference]: Start difference. First operand 4171 states and 6301 transitions. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 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) [2021-11-07 01:20:00,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:20:00,953 INFO L93 Difference]: Finished difference Result 22439 states and 33707 transitions. [2021-11-07 01:20:00,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-07 01:20:00,953 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 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 59 [2021-11-07 01:20:00,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:20:01,008 INFO L225 Difference]: With dead ends: 22439 [2021-11-07 01:20:01,008 INFO L226 Difference]: Without dead ends: 18338 [2021-11-07 01:20:01,017 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-11-07 01:20:01,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18338 states. [2021-11-07 01:20:01,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18338 to 5621. [2021-11-07 01:20:01,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5621 states, 5616 states have (on average 1.5040954415954415) internal successors, (8447), 5620 states have internal predecessors, (8447), 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) [2021-11-07 01:20:01,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5621 states to 5621 states and 8447 transitions. [2021-11-07 01:20:01,586 INFO L78 Accepts]: Start accepts. Automaton has 5621 states and 8447 transitions. Word has length 59 [2021-11-07 01:20:01,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:20:01,587 INFO L470 AbstractCegarLoop]: Abstraction has 5621 states and 8447 transitions. [2021-11-07 01:20:01,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 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) [2021-11-07 01:20:01,587 INFO L276 IsEmpty]: Start isEmpty. Operand 5621 states and 8447 transitions. [2021-11-07 01:20:01,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 01:20:01,589 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:20:01,589 INFO L513 BasicCegarLoop]: 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] [2021-11-07 01:20:01,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-07 01:20:01,590 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:20:01,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:20:01,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1530272021, now seen corresponding path program 1 times [2021-11-07 01:20:01,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:20:01,591 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170883131] [2021-11-07 01:20:01,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:20:01,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:20:01,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:20:01,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:20:01,662 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:20:01,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170883131] [2021-11-07 01:20:01,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170883131] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:20:01,663 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:20:01,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 01:20:01,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979477739] [2021-11-07 01:20:01,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:20:01,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:20:01,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:20:01,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:20:01,668 INFO L87 Difference]: Start difference. First operand 5621 states and 8447 transitions. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 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) [2021-11-07 01:20:04,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:20:04,109 INFO L93 Difference]: Finished difference Result 40039 states and 59628 transitions. [2021-11-07 01:20:04,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-07 01:20:04,110 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 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 60 [2021-11-07 01:20:04,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:20:04,231 INFO L225 Difference]: With dead ends: 40039 [2021-11-07 01:20:04,231 INFO L226 Difference]: Without dead ends: 34488 [2021-11-07 01:20:04,251 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=658, Unknown=0, NotChecked=0, Total=870 [2021-11-07 01:20:04,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34488 states. [2021-11-07 01:20:05,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34488 to 5947. [2021-11-07 01:20:05,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5947 states, 5942 states have (on average 1.4929316728374284) internal successors, (8871), 5946 states have internal predecessors, (8871), 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) [2021-11-07 01:20:05,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5947 states to 5947 states and 8871 transitions. [2021-11-07 01:20:05,235 INFO L78 Accepts]: Start accepts. Automaton has 5947 states and 8871 transitions. Word has length 60 [2021-11-07 01:20:05,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:20:05,235 INFO L470 AbstractCegarLoop]: Abstraction has 5947 states and 8871 transitions. [2021-11-07 01:20:05,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 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) [2021-11-07 01:20:05,236 INFO L276 IsEmpty]: Start isEmpty. Operand 5947 states and 8871 transitions. [2021-11-07 01:20:05,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 01:20:05,238 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:20:05,238 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:20:05,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-07 01:20:05,239 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:20:05,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:20:05,239 INFO L85 PathProgramCache]: Analyzing trace with hash 1552312634, now seen corresponding path program 1 times [2021-11-07 01:20:05,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:20:05,240 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314783062] [2021-11-07 01:20:05,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:20:05,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:20:05,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:20:05,292 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:20:05,292 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:20:05,293 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314783062] [2021-11-07 01:20:05,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314783062] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:20:05,295 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:20:05,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 01:20:05,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71363970] [2021-11-07 01:20:05,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:20:05,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:20:05,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:20:05,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:20:05,297 INFO L87 Difference]: Start difference. First operand 5947 states and 8871 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 2 states have internal predecessors, (70), 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) [2021-11-07 01:20:05,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:20:05,925 INFO L93 Difference]: Finished difference Result 12654 states and 18846 transitions. [2021-11-07 01:20:05,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:20:05,926 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 2 states have internal predecessors, (70), 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 70 [2021-11-07 01:20:05,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:20:05,942 INFO L225 Difference]: With dead ends: 12654 [2021-11-07 01:20:05,943 INFO L226 Difference]: Without dead ends: 6725 [2021-11-07 01:20:05,952 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:20:05,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6725 states. [2021-11-07 01:20:06,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6725 to 5997. [2021-11-07 01:20:06,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5997 states, 5992 states have (on average 1.4899866488651536) internal successors, (8928), 5996 states have internal predecessors, (8928), 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) [2021-11-07 01:20:06,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5997 states to 5997 states and 8928 transitions. [2021-11-07 01:20:06,449 INFO L78 Accepts]: Start accepts. Automaton has 5997 states and 8928 transitions. Word has length 70 [2021-11-07 01:20:06,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:20:06,450 INFO L470 AbstractCegarLoop]: Abstraction has 5997 states and 8928 transitions. [2021-11-07 01:20:06,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 2 states have internal predecessors, (70), 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) [2021-11-07 01:20:06,450 INFO L276 IsEmpty]: Start isEmpty. Operand 5997 states and 8928 transitions. [2021-11-07 01:20:06,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-07 01:20:06,452 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:20:06,453 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:20:06,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-07 01:20:06,453 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:20:06,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:20:06,454 INFO L85 PathProgramCache]: Analyzing trace with hash 525508529, now seen corresponding path program 1 times [2021-11-07 01:20:06,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:20:06,454 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303742992] [2021-11-07 01:20:06,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:20:06,455 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:20:06,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:20:06,498 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:20:06,498 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:20:06,498 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303742992] [2021-11-07 01:20:06,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303742992] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:20:06,500 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:20:06,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 01:20:06,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956709532] [2021-11-07 01:20:06,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:20:06,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:20:06,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:20:06,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:20:06,502 INFO L87 Difference]: Start difference. First operand 5997 states and 8928 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 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) [2021-11-07 01:20:07,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:20:07,441 INFO L93 Difference]: Finished difference Result 13711 states and 20319 transitions. [2021-11-07 01:20:07,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:20:07,442 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 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 [2021-11-07 01:20:07,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:20:07,463 INFO L225 Difference]: With dead ends: 13711 [2021-11-07 01:20:07,463 INFO L226 Difference]: Without dead ends: 7724 [2021-11-07 01:20:07,472 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:20:07,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7724 states. [2021-11-07 01:20:08,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7724 to 6864. [2021-11-07 01:20:08,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6864 states, 6859 states have (on average 1.4735384166788161) internal successors, (10107), 6863 states have internal predecessors, (10107), 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) [2021-11-07 01:20:08,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6864 states to 6864 states and 10107 transitions. [2021-11-07 01:20:08,052 INFO L78 Accepts]: Start accepts. Automaton has 6864 states and 10107 transitions. Word has length 80 [2021-11-07 01:20:08,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:20:08,052 INFO L470 AbstractCegarLoop]: Abstraction has 6864 states and 10107 transitions. [2021-11-07 01:20:08,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 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) [2021-11-07 01:20:08,053 INFO L276 IsEmpty]: Start isEmpty. Operand 6864 states and 10107 transitions. [2021-11-07 01:20:08,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-07 01:20:08,055 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:20:08,055 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:20:08,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-07 01:20:08,056 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:20:08,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:20:08,056 INFO L85 PathProgramCache]: Analyzing trace with hash 223072000, now seen corresponding path program 1 times [2021-11-07 01:20:08,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:20:08,057 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875520743] [2021-11-07 01:20:08,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:20:08,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:20:08,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:20:08,101 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:20:08,102 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:20:08,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875520743] [2021-11-07 01:20:08,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875520743] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:20:08,102 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:20:08,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:20:08,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125240454] [2021-11-07 01:20:08,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:20:08,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:20:08,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:20:08,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:20:08,104 INFO L87 Difference]: Start difference. First operand 6864 states and 10107 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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) [2021-11-07 01:20:08,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:20:08,445 INFO L93 Difference]: Finished difference Result 9971 states and 14759 transitions. [2021-11-07 01:20:08,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:20:08,451 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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 85 [2021-11-07 01:20:08,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:20:08,459 INFO L225 Difference]: With dead ends: 9971 [2021-11-07 01:20:08,459 INFO L226 Difference]: Without dead ends: 3148 [2021-11-07 01:20:08,469 INFO L786 BasicCegarLoop]: 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 [2021-11-07 01:20:08,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3148 states. [2021-11-07 01:20:08,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3148 to 3118. [2021-11-07 01:20:08,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3118 states, 3113 states have (on average 1.4140700289110184) internal successors, (4402), 3117 states have internal predecessors, (4402), 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) [2021-11-07 01:20:08,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3118 states to 3118 states and 4402 transitions. [2021-11-07 01:20:08,849 INFO L78 Accepts]: Start accepts. Automaton has 3118 states and 4402 transitions. Word has length 85 [2021-11-07 01:20:08,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:20:08,849 INFO L470 AbstractCegarLoop]: Abstraction has 3118 states and 4402 transitions. [2021-11-07 01:20:08,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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) [2021-11-07 01:20:08,850 INFO L276 IsEmpty]: Start isEmpty. Operand 3118 states and 4402 transitions. [2021-11-07 01:20:08,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-07 01:20:08,851 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:20:08,851 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:20:08,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-07 01:20:08,852 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:20:08,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:20:08,852 INFO L85 PathProgramCache]: Analyzing trace with hash 570147879, now seen corresponding path program 1 times [2021-11-07 01:20:08,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:20:08,853 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76919190] [2021-11-07 01:20:08,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:20:08,853 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:20:08,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:20:08,896 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:20:08,896 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:20:08,896 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76919190] [2021-11-07 01:20:08,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76919190] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:20:08,897 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:20:08,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 01:20:08,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146785845] [2021-11-07 01:20:08,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:20:08,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:20:08,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:20:08,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:20:08,898 INFO L87 Difference]: Start difference. First operand 3118 states and 4402 transitions. Second operand has 5 states, 5 states have (on average 18.0) internal successors, (90), 5 states have internal predecessors, (90), 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) [2021-11-07 01:20:09,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:20:09,873 INFO L93 Difference]: Finished difference Result 13176 states and 18647 transitions. [2021-11-07 01:20:09,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 01:20:09,873 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.0) internal successors, (90), 5 states have internal predecessors, (90), 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 90 [2021-11-07 01:20:09,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:20:09,894 INFO L225 Difference]: With dead ends: 13176 [2021-11-07 01:20:09,894 INFO L226 Difference]: Without dead ends: 10193 [2021-11-07 01:20:09,905 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:20:09,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10193 states. [2021-11-07 01:20:10,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10193 to 3120. [2021-11-07 01:20:10,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3120 states, 3115 states have (on average 1.409951845906902) internal successors, (4392), 3119 states have internal predecessors, (4392), 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) [2021-11-07 01:20:10,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3120 states to 3120 states and 4392 transitions. [2021-11-07 01:20:10,266 INFO L78 Accepts]: Start accepts. Automaton has 3120 states and 4392 transitions. Word has length 90 [2021-11-07 01:20:10,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:20:10,266 INFO L470 AbstractCegarLoop]: Abstraction has 3120 states and 4392 transitions. [2021-11-07 01:20:10,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.0) internal successors, (90), 5 states have internal predecessors, (90), 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) [2021-11-07 01:20:10,266 INFO L276 IsEmpty]: Start isEmpty. Operand 3120 states and 4392 transitions. [2021-11-07 01:20:10,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-07 01:20:10,268 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:20:10,268 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:20:10,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-07 01:20:10,269 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:20:10,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:20:10,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1598156222, now seen corresponding path program 1 times [2021-11-07 01:20:10,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:20:10,270 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061775143] [2021-11-07 01:20:10,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:20:10,270 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:20:10,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:20:10,320 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:20:10,320 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:20:10,320 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061775143] [2021-11-07 01:20:10,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061775143] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 01:20:10,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560002447] [2021-11-07 01:20:10,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:20:10,321 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:20:10,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b677fca8-fdd2-4523-a672-2852e12f73c4/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:20:10,325 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b677fca8-fdd2-4523-a672-2852e12f73c4/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:20:10,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b677fca8-fdd2-4523-a672-2852e12f73c4/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 01:20:10,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:20:10,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:20:10,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:20:10,796 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 01:20:10,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:20:11,081 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 01:20:11,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560002447] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:20:11,081 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-11-07 01:20:11,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 6 [2021-11-07 01:20:11,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646972339] [2021-11-07 01:20:11,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:20:11,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:20:11,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:20:11,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:20:11,082 INFO L87 Difference]: Start difference. First operand 3120 states and 4392 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 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) [2021-11-07 01:20:11,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:20:11,718 INFO L93 Difference]: Finished difference Result 3948 states and 5551 transitions. [2021-11-07 01:20:11,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:20:11,719 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 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 92 [2021-11-07 01:20:11,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:20:11,726 INFO L225 Difference]: With dead ends: 3948 [2021-11-07 01:20:11,727 INFO L226 Difference]: Without dead ends: 3944 [2021-11-07 01:20:11,729 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 181 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:20:11,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3944 states. [2021-11-07 01:20:12,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3944 to 3855. [2021-11-07 01:20:12,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3855 states, 3850 states have (on average 1.4153246753246753) internal successors, (5449), 3854 states have internal predecessors, (5449), 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) [2021-11-07 01:20:12,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3855 states to 3855 states and 5449 transitions. [2021-11-07 01:20:12,298 INFO L78 Accepts]: Start accepts. Automaton has 3855 states and 5449 transitions. Word has length 92 [2021-11-07 01:20:12,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:20:12,299 INFO L470 AbstractCegarLoop]: Abstraction has 3855 states and 5449 transitions. [2021-11-07 01:20:12,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 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) [2021-11-07 01:20:12,299 INFO L276 IsEmpty]: Start isEmpty. Operand 3855 states and 5449 transitions. [2021-11-07 01:20:12,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-07 01:20:12,303 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:20:12,305 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:20:12,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b677fca8-fdd2-4523-a672-2852e12f73c4/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:20:12,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b677fca8-fdd2-4523-a672-2852e12f73c4/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:20:12,520 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:20:12,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:20:12,521 INFO L85 PathProgramCache]: Analyzing trace with hash 2056298901, now seen corresponding path program 1 times [2021-11-07 01:20:12,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:20:12,521 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954142673] [2021-11-07 01:20:12,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:20:12,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:20:12,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:20:12,624 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:20:12,624 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:20:12,625 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954142673] [2021-11-07 01:20:12,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954142673] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 01:20:12,625 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872679716] [2021-11-07 01:20:12,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:20:12,626 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:20:12,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b677fca8-fdd2-4523-a672-2852e12f73c4/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:20:12,627 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b677fca8-fdd2-4523-a672-2852e12f73c4/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:20:12,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b677fca8-fdd2-4523-a672-2852e12f73c4/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-07 01:20:12,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:20:12,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:20:12,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:20:13,267 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 01:20:13,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:20:13,620 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 01:20:13,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872679716] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:20:13,621 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-11-07 01:20:13,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 6 [2021-11-07 01:20:13,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628016284] [2021-11-07 01:20:13,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:20:13,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:20:13,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:20:13,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:20:13,624 INFO L87 Difference]: Start difference. First operand 3855 states and 5449 transitions. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 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) [2021-11-07 01:20:14,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:20:14,152 INFO L93 Difference]: Finished difference Result 7553 states and 10723 transitions. [2021-11-07 01:20:14,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:20:14,153 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 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 145 [2021-11-07 01:20:14,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:20:14,158 INFO L225 Difference]: With dead ends: 7553 [2021-11-07 01:20:14,158 INFO L226 Difference]: Without dead ends: 3855 [2021-11-07 01:20:14,165 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 287 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:20:14,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3855 states. [2021-11-07 01:20:14,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3855 to 3855. [2021-11-07 01:20:14,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3855 states, 3850 states have (on average 1.3841558441558441) internal successors, (5329), 3854 states have internal predecessors, (5329), 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) [2021-11-07 01:20:14,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3855 states to 3855 states and 5329 transitions. [2021-11-07 01:20:14,620 INFO L78 Accepts]: Start accepts. Automaton has 3855 states and 5329 transitions. Word has length 145 [2021-11-07 01:20:14,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:20:14,620 INFO L470 AbstractCegarLoop]: Abstraction has 3855 states and 5329 transitions. [2021-11-07 01:20:14,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 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) [2021-11-07 01:20:14,621 INFO L276 IsEmpty]: Start isEmpty. Operand 3855 states and 5329 transitions. [2021-11-07 01:20:14,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-07 01:20:14,625 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:20:14,625 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:20:14,667 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b677fca8-fdd2-4523-a672-2852e12f73c4/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-07 01:20:14,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b677fca8-fdd2-4523-a672-2852e12f73c4/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-07 01:20:14,841 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:20:14,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:20:14,841 INFO L85 PathProgramCache]: Analyzing trace with hash -23981576, now seen corresponding path program 1 times [2021-11-07 01:20:14,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:20:14,841 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482377790] [2021-11-07 01:20:14,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:20:14,842 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:20:14,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:20:14,920 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 01:20:14,920 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:20:14,920 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482377790] [2021-11-07 01:20:14,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482377790] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 01:20:14,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705416084] [2021-11-07 01:20:14,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:20:14,921 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:20:14,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b677fca8-fdd2-4523-a672-2852e12f73c4/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:20:14,925 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b677fca8-fdd2-4523-a672-2852e12f73c4/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:20:14,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b677fca8-fdd2-4523-a672-2852e12f73c4/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-07 01:20:15,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:20:15,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:20:15,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:20:15,657 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:20:15,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:20:15,984 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:20:15,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705416084] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:20:15,985 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-11-07 01:20:15,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5] total 6 [2021-11-07 01:20:15,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414090829] [2021-11-07 01:20:15,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:20:15,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:20:15,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:20:15,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:20:15,987 INFO L87 Difference]: Start difference. First operand 3855 states and 5329 transitions. Second operand has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 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) [2021-11-07 01:20:16,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:20:16,495 INFO L93 Difference]: Finished difference Result 7537 states and 10467 transitions. [2021-11-07 01:20:16,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:20:16,496 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 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 148 [2021-11-07 01:20:16,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:20:16,501 INFO L225 Difference]: With dead ends: 7537 [2021-11-07 01:20:16,501 INFO L226 Difference]: Without dead ends: 3839 [2021-11-07 01:20:16,507 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 295 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:20:16,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3839 states. [2021-11-07 01:20:16,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3839 to 3839. [2021-11-07 01:20:16,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3839 states, 3834 states have (on average 1.3544600938967135) internal successors, (5193), 3838 states have internal predecessors, (5193), 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) [2021-11-07 01:20:16,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3839 states to 3839 states and 5193 transitions. [2021-11-07 01:20:16,883 INFO L78 Accepts]: Start accepts. Automaton has 3839 states and 5193 transitions. Word has length 148 [2021-11-07 01:20:16,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:20:16,884 INFO L470 AbstractCegarLoop]: Abstraction has 3839 states and 5193 transitions. [2021-11-07 01:20:16,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 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) [2021-11-07 01:20:16,885 INFO L276 IsEmpty]: Start isEmpty. Operand 3839 states and 5193 transitions. [2021-11-07 01:20:16,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-07 01:20:16,889 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:20:16,889 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:20:16,933 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b677fca8-fdd2-4523-a672-2852e12f73c4/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:20:17,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b677fca8-fdd2-4523-a672-2852e12f73c4/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-07 01:20:17,105 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:20:17,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:20:17,105 INFO L85 PathProgramCache]: Analyzing trace with hash -588839689, now seen corresponding path program 1 times [2021-11-07 01:20:17,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:20:17,105 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678107462] [2021-11-07 01:20:17,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:20:17,106 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:20:17,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:20:17,168 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 01:20:17,169 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:20:17,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678107462] [2021-11-07 01:20:17,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678107462] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 01:20:17,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135404683] [2021-11-07 01:20:17,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:20:17,170 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:20:17,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b677fca8-fdd2-4523-a672-2852e12f73c4/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:20:17,171 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b677fca8-fdd2-4523-a672-2852e12f73c4/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:20:17,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b677fca8-fdd2-4523-a672-2852e12f73c4/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-07 01:20:17,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:20:17,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:20:17,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:20:17,944 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-07 01:20:17,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:20:18,255 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-07 01:20:18,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135404683] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:20:18,256 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-11-07 01:20:18,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5] total 7 [2021-11-07 01:20:18,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431821376] [2021-11-07 01:20:18,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:20:18,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:20:18,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:20:18,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:20:18,258 INFO L87 Difference]: Start difference. First operand 3839 states and 5193 transitions. Second operand has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 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) [2021-11-07 01:20:19,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:20:19,227 INFO L93 Difference]: Finished difference Result 9772 states and 13488 transitions. [2021-11-07 01:20:19,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:20:19,229 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 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 149 [2021-11-07 01:20:19,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:20:19,237 INFO L225 Difference]: With dead ends: 9772 [2021-11-07 01:20:19,237 INFO L226 Difference]: Without dead ends: 6090 [2021-11-07 01:20:19,242 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 297 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:20:19,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6090 states. [2021-11-07 01:20:19,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6090 to 5334. [2021-11-07 01:20:19,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5334 states, 5329 states have (on average 1.3146931882154251) internal successors, (7006), 5333 states have internal predecessors, (7006), 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) [2021-11-07 01:20:19,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5334 states to 5334 states and 7006 transitions. [2021-11-07 01:20:19,633 INFO L78 Accepts]: Start accepts. Automaton has 5334 states and 7006 transitions. Word has length 149 [2021-11-07 01:20:19,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:20:19,633 INFO L470 AbstractCegarLoop]: Abstraction has 5334 states and 7006 transitions. [2021-11-07 01:20:19,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 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) [2021-11-07 01:20:19,634 INFO L276 IsEmpty]: Start isEmpty. Operand 5334 states and 7006 transitions. [2021-11-07 01:20:19,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-07 01:20:19,635 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:20:19,636 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:20:19,658 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b677fca8-fdd2-4523-a672-2852e12f73c4/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-07 01:20:19,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b677fca8-fdd2-4523-a672-2852e12f73c4/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:20:19,836 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 01:20:19,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:20:19,837 INFO L85 PathProgramCache]: Analyzing trace with hash -997414085, now seen corresponding path program 1 times [2021-11-07 01:20:19,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:20:19,837 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701538410] [2021-11-07 01:20:19,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:20:19,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:20:19,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:20:20,053 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 5 proven. 41 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 01:20:20,054 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:20:20,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701538410] [2021-11-07 01:20:20,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701538410] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 01:20:20,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901996542] [2021-11-07 01:20:20,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:20:20,055 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:20:20,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b677fca8-fdd2-4523-a672-2852e12f73c4/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:20:20,057 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b677fca8-fdd2-4523-a672-2852e12f73c4/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:20:20,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b677fca8-fdd2-4523-a672-2852e12f73c4/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-07 01:20:20,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:20:20,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-07 01:20:20,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:20:21,123 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 5 proven. 41 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 01:20:21,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:20:21,828 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 5 proven. 41 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 01:20:21,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901996542] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:20:21,828 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [349307758] [2021-11-07 01:20:21,872 INFO L159 IcfgInterpreter]: Started Sifa with 105 locations of interest [2021-11-07 01:20:21,872 INFO L166 IcfgInterpreter]: Building call graph [2021-11-07 01:20:21,878 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-07 01:20:21,884 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-07 01:20:21,884 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs