./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label04.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3edb90-b21d-471e-b315-9eed3e7fa7c6/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3edb90-b21d-471e-b315-9eed3e7fa7c6/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3edb90-b21d-471e-b315-9eed3e7fa7c6/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3edb90-b21d-471e-b315-9eed3e7fa7c6/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label04.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3edb90-b21d-471e-b315-9eed3e7fa7c6/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3edb90-b21d-471e-b315-9eed3e7fa7c6/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e08e043468e5282f02e354e2c270afb93bc3c7e2c832eb66aa2f729b9359c6aa --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 07:38:52,549 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 07:38:52,551 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 07:38:52,579 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 07:38:52,579 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 07:38:52,580 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 07:38:52,581 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 07:38:52,583 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 07:38:52,584 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 07:38:52,585 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 07:38:52,586 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 07:38:52,594 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 07:38:52,595 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 07:38:52,596 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 07:38:52,597 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 07:38:52,598 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 07:38:52,599 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 07:38:52,600 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 07:38:52,601 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 07:38:52,603 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 07:38:52,604 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 07:38:52,605 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 07:38:52,606 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 07:38:52,607 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 07:38:52,617 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 07:38:52,617 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 07:38:52,617 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 07:38:52,618 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 07:38:52,619 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 07:38:52,620 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 07:38:52,620 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 07:38:52,620 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 07:38:52,621 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 07:38:52,622 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 07:38:52,623 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 07:38:52,623 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 07:38:52,623 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 07:38:52,624 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 07:38:52,624 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 07:38:52,624 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 07:38:52,625 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 07:38:52,625 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3edb90-b21d-471e-b315-9eed3e7fa7c6/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 07:38:52,646 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 07:38:52,646 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 07:38:52,647 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 07:38:52,647 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 07:38:52,647 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 07:38:52,647 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 07:38:52,648 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 07:38:52,648 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 07:38:52,648 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 07:38:52,648 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 07:38:52,648 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 07:38:52,648 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 07:38:52,649 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 07:38:52,649 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 07:38:52,649 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 07:38:52,649 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 07:38:52,649 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 07:38:52,649 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 07:38:52,650 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 07:38:52,650 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 07:38:52,650 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 07:38:52,650 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 07:38:52,651 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 07:38:52,651 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 07:38:52,651 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 07:38:52,651 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 07:38:52,651 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 07:38:52,651 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 07:38:52,652 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 07:38:52,652 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 07:38:52,652 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 07:38:52,652 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 07:38:52,652 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 07:38:52,652 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 07:38:52,653 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 07:38:52,653 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 07:38:52,653 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 07:38:52,653 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 07:38:52,653 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 07:38:52,653 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 07:38:52,653 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 07:38:52,654 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3edb90-b21d-471e-b315-9eed3e7fa7c6/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3edb90-b21d-471e-b315-9eed3e7fa7c6/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e08e043468e5282f02e354e2c270afb93bc3c7e2c832eb66aa2f729b9359c6aa [2022-12-14 07:38:52,824 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 07:38:52,844 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 07:38:52,846 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 07:38:52,847 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 07:38:52,847 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 07:38:52,848 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3edb90-b21d-471e-b315-9eed3e7fa7c6/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/combinations/pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label04.c [2022-12-14 07:38:55,445 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 07:38:55,842 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 07:38:55,842 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3edb90-b21d-471e-b315-9eed3e7fa7c6/sv-benchmarks/c/combinations/pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label04.c [2022-12-14 07:38:55,859 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3edb90-b21d-471e-b315-9eed3e7fa7c6/bin/utaipan-gh47qXpMRh/data/add26ac92/ec0de0607cc64ba58587a335a8d95a70/FLAGc27439d91 [2022-12-14 07:38:55,869 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3edb90-b21d-471e-b315-9eed3e7fa7c6/bin/utaipan-gh47qXpMRh/data/add26ac92/ec0de0607cc64ba58587a335a8d95a70 [2022-12-14 07:38:55,871 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 07:38:55,872 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 07:38:55,873 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 07:38:55,873 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 07:38:55,876 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 07:38:55,876 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:38:55" (1/1) ... [2022-12-14 07:38:55,877 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b2c28b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:38:55, skipping insertion in model container [2022-12-14 07:38:55,877 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:38:55" (1/1) ... [2022-12-14 07:38:55,882 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 07:38:55,962 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 07:38:56,189 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3edb90-b21d-471e-b315-9eed3e7fa7c6/sv-benchmarks/c/combinations/pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label04.c[11640,11653] [2022-12-14 07:38:56,232 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3edb90-b21d-471e-b315-9eed3e7fa7c6/sv-benchmarks/c/combinations/pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label04.c[18701,18714] [2022-12-14 07:38:56,796 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 07:38:56,806 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 07:38:56,826 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3edb90-b21d-471e-b315-9eed3e7fa7c6/sv-benchmarks/c/combinations/pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label04.c[11640,11653] [2022-12-14 07:38:56,833 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3edb90-b21d-471e-b315-9eed3e7fa7c6/sv-benchmarks/c/combinations/pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label04.c[18701,18714] [2022-12-14 07:38:57,195 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 07:38:57,212 INFO L208 MainTranslator]: Completed translation [2022-12-14 07:38:57,212 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:38:57 WrapperNode [2022-12-14 07:38:57,212 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 07:38:57,213 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 07:38:57,213 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 07:38:57,213 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 07:38:57,219 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:38:57" (1/1) ... [2022-12-14 07:38:57,266 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:38:57" (1/1) ... [2022-12-14 07:38:57,498 INFO L138 Inliner]: procedures = 36, calls = 22, calls flagged for inlining = 17, calls inlined = 17, statements flattened = 5070 [2022-12-14 07:38:57,498 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 07:38:57,499 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 07:38:57,499 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 07:38:57,499 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 07:38:57,506 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:38:57" (1/1) ... [2022-12-14 07:38:57,507 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:38:57" (1/1) ... [2022-12-14 07:38:57,541 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:38:57" (1/1) ... [2022-12-14 07:38:57,541 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:38:57" (1/1) ... [2022-12-14 07:38:57,659 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:38:57" (1/1) ... [2022-12-14 07:38:57,673 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:38:57" (1/1) ... [2022-12-14 07:38:57,700 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:38:57" (1/1) ... [2022-12-14 07:38:57,708 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:38:57" (1/1) ... [2022-12-14 07:38:57,777 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 07:38:57,778 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 07:38:57,778 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 07:38:57,778 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 07:38:57,779 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:38:57" (1/1) ... [2022-12-14 07:38:57,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 07:38:57,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3edb90-b21d-471e-b315-9eed3e7fa7c6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:38:57,807 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3edb90-b21d-471e-b315-9eed3e7fa7c6/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 07:38:57,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc3edb90-b21d-471e-b315-9eed3e7fa7c6/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 07:38:57,840 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 07:38:57,840 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 07:38:57,841 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 07:38:57,841 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 07:38:57,944 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 07:38:57,946 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 07:39:01,363 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 07:40:46,124 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 07:40:46,124 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-14 07:40:46,127 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:40:46 BoogieIcfgContainer [2022-12-14 07:40:46,127 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 07:40:46,129 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 07:40:46,129 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 07:40:46,132 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 07:40:46,132 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 07:38:55" (1/3) ... [2022-12-14 07:40:46,133 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e2e6bcc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:40:46, skipping insertion in model container [2022-12-14 07:40:46,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:38:57" (2/3) ... [2022-12-14 07:40:46,134 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e2e6bcc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:40:46, skipping insertion in model container [2022-12-14 07:40:46,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:40:46" (3/3) ... [2022-12-14 07:40:46,135 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label04.c [2022-12-14 07:40:46,156 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 07:40:46,156 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-12-14 07:40:46,200 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 07:40:46,208 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@360d6cff, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 07:40:46,208 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-14 07:40:46,214 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:40:46,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 07:40:46,222 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:40:46,222 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 07:40:46,223 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:40:46,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:40:46,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1706183778, now seen corresponding path program 1 times [2022-12-14 07:40:46,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:40:46,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077898765] [2022-12-14 07:40:46,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:40:46,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:40:46,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:40:46,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:40:46,624 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:40:46,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077898765] [2022-12-14 07:40:46,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077898765] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:40:46,625 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:40:46,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 07:40:46,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255537669] [2022-12-14 07:40:46,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:40:46,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:40:46,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:40:46,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:40:46,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:40:46,666 INFO L87 Difference]: Start difference. First operand has 21 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 20 states have internal predecessors, (29), 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 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:40:47,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:40:47,410 INFO L93 Difference]: Finished difference Result 47 states and 64 transitions. [2022-12-14 07:40:47,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:40:47,413 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 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 6 [2022-12-14 07:40:47,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:40:47,420 INFO L225 Difference]: With dead ends: 47 [2022-12-14 07:40:47,420 INFO L226 Difference]: Without dead ends: 22 [2022-12-14 07:40:47,422 INFO L412 NwaCegarLoop]: 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 [2022-12-14 07:40:47,425 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 19 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 07:40:47,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 20 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 07:40:47,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-12-14 07:40:47,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2022-12-14 07:40:47,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:40:47,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2022-12-14 07:40:47,455 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 6 [2022-12-14 07:40:47,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:40:47,455 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2022-12-14 07:40:47,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:40:47,455 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2022-12-14 07:40:47,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 07:40:47,456 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:40:47,456 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:40:47,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 07:40:47,457 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:40:47,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:40:47,457 INFO L85 PathProgramCache]: Analyzing trace with hash -958415391, now seen corresponding path program 1 times [2022-12-14 07:40:47,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:40:47,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016991467] [2022-12-14 07:40:47,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:40:47,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:40:47,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:40:48,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:40:48,856 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:40:48,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016991467] [2022-12-14 07:40:48,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016991467] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:40:48,857 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:40:48,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 07:40:48,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890170213] [2022-12-14 07:40:48,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:40:48,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 07:40:48,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:40:48,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 07:40:48,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:40:48,863 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:40:49,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:40:49,552 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2022-12-14 07:40:49,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 07:40:49,552 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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 7 [2022-12-14 07:40:49,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:40:49,553 INFO L225 Difference]: With dead ends: 42 [2022-12-14 07:40:49,553 INFO L226 Difference]: Without dead ends: 32 [2022-12-14 07:40:49,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:40:49,556 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 18 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 07:40:49,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 24 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 07:40:49,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-12-14 07:40:49,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 23. [2022-12-14 07:40:49,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:40:49,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-12-14 07:40:49,564 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 7 [2022-12-14 07:40:49,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:40:49,565 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-12-14 07:40:49,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:40:49,565 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-12-14 07:40:49,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 07:40:49,565 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:40:49,565 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:40:49,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 07:40:49,566 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:40:49,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:40:49,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1899790487, now seen corresponding path program 1 times [2022-12-14 07:40:49,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:40:49,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268194604] [2022-12-14 07:40:49,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:40:49,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:40:49,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:40:49,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:40:49,977 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:40:49,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268194604] [2022-12-14 07:40:49,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268194604] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:40:49,978 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:40:49,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 07:40:49,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763290684] [2022-12-14 07:40:49,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:40:49,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 07:40:49,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:40:49,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 07:40:49,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:40:49,981 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:40:50,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:40:50,591 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2022-12-14 07:40:50,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 07:40:50,592 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 9 [2022-12-14 07:40:50,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:40:50,592 INFO L225 Difference]: With dead ends: 42 [2022-12-14 07:40:50,593 INFO L226 Difference]: Without dead ends: 32 [2022-12-14 07:40:50,593 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:40:50,594 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 16 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 07:40:50,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 30 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 07:40:50,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-12-14 07:40:50,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 24. [2022-12-14 07:40:50,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 23 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:40:50,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2022-12-14 07:40:50,598 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 9 [2022-12-14 07:40:50,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:40:50,598 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2022-12-14 07:40:50,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:40:50,599 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2022-12-14 07:40:50,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 07:40:50,599 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:40:50,599 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:40:50,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 07:40:50,600 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:40:50,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:40:50,600 INFO L85 PathProgramCache]: Analyzing trace with hash -2021814423, now seen corresponding path program 1 times [2022-12-14 07:40:50,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:40:50,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109583518] [2022-12-14 07:40:50,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:40:50,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:40:50,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:40:51,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:40:51,359 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:40:51,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109583518] [2022-12-14 07:40:51,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109583518] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:40:51,360 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:40:51,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 07:40:51,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423069127] [2022-12-14 07:40:51,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:40:51,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 07:40:51,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:40:51,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 07:40:51,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:40:51,362 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:40:51,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:40:51,928 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2022-12-14 07:40:51,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 07:40:51,928 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 9 [2022-12-14 07:40:51,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:40:51,929 INFO L225 Difference]: With dead ends: 42 [2022-12-14 07:40:51,930 INFO L226 Difference]: Without dead ends: 32 [2022-12-14 07:40:51,930 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:40:51,931 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 14 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 07:40:51,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 25 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 07:40:51,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-12-14 07:40:51,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 25. [2022-12-14 07:40:51,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:40:51,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2022-12-14 07:40:51,937 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 9 [2022-12-14 07:40:51,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:40:51,937 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2022-12-14 07:40:51,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:40:51,938 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2022-12-14 07:40:51,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 07:40:51,938 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:40:51,938 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:40:51,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 07:40:51,938 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:40:51,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:40:51,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1744480146, now seen corresponding path program 1 times [2022-12-14 07:40:51,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:40:51,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055266919] [2022-12-14 07:40:51,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:40:51,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:40:51,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:40:52,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:40:52,771 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:40:52,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055266919] [2022-12-14 07:40:52,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055266919] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:40:52,773 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:40:52,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 07:40:52,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078616090] [2022-12-14 07:40:52,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:40:52,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 07:40:52,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:40:52,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 07:40:52,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 07:40:52,775 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:40:53,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:40:53,370 INFO L93 Difference]: Finished difference Result 37 states and 44 transitions. [2022-12-14 07:40:53,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 07:40:53,371 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 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 10 [2022-12-14 07:40:53,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:40:53,372 INFO L225 Difference]: With dead ends: 37 [2022-12-14 07:40:53,372 INFO L226 Difference]: Without dead ends: 35 [2022-12-14 07:40:53,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-12-14 07:40:53,373 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 24 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 07:40:53,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 60 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 07:40:53,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-12-14 07:40:53,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2022-12-14 07:40:53,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 27 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:40:53,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2022-12-14 07:40:53,381 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 10 [2022-12-14 07:40:53,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:40:53,381 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2022-12-14 07:40:53,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:40:53,382 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2022-12-14 07:40:53,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 07:40:53,382 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:40:53,382 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2022-12-14 07:40:53,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 07:40:53,383 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:40:53,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:40:53,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1764929392, now seen corresponding path program 1 times [2022-12-14 07:40:53,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:40:53,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678207751] [2022-12-14 07:40:53,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:40:53,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:40:54,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat