./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_floodmax.5.3.ufo.BOUNDED-10.pals.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_cefb3af3-99bc-4f0e-a675-6c84840465b5/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cefb3af3-99bc-4f0e-a675-6c84840465b5/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_cefb3af3-99bc-4f0e-a675-6c84840465b5/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cefb3af3-99bc-4f0e-a675-6c84840465b5/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_floodmax.5.3.ufo.BOUNDED-10.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cefb3af3-99bc-4f0e-a675-6c84840465b5/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_cefb3af3-99bc-4f0e-a675-6c84840465b5/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 f1bcb2f3f5be6f9c47f1432334b844bf6563333b140bd48b23d7fc79eb421410 --- 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 04:45:12,553 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 04:45:12,555 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 04:45:12,568 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 04:45:12,568 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 04:45:12,569 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 04:45:12,570 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 04:45:12,571 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 04:45:12,572 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 04:45:12,573 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 04:45:12,574 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 04:45:12,574 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 04:45:12,575 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 04:45:12,575 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 04:45:12,576 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 04:45:12,577 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 04:45:12,578 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 04:45:12,578 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 04:45:12,579 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 04:45:12,581 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 04:45:12,582 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 04:45:12,583 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 04:45:12,584 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 04:45:12,584 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 04:45:12,587 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 04:45:12,587 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 04:45:12,587 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 04:45:12,588 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 04:45:12,588 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 04:45:12,589 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 04:45:12,589 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 04:45:12,590 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 04:45:12,596 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 04:45:12,597 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 04:45:12,598 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 04:45:12,598 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 04:45:12,598 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 04:45:12,598 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 04:45:12,599 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 04:45:12,599 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 04:45:12,600 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 04:45:12,600 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cefb3af3-99bc-4f0e-a675-6c84840465b5/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 04:45:12,621 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 04:45:12,621 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 04:45:12,621 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 04:45:12,621 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 04:45:12,622 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 04:45:12,622 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 04:45:12,622 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 04:45:12,622 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 04:45:12,622 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 04:45:12,622 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 04:45:12,623 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 04:45:12,623 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 04:45:12,623 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 04:45:12,623 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 04:45:12,623 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 04:45:12,623 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 04:45:12,623 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 04:45:12,623 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 04:45:12,624 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 04:45:12,624 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 04:45:12,624 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 04:45:12,624 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 04:45:12,624 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 04:45:12,624 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 04:45:12,635 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 04:45:12,635 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 04:45:12,636 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 04:45:12,636 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 04:45:12,636 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 04:45:12,636 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 04:45:12,636 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 04:45:12,636 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 04:45:12,637 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 04:45:12,637 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 04:45:12,637 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 04:45:12,637 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 04:45:12,637 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 04:45:12,637 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 04:45:12,637 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 04:45:12,638 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 04:45:12,638 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 04:45:12,638 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_cefb3af3-99bc-4f0e-a675-6c84840465b5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cefb3af3-99bc-4f0e-a675-6c84840465b5/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f1bcb2f3f5be6f9c47f1432334b844bf6563333b140bd48b23d7fc79eb421410 [2022-12-14 04:45:12,835 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 04:45:12,855 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 04:45:12,858 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 04:45:12,859 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 04:45:12,859 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 04:45:12,860 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cefb3af3-99bc-4f0e-a675-6c84840465b5/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/seq-mthreaded/pals_floodmax.5.3.ufo.BOUNDED-10.pals.c [2022-12-14 04:45:15,418 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 04:45:15,589 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 04:45:15,589 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cefb3af3-99bc-4f0e-a675-6c84840465b5/sv-benchmarks/c/seq-mthreaded/pals_floodmax.5.3.ufo.BOUNDED-10.pals.c [2022-12-14 04:45:15,602 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cefb3af3-99bc-4f0e-a675-6c84840465b5/bin/utaipan-gh47qXpMRh/data/f724811a3/f136a213fef94ec3968c46d92d89f87e/FLAG97d93be46 [2022-12-14 04:45:15,613 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cefb3af3-99bc-4f0e-a675-6c84840465b5/bin/utaipan-gh47qXpMRh/data/f724811a3/f136a213fef94ec3968c46d92d89f87e [2022-12-14 04:45:15,615 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 04:45:15,617 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 04:45:15,618 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 04:45:15,618 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 04:45:15,621 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 04:45:15,622 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:45:15" (1/1) ... [2022-12-14 04:45:15,622 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5fd7b8d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:45:15, skipping insertion in model container [2022-12-14 04:45:15,623 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:45:15" (1/1) ... [2022-12-14 04:45:15,628 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 04:45:15,669 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 04:45:15,919 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_cefb3af3-99bc-4f0e-a675-6c84840465b5/sv-benchmarks/c/seq-mthreaded/pals_floodmax.5.3.ufo.BOUNDED-10.pals.c[60917,60930] [2022-12-14 04:45:15,922 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 04:45:15,931 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 04:45:16,020 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_cefb3af3-99bc-4f0e-a675-6c84840465b5/sv-benchmarks/c/seq-mthreaded/pals_floodmax.5.3.ufo.BOUNDED-10.pals.c[60917,60930] [2022-12-14 04:45:16,020 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 04:45:16,033 INFO L208 MainTranslator]: Completed translation [2022-12-14 04:45:16,033 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:45:16 WrapperNode [2022-12-14 04:45:16,033 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 04:45:16,034 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 04:45:16,034 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 04:45:16,034 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 04:45:16,040 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:45:16" (1/1) ... [2022-12-14 04:45:16,056 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:45:16" (1/1) ... [2022-12-14 04:45:16,102 INFO L138 Inliner]: procedures = 24, calls = 16, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 1971 [2022-12-14 04:45:16,102 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 04:45:16,103 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 04:45:16,103 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 04:45:16,103 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 04:45:16,110 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:45:16" (1/1) ... [2022-12-14 04:45:16,110 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:45:16" (1/1) ... [2022-12-14 04:45:16,114 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:45:16" (1/1) ... [2022-12-14 04:45:16,115 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:45:16" (1/1) ... [2022-12-14 04:45:16,131 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:45:16" (1/1) ... [2022-12-14 04:45:16,144 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:45:16" (1/1) ... [2022-12-14 04:45:16,149 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:45:16" (1/1) ... [2022-12-14 04:45:16,153 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:45:16" (1/1) ... [2022-12-14 04:45:16,162 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 04:45:16,163 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 04:45:16,163 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 04:45:16,163 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 04:45:16,164 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:45:16" (1/1) ... [2022-12-14 04:45:16,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 04:45:16,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cefb3af3-99bc-4f0e-a675-6c84840465b5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:45:16,189 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cefb3af3-99bc-4f0e-a675-6c84840465b5/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 04:45:16,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cefb3af3-99bc-4f0e-a675-6c84840465b5/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 04:45:16,224 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 04:45:16,225 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 04:45:16,225 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 04:45:16,225 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 04:45:16,358 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 04:45:16,360 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 04:45:17,531 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 04:45:18,628 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 04:45:18,628 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 04:45:18,632 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:45:18 BoogieIcfgContainer [2022-12-14 04:45:18,632 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 04:45:18,634 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 04:45:18,635 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 04:45:18,638 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 04:45:18,638 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 04:45:15" (1/3) ... [2022-12-14 04:45:18,638 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@108f6c6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:45:18, skipping insertion in model container [2022-12-14 04:45:18,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:45:16" (2/3) ... [2022-12-14 04:45:18,639 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@108f6c6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:45:18, skipping insertion in model container [2022-12-14 04:45:18,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:45:18" (3/3) ... [2022-12-14 04:45:18,640 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.3.ufo.BOUNDED-10.pals.c [2022-12-14 04:45:18,657 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 04:45:18,657 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 04:45:18,706 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 04:45:18,711 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;@5122c441, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 04:45:18,711 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 04:45:18,716 INFO L276 IsEmpty]: Start isEmpty. Operand has 441 states, 439 states have (on average 1.7175398633257404) internal successors, (754), 440 states have internal predecessors, (754), 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 04:45:18,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-12-14 04:45:18,727 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:45:18,728 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:45:18,728 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:45:18,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:45:18,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1529125570, now seen corresponding path program 1 times [2022-12-14 04:45:18,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:45:18,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799946640] [2022-12-14 04:45:18,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:45:18,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:45:19,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:45:23,012 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 04:45:23,013 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:45:23,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799946640] [2022-12-14 04:45:23,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799946640] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:45:23,014 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 04:45:23,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 04:45:23,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818265449] [2022-12-14 04:45:23,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:45:23,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 04:45:23,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:45:23,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 04:45:23,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 04:45:23,045 INFO L87 Difference]: Start difference. First operand has 441 states, 439 states have (on average 1.7175398633257404) internal successors, (754), 440 states have internal predecessors, (754), 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 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 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 04:45:23,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:45:23,365 INFO L93 Difference]: Finished difference Result 483 states and 822 transitions. [2022-12-14 04:45:23,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 04:45:23,367 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 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 126 [2022-12-14 04:45:23,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:45:23,376 INFO L225 Difference]: With dead ends: 483 [2022-12-14 04:45:23,376 INFO L226 Difference]: Without dead ends: 460 [2022-12-14 04:45:23,379 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 04:45:23,381 INFO L413 NwaCegarLoop]: 673 mSDtfsCounter, 31 mSDsluCounter, 683 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 1356 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 04:45:23,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 1356 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 04:45:23,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2022-12-14 04:45:23,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 450. [2022-12-14 04:45:23,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 1.712694877505568) internal successors, (769), 449 states have internal predecessors, (769), 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 04:45:23,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 769 transitions. [2022-12-14 04:45:23,438 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 769 transitions. Word has length 126 [2022-12-14 04:45:23,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:45:23,438 INFO L495 AbstractCegarLoop]: Abstraction has 450 states and 769 transitions. [2022-12-14 04:45:23,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 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 04:45:23,439 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 769 transitions. [2022-12-14 04:45:23,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-12-14 04:45:23,441 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:45:23,441 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:45:23,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 04:45:23,442 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:45:23,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:45:23,442 INFO L85 PathProgramCache]: Analyzing trace with hash 84567325, now seen corresponding path program 1 times [2022-12-14 04:45:23,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:45:23,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304784049] [2022-12-14 04:45:23,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:45:23,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:45:23,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:45:25,941 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 04:45:25,942 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:45:25,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304784049] [2022-12-14 04:45:25,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304784049] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:45:25,942 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 04:45:25,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 04:45:25,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701048876] [2022-12-14 04:45:25,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:45:25,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 04:45:25,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:45:25,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 04:45:25,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 04:45:25,945 INFO L87 Difference]: Start difference. First operand 450 states and 769 transitions. Second operand has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 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 04:45:26,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:45:26,180 INFO L93 Difference]: Finished difference Result 483 states and 819 transitions. [2022-12-14 04:45:26,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 04:45:26,180 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 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 127 [2022-12-14 04:45:26,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:45:26,183 INFO L225 Difference]: With dead ends: 483 [2022-12-14 04:45:26,183 INFO L226 Difference]: Without dead ends: 462 [2022-12-14 04:45:26,184 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 04:45:26,185 INFO L413 NwaCegarLoop]: 680 mSDtfsCounter, 26 mSDsluCounter, 1354 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 2034 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 04:45:26,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 2034 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 04:45:26,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2022-12-14 04:45:26,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 450. [2022-12-14 04:45:26,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 1.710467706013363) internal successors, (768), 449 states have internal predecessors, (768), 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 04:45:26,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 768 transitions. [2022-12-14 04:45:26,209 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 768 transitions. Word has length 127 [2022-12-14 04:45:26,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:45:26,209 INFO L495 AbstractCegarLoop]: Abstraction has 450 states and 768 transitions. [2022-12-14 04:45:26,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 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 04:45:26,210 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 768 transitions. [2022-12-14 04:45:26,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-12-14 04:45:26,213 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:45:26,213 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:45:26,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 04:45:26,214 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:45:26,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:45:26,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1741613557, now seen corresponding path program 1 times [2022-12-14 04:45:26,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:45:26,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137816999] [2022-12-14 04:45:26,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:45:26,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:45:26,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:45:28,547 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 04:45:28,547 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:45:28,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137816999] [2022-12-14 04:45:28,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137816999] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:45:28,548 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 04:45:28,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 04:45:28,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095719580] [2022-12-14 04:45:28,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:45:28,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 04:45:28,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:45:28,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 04:45:28,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 04:45:28,550 INFO L87 Difference]: Start difference. First operand 450 states and 768 transitions. Second operand has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 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 04:45:28,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:45:28,738 INFO L93 Difference]: Finished difference Result 483 states and 818 transitions. [2022-12-14 04:45:28,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 04:45:28,738 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 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 128 [2022-12-14 04:45:28,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:45:28,739 INFO L225 Difference]: With dead ends: 483 [2022-12-14 04:45:28,740 INFO L226 Difference]: Without dead ends: 462 [2022-12-14 04:45:28,740 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 04:45:28,741 INFO L413 NwaCegarLoop]: 680 mSDtfsCounter, 24 mSDsluCounter, 694 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 1374 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 04:45:28,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 1374 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 04:45:28,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2022-12-14 04:45:28,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 450. [2022-12-14 04:45:28,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 1.7082405345211582) internal successors, (767), 449 states have internal predecessors, (767), 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 04:45:28,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 767 transitions. [2022-12-14 04:45:28,750 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 767 transitions. Word has length 128 [2022-12-14 04:45:28,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:45:28,751 INFO L495 AbstractCegarLoop]: Abstraction has 450 states and 767 transitions. [2022-12-14 04:45:28,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 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 04:45:28,751 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 767 transitions. [2022-12-14 04:45:28,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-12-14 04:45:28,752 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:45:28,752 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:45:28,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 04:45:28,753 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:45:28,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:45:28,753 INFO L85 PathProgramCache]: Analyzing trace with hash 1781772998, now seen corresponding path program 1 times [2022-12-14 04:45:28,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:45:28,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817972792] [2022-12-14 04:45:28,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:45:28,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:45:28,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:45:30,963 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 04:45:30,964 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:45:30,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817972792] [2022-12-14 04:45:30,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817972792] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:45:30,964 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 04:45:30,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 04:45:30,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706083190] [2022-12-14 04:45:30,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:45:30,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 04:45:30,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:45:30,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 04:45:30,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 04:45:30,966 INFO L87 Difference]: Start difference. First operand 450 states and 767 transitions. Second operand has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 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 04:45:31,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:45:31,165 INFO L93 Difference]: Finished difference Result 483 states and 817 transitions. [2022-12-14 04:45:31,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 04:45:31,166 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 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 129 [2022-12-14 04:45:31,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:45:31,168 INFO L225 Difference]: With dead ends: 483 [2022-12-14 04:45:31,168 INFO L226 Difference]: Without dead ends: 462 [2022-12-14 04:45:31,168 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 04:45:31,170 INFO L413 NwaCegarLoop]: 680 mSDtfsCounter, 22 mSDsluCounter, 1354 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 2034 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 04:45:31,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 2034 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 04:45:31,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2022-12-14 04:45:31,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 450. [2022-12-14 04:45:31,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 1.7060133630289531) internal successors, (766), 449 states have internal predecessors, (766), 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 04:45:31,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 766 transitions. [2022-12-14 04:45:31,180 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 766 transitions. Word has length 129 [2022-12-14 04:45:31,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:45:31,181 INFO L495 AbstractCegarLoop]: Abstraction has 450 states and 766 transitions. [2022-12-14 04:45:31,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 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 04:45:31,181 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 766 transitions. [2022-12-14 04:45:31,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-12-14 04:45:31,182 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:45:31,182 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:45:31,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 04:45:31,183 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:45:31,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:45:31,183 INFO L85 PathProgramCache]: Analyzing trace with hash -656941740, now seen corresponding path program 1 times [2022-12-14 04:45:31,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:45:31,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201727211] [2022-12-14 04:45:31,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:45:31,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:45:31,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:45:33,359 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 04:45:33,360 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:45:33,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201727211] [2022-12-14 04:45:33,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201727211] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:45:33,360 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 04:45:33,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 04:45:33,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437589821] [2022-12-14 04:45:33,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:45:33,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 04:45:33,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:45:33,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 04:45:33,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 04:45:33,362 INFO L87 Difference]: Start difference. First operand 450 states and 766 transitions. Second operand has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 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 04:45:33,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:45:33,513 INFO L93 Difference]: Finished difference Result 483 states and 816 transitions. [2022-12-14 04:45:33,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 04:45:33,513 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 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 130 [2022-12-14 04:45:33,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:45:33,514 INFO L225 Difference]: With dead ends: 483 [2022-12-14 04:45:33,514 INFO L226 Difference]: Without dead ends: 462 [2022-12-14 04:45:33,515 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 04:45:33,516 INFO L413 NwaCegarLoop]: 680 mSDtfsCounter, 20 mSDsluCounter, 692 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 1372 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 04:45:33,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 1372 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 04:45:33,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2022-12-14 04:45:33,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 450. [2022-12-14 04:45:33,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 1.7037861915367483) internal successors, (765), 449 states have internal predecessors, (765), 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 04:45:33,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 765 transitions. [2022-12-14 04:45:33,528 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 765 transitions. Word has length 130 [2022-12-14 04:45:33,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:45:33,528 INFO L495 AbstractCegarLoop]: Abstraction has 450 states and 765 transitions. [2022-12-14 04:45:33,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 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 04:45:33,529 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 765 transitions. [2022-12-14 04:45:33,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-12-14 04:45:33,531 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:45:33,531 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:45:33,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 04:45:33,531 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:45:33,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:45:33,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1057764463, now seen corresponding path program 1 times [2022-12-14 04:45:33,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:45:33,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644972595] [2022-12-14 04:45:33,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:45:33,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:45:33,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:45:35,756 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 04:45:35,756 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:45:35,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644972595] [2022-12-14 04:45:35,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644972595] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:45:35,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 04:45:35,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 04:45:35,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451863107] [2022-12-14 04:45:35,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:45:35,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 04:45:35,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:45:35,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 04:45:35,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 04:45:35,758 INFO L87 Difference]: Start difference. First operand 450 states and 765 transitions. Second operand has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 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 04:45:35,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:45:35,976 INFO L93 Difference]: Finished difference Result 483 states and 815 transitions. [2022-12-14 04:45:35,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 04:45:35,976 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 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 131 [2022-12-14 04:45:35,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:45:35,979 INFO L225 Difference]: With dead ends: 483 [2022-12-14 04:45:35,979 INFO L226 Difference]: Without dead ends: 462 [2022-12-14 04:45:35,980 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 04:45:35,981 INFO L413 NwaCegarLoop]: 680 mSDtfsCounter, 18 mSDsluCounter, 1354 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 2034 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 04:45:35,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 2034 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 04:45:35,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2022-12-14 04:45:35,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 450. [2022-12-14 04:45:35,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 1.7015590200445434) internal successors, (764), 449 states have internal predecessors, (764), 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 04:45:35,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 764 transitions. [2022-12-14 04:45:35,989 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 764 transitions. Word has length 131 [2022-12-14 04:45:35,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:45:35,989 INFO L495 AbstractCegarLoop]: Abstraction has 450 states and 764 transitions. [2022-12-14 04:45:35,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 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 04:45:35,990 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 764 transitions. [2022-12-14 04:45:35,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-12-14 04:45:35,991 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:45:35,991 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:45:35,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 04:45:35,991 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:45:35,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:45:35,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1421112887, now seen corresponding path program 1 times [2022-12-14 04:45:35,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:45:35,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588886674] [2022-12-14 04:45:35,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:45:35,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:45:36,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:45:39,128 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 04:45:39,128 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:45:39,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588886674] [2022-12-14 04:45:39,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588886674] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:45:39,128 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 04:45:39,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 04:45:39,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306590865] [2022-12-14 04:45:39,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:45:39,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 04:45:39,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:45:39,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 04:45:39,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 04:45:39,130 INFO L87 Difference]: Start difference. First operand 450 states and 764 transitions. Second operand has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 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 04:45:39,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:45:39,289 INFO L93 Difference]: Finished difference Result 481 states and 811 transitions. [2022-12-14 04:45:39,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 04:45:39,290 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 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 133 [2022-12-14 04:45:39,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:45:39,291 INFO L225 Difference]: With dead ends: 481 [2022-12-14 04:45:39,291 INFO L226 Difference]: Without dead ends: 460 [2022-12-14 04:45:39,292 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 04:45:39,292 INFO L413 NwaCegarLoop]: 679 mSDtfsCounter, 15 mSDsluCounter, 683 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 1362 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 04:45:39,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 1362 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 04:45:39,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2022-12-14 04:45:39,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 451. [2022-12-14 04:45:39,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 450 states have (on average 1.7) internal successors, (765), 450 states have internal predecessors, (765), 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 04:45:39,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 765 transitions. [2022-12-14 04:45:39,300 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 765 transitions. Word has length 133 [2022-12-14 04:45:39,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:45:39,300 INFO L495 AbstractCegarLoop]: Abstraction has 451 states and 765 transitions. [2022-12-14 04:45:39,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 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 04:45:39,300 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 765 transitions. [2022-12-14 04:45:39,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-12-14 04:45:39,301 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:45:39,301 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:45:39,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 04:45:39,302 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:45:39,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:45:39,302 INFO L85 PathProgramCache]: Analyzing trace with hash 1016752395, now seen corresponding path program 1 times [2022-12-14 04:45:39,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:45:39,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121646622] [2022-12-14 04:45:39,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:45:39,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:45:39,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:45:41,757 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 04:45:41,757 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:45:41,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121646622] [2022-12-14 04:45:41,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121646622] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:45:41,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 04:45:41,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 04:45:41,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738456063] [2022-12-14 04:45:41,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:45:41,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 04:45:41,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:45:41,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 04:45:41,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 04:45:41,759 INFO L87 Difference]: Start difference. First operand 451 states and 765 transitions. Second operand has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 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 04:45:41,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:45:41,898 INFO L93 Difference]: Finished difference Result 482 states and 812 transitions. [2022-12-14 04:45:41,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 04:45:41,898 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 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 134 [2022-12-14 04:45:41,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:45:41,901 INFO L225 Difference]: With dead ends: 482 [2022-12-14 04:45:41,901 INFO L226 Difference]: Without dead ends: 461 [2022-12-14 04:45:41,902 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 04:45:41,902 INFO L413 NwaCegarLoop]: 684 mSDtfsCounter, 12 mSDsluCounter, 694 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1378 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 04:45:41,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 1378 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 04:45:41,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2022-12-14 04:45:41,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 453. [2022-12-14 04:45:41,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 452 states have (on average 1.6946902654867257) internal successors, (766), 452 states have internal predecessors, (766), 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 04:45:41,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 766 transitions. [2022-12-14 04:45:41,910 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 766 transitions. Word has length 134 [2022-12-14 04:45:41,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:45:41,910 INFO L495 AbstractCegarLoop]: Abstraction has 453 states and 766 transitions. [2022-12-14 04:45:41,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 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 04:45:41,911 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 766 transitions. [2022-12-14 04:45:41,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-12-14 04:45:41,912 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:45:41,913 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:45:41,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 04:45:41,913 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:45:41,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:45:41,913 INFO L85 PathProgramCache]: Analyzing trace with hash -644410863, now seen corresponding path program 1 times [2022-12-14 04:45:41,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:45:41,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036593132] [2022-12-14 04:45:41,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:45:41,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:45:42,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:45:44,831 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 04:45:44,832 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:45:44,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036593132] [2022-12-14 04:45:44,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036593132] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:45:44,832 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 04:45:44,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 04:45:44,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519876738] [2022-12-14 04:45:44,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:45:44,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 04:45:44,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:45:44,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 04:45:44,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 04:45:44,834 INFO L87 Difference]: Start difference. First operand 453 states and 766 transitions. Second operand has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 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 04:45:45,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:45:45,065 INFO L93 Difference]: Finished difference Result 482 states and 809 transitions. [2022-12-14 04:45:45,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 04:45:45,065 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 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 136 [2022-12-14 04:45:45,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:45:45,067 INFO L225 Difference]: With dead ends: 482 [2022-12-14 04:45:45,067 INFO L226 Difference]: Without dead ends: 461 [2022-12-14 04:45:45,067 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 04:45:45,067 INFO L413 NwaCegarLoop]: 681 mSDtfsCounter, 7 mSDsluCounter, 1350 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 2031 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 04:45:45,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 2031 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 04:45:45,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2022-12-14 04:45:45,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 454. [2022-12-14 04:45:45,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 453 states have (on average 1.6931567328918322) internal successors, (767), 453 states have internal predecessors, (767), 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 04:45:45,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 767 transitions. [2022-12-14 04:45:45,075 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 767 transitions. Word has length 136 [2022-12-14 04:45:45,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:45:45,076 INFO L495 AbstractCegarLoop]: Abstraction has 454 states and 767 transitions. [2022-12-14 04:45:45,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 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 04:45:45,076 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 767 transitions. [2022-12-14 04:45:45,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-12-14 04:45:45,076 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:45:45,076 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:45:45,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 04:45:45,077 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:45:45,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:45:45,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1489388809, now seen corresponding path program 1 times [2022-12-14 04:45:45,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:45:45,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289914787] [2022-12-14 04:45:45,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:45:45,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:45:45,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:45:45,419 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 04:45:45,419 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:45:45,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289914787] [2022-12-14 04:45:45,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289914787] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:45:45,419 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 04:45:45,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 04:45:45,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759188239] [2022-12-14 04:45:45,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:45:45,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 04:45:45,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:45:45,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 04:45:45,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 04:45:45,421 INFO L87 Difference]: Start difference. First operand 454 states and 767 transitions. Second operand has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 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 04:45:45,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:45:45,667 INFO L93 Difference]: Finished difference Result 505 states and 847 transitions. [2022-12-14 04:45:45,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 04:45:45,668 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 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 137 [2022-12-14 04:45:45,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:45:45,671 INFO L225 Difference]: With dead ends: 505 [2022-12-14 04:45:45,671 INFO L226 Difference]: Without dead ends: 484 [2022-12-14 04:45:45,671 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-12-14 04:45:45,672 INFO L413 NwaCegarLoop]: 696 mSDtfsCounter, 47 mSDsluCounter, 2058 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 2754 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 04:45:45,672 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 2754 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 04:45:45,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2022-12-14 04:45:45,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 457. [2022-12-14 04:45:45,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 456 states have (on average 1.6864035087719298) internal successors, (769), 456 states have internal predecessors, (769), 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 04:45:45,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 769 transitions. [2022-12-14 04:45:45,682 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 769 transitions. Word has length 137 [2022-12-14 04:45:45,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:45:45,682 INFO L495 AbstractCegarLoop]: Abstraction has 457 states and 769 transitions. [2022-12-14 04:45:45,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 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 04:45:45,682 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 769 transitions. [2022-12-14 04:45:45,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-12-14 04:45:45,683 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:45:45,683 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:45:45,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 04:45:45,683 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:45:45,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:45:45,684 INFO L85 PathProgramCache]: Analyzing trace with hash -202319544, now seen corresponding path program 1 times [2022-12-14 04:45:45,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:45:45,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940226014] [2022-12-14 04:45:45,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:45:45,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:45:46,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:45:53,201 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 04:45:53,202 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:45:53,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940226014] [2022-12-14 04:45:53,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940226014] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:45:53,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37944233] [2022-12-14 04:45:53,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:45:53,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:45:53,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cefb3af3-99bc-4f0e-a675-6c84840465b5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:45:53,203 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cefb3af3-99bc-4f0e-a675-6c84840465b5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:45:53,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cefb3af3-99bc-4f0e-a675-6c84840465b5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 04:45:53,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:45:53,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 776 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 04:45:53,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:46:26,371 WARN L233 SmtUtils]: Spent 8.91s on a formula simplification. DAG size of input: 667 DAG size of output: 519 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 04:47:41,385 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 04:47:41,385 INFO L328 TraceCheckSpWp]: Computing backward predicates...