./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/openssl/s3_srvr.blast.07.i.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a 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_fe509752-14c1-410e-81a3-1f5373608fc7/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe509752-14c1-410e-81a3-1f5373608fc7/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe509752-14c1-410e-81a3-1f5373608fc7/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe509752-14c1-410e-81a3-1f5373608fc7/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.07.i.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe509752-14c1-410e-81a3-1f5373608fc7/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe509752-14c1-410e-81a3-1f5373608fc7/bin/utaipan-7li7fVZpFI --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 f0dfbb8857f62702e453e52a8d4dce71a2bbeaa268873f608805c08e77bb3dfc --- 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-5e519f3 [2022-11-03 03:38:45,571 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 03:38:45,573 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 03:38:45,599 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 03:38:45,599 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 03:38:45,600 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 03:38:45,602 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 03:38:45,604 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 03:38:45,606 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 03:38:45,607 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 03:38:45,608 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 03:38:45,610 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 03:38:45,610 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 03:38:45,611 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 03:38:45,613 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 03:38:45,614 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 03:38:45,615 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 03:38:45,616 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 03:38:45,618 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 03:38:45,620 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 03:38:45,621 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 03:38:45,623 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 03:38:45,624 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 03:38:45,625 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 03:38:45,628 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 03:38:45,629 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 03:38:45,629 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 03:38:45,630 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 03:38:45,631 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 03:38:45,632 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 03:38:45,632 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 03:38:45,633 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 03:38:45,634 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 03:38:45,635 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 03:38:45,636 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 03:38:45,636 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 03:38:45,637 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 03:38:45,638 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 03:38:45,638 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 03:38:45,639 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 03:38:45,640 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 03:38:45,644 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe509752-14c1-410e-81a3-1f5373608fc7/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 03:38:45,678 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 03:38:45,679 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 03:38:45,679 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 03:38:45,680 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 03:38:45,681 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 03:38:45,681 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 03:38:45,681 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 03:38:45,681 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 03:38:45,682 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 03:38:45,682 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 03:38:45,683 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 03:38:45,683 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 03:38:45,684 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 03:38:45,684 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 03:38:45,684 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 03:38:45,684 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 03:38:45,685 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 03:38:45,685 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 03:38:45,686 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 03:38:45,686 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 03:38:45,686 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 03:38:45,686 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 03:38:45,687 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 03:38:45,687 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 03:38:45,687 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 03:38:45,687 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 03:38:45,688 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 03:38:45,688 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 03:38:45,688 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 03:38:45,689 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 03:38:45,689 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 03:38:45,690 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 03:38:45,690 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:38:45,691 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 03:38:45,691 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 03:38:45,691 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 03:38:45,692 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 03:38:45,692 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 03:38:45,692 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 03:38:45,692 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 03:38:45,693 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 03:38:45,693 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_fe509752-14c1-410e-81a3-1f5373608fc7/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe509752-14c1-410e-81a3-1f5373608fc7/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f0dfbb8857f62702e453e52a8d4dce71a2bbeaa268873f608805c08e77bb3dfc [2022-11-03 03:38:46,013 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 03:38:46,035 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 03:38:46,038 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 03:38:46,051 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 03:38:46,052 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 03:38:46,054 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe509752-14c1-410e-81a3-1f5373608fc7/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/openssl/s3_srvr.blast.07.i.cil-1.c [2022-11-03 03:38:46,133 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe509752-14c1-410e-81a3-1f5373608fc7/bin/utaipan-7li7fVZpFI/data/81bdd77ba/5403af7e8ac543a291db680a9c4ab1c1/FLAGf52125f71 [2022-11-03 03:38:46,753 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 03:38:46,754 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe509752-14c1-410e-81a3-1f5373608fc7/sv-benchmarks/c/openssl/s3_srvr.blast.07.i.cil-1.c [2022-11-03 03:38:46,774 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe509752-14c1-410e-81a3-1f5373608fc7/bin/utaipan-7li7fVZpFI/data/81bdd77ba/5403af7e8ac543a291db680a9c4ab1c1/FLAGf52125f71 [2022-11-03 03:38:46,983 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe509752-14c1-410e-81a3-1f5373608fc7/bin/utaipan-7li7fVZpFI/data/81bdd77ba/5403af7e8ac543a291db680a9c4ab1c1 [2022-11-03 03:38:46,986 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 03:38:46,990 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 03:38:46,993 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 03:38:46,993 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 03:38:46,998 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 03:38:46,999 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:38:46" (1/1) ... [2022-11-03 03:38:47,001 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d9d465 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:38:46, skipping insertion in model container [2022-11-03 03:38:47,001 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:38:46" (1/1) ... [2022-11-03 03:38:47,011 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 03:38:47,087 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:38:47,574 WARN L230 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_fe509752-14c1-410e-81a3-1f5373608fc7/sv-benchmarks/c/openssl/s3_srvr.blast.07.i.cil-1.c[74369,74382] [2022-11-03 03:38:47,601 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:38:47,614 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 03:38:47,820 WARN L230 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_fe509752-14c1-410e-81a3-1f5373608fc7/sv-benchmarks/c/openssl/s3_srvr.blast.07.i.cil-1.c[74369,74382] [2022-11-03 03:38:47,823 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:38:47,852 INFO L208 MainTranslator]: Completed translation [2022-11-03 03:38:47,853 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:38:47 WrapperNode [2022-11-03 03:38:47,853 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 03:38:47,854 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 03:38:47,854 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 03:38:47,854 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 03:38:47,862 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:38:47" (1/1) ... [2022-11-03 03:38:47,904 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:38:47" (1/1) ... [2022-11-03 03:38:47,967 INFO L138 Inliner]: procedures = 31, calls = 223, calls flagged for inlining = 7, calls inlined = 3, statements flattened = 792 [2022-11-03 03:38:47,967 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 03:38:47,968 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 03:38:47,968 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 03:38:47,968 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 03:38:47,986 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:38:47" (1/1) ... [2022-11-03 03:38:47,986 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:38:47" (1/1) ... [2022-11-03 03:38:47,999 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:38:47" (1/1) ... [2022-11-03 03:38:47,999 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:38:47" (1/1) ... [2022-11-03 03:38:48,029 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:38:47" (1/1) ... [2022-11-03 03:38:48,036 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:38:47" (1/1) ... [2022-11-03 03:38:48,038 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:38:47" (1/1) ... [2022-11-03 03:38:48,041 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:38:47" (1/1) ... [2022-11-03 03:38:48,045 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 03:38:48,046 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 03:38:48,046 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 03:38:48,047 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 03:38:48,048 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:38:47" (1/1) ... [2022-11-03 03:38:48,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:38:48,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe509752-14c1-410e-81a3-1f5373608fc7/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:38:48,078 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe509752-14c1-410e-81a3-1f5373608fc7/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 03:38:48,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe509752-14c1-410e-81a3-1f5373608fc7/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 03:38:48,157 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 03:38:48,158 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-03 03:38:48,158 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 03:38:48,158 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 03:38:48,158 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-03 03:38:48,159 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 03:38:48,159 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 03:38:48,159 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 03:38:48,159 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 03:38:48,391 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 03:38:48,393 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 03:38:48,426 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-11-03 03:38:49,823 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2022-11-03 03:38:49,823 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2022-11-03 03:38:49,824 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 03:38:50,269 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 03:38:50,269 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 03:38:50,272 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:38:50 BoogieIcfgContainer [2022-11-03 03:38:50,272 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 03:38:50,276 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 03:38:50,276 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 03:38:50,280 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 03:38:50,280 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:38:46" (1/3) ... [2022-11-03 03:38:50,281 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14006cf5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:38:50, skipping insertion in model container [2022-11-03 03:38:50,281 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:38:47" (2/3) ... [2022-11-03 03:38:50,282 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14006cf5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:38:50, skipping insertion in model container [2022-11-03 03:38:50,282 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:38:50" (3/3) ... [2022-11-03 03:38:50,283 INFO L112 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.07.i.cil-1.c [2022-11-03 03:38:50,308 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 03:38:50,308 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 03:38:50,385 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 03:38:50,397 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;@563db0e5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 03:38:50,397 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 03:38:50,403 INFO L276 IsEmpty]: Start isEmpty. Operand has 109 states, 107 states have (on average 1.7570093457943925) internal successors, (188), 108 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:38:50,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-03 03:38:50,415 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:38:50,415 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] [2022-11-03 03:38:50,416 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:38:50,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:38:50,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1727946225, now seen corresponding path program 1 times [2022-11-03 03:38:50,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:38:50,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656618197] [2022-11-03 03:38:50,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:38:50,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:38:50,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:38:51,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:38:51,848 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:38:51,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656618197] [2022-11-03 03:38:51,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656618197] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:38:51,849 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:38:51,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:38:51,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999650896] [2022-11-03 03:38:51,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:38:51,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:38:51,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:38:51,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:38:51,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:38:51,899 INFO L87 Difference]: Start difference. First operand has 109 states, 107 states have (on average 1.7570093457943925) internal successors, (188), 108 states have internal predecessors, (188), 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 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:38:53,934 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:38:54,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:38:54,625 INFO L93 Difference]: Finished difference Result 241 states and 416 transitions. [2022-11-03 03:38:54,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:38:54,629 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-11-03 03:38:54,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:38:54,639 INFO L225 Difference]: With dead ends: 241 [2022-11-03 03:38:54,639 INFO L226 Difference]: Without dead ends: 128 [2022-11-03 03:38:54,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:38:54,646 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 20 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-03 03:38:54,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 393 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 160 Invalid, 1 Unknown, 0 Unchecked, 2.7s Time] [2022-11-03 03:38:54,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-11-03 03:38:54,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 116. [2022-11-03 03:38:54,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.5391304347826087) internal successors, (177), 115 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:38:54,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 177 transitions. [2022-11-03 03:38:54,690 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 177 transitions. Word has length 29 [2022-11-03 03:38:54,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:38:54,691 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 177 transitions. [2022-11-03 03:38:54,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:38:54,691 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 177 transitions. [2022-11-03 03:38:54,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-03 03:38:54,693 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:38:54,693 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:38:54,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 03:38:54,693 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:38:54,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:38:54,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1758311644, now seen corresponding path program 1 times [2022-11-03 03:38:54,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:38:54,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515022543] [2022-11-03 03:38:54,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:38:54,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:38:54,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:38:55,384 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:38:55,385 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:38:55,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515022543] [2022-11-03 03:38:55,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515022543] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:38:55,387 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:38:55,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:38:55,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517174374] [2022-11-03 03:38:55,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:38:55,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:38:55,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:38:55,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:38:55,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:38:55,392 INFO L87 Difference]: Start difference. First operand 116 states and 177 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:38:57,410 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:38:57,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:38:57,869 INFO L93 Difference]: Finished difference Result 232 states and 348 transitions. [2022-11-03 03:38:57,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:38:57,871 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-11-03 03:38:57,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:38:57,873 INFO L225 Difference]: With dead ends: 232 [2022-11-03 03:38:57,873 INFO L226 Difference]: Without dead ends: 128 [2022-11-03 03:38:57,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:38:57,875 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 19 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:38:57,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 325 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 148 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2022-11-03 03:38:57,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-11-03 03:38:57,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 116. [2022-11-03 03:38:57,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.5304347826086957) internal successors, (176), 115 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:38:57,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 176 transitions. [2022-11-03 03:38:57,897 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 176 transitions. Word has length 39 [2022-11-03 03:38:57,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:38:57,897 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 176 transitions. [2022-11-03 03:38:57,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:38:57,898 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 176 transitions. [2022-11-03 03:38:57,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-03 03:38:57,899 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:38:57,899 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] [2022-11-03 03:38:57,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 03:38:57,900 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:38:57,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:38:57,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1594262621, now seen corresponding path program 1 times [2022-11-03 03:38:57,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:38:57,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350930852] [2022-11-03 03:38:57,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:38:57,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:38:58,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:38:58,597 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:38:58,597 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:38:58,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350930852] [2022-11-03 03:38:58,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350930852] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:38:58,598 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:38:58,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:38:58,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915021520] [2022-11-03 03:38:58,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:38:58,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:38:58,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:38:58,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:38:58,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:38:58,601 INFO L87 Difference]: Start difference. First operand 116 states and 176 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:39:00,615 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:39:01,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:39:01,264 INFO L93 Difference]: Finished difference Result 321 states and 487 transitions. [2022-11-03 03:39:01,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:39:01,265 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 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 40 [2022-11-03 03:39:01,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:39:01,267 INFO L225 Difference]: With dead ends: 321 [2022-11-03 03:39:01,267 INFO L226 Difference]: Without dead ends: 217 [2022-11-03 03:39:01,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:39:01,269 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 119 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 52 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:39:01,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 221 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 231 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2022-11-03 03:39:01,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2022-11-03 03:39:01,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 126. [2022-11-03 03:39:01,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.512) internal successors, (189), 125 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:39:01,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 189 transitions. [2022-11-03 03:39:01,285 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 189 transitions. Word has length 40 [2022-11-03 03:39:01,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:39:01,285 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 189 transitions. [2022-11-03 03:39:01,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:39:01,286 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 189 transitions. [2022-11-03 03:39:01,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-03 03:39:01,287 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:39:01,287 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:39:01,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 03:39:01,288 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:39:01,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:39:01,289 INFO L85 PathProgramCache]: Analyzing trace with hash 937174827, now seen corresponding path program 1 times [2022-11-03 03:39:01,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:39:01,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544365153] [2022-11-03 03:39:01,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:39:01,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:39:01,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:39:01,834 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:39:01,835 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:39:01,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544365153] [2022-11-03 03:39:01,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544365153] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:39:01,841 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:39:01,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:39:01,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176483707] [2022-11-03 03:39:01,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:39:01,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:39:01,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:39:01,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:39:01,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:39:01,844 INFO L87 Difference]: Start difference. First operand 126 states and 189 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:39:03,857 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:39:04,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:39:04,532 INFO L93 Difference]: Finished difference Result 331 states and 499 transitions. [2022-11-03 03:39:04,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:39:04,533 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 3 states have internal predecessors, (41), 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 41 [2022-11-03 03:39:04,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:39:04,534 INFO L225 Difference]: With dead ends: 331 [2022-11-03 03:39:04,534 INFO L226 Difference]: Without dead ends: 217 [2022-11-03 03:39:04,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:39:04,536 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 117 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 52 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-03 03:39:04,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 221 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 231 Invalid, 1 Unknown, 0 Unchecked, 2.7s Time] [2022-11-03 03:39:04,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2022-11-03 03:39:04,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 127. [2022-11-03 03:39:04,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.5) internal successors, (189), 126 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:39:04,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 189 transitions. [2022-11-03 03:39:04,547 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 189 transitions. Word has length 41 [2022-11-03 03:39:04,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:39:04,547 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 189 transitions. [2022-11-03 03:39:04,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:39:04,548 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 189 transitions. [2022-11-03 03:39:04,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-03 03:39:04,549 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:39:04,549 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:39:04,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 03:39:04,550 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:39:04,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:39:04,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1600964730, now seen corresponding path program 1 times [2022-11-03 03:39:04,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:39:04,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182252576] [2022-11-03 03:39:04,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:39:04,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:39:04,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:39:04,998 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:39:04,999 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:39:04,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182252576] [2022-11-03 03:39:04,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182252576] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:39:04,999 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:39:05,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:39:05,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390933067] [2022-11-03 03:39:05,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:39:05,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:39:05,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:39:05,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:39:05,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:39:05,002 INFO L87 Difference]: Start difference. First operand 127 states and 189 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:39:07,015 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:39:07,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:39:07,395 INFO L93 Difference]: Finished difference Result 254 states and 375 transitions. [2022-11-03 03:39:07,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:39:07,397 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 3 states have internal predecessors, (41), 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 41 [2022-11-03 03:39:07,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:39:07,398 INFO L225 Difference]: With dead ends: 254 [2022-11-03 03:39:07,398 INFO L226 Difference]: Without dead ends: 139 [2022-11-03 03:39:07,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:39:07,400 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 11 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:39:07,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 324 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 149 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2022-11-03 03:39:07,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-11-03 03:39:07,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 127. [2022-11-03 03:39:07,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.492063492063492) internal successors, (188), 126 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:39:07,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 188 transitions. [2022-11-03 03:39:07,430 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 188 transitions. Word has length 41 [2022-11-03 03:39:07,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:39:07,430 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 188 transitions. [2022-11-03 03:39:07,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:39:07,431 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 188 transitions. [2022-11-03 03:39:07,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-03 03:39:07,436 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:39:07,436 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:39:07,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 03:39:07,437 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:39:07,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:39:07,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1346880773, now seen corresponding path program 1 times [2022-11-03 03:39:07,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:39:07,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053184713] [2022-11-03 03:39:07,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:39:07,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:39:07,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:39:07,861 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:39:07,862 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:39:07,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053184713] [2022-11-03 03:39:07,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053184713] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:39:07,862 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:39:07,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:39:07,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903408286] [2022-11-03 03:39:07,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:39:07,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:39:07,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:39:07,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:39:07,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:39:07,864 INFO L87 Difference]: Start difference. First operand 127 states and 188 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:39:09,876 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:39:10,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:39:10,287 INFO L93 Difference]: Finished difference Result 254 states and 374 transitions. [2022-11-03 03:39:10,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:39:10,288 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 3 states have internal predecessors, (41), 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 41 [2022-11-03 03:39:10,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:39:10,290 INFO L225 Difference]: With dead ends: 254 [2022-11-03 03:39:10,290 INFO L226 Difference]: Without dead ends: 139 [2022-11-03 03:39:10,291 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:39:10,292 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 9 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:39:10,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 325 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 148 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2022-11-03 03:39:10,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-11-03 03:39:10,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 127. [2022-11-03 03:39:10,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.4841269841269842) internal successors, (187), 126 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:39:10,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 187 transitions. [2022-11-03 03:39:10,301 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 187 transitions. Word has length 41 [2022-11-03 03:39:10,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:39:10,301 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 187 transitions. [2022-11-03 03:39:10,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:39:10,301 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 187 transitions. [2022-11-03 03:39:10,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-03 03:39:10,302 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:39:10,302 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:39:10,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 03:39:10,303 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:39:10,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:39:10,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1885808468, now seen corresponding path program 1 times [2022-11-03 03:39:10,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:39:10,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544484852] [2022-11-03 03:39:10,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:39:10,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:39:10,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:39:10,756 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:39:10,757 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:39:10,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544484852] [2022-11-03 03:39:10,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544484852] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:39:10,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:39:10,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:39:10,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137424661] [2022-11-03 03:39:10,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:39:10,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:39:10,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:39:10,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:39:10,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:39:10,760 INFO L87 Difference]: Start difference. First operand 127 states and 187 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:39:12,773 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:39:13,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:39:13,318 INFO L93 Difference]: Finished difference Result 332 states and 496 transitions. [2022-11-03 03:39:13,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:39:13,319 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 3 states have internal predecessors, (42), 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 42 [2022-11-03 03:39:13,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:39:13,320 INFO L225 Difference]: With dead ends: 332 [2022-11-03 03:39:13,320 INFO L226 Difference]: Without dead ends: 217 [2022-11-03 03:39:13,321 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:39:13,321 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 112 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 52 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:39:13,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 221 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 231 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2022-11-03 03:39:13,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2022-11-03 03:39:13,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 131. [2022-11-03 03:39:13,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.4846153846153847) internal successors, (193), 130 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:39:13,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 193 transitions. [2022-11-03 03:39:13,331 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 193 transitions. Word has length 42 [2022-11-03 03:39:13,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:39:13,332 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 193 transitions. [2022-11-03 03:39:13,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:39:13,332 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 193 transitions. [2022-11-03 03:39:13,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-03 03:39:13,333 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:39:13,333 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:39:13,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-03 03:39:13,334 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:39:13,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:39:13,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1091110920, now seen corresponding path program 1 times [2022-11-03 03:39:13,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:39:13,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983104321] [2022-11-03 03:39:13,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:39:13,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:39:13,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:39:13,807 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:39:13,808 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:39:13,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983104321] [2022-11-03 03:39:13,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983104321] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:39:13,808 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:39:13,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:39:13,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227417062] [2022-11-03 03:39:13,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:39:13,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:39:13,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:39:13,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:39:13,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:39:13,812 INFO L87 Difference]: Start difference. First operand 131 states and 193 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:39:15,826 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:39:16,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:39:16,196 INFO L93 Difference]: Finished difference Result 260 states and 384 transitions. [2022-11-03 03:39:16,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:39:16,198 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 3 states have internal predecessors, (42), 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 42 [2022-11-03 03:39:16,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:39:16,199 INFO L225 Difference]: With dead ends: 260 [2022-11-03 03:39:16,199 INFO L226 Difference]: Without dead ends: 141 [2022-11-03 03:39:16,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:39:16,200 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 11 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:39:16,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 328 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 145 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2022-11-03 03:39:16,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-11-03 03:39:16,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 131. [2022-11-03 03:39:16,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.476923076923077) internal successors, (192), 130 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:39:16,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 192 transitions. [2022-11-03 03:39:16,208 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 192 transitions. Word has length 42 [2022-11-03 03:39:16,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:39:16,209 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 192 transitions. [2022-11-03 03:39:16,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:39:16,209 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 192 transitions. [2022-11-03 03:39:16,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-03 03:39:16,210 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:39:16,210 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:39:16,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-03 03:39:16,211 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:39:16,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:39:16,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1618107046, now seen corresponding path program 1 times [2022-11-03 03:39:16,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:39:16,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74970396] [2022-11-03 03:39:16,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:39:16,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:39:16,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:39:16,685 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:39:16,686 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:39:16,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74970396] [2022-11-03 03:39:16,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74970396] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:39:16,686 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:39:16,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:39:16,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862846615] [2022-11-03 03:39:16,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:39:16,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:39:16,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:39:16,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:39:16,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:39:16,689 INFO L87 Difference]: Start difference. First operand 131 states and 192 transitions. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:39:18,703 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:39:19,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:39:19,274 INFO L93 Difference]: Finished difference Result 336 states and 500 transitions. [2022-11-03 03:39:19,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:39:19,274 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 3 states have internal predecessors, (43), 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 43 [2022-11-03 03:39:19,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:39:19,276 INFO L225 Difference]: With dead ends: 336 [2022-11-03 03:39:19,276 INFO L226 Difference]: Without dead ends: 217 [2022-11-03 03:39:19,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:39:19,277 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 113 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 52 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:39:19,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 221 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 231 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2022-11-03 03:39:19,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2022-11-03 03:39:19,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 131. [2022-11-03 03:39:19,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.4615384615384615) internal successors, (190), 130 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:39:19,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 190 transitions. [2022-11-03 03:39:19,285 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 190 transitions. Word has length 43 [2022-11-03 03:39:19,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:39:19,285 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 190 transitions. [2022-11-03 03:39:19,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:39:19,286 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 190 transitions. [2022-11-03 03:39:19,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-03 03:39:19,287 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:39:19,287 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:39:19,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-03 03:39:19,288 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:39:19,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:39:19,288 INFO L85 PathProgramCache]: Analyzing trace with hash -939077214, now seen corresponding path program 1 times [2022-11-03 03:39:19,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:39:19,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459693147] [2022-11-03 03:39:19,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:39:19,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:39:19,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:39:19,702 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:39:19,702 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:39:19,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459693147] [2022-11-03 03:39:19,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459693147] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:39:19,703 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:39:19,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:39:19,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113190827] [2022-11-03 03:39:19,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:39:19,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:39:19,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:39:19,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:39:19,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:39:19,705 INFO L87 Difference]: Start difference. First operand 131 states and 190 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:39:21,717 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:39:22,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:39:22,274 INFO L93 Difference]: Finished difference Result 351 states and 518 transitions. [2022-11-03 03:39:22,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:39:22,276 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 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 44 [2022-11-03 03:39:22,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:39:22,277 INFO L225 Difference]: With dead ends: 351 [2022-11-03 03:39:22,277 INFO L226 Difference]: Without dead ends: 232 [2022-11-03 03:39:22,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:39:22,278 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 96 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 48 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:39:22,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 242 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 236 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2022-11-03 03:39:22,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-11-03 03:39:22,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 157. [2022-11-03 03:39:22,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.4871794871794872) internal successors, (232), 156 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:39:22,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 232 transitions. [2022-11-03 03:39:22,287 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 232 transitions. Word has length 44 [2022-11-03 03:39:22,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:39:22,287 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 232 transitions. [2022-11-03 03:39:22,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:39:22,288 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 232 transitions. [2022-11-03 03:39:22,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-03 03:39:22,289 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:39:22,289 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:39:22,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-03 03:39:22,289 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:39:22,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:39:22,290 INFO L85 PathProgramCache]: Analyzing trace with hash -952951858, now seen corresponding path program 1 times [2022-11-03 03:39:22,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:39:22,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807028787] [2022-11-03 03:39:22,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:39:22,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:39:22,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:39:22,702 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:39:22,703 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:39:22,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807028787] [2022-11-03 03:39:22,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807028787] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:39:22,703 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:39:22,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:39:22,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194502562] [2022-11-03 03:39:22,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:39:22,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:39:22,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:39:22,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:39:22,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:39:22,707 INFO L87 Difference]: Start difference. First operand 157 states and 232 transitions. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:39:24,720 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:39:25,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:39:25,269 INFO L93 Difference]: Finished difference Result 388 states and 581 transitions. [2022-11-03 03:39:25,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:39:25,270 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 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 45 [2022-11-03 03:39:25,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:39:25,271 INFO L225 Difference]: With dead ends: 388 [2022-11-03 03:39:25,271 INFO L226 Difference]: Without dead ends: 243 [2022-11-03 03:39:25,272 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:39:25,272 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 95 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 50 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:39:25,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 242 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 235 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2022-11-03 03:39:25,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-11-03 03:39:25,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 169. [2022-11-03 03:39:25,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 1.5178571428571428) internal successors, (255), 168 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:39:25,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 255 transitions. [2022-11-03 03:39:25,282 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 255 transitions. Word has length 45 [2022-11-03 03:39:25,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:39:25,284 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 255 transitions. [2022-11-03 03:39:25,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:39:25,285 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 255 transitions. [2022-11-03 03:39:25,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-03 03:39:25,285 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:39:25,286 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:39:25,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-03 03:39:25,287 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:39:25,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:39:25,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1794267519, now seen corresponding path program 1 times [2022-11-03 03:39:25,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:39:25,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538840814] [2022-11-03 03:39:25,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:39:25,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:39:25,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:39:25,699 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:39:25,699 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:39:25,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538840814] [2022-11-03 03:39:25,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538840814] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:39:25,700 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:39:25,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:39:25,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722989205] [2022-11-03 03:39:25,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:39:25,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:39:25,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:39:25,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:39:25,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:39:25,702 INFO L87 Difference]: Start difference. First operand 169 states and 255 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:39:27,714 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:39:28,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:39:28,245 INFO L93 Difference]: Finished difference Result 427 states and 646 transitions. [2022-11-03 03:39:28,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:39:28,246 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 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 50 [2022-11-03 03:39:28,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:39:28,247 INFO L225 Difference]: With dead ends: 427 [2022-11-03 03:39:28,247 INFO L226 Difference]: Without dead ends: 270 [2022-11-03 03:39:28,248 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:39:28,248 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 84 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 46 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:39:28,249 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 242 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 237 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2022-11-03 03:39:28,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2022-11-03 03:39:28,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 206. [2022-11-03 03:39:28,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 1.5463414634146342) internal successors, (317), 205 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:39:28,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 317 transitions. [2022-11-03 03:39:28,259 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 317 transitions. Word has length 50 [2022-11-03 03:39:28,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:39:28,260 INFO L495 AbstractCegarLoop]: Abstraction has 206 states and 317 transitions. [2022-11-03 03:39:28,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:39:28,260 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 317 transitions. [2022-11-03 03:39:28,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-03 03:39:28,261 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:39:28,261 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:39:28,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-03 03:39:28,262 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:39:28,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:39:28,262 INFO L85 PathProgramCache]: Analyzing trace with hash 205244584, now seen corresponding path program 1 times [2022-11-03 03:39:28,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:39:28,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587217060] [2022-11-03 03:39:28,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:39:28,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:39:28,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:39:28,631 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:39:28,631 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:39:28,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587217060] [2022-11-03 03:39:28,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587217060] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:39:28,632 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:39:28,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:39:28,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112967706] [2022-11-03 03:39:28,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:39:28,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:39:28,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:39:28,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:39:28,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:39:28,634 INFO L87 Difference]: Start difference. First operand 206 states and 317 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:39:30,647 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:39:31,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:39:31,058 INFO L93 Difference]: Finished difference Result 434 states and 669 transitions. [2022-11-03 03:39:31,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:39:31,060 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 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 51 [2022-11-03 03:39:31,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:39:31,061 INFO L225 Difference]: With dead ends: 434 [2022-11-03 03:39:31,061 INFO L226 Difference]: Without dead ends: 240 [2022-11-03 03:39:31,062 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:39:31,062 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 17 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:39:31,063 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 333 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 164 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2022-11-03 03:39:31,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-11-03 03:39:31,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 226. [2022-11-03 03:39:31,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 1.5422222222222222) internal successors, (347), 225 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:39:31,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 347 transitions. [2022-11-03 03:39:31,073 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 347 transitions. Word has length 51 [2022-11-03 03:39:31,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:39:31,073 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 347 transitions. [2022-11-03 03:39:31,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:39:31,074 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 347 transitions. [2022-11-03 03:39:31,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-03 03:39:31,075 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:39:31,075 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:39:31,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-03 03:39:31,075 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:39:31,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:39:31,076 INFO L85 PathProgramCache]: Analyzing trace with hash 409417979, now seen corresponding path program 1 times [2022-11-03 03:39:31,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:39:31,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068081775] [2022-11-03 03:39:31,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:39:31,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:39:31,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:39:31,492 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:39:31,492 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:39:31,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068081775] [2022-11-03 03:39:31,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068081775] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:39:31,492 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:39:31,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:39:31,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220415581] [2022-11-03 03:39:31,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:39:31,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:39:31,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:39:31,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:39:31,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:39:31,494 INFO L87 Difference]: Start difference. First operand 226 states and 347 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:39:33,506 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:39:33,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:39:33,927 INFO L93 Difference]: Finished difference Result 454 states and 698 transitions. [2022-11-03 03:39:33,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:39:33,929 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 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 61 [2022-11-03 03:39:33,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:39:33,930 INFO L225 Difference]: With dead ends: 454 [2022-11-03 03:39:33,930 INFO L226 Difference]: Without dead ends: 240 [2022-11-03 03:39:33,931 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:39:33,932 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 28 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:39:33,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 335 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 161 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2022-11-03 03:39:33,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-11-03 03:39:33,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 226. [2022-11-03 03:39:33,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 1.5377777777777777) internal successors, (346), 225 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:39:33,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 346 transitions. [2022-11-03 03:39:33,942 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 346 transitions. Word has length 61 [2022-11-03 03:39:33,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:39:33,943 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 346 transitions. [2022-11-03 03:39:33,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:39:33,943 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 346 transitions. [2022-11-03 03:39:33,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-03 03:39:33,944 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:39:33,944 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:39:33,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-03 03:39:33,945 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:39:33,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:39:33,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1451788195, now seen corresponding path program 1 times [2022-11-03 03:39:33,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:39:33,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246674144] [2022-11-03 03:39:33,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:39:33,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:39:34,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:39:34,307 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:39:34,307 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:39:34,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246674144] [2022-11-03 03:39:34,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246674144] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:39:34,308 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:39:34,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:39:34,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436590517] [2022-11-03 03:39:34,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:39:34,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:39:34,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:39:34,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:39:34,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:39:34,310 INFO L87 Difference]: Start difference. First operand 226 states and 346 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:39:36,323 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:39:36,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:39:36,736 INFO L93 Difference]: Finished difference Result 452 states and 694 transitions. [2022-11-03 03:39:36,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:39:36,738 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 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 63 [2022-11-03 03:39:36,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:39:36,739 INFO L225 Difference]: With dead ends: 452 [2022-11-03 03:39:36,740 INFO L226 Difference]: Without dead ends: 238 [2022-11-03 03:39:36,740 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:39:36,741 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 22 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:39:36,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 337 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 159 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2022-11-03 03:39:36,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-11-03 03:39:36,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 226. [2022-11-03 03:39:36,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 1.5333333333333334) internal successors, (345), 225 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:39:36,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 345 transitions. [2022-11-03 03:39:36,751 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 345 transitions. Word has length 63 [2022-11-03 03:39:36,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:39:36,752 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 345 transitions. [2022-11-03 03:39:36,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:39:36,752 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 345 transitions. [2022-11-03 03:39:36,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-03 03:39:36,753 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:39:36,753 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:39:36,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-03 03:39:36,754 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:39:36,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:39:36,754 INFO L85 PathProgramCache]: Analyzing trace with hash -20162190, now seen corresponding path program 1 times [2022-11-03 03:39:36,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:39:36,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219233574] [2022-11-03 03:39:36,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:39:36,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:39:36,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:39:37,151 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:39:37,152 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:39:37,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219233574] [2022-11-03 03:39:37,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219233574] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:39:37,154 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:39:37,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:39:37,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095270289] [2022-11-03 03:39:37,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:39:37,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:39:37,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:39:37,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:39:37,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:39:37,156 INFO L87 Difference]: Start difference. First operand 226 states and 345 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:39:39,169 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:39:39,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:39:39,741 INFO L93 Difference]: Finished difference Result 514 states and 783 transitions. [2022-11-03 03:39:39,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:39:39,742 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 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 63 [2022-11-03 03:39:39,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:39:39,744 INFO L225 Difference]: With dead ends: 514 [2022-11-03 03:39:39,744 INFO L226 Difference]: Without dead ends: 300 [2022-11-03 03:39:39,744 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:39:39,745 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 106 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 49 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:39:39,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 243 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 235 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2022-11-03 03:39:39,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2022-11-03 03:39:39,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 226. [2022-11-03 03:39:39,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 1.5155555555555555) internal successors, (341), 225 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:39:39,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 341 transitions. [2022-11-03 03:39:39,758 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 341 transitions. Word has length 63 [2022-11-03 03:39:39,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:39:39,758 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 341 transitions. [2022-11-03 03:39:39,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:39:39,759 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 341 transitions. [2022-11-03 03:39:39,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-03 03:39:39,760 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:39:39,760 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:39:39,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-03 03:39:39,760 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:39:39,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:39:39,761 INFO L85 PathProgramCache]: Analyzing trace with hash -2063163995, now seen corresponding path program 1 times [2022-11-03 03:39:39,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:39:39,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155143785] [2022-11-03 03:39:39,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:39:39,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:39:39,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:39:40,435 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:39:40,435 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:39:40,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155143785] [2022-11-03 03:39:40,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155143785] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:39:40,436 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:39:40,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:39:40,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426999787] [2022-11-03 03:39:40,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:39:40,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:39:40,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:39:40,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:39:40,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:39:40,438 INFO L87 Difference]: Start difference. First operand 226 states and 341 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:39:42,451 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:39:43,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:39:43,041 INFO L93 Difference]: Finished difference Result 448 states and 680 transitions. [2022-11-03 03:39:43,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:39:43,043 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 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 64 [2022-11-03 03:39:43,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:39:43,044 INFO L225 Difference]: With dead ends: 448 [2022-11-03 03:39:43,044 INFO L226 Difference]: Without dead ends: 234 [2022-11-03 03:39:43,045 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:39:43,045 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 116 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 32 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:39:43,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 234 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 268 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2022-11-03 03:39:43,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-11-03 03:39:43,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 233. [2022-11-03 03:39:43,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 1.4913793103448276) internal successors, (346), 232 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:39:43,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 346 transitions. [2022-11-03 03:39:43,058 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 346 transitions. Word has length 64 [2022-11-03 03:39:43,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:39:43,058 INFO L495 AbstractCegarLoop]: Abstraction has 233 states and 346 transitions. [2022-11-03 03:39:43,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:39:43,059 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 346 transitions. [2022-11-03 03:39:43,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-03 03:39:43,060 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:39:43,060 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:39:43,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-03 03:39:43,060 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:39:43,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:39:43,061 INFO L85 PathProgramCache]: Analyzing trace with hash -901250162, now seen corresponding path program 1 times [2022-11-03 03:39:43,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:39:43,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546913462] [2022-11-03 03:39:43,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:39:43,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:39:43,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:39:43,472 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:39:43,473 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:39:43,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546913462] [2022-11-03 03:39:43,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546913462] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:39:43,473 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:39:43,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:39:43,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236036996] [2022-11-03 03:39:43,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:39:43,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:39:43,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:39:43,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:39:43,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:39:43,475 INFO L87 Difference]: Start difference. First operand 233 states and 346 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:39:45,489 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:39:45,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:39:45,864 INFO L93 Difference]: Finished difference Result 458 states and 684 transitions. [2022-11-03 03:39:45,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:39:45,865 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 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 65 [2022-11-03 03:39:45,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:39:45,867 INFO L225 Difference]: With dead ends: 458 [2022-11-03 03:39:45,867 INFO L226 Difference]: Without dead ends: 237 [2022-11-03 03:39:45,867 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:39:45,868 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 19 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:39:45,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 347 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 149 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2022-11-03 03:39:45,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-11-03 03:39:45,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 233. [2022-11-03 03:39:45,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 1.4870689655172413) internal successors, (345), 232 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:39:45,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 345 transitions. [2022-11-03 03:39:45,880 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 345 transitions. Word has length 65 [2022-11-03 03:39:45,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:39:45,880 INFO L495 AbstractCegarLoop]: Abstraction has 233 states and 345 transitions. [2022-11-03 03:39:45,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:39:45,880 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 345 transitions. [2022-11-03 03:39:45,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-03 03:39:45,881 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:39:45,881 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:39:45,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-03 03:39:45,882 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:39:45,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:39:45,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1089341275, now seen corresponding path program 1 times [2022-11-03 03:39:45,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:39:45,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771650368] [2022-11-03 03:39:45,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:39:45,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:39:45,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:39:46,317 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:39:46,317 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:39:46,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771650368] [2022-11-03 03:39:46,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771650368] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:39:46,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409006162] [2022-11-03 03:39:46,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:39:46,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:39:46,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe509752-14c1-410e-81a3-1f5373608fc7/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:39:46,321 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe509752-14c1-410e-81a3-1f5373608fc7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:39:46,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe509752-14c1-410e-81a3-1f5373608fc7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 03:39:47,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:39:47,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 903 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 03:39:47,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:39:47,392 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:39:47,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:39:47,612 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-03 03:39:47,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409006162] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 03:39:47,613 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:39:47,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4, 4] total 5 [2022-11-03 03:39:47,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808605954] [2022-11-03 03:39:47,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:39:47,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:39:47,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:39:47,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:39:47,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:39:47,616 INFO L87 Difference]: Start difference. First operand 233 states and 345 transitions. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 2 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:39:49,630 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:39:49,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:39:49,816 INFO L93 Difference]: Finished difference Result 451 states and 675 transitions. [2022-11-03 03:39:49,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:39:49,817 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 2 states have internal predecessors, (45), 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 69 [2022-11-03 03:39:49,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:39:49,819 INFO L225 Difference]: With dead ends: 451 [2022-11-03 03:39:49,819 INFO L226 Difference]: Without dead ends: 449 [2022-11-03 03:39:49,820 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 134 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:39:49,820 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 106 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:39:49,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 277 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-11-03 03:39:49,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2022-11-03 03:39:49,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 447. [2022-11-03 03:39:49,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 446 states have (on average 1.5022421524663676) internal successors, (670), 446 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:39:49,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 670 transitions. [2022-11-03 03:39:49,844 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 670 transitions. Word has length 69 [2022-11-03 03:39:49,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:39:49,844 INFO L495 AbstractCegarLoop]: Abstraction has 447 states and 670 transitions. [2022-11-03 03:39:49,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 2 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:39:49,845 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 670 transitions. [2022-11-03 03:39:49,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-03 03:39:49,846 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:39:49,846 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2022-11-03 03:39:49,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe509752-14c1-410e-81a3-1f5373608fc7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 03:39:50,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe509752-14c1-410e-81a3-1f5373608fc7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:39:50,075 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:39:50,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:39:50,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1519569628, now seen corresponding path program 1 times [2022-11-03 03:39:50,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:39:50,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492219985] [2022-11-03 03:39:50,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:39:50,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:39:50,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:39:50,663 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-03 03:39:50,663 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:39:50,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492219985] [2022-11-03 03:39:50,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492219985] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:39:50,664 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:39:50,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:39:50,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124268887] [2022-11-03 03:39:50,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:39:50,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:39:50,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:39:50,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:39:50,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:39:50,666 INFO L87 Difference]: Start difference. First operand 447 states and 670 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:39:52,678 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:39:53,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:39:53,274 INFO L93 Difference]: Finished difference Result 1026 states and 1531 transitions. [2022-11-03 03:39:53,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:39:53,276 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 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 91 [2022-11-03 03:39:53,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:39:53,278 INFO L225 Difference]: With dead ends: 1026 [2022-11-03 03:39:53,278 INFO L226 Difference]: Without dead ends: 591 [2022-11-03 03:39:53,279 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:39:53,280 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 83 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 45 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:39:53,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 252 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 235 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2022-11-03 03:39:53,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2022-11-03 03:39:53,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 469. [2022-11-03 03:39:53,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 468 states have (on average 1.5213675213675213) internal successors, (712), 468 states have internal predecessors, (712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:39:53,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 712 transitions. [2022-11-03 03:39:53,309 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 712 transitions. Word has length 91 [2022-11-03 03:39:53,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:39:53,309 INFO L495 AbstractCegarLoop]: Abstraction has 469 states and 712 transitions. [2022-11-03 03:39:53,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:39:53,310 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 712 transitions. [2022-11-03 03:39:53,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-03 03:39:53,311 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:39:53,311 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2022-11-03 03:39:53,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-03 03:39:53,312 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:39:53,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:39:53,312 INFO L85 PathProgramCache]: Analyzing trace with hash 562513584, now seen corresponding path program 1 times [2022-11-03 03:39:53,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:39:53,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254596474] [2022-11-03 03:39:53,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:39:53,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:39:53,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:39:53,991 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:39:53,992 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:39:53,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254596474] [2022-11-03 03:39:53,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254596474] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:39:53,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372286640] [2022-11-03 03:39:53,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:39:53,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:39:53,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe509752-14c1-410e-81a3-1f5373608fc7/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:39:53,994 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe509752-14c1-410e-81a3-1f5373608fc7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:39:54,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe509752-14c1-410e-81a3-1f5373608fc7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 03:39:54,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:39:54,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 1108 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 03:39:54,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:39:55,253 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:39:55,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:39:55,589 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-11-03 03:39:55,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372286640] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 03:39:55,590 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:39:55,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6, 6] total 7 [2022-11-03 03:39:55,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478671716] [2022-11-03 03:39:55,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:39:55,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:39:55,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:39:55,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:39:55,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:39:55,591 INFO L87 Difference]: Start difference. First operand 469 states and 712 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 2 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:39:57,605 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:39:57,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:39:57,786 INFO L93 Difference]: Finished difference Result 701 states and 1065 transitions. [2022-11-03 03:39:57,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:39:57,787 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 2 states have internal predecessors, (49), 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 109 [2022-11-03 03:39:57,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:39:57,789 INFO L225 Difference]: With dead ends: 701 [2022-11-03 03:39:57,789 INFO L226 Difference]: Without dead ends: 699 [2022-11-03 03:39:57,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 212 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:39:57,790 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 107 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:39:57,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 276 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-11-03 03:39:57,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2022-11-03 03:39:57,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 695. [2022-11-03 03:39:57,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 694 states have (on average 1.5273775216138328) internal successors, (1060), 694 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:39:57,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 1060 transitions. [2022-11-03 03:39:57,825 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 1060 transitions. Word has length 109 [2022-11-03 03:39:57,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:39:57,825 INFO L495 AbstractCegarLoop]: Abstraction has 695 states and 1060 transitions. [2022-11-03 03:39:57,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 2 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:39:57,825 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 1060 transitions. [2022-11-03 03:39:57,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-11-03 03:39:57,830 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:39:57,830 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:39:57,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe509752-14c1-410e-81a3-1f5373608fc7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 03:39:58,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe509752-14c1-410e-81a3-1f5373608fc7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:39:58,059 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:39:58,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:39:58,059 INFO L85 PathProgramCache]: Analyzing trace with hash 179842261, now seen corresponding path program 1 times [2022-11-03 03:39:58,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:39:58,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045353776] [2022-11-03 03:39:58,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:39:58,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:39:58,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:39:58,569 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 114 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-03 03:39:58,570 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:39:58,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045353776] [2022-11-03 03:39:58,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045353776] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:39:58,570 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:39:58,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:39:58,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323562046] [2022-11-03 03:39:58,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:39:58,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:39:58,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:39:58,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:39:58,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:39:58,572 INFO L87 Difference]: Start difference. First operand 695 states and 1060 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:40:00,587 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:40:01,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:40:01,233 INFO L93 Difference]: Finished difference Result 1776 states and 2700 transitions. [2022-11-03 03:40:01,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:40:01,243 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 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 118 [2022-11-03 03:40:01,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:40:01,248 INFO L225 Difference]: With dead ends: 1776 [2022-11-03 03:40:01,248 INFO L226 Difference]: Without dead ends: 1093 [2022-11-03 03:40:01,249 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:40:01,250 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 89 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 36 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:40:01,250 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 250 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 231 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2022-11-03 03:40:01,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1093 states. [2022-11-03 03:40:01,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1093 to 875. [2022-11-03 03:40:01,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 875 states, 874 states have (on average 1.528604118993135) internal successors, (1336), 874 states have internal predecessors, (1336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:40:01,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 1336 transitions. [2022-11-03 03:40:01,297 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 1336 transitions. Word has length 118 [2022-11-03 03:40:01,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:40:01,297 INFO L495 AbstractCegarLoop]: Abstraction has 875 states and 1336 transitions. [2022-11-03 03:40:01,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:40:01,297 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 1336 transitions. [2022-11-03 03:40:01,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-03 03:40:01,300 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:40:01,300 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:40:01,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-03 03:40:01,300 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:40:01,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:40:01,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1992238246, now seen corresponding path program 1 times [2022-11-03 03:40:01,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:40:01,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452730919] [2022-11-03 03:40:01,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:40:01,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:40:01,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:40:01,791 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-03 03:40:01,792 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:40:01,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452730919] [2022-11-03 03:40:01,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452730919] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:40:01,792 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:40:01,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:40:01,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641486036] [2022-11-03 03:40:01,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:40:01,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:40:01,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:40:01,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:40:01,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:40:01,795 INFO L87 Difference]: Start difference. First operand 875 states and 1336 transitions. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:40:03,809 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:40:04,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:40:04,322 INFO L93 Difference]: Finished difference Result 1866 states and 2833 transitions. [2022-11-03 03:40:04,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:40:04,323 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 123 [2022-11-03 03:40:04,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:40:04,327 INFO L225 Difference]: With dead ends: 1866 [2022-11-03 03:40:04,328 INFO L226 Difference]: Without dead ends: 1003 [2022-11-03 03:40:04,329 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:40:04,335 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 25 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:40:04,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 399 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 192 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2022-11-03 03:40:04,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1003 states. [2022-11-03 03:40:04,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1003 to 947. [2022-11-03 03:40:04,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 947 states, 946 states have (on average 1.5264270613107822) internal successors, (1444), 946 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:40:04,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 947 states to 947 states and 1444 transitions. [2022-11-03 03:40:04,383 INFO L78 Accepts]: Start accepts. Automaton has 947 states and 1444 transitions. Word has length 123 [2022-11-03 03:40:04,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:40:04,384 INFO L495 AbstractCegarLoop]: Abstraction has 947 states and 1444 transitions. [2022-11-03 03:40:04,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:40:04,384 INFO L276 IsEmpty]: Start isEmpty. Operand 947 states and 1444 transitions. [2022-11-03 03:40:04,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-11-03 03:40:04,387 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:40:04,387 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:40:04,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-03 03:40:04,388 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:40:04,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:40:04,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1257851154, now seen corresponding path program 1 times [2022-11-03 03:40:04,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:40:04,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671955915] [2022-11-03 03:40:04,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:40:04,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:40:04,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:40:04,964 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 114 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-03 03:40:04,965 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:40:04,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671955915] [2022-11-03 03:40:04,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671955915] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:40:04,965 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:40:04,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:40:04,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597471368] [2022-11-03 03:40:04,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:40:04,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:40:04,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:40:04,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:40:04,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:40:04,967 INFO L87 Difference]: Start difference. First operand 947 states and 1444 transitions. Second operand has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:40:06,980 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:40:07,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:40:07,543 INFO L93 Difference]: Finished difference Result 2064 states and 3114 transitions. [2022-11-03 03:40:07,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:40:07,546 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 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 [2022-11-03 03:40:07,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:40:07,550 INFO L225 Difference]: With dead ends: 2064 [2022-11-03 03:40:07,550 INFO L226 Difference]: Without dead ends: 1129 [2022-11-03 03:40:07,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:40:07,553 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 95 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 45 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:40:07,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 246 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 234 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2022-11-03 03:40:07,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1129 states. [2022-11-03 03:40:07,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1129 to 947. [2022-11-03 03:40:07,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 947 states, 946 states have (on average 1.5105708245243128) internal successors, (1429), 946 states have internal predecessors, (1429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:40:07,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 947 states to 947 states and 1429 transitions. [2022-11-03 03:40:07,606 INFO L78 Accepts]: Start accepts. Automaton has 947 states and 1429 transitions. Word has length 126 [2022-11-03 03:40:07,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:40:07,606 INFO L495 AbstractCegarLoop]: Abstraction has 947 states and 1429 transitions. [2022-11-03 03:40:07,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:40:07,607 INFO L276 IsEmpty]: Start isEmpty. Operand 947 states and 1429 transitions. [2022-11-03 03:40:07,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-03 03:40:07,609 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:40:07,610 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:40:07,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-11-03 03:40:07,610 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:40:07,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:40:07,611 INFO L85 PathProgramCache]: Analyzing trace with hash -109223670, now seen corresponding path program 1 times [2022-11-03 03:40:07,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:40:07,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032328118] [2022-11-03 03:40:07,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:40:07,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:40:07,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:40:08,209 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 116 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-03 03:40:08,209 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:40:08,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032328118] [2022-11-03 03:40:08,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032328118] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:40:08,210 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:40:08,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:40:08,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905099578] [2022-11-03 03:40:08,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:40:08,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:40:08,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:40:08,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:40:08,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:40:08,212 INFO L87 Difference]: Start difference. First operand 947 states and 1429 transitions. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:40:10,225 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:40:10,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:40:10,785 INFO L93 Difference]: Finished difference Result 2064 states and 3084 transitions. [2022-11-03 03:40:10,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:40:10,786 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 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 [2022-11-03 03:40:10,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:40:10,790 INFO L225 Difference]: With dead ends: 2064 [2022-11-03 03:40:10,790 INFO L226 Difference]: Without dead ends: 1129 [2022-11-03 03:40:10,792 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:40:10,792 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 94 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 43 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:40:10,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 282 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 233 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2022-11-03 03:40:10,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1129 states. [2022-11-03 03:40:10,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1129 to 947. [2022-11-03 03:40:10,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 947 states, 946 states have (on average 1.4947145877378436) internal successors, (1414), 946 states have internal predecessors, (1414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:40:10,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 947 states to 947 states and 1414 transitions. [2022-11-03 03:40:10,846 INFO L78 Accepts]: Start accepts. Automaton has 947 states and 1414 transitions. Word has length 127 [2022-11-03 03:40:10,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:40:10,847 INFO L495 AbstractCegarLoop]: Abstraction has 947 states and 1414 transitions. [2022-11-03 03:40:10,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:40:10,847 INFO L276 IsEmpty]: Start isEmpty. Operand 947 states and 1414 transitions. [2022-11-03 03:40:10,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-03 03:40:10,850 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:40:10,850 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:40:10,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-11-03 03:40:10,851 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:40:10,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:40:10,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1504996864, now seen corresponding path program 1 times [2022-11-03 03:40:10,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:40:10,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971810656] [2022-11-03 03:40:10,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:40:10,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:40:10,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:40:11,312 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 135 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-11-03 03:40:11,313 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:40:11,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971810656] [2022-11-03 03:40:11,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971810656] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:40:11,313 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:40:11,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:40:11,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092877732] [2022-11-03 03:40:11,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:40:11,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:40:11,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:40:11,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:40:11,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:40:11,316 INFO L87 Difference]: Start difference. First operand 947 states and 1414 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:40:13,331 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:40:13,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:40:13,795 INFO L93 Difference]: Finished difference Result 1932 states and 2872 transitions. [2022-11-03 03:40:13,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:40:13,797 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2022-11-03 03:40:13,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:40:13,800 INFO L225 Difference]: With dead ends: 1932 [2022-11-03 03:40:13,800 INFO L226 Difference]: Without dead ends: 997 [2022-11-03 03:40:13,802 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:40:13,802 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 34 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:40:13,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 397 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 182 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2022-11-03 03:40:13,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2022-11-03 03:40:13,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 947. [2022-11-03 03:40:13,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 947 states, 946 states have (on average 1.4915433403805496) internal successors, (1411), 946 states have internal predecessors, (1411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:40:13,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 947 states to 947 states and 1411 transitions. [2022-11-03 03:40:13,856 INFO L78 Accepts]: Start accepts. Automaton has 947 states and 1411 transitions. Word has length 130 [2022-11-03 03:40:13,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:40:13,856 INFO L495 AbstractCegarLoop]: Abstraction has 947 states and 1411 transitions. [2022-11-03 03:40:13,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:40:13,857 INFO L276 IsEmpty]: Start isEmpty. Operand 947 states and 1411 transitions. [2022-11-03 03:40:13,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-03 03:40:13,859 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:40:13,859 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:40:13,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-11-03 03:40:13,860 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:40:13,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:40:13,861 INFO L85 PathProgramCache]: Analyzing trace with hash 49593996, now seen corresponding path program 1 times [2022-11-03 03:40:13,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:40:13,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765934890] [2022-11-03 03:40:13,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:40:13,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:40:13,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:40:14,317 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-11-03 03:40:14,318 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:40:14,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765934890] [2022-11-03 03:40:14,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765934890] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:40:14,318 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:40:14,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:40:14,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426737132] [2022-11-03 03:40:14,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:40:14,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:40:14,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:40:14,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:40:14,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:40:14,320 INFO L87 Difference]: Start difference. First operand 947 states and 1411 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:40:16,333 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:40:16,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:40:16,903 INFO L93 Difference]: Finished difference Result 2040 states and 3021 transitions. [2022-11-03 03:40:16,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:40:16,904 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 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 [2022-11-03 03:40:16,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:40:16,907 INFO L225 Difference]: With dead ends: 2040 [2022-11-03 03:40:16,908 INFO L226 Difference]: Without dead ends: 1105 [2022-11-03 03:40:16,909 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:40:16,910 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 103 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 37 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:40:16,910 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 284 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 226 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2022-11-03 03:40:16,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1105 states. [2022-11-03 03:40:16,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1105 to 947. [2022-11-03 03:40:16,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 947 states, 946 states have (on average 1.4725158562367864) internal successors, (1393), 946 states have internal predecessors, (1393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:40:16,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 947 states to 947 states and 1393 transitions. [2022-11-03 03:40:16,964 INFO L78 Accepts]: Start accepts. Automaton has 947 states and 1393 transitions. Word has length 137 [2022-11-03 03:40:16,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:40:16,965 INFO L495 AbstractCegarLoop]: Abstraction has 947 states and 1393 transitions. [2022-11-03 03:40:16,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:40:16,965 INFO L276 IsEmpty]: Start isEmpty. Operand 947 states and 1393 transitions. [2022-11-03 03:40:16,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-11-03 03:40:16,968 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:40:16,968 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:40:16,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-11-03 03:40:16,968 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:40:16,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:40:16,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1300517768, now seen corresponding path program 1 times [2022-11-03 03:40:16,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:40:16,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801789586] [2022-11-03 03:40:16,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:40:16,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:40:17,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:40:17,426 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 147 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-03 03:40:17,426 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:40:17,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801789586] [2022-11-03 03:40:17,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801789586] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:40:17,427 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:40:17,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:40:17,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035258924] [2022-11-03 03:40:17,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:40:17,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:40:17,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:40:17,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:40:17,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:40:17,429 INFO L87 Difference]: Start difference. First operand 947 states and 1393 transitions. Second operand has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:40:19,442 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:40:20,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:40:20,105 INFO L93 Difference]: Finished difference Result 1328 states and 1947 transitions. [2022-11-03 03:40:20,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:40:20,108 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 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 140 [2022-11-03 03:40:20,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:40:20,111 INFO L225 Difference]: With dead ends: 1328 [2022-11-03 03:40:20,111 INFO L226 Difference]: Without dead ends: 1012 [2022-11-03 03:40:20,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:40:20,113 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 44 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:40:20,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 422 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 236 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2022-11-03 03:40:20,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1012 states. [2022-11-03 03:40:20,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1012 to 982. [2022-11-03 03:40:20,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 982 states, 981 states have (on average 1.472986748216106) internal successors, (1445), 981 states have internal predecessors, (1445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:40:20,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 982 states to 982 states and 1445 transitions. [2022-11-03 03:40:20,166 INFO L78 Accepts]: Start accepts. Automaton has 982 states and 1445 transitions. Word has length 140 [2022-11-03 03:40:20,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:40:20,167 INFO L495 AbstractCegarLoop]: Abstraction has 982 states and 1445 transitions. [2022-11-03 03:40:20,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:40:20,167 INFO L276 IsEmpty]: Start isEmpty. Operand 982 states and 1445 transitions. [2022-11-03 03:40:20,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-11-03 03:40:20,170 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:40:20,170 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:40:20,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-11-03 03:40:20,171 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:40:20,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:40:20,171 INFO L85 PathProgramCache]: Analyzing trace with hash -2035142567, now seen corresponding path program 2 times [2022-11-03 03:40:20,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:40:20,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012005614] [2022-11-03 03:40:20,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:40:20,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:40:20,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:40:20,726 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 164 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-11-03 03:40:20,727 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:40:20,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012005614] [2022-11-03 03:40:20,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012005614] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:40:20,727 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:40:20,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:40:20,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818012001] [2022-11-03 03:40:20,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:40:20,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:40:20,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:40:20,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:40:20,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:40:20,730 INFO L87 Difference]: Start difference. First operand 982 states and 1445 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:40:22,745 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:40:23,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:40:23,287 INFO L93 Difference]: Finished difference Result 2110 states and 3089 transitions. [2022-11-03 03:40:23,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:40:23,288 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 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 141 [2022-11-03 03:40:23,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:40:23,292 INFO L225 Difference]: With dead ends: 2110 [2022-11-03 03:40:23,292 INFO L226 Difference]: Without dead ends: 1140 [2022-11-03 03:40:23,293 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:40:23,293 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 94 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 35 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:40:23,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 315 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 233 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2022-11-03 03:40:23,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1140 states. [2022-11-03 03:40:23,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1140 to 982. [2022-11-03 03:40:23,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 982 states, 981 states have (on average 1.4536187563710499) internal successors, (1426), 981 states have internal predecessors, (1426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:40:23,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 982 states to 982 states and 1426 transitions. [2022-11-03 03:40:23,352 INFO L78 Accepts]: Start accepts. Automaton has 982 states and 1426 transitions. Word has length 141 [2022-11-03 03:40:23,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:40:23,352 INFO L495 AbstractCegarLoop]: Abstraction has 982 states and 1426 transitions. [2022-11-03 03:40:23,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:40:23,352 INFO L276 IsEmpty]: Start isEmpty. Operand 982 states and 1426 transitions. [2022-11-03 03:40:23,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-11-03 03:40:23,355 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:40:23,355 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:40:23,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-11-03 03:40:23,356 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:40:23,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:40:23,356 INFO L85 PathProgramCache]: Analyzing trace with hash 656249279, now seen corresponding path program 1 times [2022-11-03 03:40:23,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:40:23,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813673161] [2022-11-03 03:40:23,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:40:23,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:40:23,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:40:23,884 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 147 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-03 03:40:23,884 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:40:23,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813673161] [2022-11-03 03:40:23,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813673161] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:40:23,885 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:40:23,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:40:23,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550921518] [2022-11-03 03:40:23,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:40:23,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:40:23,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:40:23,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:40:23,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:40:23,887 INFO L87 Difference]: Start difference. First operand 982 states and 1426 transitions. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:40:25,900 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:40:26,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:40:26,458 INFO L93 Difference]: Finished difference Result 2218 states and 3213 transitions. [2022-11-03 03:40:26,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:40:26,467 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 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 141 [2022-11-03 03:40:26,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:40:26,471 INFO L225 Difference]: With dead ends: 2218 [2022-11-03 03:40:26,472 INFO L226 Difference]: Without dead ends: 1248 [2022-11-03 03:40:26,473 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:40:26,474 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 99 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 39 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:40:26,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 254 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 223 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2022-11-03 03:40:26,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2022-11-03 03:40:26,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 1024. [2022-11-03 03:40:26,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1024 states, 1023 states have (on average 1.4310850439882699) internal successors, (1464), 1023 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:40:26,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1024 states to 1024 states and 1464 transitions. [2022-11-03 03:40:26,536 INFO L78 Accepts]: Start accepts. Automaton has 1024 states and 1464 transitions. Word has length 141 [2022-11-03 03:40:26,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:40:26,536 INFO L495 AbstractCegarLoop]: Abstraction has 1024 states and 1464 transitions. [2022-11-03 03:40:26,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:40:26,537 INFO L276 IsEmpty]: Start isEmpty. Operand 1024 states and 1464 transitions. [2022-11-03 03:40:26,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-11-03 03:40:26,539 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:40:26,539 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:40:26,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-11-03 03:40:26,540 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:40:26,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:40:26,540 INFO L85 PathProgramCache]: Analyzing trace with hash -465619291, now seen corresponding path program 1 times [2022-11-03 03:40:26,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:40:26,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690794232] [2022-11-03 03:40:26,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:40:26,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:40:26,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:40:26,967 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 149 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-03 03:40:26,967 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:40:26,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690794232] [2022-11-03 03:40:26,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690794232] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:40:26,968 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:40:26,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:40:26,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157784600] [2022-11-03 03:40:26,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:40:26,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:40:26,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:40:26,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:40:26,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:40:26,971 INFO L87 Difference]: Start difference. First operand 1024 states and 1464 transitions. Second operand has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:40:28,983 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:40:29,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:40:29,489 INFO L93 Difference]: Finished difference Result 1415 states and 2018 transitions. [2022-11-03 03:40:29,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:40:29,491 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 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 141 [2022-11-03 03:40:29,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:40:29,495 INFO L225 Difference]: With dead ends: 1415 [2022-11-03 03:40:29,496 INFO L226 Difference]: Without dead ends: 1050 [2022-11-03 03:40:29,496 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:40:29,497 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 39 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:40:29,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 414 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 228 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2022-11-03 03:40:29,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1050 states. [2022-11-03 03:40:29,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1050 to 1025. [2022-11-03 03:40:29,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1025 states, 1024 states have (on average 1.4306640625) internal successors, (1465), 1024 states have internal predecessors, (1465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:40:29,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1025 states to 1025 states and 1465 transitions. [2022-11-03 03:40:29,557 INFO L78 Accepts]: Start accepts. Automaton has 1025 states and 1465 transitions. Word has length 141 [2022-11-03 03:40:29,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:40:29,557 INFO L495 AbstractCegarLoop]: Abstraction has 1025 states and 1465 transitions. [2022-11-03 03:40:29,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:40:29,558 INFO L276 IsEmpty]: Start isEmpty. Operand 1025 states and 1465 transitions. [2022-11-03 03:40:29,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-11-03 03:40:29,560 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:40:29,560 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:40:29,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-11-03 03:40:29,561 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:40:29,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:40:29,561 INFO L85 PathProgramCache]: Analyzing trace with hash -367070699, now seen corresponding path program 1 times [2022-11-03 03:40:29,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:40:29,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273590642] [2022-11-03 03:40:29,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:40:29,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:40:29,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:40:29,960 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 167 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-11-03 03:40:29,961 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:40:29,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273590642] [2022-11-03 03:40:29,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273590642] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:40:29,961 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:40:29,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:40:29,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179504389] [2022-11-03 03:40:29,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:40:29,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:40:29,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:40:29,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:40:29,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:40:29,963 INFO L87 Difference]: Start difference. First operand 1025 states and 1465 transitions. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:40:31,976 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:40:32,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:40:32,493 INFO L93 Difference]: Finished difference Result 2196 states and 3129 transitions. [2022-11-03 03:40:32,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:40:32,493 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 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 142 [2022-11-03 03:40:32,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:40:32,496 INFO L225 Difference]: With dead ends: 2196 [2022-11-03 03:40:32,496 INFO L226 Difference]: Without dead ends: 1183 [2022-11-03 03:40:32,498 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:40:32,498 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 93 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 40 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:40:32,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 258 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 225 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2022-11-03 03:40:32,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1183 states. [2022-11-03 03:40:32,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1183 to 1025. [2022-11-03 03:40:32,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1025 states, 1024 states have (on average 1.412109375) internal successors, (1446), 1024 states have internal predecessors, (1446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:40:32,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1025 states to 1025 states and 1446 transitions. [2022-11-03 03:40:32,562 INFO L78 Accepts]: Start accepts. Automaton has 1025 states and 1446 transitions. Word has length 142 [2022-11-03 03:40:32,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:40:32,563 INFO L495 AbstractCegarLoop]: Abstraction has 1025 states and 1446 transitions. [2022-11-03 03:40:32,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:40:32,563 INFO L276 IsEmpty]: Start isEmpty. Operand 1025 states and 1446 transitions. [2022-11-03 03:40:32,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-11-03 03:40:32,566 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:40:32,567 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:40:32,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-11-03 03:40:32,567 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:40:32,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:40:32,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1475258286, now seen corresponding path program 1 times [2022-11-03 03:40:32,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:40:32,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745700728] [2022-11-03 03:40:32,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:40:32,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:40:32,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:40:33,189 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:40:33,190 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:40:33,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745700728] [2022-11-03 03:40:33,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745700728] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:40:33,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457792309] [2022-11-03 03:40:33,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:40:33,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:40:33,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe509752-14c1-410e-81a3-1f5373608fc7/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:40:33,192 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe509752-14c1-410e-81a3-1f5373608fc7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:40:33,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe509752-14c1-410e-81a3-1f5373608fc7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 03:40:34,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:40:34,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 1209 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 03:40:34,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:40:34,667 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:40:34,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:40:35,265 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-11-03 03:40:35,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457792309] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:40:35,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1476606521] [2022-11-03 03:40:35,317 INFO L159 IcfgInterpreter]: Started Sifa with 53 locations of interest [2022-11-03 03:40:35,318 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:40:35,322 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:40:35,327 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:40:35,328 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:40:37,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:38,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:38,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:38,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:39,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:39,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:39,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:40,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:40,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:40,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:40:40,381 INFO L244 Elim1Store]: Index analysis took 1169 ms