./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc8c1317-2294-444c-9d9f-3a337214e7a9/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc8c1317-2294-444c-9d9f-3a337214e7a9/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc8c1317-2294-444c-9d9f-3a337214e7a9/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc8c1317-2294-444c-9d9f-3a337214e7a9/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc8c1317-2294-444c-9d9f-3a337214e7a9/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc8c1317-2294-444c-9d9f-3a337214e7a9/bin/utaipan-I9t0OCRTmS --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 776b90327165ac118ff91f6400c534443904a40947197045cc27be476415edd1 --- 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-8393723 [2022-11-19 08:01:59,635 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 08:01:59,637 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 08:01:59,668 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 08:01:59,668 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 08:01:59,669 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 08:01:59,679 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 08:01:59,688 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 08:01:59,691 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 08:01:59,694 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 08:01:59,695 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 08:01:59,696 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 08:01:59,697 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 08:01:59,698 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 08:01:59,699 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 08:01:59,700 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 08:01:59,701 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 08:01:59,702 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 08:01:59,708 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 08:01:59,718 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 08:01:59,720 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 08:01:59,729 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 08:01:59,731 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 08:01:59,733 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 08:01:59,737 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 08:01:59,740 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 08:01:59,740 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 08:01:59,741 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 08:01:59,743 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 08:01:59,744 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 08:01:59,745 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 08:01:59,746 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 08:01:59,747 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 08:01:59,749 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 08:01:59,751 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 08:01:59,752 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 08:01:59,752 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 08:01:59,753 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 08:01:59,753 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 08:01:59,754 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 08:01:59,755 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 08:01:59,755 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc8c1317-2294-444c-9d9f-3a337214e7a9/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 08:01:59,798 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 08:01:59,799 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 08:01:59,800 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 08:01:59,800 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 08:01:59,801 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 08:01:59,801 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 08:01:59,801 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 08:01:59,802 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 08:01:59,802 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 08:01:59,802 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 08:01:59,803 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 08:01:59,803 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 08:01:59,804 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 08:01:59,804 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 08:01:59,804 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 08:01:59,804 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 08:01:59,805 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 08:01:59,805 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 08:01:59,806 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 08:01:59,806 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 08:01:59,806 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 08:01:59,806 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 08:01:59,806 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 08:01:59,807 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 08:01:59,808 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 08:01:59,809 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 08:01:59,809 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 08:01:59,809 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 08:01:59,809 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 08:01:59,809 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 08:01:59,810 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 08:01:59,810 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 08:01:59,810 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:01:59,811 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 08:01:59,811 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 08:01:59,811 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 08:01:59,811 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 08:01:59,812 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 08:01:59,812 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 08:01:59,812 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 08:01:59,812 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 08:01:59,812 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_fc8c1317-2294-444c-9d9f-3a337214e7a9/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc8c1317-2294-444c-9d9f-3a337214e7a9/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 776b90327165ac118ff91f6400c534443904a40947197045cc27be476415edd1 [2022-11-19 08:02:00,127 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 08:02:00,158 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 08:02:00,162 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 08:02:00,163 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 08:02:00,164 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 08:02:00,165 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc8c1317-2294-444c-9d9f-3a337214e7a9/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2022-11-19 08:02:00,249 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc8c1317-2294-444c-9d9f-3a337214e7a9/bin/utaipan-I9t0OCRTmS/data/c193c6d94/0f69670c1f14456ebc178336623f2a8b/FLAG13c682960 [2022-11-19 08:02:00,855 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 08:02:00,855 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc8c1317-2294-444c-9d9f-3a337214e7a9/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2022-11-19 08:02:00,877 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc8c1317-2294-444c-9d9f-3a337214e7a9/bin/utaipan-I9t0OCRTmS/data/c193c6d94/0f69670c1f14456ebc178336623f2a8b/FLAG13c682960 [2022-11-19 08:02:01,159 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc8c1317-2294-444c-9d9f-3a337214e7a9/bin/utaipan-I9t0OCRTmS/data/c193c6d94/0f69670c1f14456ebc178336623f2a8b [2022-11-19 08:02:01,164 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 08:02:01,167 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 08:02:01,170 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 08:02:01,170 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 08:02:01,174 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 08:02:01,175 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:02:01" (1/1) ... [2022-11-19 08:02:01,176 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3bf2c805 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:01, skipping insertion in model container [2022-11-19 08:02:01,176 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:02:01" (1/1) ... [2022-11-19 08:02:01,184 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 08:02:01,240 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 08:02:01,577 WARN L234 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_fc8c1317-2294-444c-9d9f-3a337214e7a9/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c[12832,12845] [2022-11-19 08:02:01,681 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:02:01,696 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 08:02:01,776 WARN L234 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_fc8c1317-2294-444c-9d9f-3a337214e7a9/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c[12832,12845] [2022-11-19 08:02:01,848 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:02:01,885 INFO L208 MainTranslator]: Completed translation [2022-11-19 08:02:01,885 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:01 WrapperNode [2022-11-19 08:02:01,886 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 08:02:01,887 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 08:02:01,887 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 08:02:01,887 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 08:02:01,898 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:01" (1/1) ... [2022-11-19 08:02:01,928 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:01" (1/1) ... [2022-11-19 08:02:02,020 INFO L138 Inliner]: procedures = 23, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 1292 [2022-11-19 08:02:02,021 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 08:02:02,022 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 08:02:02,022 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 08:02:02,022 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 08:02:02,037 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:01" (1/1) ... [2022-11-19 08:02:02,037 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:01" (1/1) ... [2022-11-19 08:02:02,042 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:01" (1/1) ... [2022-11-19 08:02:02,042 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:01" (1/1) ... [2022-11-19 08:02:02,066 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:01" (1/1) ... [2022-11-19 08:02:02,075 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:01" (1/1) ... [2022-11-19 08:02:02,084 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:01" (1/1) ... [2022-11-19 08:02:02,088 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:01" (1/1) ... [2022-11-19 08:02:02,094 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 08:02:02,095 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 08:02:02,095 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 08:02:02,095 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 08:02:02,096 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:01" (1/1) ... [2022-11-19 08:02:02,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:02:02,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc8c1317-2294-444c-9d9f-3a337214e7a9/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:02:02,131 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc8c1317-2294-444c-9d9f-3a337214e7a9/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 08:02:02,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc8c1317-2294-444c-9d9f-3a337214e7a9/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 08:02:02,196 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 08:02:02,198 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 08:02:02,198 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 08:02:02,198 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 08:02:02,421 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 08:02:02,424 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 08:02:03,508 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 08:02:03,926 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 08:02:03,926 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-19 08:02:03,931 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:02:03 BoogieIcfgContainer [2022-11-19 08:02:03,931 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 08:02:03,934 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 08:02:03,934 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 08:02:03,937 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 08:02:03,938 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:02:01" (1/3) ... [2022-11-19 08:02:03,939 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14b7488e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:02:03, skipping insertion in model container [2022-11-19 08:02:03,939 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:01" (2/3) ... [2022-11-19 08:02:03,939 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14b7488e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:02:03, skipping insertion in model container [2022-11-19 08:02:03,939 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:02:03" (3/3) ... [2022-11-19 08:02:03,942 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2022-11-19 08:02:03,961 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 08:02:03,962 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 08:02:04,062 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 08:02:04,074 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;@1b38a56f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 08:02:04,075 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 08:02:04,080 INFO L276 IsEmpty]: Start isEmpty. Operand has 256 states, 254 states have (on average 1.6811023622047243) internal successors, (427), 255 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:02:04,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-19 08:02:04,101 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:02:04,102 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:02:04,102 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:02:04,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:02:04,110 INFO L85 PathProgramCache]: Analyzing trace with hash -931180938, now seen corresponding path program 1 times [2022-11-19 08:02:04,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:02:04,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342092538] [2022-11-19 08:02:04,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:02:04,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:02:04,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:02:04,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:02:04,733 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:02:04,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342092538] [2022-11-19 08:02:04,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342092538] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:02:04,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:02:04,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:02:04,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000223455] [2022-11-19 08:02:04,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:02:04,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:02:04,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:02:04,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:02:04,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:02:04,787 INFO L87 Difference]: Start difference. First operand has 256 states, 254 states have (on average 1.6811023622047243) internal successors, (427), 255 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 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) [2022-11-19 08:02:05,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:02:05,002 INFO L93 Difference]: Finished difference Result 423 states and 696 transitions. [2022-11-19 08:02:05,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:02:05,005 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 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 102 [2022-11-19 08:02:05,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:02:05,018 INFO L225 Difference]: With dead ends: 423 [2022-11-19 08:02:05,018 INFO L226 Difference]: Without dead ends: 327 [2022-11-19 08:02:05,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:02:05,025 INFO L413 NwaCegarLoop]: 505 mSDtfsCounter, 148 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 862 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:02:05,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 862 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:02:05,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2022-11-19 08:02:05,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 325. [2022-11-19 08:02:05,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 1.5339506172839505) internal successors, (497), 324 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:02:05,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 497 transitions. [2022-11-19 08:02:05,094 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 497 transitions. Word has length 102 [2022-11-19 08:02:05,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:02:05,095 INFO L495 AbstractCegarLoop]: Abstraction has 325 states and 497 transitions. [2022-11-19 08:02:05,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 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) [2022-11-19 08:02:05,095 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 497 transitions. [2022-11-19 08:02:05,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-11-19 08:02:05,098 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:02:05,098 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:02:05,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 08:02:05,099 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:02:05,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:02:05,100 INFO L85 PathProgramCache]: Analyzing trace with hash -807122640, now seen corresponding path program 1 times [2022-11-19 08:02:05,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:02:05,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130029455] [2022-11-19 08:02:05,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:02:05,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:02:05,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:02:05,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:02:05,390 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:02:05,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130029455] [2022-11-19 08:02:05,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130029455] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:02:05,392 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:02:05,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:02:05,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289633388] [2022-11-19 08:02:05,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:02:05,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:02:05,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:02:05,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:02:05,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:02:05,396 INFO L87 Difference]: Start difference. First operand 325 states and 497 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:02:05,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:02:05,591 INFO L93 Difference]: Finished difference Result 577 states and 903 transitions. [2022-11-19 08:02:05,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:02:05,592 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 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 104 [2022-11-19 08:02:05,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:02:05,598 INFO L225 Difference]: With dead ends: 577 [2022-11-19 08:02:05,599 INFO L226 Difference]: Without dead ends: 416 [2022-11-19 08:02:05,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:02:05,609 INFO L413 NwaCegarLoop]: 347 mSDtfsCounter, 136 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 657 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:02:05,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 657 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:02:05,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2022-11-19 08:02:05,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 414. [2022-11-19 08:02:05,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 1.5423728813559323) internal successors, (637), 413 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:02:05,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 637 transitions. [2022-11-19 08:02:05,647 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 637 transitions. Word has length 104 [2022-11-19 08:02:05,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:02:05,648 INFO L495 AbstractCegarLoop]: Abstraction has 414 states and 637 transitions. [2022-11-19 08:02:05,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:02:05,649 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 637 transitions. [2022-11-19 08:02:05,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-11-19 08:02:05,651 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:02:05,651 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:02:05,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 08:02:05,652 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:02:05,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:02:05,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1007750748, now seen corresponding path program 1 times [2022-11-19 08:02:05,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:02:05,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165873793] [2022-11-19 08:02:05,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:02:05,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:02:05,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:02:05,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:02:05,803 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:02:05,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165873793] [2022-11-19 08:02:05,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165873793] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:02:05,803 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:02:05,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:02:05,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522967436] [2022-11-19 08:02:05,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:02:05,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:02:05,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:02:05,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:02:05,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:02:05,805 INFO L87 Difference]: Start difference. First operand 414 states and 637 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:02:05,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:02:05,958 INFO L93 Difference]: Finished difference Result 859 states and 1354 transitions. [2022-11-19 08:02:05,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:02:05,959 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 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 107 [2022-11-19 08:02:05,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:02:05,962 INFO L225 Difference]: With dead ends: 859 [2022-11-19 08:02:05,962 INFO L226 Difference]: Without dead ends: 611 [2022-11-19 08:02:05,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:02:05,964 INFO L413 NwaCegarLoop]: 428 mSDtfsCounter, 136 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 747 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:02:05,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 747 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:02:05,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2022-11-19 08:02:06,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 609. [2022-11-19 08:02:06,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 609 states, 608 states have (on average 1.5641447368421053) internal successors, (951), 608 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:02:06,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 609 states to 609 states and 951 transitions. [2022-11-19 08:02:06,027 INFO L78 Accepts]: Start accepts. Automaton has 609 states and 951 transitions. Word has length 107 [2022-11-19 08:02:06,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:02:06,030 INFO L495 AbstractCegarLoop]: Abstraction has 609 states and 951 transitions. [2022-11-19 08:02:06,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:02:06,030 INFO L276 IsEmpty]: Start isEmpty. Operand 609 states and 951 transitions. [2022-11-19 08:02:06,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-19 08:02:06,041 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:02:06,041 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:02:06,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 08:02:06,042 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:02:06,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:02:06,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1771710272, now seen corresponding path program 1 times [2022-11-19 08:02:06,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:02:06,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281262182] [2022-11-19 08:02:06,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:02:06,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:02:06,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:02:06,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:02:06,216 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:02:06,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281262182] [2022-11-19 08:02:06,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281262182] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:02:06,216 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:02:06,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:02:06,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739240632] [2022-11-19 08:02:06,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:02:06,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:02:06,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:02:06,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:02:06,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:02:06,219 INFO L87 Difference]: Start difference. First operand 609 states and 951 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:02:06,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:02:06,393 INFO L93 Difference]: Finished difference Result 1318 states and 2090 transitions. [2022-11-19 08:02:06,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:02:06,394 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 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 [2022-11-19 08:02:06,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:02:06,398 INFO L225 Difference]: With dead ends: 1318 [2022-11-19 08:02:06,399 INFO L226 Difference]: Without dead ends: 875 [2022-11-19 08:02:06,400 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:02:06,401 INFO L413 NwaCegarLoop]: 356 mSDtfsCounter, 135 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 673 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:02:06,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 673 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:02:06,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 875 states. [2022-11-19 08:02:06,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 875 to 873. [2022-11-19 08:02:06,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 873 states, 872 states have (on average 1.5745412844036697) internal successors, (1373), 872 states have internal predecessors, (1373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:02:06,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 873 states to 873 states and 1373 transitions. [2022-11-19 08:02:06,473 INFO L78 Accepts]: Start accepts. Automaton has 873 states and 1373 transitions. Word has length 109 [2022-11-19 08:02:06,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:02:06,473 INFO L495 AbstractCegarLoop]: Abstraction has 873 states and 1373 transitions. [2022-11-19 08:02:06,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:02:06,474 INFO L276 IsEmpty]: Start isEmpty. Operand 873 states and 1373 transitions. [2022-11-19 08:02:06,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-19 08:02:06,475 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:02:06,475 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:02:06,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 08:02:06,476 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:02:06,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:02:06,476 INFO L85 PathProgramCache]: Analyzing trace with hash -328915782, now seen corresponding path program 1 times [2022-11-19 08:02:06,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:02:06,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905229173] [2022-11-19 08:02:06,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:02:06,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:02:06,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:02:06,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:02:06,598 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:02:06,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905229173] [2022-11-19 08:02:06,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905229173] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:02:06,598 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:02:06,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:02:06,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56947443] [2022-11-19 08:02:06,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:02:06,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:02:06,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:02:06,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:02:06,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:02:06,600 INFO L87 Difference]: Start difference. First operand 873 states and 1373 transitions. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:02:06,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:02:06,855 INFO L93 Difference]: Finished difference Result 2098 states and 3346 transitions. [2022-11-19 08:02:06,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:02:06,856 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 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 112 [2022-11-19 08:02:06,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:02:06,861 INFO L225 Difference]: With dead ends: 2098 [2022-11-19 08:02:06,862 INFO L226 Difference]: Without dead ends: 1409 [2022-11-19 08:02:06,863 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:02:06,864 INFO L413 NwaCegarLoop]: 400 mSDtfsCounter, 130 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 720 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:02:06,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 720 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:02:06,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1409 states. [2022-11-19 08:02:06,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1409 to 1407. [2022-11-19 08:02:06,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1407 states, 1406 states have (on average 1.5846372688477952) internal successors, (2228), 1406 states have internal predecessors, (2228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:02:06,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1407 states to 1407 states and 2228 transitions. [2022-11-19 08:02:06,990 INFO L78 Accepts]: Start accepts. Automaton has 1407 states and 2228 transitions. Word has length 112 [2022-11-19 08:02:06,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:02:06,990 INFO L495 AbstractCegarLoop]: Abstraction has 1407 states and 2228 transitions. [2022-11-19 08:02:06,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:02:06,990 INFO L276 IsEmpty]: Start isEmpty. Operand 1407 states and 2228 transitions. [2022-11-19 08:02:06,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-19 08:02:06,992 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:02:06,992 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:02:06,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-19 08:02:06,992 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:02:06,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:02:06,993 INFO L85 PathProgramCache]: Analyzing trace with hash -659507780, now seen corresponding path program 1 times [2022-11-19 08:02:06,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:02:06,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640949643] [2022-11-19 08:02:06,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:02:06,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:02:07,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:02:07,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:02:07,133 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:02:07,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640949643] [2022-11-19 08:02:07,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640949643] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:02:07,133 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:02:07,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:02:07,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899666441] [2022-11-19 08:02:07,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:02:07,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:02:07,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:02:07,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:02:07,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:02:07,135 INFO L87 Difference]: Start difference. First operand 1407 states and 2228 transitions. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:02:07,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:02:07,420 INFO L93 Difference]: Finished difference Result 3337 states and 5326 transitions. [2022-11-19 08:02:07,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:02:07,421 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 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 114 [2022-11-19 08:02:07,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:02:07,429 INFO L225 Difference]: With dead ends: 3337 [2022-11-19 08:02:07,429 INFO L226 Difference]: Without dead ends: 2114 [2022-11-19 08:02:07,431 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:02:07,432 INFO L413 NwaCegarLoop]: 357 mSDtfsCounter, 129 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 675 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:02:07,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 675 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:02:07,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2114 states. [2022-11-19 08:02:07,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2114 to 2112. [2022-11-19 08:02:07,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2112 states, 2111 states have (on average 1.5883467550923733) internal successors, (3353), 2111 states have internal predecessors, (3353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:02:07,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2112 states to 2112 states and 3353 transitions. [2022-11-19 08:02:07,680 INFO L78 Accepts]: Start accepts. Automaton has 2112 states and 3353 transitions. Word has length 114 [2022-11-19 08:02:07,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:02:07,681 INFO L495 AbstractCegarLoop]: Abstraction has 2112 states and 3353 transitions. [2022-11-19 08:02:07,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:02:07,681 INFO L276 IsEmpty]: Start isEmpty. Operand 2112 states and 3353 transitions. [2022-11-19 08:02:07,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-19 08:02:07,683 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:02:07,683 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:02:07,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-19 08:02:07,683 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:02:07,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:02:07,684 INFO L85 PathProgramCache]: Analyzing trace with hash -348180324, now seen corresponding path program 1 times [2022-11-19 08:02:07,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:02:07,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372439889] [2022-11-19 08:02:07,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:02:07,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:02:07,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:02:07,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:02:07,794 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:02:07,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372439889] [2022-11-19 08:02:07,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372439889] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:02:07,794 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:02:07,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:02:07,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248847005] [2022-11-19 08:02:07,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:02:07,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:02:07,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:02:07,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:02:07,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:02:07,796 INFO L87 Difference]: Start difference. First operand 2112 states and 3353 transitions. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 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) [2022-11-19 08:02:08,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:02:08,362 INFO L93 Difference]: Finished difference Result 5473 states and 8746 transitions. [2022-11-19 08:02:08,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:02:08,363 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 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 117 [2022-11-19 08:02:08,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:02:08,376 INFO L225 Difference]: With dead ends: 5473 [2022-11-19 08:02:08,376 INFO L226 Difference]: Without dead ends: 3563 [2022-11-19 08:02:08,381 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:02:08,384 INFO L413 NwaCegarLoop]: 372 mSDtfsCounter, 124 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 693 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:02:08,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 693 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:02:08,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3563 states. [2022-11-19 08:02:08,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3563 to 3561. [2022-11-19 08:02:08,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3561 states, 3560 states have (on average 1.5890449438202248) internal successors, (5657), 3560 states have internal predecessors, (5657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:02:08,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3561 states to 3561 states and 5657 transitions. [2022-11-19 08:02:08,828 INFO L78 Accepts]: Start accepts. Automaton has 3561 states and 5657 transitions. Word has length 117 [2022-11-19 08:02:08,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:02:08,828 INFO L495 AbstractCegarLoop]: Abstraction has 3561 states and 5657 transitions. [2022-11-19 08:02:08,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 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) [2022-11-19 08:02:08,829 INFO L276 IsEmpty]: Start isEmpty. Operand 3561 states and 5657 transitions. [2022-11-19 08:02:08,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-11-19 08:02:08,830 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:02:08,830 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:02:08,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-19 08:02:08,831 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:02:08,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:02:08,831 INFO L85 PathProgramCache]: Analyzing trace with hash -582704553, now seen corresponding path program 1 times [2022-11-19 08:02:08,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:02:08,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736557504] [2022-11-19 08:02:08,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:02:08,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:02:08,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:02:08,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:02:08,969 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:02:08,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736557504] [2022-11-19 08:02:08,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736557504] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:02:08,969 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:02:08,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:02:08,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559212646] [2022-11-19 08:02:08,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:02:08,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:02:08,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:02:08,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:02:08,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:02:08,971 INFO L87 Difference]: Start difference. First operand 3561 states and 5657 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:02:09,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:02:09,564 INFO L93 Difference]: Finished difference Result 8848 states and 14110 transitions. [2022-11-19 08:02:09,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:02:09,565 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 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 119 [2022-11-19 08:02:09,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:02:09,585 INFO L225 Difference]: With dead ends: 8848 [2022-11-19 08:02:09,587 INFO L226 Difference]: Without dead ends: 5489 [2022-11-19 08:02:09,593 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:02:09,594 INFO L413 NwaCegarLoop]: 358 mSDtfsCounter, 123 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 677 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:02:09,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 677 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:02:09,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5489 states. [2022-11-19 08:02:10,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5489 to 5487. [2022-11-19 08:02:10,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5487 states, 5486 states have (on average 1.588953700328108) internal successors, (8717), 5486 states have internal predecessors, (8717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:02:10,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5487 states to 5487 states and 8717 transitions. [2022-11-19 08:02:10,309 INFO L78 Accepts]: Start accepts. Automaton has 5487 states and 8717 transitions. Word has length 119 [2022-11-19 08:02:10,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:02:10,315 INFO L495 AbstractCegarLoop]: Abstraction has 5487 states and 8717 transitions. [2022-11-19 08:02:10,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:02:10,315 INFO L276 IsEmpty]: Start isEmpty. Operand 5487 states and 8717 transitions. [2022-11-19 08:02:10,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-11-19 08:02:10,317 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:02:10,317 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:02:10,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-19 08:02:10,317 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:02:10,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:02:10,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1787106275, now seen corresponding path program 1 times [2022-11-19 08:02:10,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:02:10,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050931881] [2022-11-19 08:02:10,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:02:10,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:02:10,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:02:10,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:02:10,545 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:02:10,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050931881] [2022-11-19 08:02:10,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050931881] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:02:10,545 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:02:10,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 08:02:10,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800452102] [2022-11-19 08:02:10,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:02:10,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 08:02:10,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:02:10,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 08:02:10,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:02:10,550 INFO L87 Difference]: Start difference. First operand 5487 states and 8717 transitions. Second operand has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 6 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:02:11,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:02:11,936 INFO L93 Difference]: Finished difference Result 13731 states and 21804 transitions. [2022-11-19 08:02:11,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 08:02:11,937 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 6 states have internal predecessors, (122), 0 states have call successors, (0), 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 122 [2022-11-19 08:02:11,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:02:11,969 INFO L225 Difference]: With dead ends: 13731 [2022-11-19 08:02:11,969 INFO L226 Difference]: Without dead ends: 8464 [2022-11-19 08:02:11,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-19 08:02:11,978 INFO L413 NwaCegarLoop]: 359 mSDtfsCounter, 1051 mSDsluCounter, 2763 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1051 SdHoareTripleChecker+Valid, 3122 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:02:11,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1051 Valid, 3122 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 08:02:11,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8464 states. [2022-11-19 08:02:12,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8464 to 8450. [2022-11-19 08:02:12,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8450 states, 8449 states have (on average 1.57758314593443) internal successors, (13329), 8449 states have internal predecessors, (13329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:02:12,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8450 states to 8450 states and 13329 transitions. [2022-11-19 08:02:12,994 INFO L78 Accepts]: Start accepts. Automaton has 8450 states and 13329 transitions. Word has length 122 [2022-11-19 08:02:12,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:02:12,994 INFO L495 AbstractCegarLoop]: Abstraction has 8450 states and 13329 transitions. [2022-11-19 08:02:12,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 6 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:02:12,995 INFO L276 IsEmpty]: Start isEmpty. Operand 8450 states and 13329 transitions. [2022-11-19 08:02:12,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-19 08:02:12,996 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:02:12,996 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:02:12,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-19 08:02:12,997 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:02:12,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:02:12,997 INFO L85 PathProgramCache]: Analyzing trace with hash 367218292, now seen corresponding path program 1 times [2022-11-19 08:02:12,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:02:12,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004123063] [2022-11-19 08:02:12,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:02:12,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:02:13,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:02:13,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:02:13,149 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:02:13,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004123063] [2022-11-19 08:02:13,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004123063] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:02:13,150 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:02:13,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:02:13,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308481315] [2022-11-19 08:02:13,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:02:13,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:02:13,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:02:13,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:02:13,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:02:13,152 INFO L87 Difference]: Start difference. First operand 8450 states and 13329 transitions. Second operand has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:02:14,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:02:14,172 INFO L93 Difference]: Finished difference Result 16682 states and 26340 transitions. [2022-11-19 08:02:14,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:02:14,174 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 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 [2022-11-19 08:02:14,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:02:14,217 INFO L225 Difference]: With dead ends: 16682 [2022-11-19 08:02:14,218 INFO L226 Difference]: Without dead ends: 8452 [2022-11-19 08:02:14,226 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 [2022-11-19 08:02:14,227 INFO L413 NwaCegarLoop]: 348 mSDtfsCounter, 256 mSDsluCounter, 661 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 1009 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:02:14,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [256 Valid, 1009 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:02:14,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8452 states. [2022-11-19 08:02:15,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8452 to 8450. [2022-11-19 08:02:15,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8450 states, 8449 states have (on average 1.5735590010652147) internal successors, (13295), 8449 states have internal predecessors, (13295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:02:15,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8450 states to 8450 states and 13295 transitions. [2022-11-19 08:02:15,140 INFO L78 Accepts]: Start accepts. Automaton has 8450 states and 13295 transitions. Word has length 123 [2022-11-19 08:02:15,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:02:15,140 INFO L495 AbstractCegarLoop]: Abstraction has 8450 states and 13295 transitions. [2022-11-19 08:02:15,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:02:15,141 INFO L276 IsEmpty]: Start isEmpty. Operand 8450 states and 13295 transitions. [2022-11-19 08:02:15,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-19 08:02:15,143 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:02:15,143 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:02:15,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-19 08:02:15,143 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:02:15,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:02:15,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1563638844, now seen corresponding path program 1 times [2022-11-19 08:02:15,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:02:15,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670038864] [2022-11-19 08:02:15,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:02:15,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:02:15,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:02:15,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:02:15,295 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:02:15,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670038864] [2022-11-19 08:02:15,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670038864] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:02:15,295 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:02:15,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:02:15,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088387376] [2022-11-19 08:02:15,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:02:15,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:02:15,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:02:15,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:02:15,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:02:15,298 INFO L87 Difference]: Start difference. First operand 8450 states and 13295 transitions. Second operand has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:02:16,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:02:16,572 INFO L93 Difference]: Finished difference Result 16682 states and 26272 transitions. [2022-11-19 08:02:16,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:02:16,573 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2022-11-19 08:02:16,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:02:16,600 INFO L225 Difference]: With dead ends: 16682 [2022-11-19 08:02:16,600 INFO L226 Difference]: Without dead ends: 8452 [2022-11-19 08:02:16,613 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 [2022-11-19 08:02:16,614 INFO L413 NwaCegarLoop]: 352 mSDtfsCounter, 264 mSDsluCounter, 663 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 1015 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:02:16,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 1015 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:02:16,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8452 states. [2022-11-19 08:02:17,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8452 to 8450. [2022-11-19 08:02:17,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8450 states, 8449 states have (on average 1.5695348561959994) internal successors, (13261), 8449 states have internal predecessors, (13261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:02:17,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8450 states to 8450 states and 13261 transitions. [2022-11-19 08:02:17,789 INFO L78 Accepts]: Start accepts. Automaton has 8450 states and 13261 transitions. Word has length 124 [2022-11-19 08:02:17,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:02:17,789 INFO L495 AbstractCegarLoop]: Abstraction has 8450 states and 13261 transitions. [2022-11-19 08:02:17,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:02:17,790 INFO L276 IsEmpty]: Start isEmpty. Operand 8450 states and 13261 transitions. [2022-11-19 08:02:17,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-19 08:02:17,791 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:02:17,791 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:02:17,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-19 08:02:17,792 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:02:17,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:02:17,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1286109893, now seen corresponding path program 1 times [2022-11-19 08:02:17,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:02:17,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441204690] [2022-11-19 08:02:17,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:02:17,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:02:17,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:02:17,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:02:17,955 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:02:17,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441204690] [2022-11-19 08:02:17,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441204690] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:02:17,955 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:02:17,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:02:17,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542771508] [2022-11-19 08:02:17,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:02:17,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:02:17,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:02:17,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:02:17,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:02:17,957 INFO L87 Difference]: Start difference. First operand 8450 states and 13261 transitions. Second operand has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:02:18,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:02:18,918 INFO L93 Difference]: Finished difference Result 16682 states and 26204 transitions. [2022-11-19 08:02:18,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:02:18,919 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 0 states have call successors, (0), 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 125 [2022-11-19 08:02:18,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:02:18,942 INFO L225 Difference]: With dead ends: 16682 [2022-11-19 08:02:18,942 INFO L226 Difference]: Without dead ends: 8452 [2022-11-19 08:02:18,955 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 [2022-11-19 08:02:18,956 INFO L413 NwaCegarLoop]: 353 mSDtfsCounter, 262 mSDsluCounter, 665 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 1018 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:02:18,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [262 Valid, 1018 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:02:18,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8452 states. [2022-11-19 08:02:19,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8452 to 8450. [2022-11-19 08:02:19,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8450 states, 8449 states have (on average 1.5655107113267843) internal successors, (13227), 8449 states have internal predecessors, (13227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:02:19,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8450 states to 8450 states and 13227 transitions. [2022-11-19 08:02:19,790 INFO L78 Accepts]: Start accepts. Automaton has 8450 states and 13227 transitions. Word has length 125 [2022-11-19 08:02:19,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:02:19,790 INFO L495 AbstractCegarLoop]: Abstraction has 8450 states and 13227 transitions. [2022-11-19 08:02:19,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:02:19,791 INFO L276 IsEmpty]: Start isEmpty. Operand 8450 states and 13227 transitions. [2022-11-19 08:02:19,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-11-19 08:02:19,792 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:02:19,793 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:02:19,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-19 08:02:19,793 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:02:19,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:02:19,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1268088981, now seen corresponding path program 1 times [2022-11-19 08:02:19,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:02:19,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679748731] [2022-11-19 08:02:19,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:02:19,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:02:19,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:02:19,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:02:19,913 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:02:19,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679748731] [2022-11-19 08:02:19,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679748731] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:02:19,913 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:02:19,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:02:19,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701006857] [2022-11-19 08:02:19,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:02:19,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:02:19,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:02:19,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:02:19,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:02:19,915 INFO L87 Difference]: Start difference. First operand 8450 states and 13227 transitions. Second operand has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:02:20,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:02:20,896 INFO L93 Difference]: Finished difference Result 16682 states and 26136 transitions. [2022-11-19 08:02:20,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:02:20,897 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 126 [2022-11-19 08:02:20,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:02:20,920 INFO L225 Difference]: With dead ends: 16682 [2022-11-19 08:02:20,921 INFO L226 Difference]: Without dead ends: 8452 [2022-11-19 08:02:20,931 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 [2022-11-19 08:02:20,932 INFO L413 NwaCegarLoop]: 354 mSDtfsCounter, 260 mSDsluCounter, 667 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 1021 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:02:20,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [260 Valid, 1021 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:02:20,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8452 states. [2022-11-19 08:02:21,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8452 to 8450. [2022-11-19 08:02:21,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8450 states, 8449 states have (on average 1.561486566457569) internal successors, (13193), 8449 states have internal predecessors, (13193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:02:21,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8450 states to 8450 states and 13193 transitions. [2022-11-19 08:02:21,718 INFO L78 Accepts]: Start accepts. Automaton has 8450 states and 13193 transitions. Word has length 126 [2022-11-19 08:02:21,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:02:21,718 INFO L495 AbstractCegarLoop]: Abstraction has 8450 states and 13193 transitions. [2022-11-19 08:02:21,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:02:21,719 INFO L276 IsEmpty]: Start isEmpty. Operand 8450 states and 13193 transitions. [2022-11-19 08:02:21,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-11-19 08:02:21,721 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:02:21,721 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:02:21,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-19 08:02:21,722 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:02:21,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:02:21,722 INFO L85 PathProgramCache]: Analyzing trace with hash -380104196, now seen corresponding path program 1 times [2022-11-19 08:02:21,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:02:21,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749951608] [2022-11-19 08:02:21,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:02:21,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:02:21,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:02:22,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:02:22,098 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:02:22,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749951608] [2022-11-19 08:02:22,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749951608] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:02:22,098 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:02:22,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 08:02:22,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607085403] [2022-11-19 08:02:22,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:02:22,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 08:02:22,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:02:22,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 08:02:22,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:02:22,101 INFO L87 Difference]: Start difference. First operand 8450 states and 13193 transitions. Second operand has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:02:23,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:02:23,562 INFO L93 Difference]: Finished difference Result 16682 states and 26068 transitions. [2022-11-19 08:02:23,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:02:23,562 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 128 [2022-11-19 08:02:23,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:02:23,590 INFO L225 Difference]: With dead ends: 16682 [2022-11-19 08:02:23,591 INFO L226 Difference]: Without dead ends: 8452 [2022-11-19 08:02:23,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-19 08:02:23,605 INFO L413 NwaCegarLoop]: 349 mSDtfsCounter, 553 mSDsluCounter, 972 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 553 SdHoareTripleChecker+Valid, 1321 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:02:23,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [553 Valid, 1321 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 08:02:23,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8452 states. [2022-11-19 08:02:24,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8452 to 8450. [2022-11-19 08:02:24,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8450 states, 8449 states have (on average 1.559592851224997) internal successors, (13177), 8449 states have internal predecessors, (13177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:02:24,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8450 states to 8450 states and 13177 transitions. [2022-11-19 08:02:24,629 INFO L78 Accepts]: Start accepts. Automaton has 8450 states and 13177 transitions. Word has length 128 [2022-11-19 08:02:24,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:02:24,629 INFO L495 AbstractCegarLoop]: Abstraction has 8450 states and 13177 transitions. [2022-11-19 08:02:24,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:02:24,630 INFO L276 IsEmpty]: Start isEmpty. Operand 8450 states and 13177 transitions. [2022-11-19 08:02:24,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-11-19 08:02:24,631 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:02:24,631 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:02:24,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-19 08:02:24,632 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:02:24,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:02:24,632 INFO L85 PathProgramCache]: Analyzing trace with hash 96287021, now seen corresponding path program 1 times [2022-11-19 08:02:24,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:02:24,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834531241] [2022-11-19 08:02:24,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:02:24,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:02:24,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:02:24,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:02:24,955 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:02:24,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834531241] [2022-11-19 08:02:24,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834531241] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:02:24,955 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:02:24,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 08:02:24,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209805423] [2022-11-19 08:02:24,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:02:24,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 08:02:24,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:02:24,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 08:02:24,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:02:24,957 INFO L87 Difference]: Start difference. First operand 8450 states and 13177 transitions. Second operand has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 6 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:02:26,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:02:26,361 INFO L93 Difference]: Finished difference Result 21010 states and 32666 transitions. [2022-11-19 08:02:26,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:02:26,362 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 6 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 131 [2022-11-19 08:02:26,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:02:26,392 INFO L225 Difference]: With dead ends: 21010 [2022-11-19 08:02:26,392 INFO L226 Difference]: Without dead ends: 12780 [2022-11-19 08:02:26,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-19 08:02:26,408 INFO L413 NwaCegarLoop]: 354 mSDtfsCounter, 441 mSDsluCounter, 996 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 441 SdHoareTripleChecker+Valid, 1350 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:02:26,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [441 Valid, 1350 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:02:26,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12780 states. [2022-11-19 08:02:27,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12780 to 12778. [2022-11-19 08:02:27,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12778 states, 12777 states have (on average 1.5483290287234874) internal successors, (19783), 12777 states have internal predecessors, (19783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:02:27,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12778 states to 12778 states and 19783 transitions. [2022-11-19 08:02:27,359 INFO L78 Accepts]: Start accepts. Automaton has 12778 states and 19783 transitions. Word has length 131 [2022-11-19 08:02:27,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:02:27,360 INFO L495 AbstractCegarLoop]: Abstraction has 12778 states and 19783 transitions. [2022-11-19 08:02:27,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 6 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:02:27,360 INFO L276 IsEmpty]: Start isEmpty. Operand 12778 states and 19783 transitions. [2022-11-19 08:02:27,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-11-19 08:02:27,362 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:02:27,362 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:02:27,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-19 08:02:27,362 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:02:27,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:02:27,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1280072598, now seen corresponding path program 1 times [2022-11-19 08:02:27,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:02:27,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214285763] [2022-11-19 08:02:27,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:02:27,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:02:27,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:02:27,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:02:27,965 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:02:27,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214285763] [2022-11-19 08:02:27,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214285763] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:02:27,967 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:02:27,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 08:02:27,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176691908] [2022-11-19 08:02:27,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:02:27,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 08:02:27,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:02:27,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 08:02:27,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:02:27,969 INFO L87 Difference]: Start difference. First operand 12778 states and 19783 transitions. Second operand has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:02:29,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:02:29,988 INFO L93 Difference]: Finished difference Result 15663 states and 24171 transitions. [2022-11-19 08:02:29,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 08:02:29,989 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 0 states have call successors, (0), 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 132 [2022-11-19 08:02:29,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:02:30,036 INFO L225 Difference]: With dead ends: 15663 [2022-11-19 08:02:30,036 INFO L226 Difference]: Without dead ends: 15661 [2022-11-19 08:02:30,040 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-19 08:02:30,041 INFO L413 NwaCegarLoop]: 571 mSDtfsCounter, 373 mSDsluCounter, 1300 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 1871 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:02:30,041 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [373 Valid, 1871 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:02:30,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15661 states. [2022-11-19 08:02:31,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15661 to 12792. [2022-11-19 08:02:31,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12792 states, 12791 states have (on average 1.5461652724571964) internal successors, (19777), 12791 states have internal predecessors, (19777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:02:31,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12792 states to 12792 states and 19777 transitions. [2022-11-19 08:02:31,893 INFO L78 Accepts]: Start accepts. Automaton has 12792 states and 19777 transitions. Word has length 132 [2022-11-19 08:02:31,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:02:31,893 INFO L495 AbstractCegarLoop]: Abstraction has 12792 states and 19777 transitions. [2022-11-19 08:02:31,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:02:31,893 INFO L276 IsEmpty]: Start isEmpty. Operand 12792 states and 19777 transitions. [2022-11-19 08:02:31,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-11-19 08:02:31,895 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:02:31,895 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:02:31,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-19 08:02:31,896 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:02:31,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:02:31,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1339109496, now seen corresponding path program 1 times [2022-11-19 08:02:31,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:02:31,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454236367] [2022-11-19 08:02:31,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:02:31,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:02:32,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:02:36,066 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 08:02:36,067 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:02:36,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454236367] [2022-11-19 08:02:36,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454236367] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:02:36,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936820443] [2022-11-19 08:02:36,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:02:36,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:02:36,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc8c1317-2294-444c-9d9f-3a337214e7a9/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:02:36,071 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc8c1317-2294-444c-9d9f-3a337214e7a9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:02:36,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc8c1317-2294-444c-9d9f-3a337214e7a9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 08:02:36,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:02:36,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 656 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 08:02:36,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:02:36,711 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-19 08:02:36,711 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:02:36,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936820443] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:02:36,712 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:02:36,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [13] total 15 [2022-11-19 08:02:36,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127110322] [2022-11-19 08:02:36,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:02:36,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:02:36,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:02:36,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:02:36,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-11-19 08:02:36,714 INFO L87 Difference]: Start difference. First operand 12792 states and 19777 transitions. Second operand has 4 states, 4 states have (on average 34.75) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:02:40,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:02:40,133 INFO L93 Difference]: Finished difference Result 37661 states and 58264 transitions. [2022-11-19 08:02:40,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:02:40,134 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 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 [2022-11-19 08:02:40,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:02:40,182 INFO L225 Difference]: With dead ends: 37661 [2022-11-19 08:02:40,183 INFO L226 Difference]: Without dead ends: 25087 [2022-11-19 08:02:40,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-11-19 08:02:40,198 INFO L413 NwaCegarLoop]: 406 mSDtfsCounter, 819 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 819 SdHoareTripleChecker+Valid, 747 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:02:40,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [819 Valid, 747 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:02:40,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25087 states. [2022-11-19 08:02:42,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25087 to 25085. [2022-11-19 08:02:42,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25085 states, 25084 states have (on average 1.5424174772763515) internal successors, (38690), 25084 states have internal predecessors, (38690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:02:42,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25085 states to 25085 states and 38690 transitions. [2022-11-19 08:02:42,614 INFO L78 Accepts]: Start accepts. Automaton has 25085 states and 38690 transitions. Word has length 141 [2022-11-19 08:02:42,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:02:42,615 INFO L495 AbstractCegarLoop]: Abstraction has 25085 states and 38690 transitions. [2022-11-19 08:02:42,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:02:42,615 INFO L276 IsEmpty]: Start isEmpty. Operand 25085 states and 38690 transitions. [2022-11-19 08:02:42,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-19 08:02:42,617 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:02:42,617 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:02:42,626 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc8c1317-2294-444c-9d9f-3a337214e7a9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-19 08:02:42,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc8c1317-2294-444c-9d9f-3a337214e7a9/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-19 08:02:42,826 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:02:42,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:02:42,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1095290833, now seen corresponding path program 1 times [2022-11-19 08:02:42,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:02:42,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450243901] [2022-11-19 08:02:42,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:02:42,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:02:42,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:02:42,944 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-19 08:02:42,944 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:02:42,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450243901] [2022-11-19 08:02:42,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450243901] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:02:42,945 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:02:42,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:02:42,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847615206] [2022-11-19 08:02:42,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:02:42,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:02:42,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:02:42,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:02:42,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:02:42,946 INFO L87 Difference]: Start difference. First operand 25085 states and 38690 transitions. Second operand has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:02:48,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:02:48,669 INFO L93 Difference]: Finished difference Result 73633 states and 113624 transitions. [2022-11-19 08:02:48,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:02:48,670 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2022-11-19 08:02:48,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:02:48,747 INFO L225 Difference]: With dead ends: 73633 [2022-11-19 08:02:48,747 INFO L226 Difference]: Without dead ends: 48636 [2022-11-19 08:02:48,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:02:48,770 INFO L413 NwaCegarLoop]: 647 mSDtfsCounter, 246 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 982 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:02:48,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 982 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:02:48,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48636 states. [2022-11-19 08:02:54,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48636 to 48634. [2022-11-19 08:02:54,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48634 states, 48633 states have (on average 1.5358707050767997) internal successors, (74694), 48633 states have internal predecessors, (74694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:02:54,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48634 states to 48634 states and 74694 transitions. [2022-11-19 08:02:54,555 INFO L78 Accepts]: Start accepts. Automaton has 48634 states and 74694 transitions. Word has length 143 [2022-11-19 08:02:54,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:02:54,555 INFO L495 AbstractCegarLoop]: Abstraction has 48634 states and 74694 transitions. [2022-11-19 08:02:54,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:02:54,556 INFO L276 IsEmpty]: Start isEmpty. Operand 48634 states and 74694 transitions. [2022-11-19 08:02:54,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-19 08:02:54,558 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:02:54,558 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:02:54,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-19 08:02:54,559 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:02:54,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:02:54,559 INFO L85 PathProgramCache]: Analyzing trace with hash -536929762, now seen corresponding path program 1 times [2022-11-19 08:02:54,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:02:54,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942715536] [2022-11-19 08:02:54,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:02:54,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:02:54,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:02:54,647 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-19 08:02:54,647 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:02:54,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942715536] [2022-11-19 08:02:54,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942715536] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:02:54,648 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:02:54,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:02:54,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119452934] [2022-11-19 08:02:54,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:02:54,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:02:54,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:02:54,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:02:54,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:02:54,650 INFO L87 Difference]: Start difference. First operand 48634 states and 74694 transitions. Second operand has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:03:06,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:03:06,671 INFO L93 Difference]: Finished difference Result 145809 states and 223932 transitions. [2022-11-19 08:03:06,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:03:06,672 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 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 143 [2022-11-19 08:03:06,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:03:06,840 INFO L225 Difference]: With dead ends: 145809 [2022-11-19 08:03:06,841 INFO L226 Difference]: Without dead ends: 97223 [2022-11-19 08:03:06,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:03:06,897 INFO L413 NwaCegarLoop]: 349 mSDtfsCounter, 319 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 690 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:03:06,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [319 Valid, 690 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 08:03:07,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97223 states.