./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.10.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 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_0ef6941f-f3da-46df-a81b-807e449b7a24/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ef6941f-f3da-46df-a81b-807e449b7a24/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ef6941f-f3da-46df-a81b-807e449b7a24/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ef6941f-f3da-46df-a81b-807e449b7a24/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.10.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ef6941f-f3da-46df-a81b-807e449b7a24/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ef6941f-f3da-46df-a81b-807e449b7a24/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f9db8f562e00e8e2c77bd4109a87025a2d9cfdc1d504bc43872dc3be0602b46a --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 06:56:54,794 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 06:56:54,796 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 06:56:54,808 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 06:56:54,808 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 06:56:54,809 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 06:56:54,810 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 06:56:54,811 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 06:56:54,812 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 06:56:54,812 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 06:56:54,813 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 06:56:54,814 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 06:56:54,814 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 06:56:54,814 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 06:56:54,815 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 06:56:54,816 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 06:56:54,816 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 06:56:54,817 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 06:56:54,818 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 06:56:54,819 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 06:56:54,820 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 06:56:54,821 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 06:56:54,822 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 06:56:54,822 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 06:56:54,824 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 06:56:54,825 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 06:56:54,825 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 06:56:54,825 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 06:56:54,826 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 06:56:54,826 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 06:56:54,826 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 06:56:54,827 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 06:56:54,827 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 06:56:54,828 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 06:56:54,828 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 06:56:54,829 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 06:56:54,829 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 06:56:54,829 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 06:56:54,829 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 06:56:54,830 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 06:56:54,830 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 06:56:54,831 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ef6941f-f3da-46df-a81b-807e449b7a24/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 06:56:54,845 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 06:56:54,846 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 06:56:54,846 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 06:56:54,846 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 06:56:54,846 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 06:56:54,847 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 06:56:54,847 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 06:56:54,847 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 06:56:54,847 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 06:56:54,847 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 06:56:54,847 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 06:56:54,847 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 06:56:54,847 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 06:56:54,848 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 06:56:54,848 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 06:56:54,848 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 06:56:54,848 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 06:56:54,848 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 06:56:54,849 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 06:56:54,849 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 06:56:54,849 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 06:56:54,849 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 06:56:54,849 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 06:56:54,849 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 06:56:54,849 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 06:56:54,849 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 06:56:54,850 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 06:56:54,850 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 06:56:54,850 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 06:56:54,850 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 06:56:54,850 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 06:56:54,850 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 06:56:54,850 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 06:56:54,850 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 06:56:54,850 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 06:56:54,850 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 06:56:54,851 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 06:56:54,851 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 06:56:54,851 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 06:56:54,851 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 06:56:54,851 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 06:56:54,851 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_0ef6941f-f3da-46df-a81b-807e449b7a24/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ef6941f-f3da-46df-a81b-807e449b7a24/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f9db8f562e00e8e2c77bd4109a87025a2d9cfdc1d504bc43872dc3be0602b46a [2022-12-14 06:56:55,033 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 06:56:55,051 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 06:56:55,054 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 06:56:55,055 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 06:56:55,055 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 06:56:55,057 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ef6941f-f3da-46df-a81b-807e449b7a24/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.10.cil-2.c [2022-12-14 06:56:57,625 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 06:56:57,801 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 06:56:57,802 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ef6941f-f3da-46df-a81b-807e449b7a24/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.10.cil-2.c [2022-12-14 06:56:57,811 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ef6941f-f3da-46df-a81b-807e449b7a24/bin/utaipan-gh47qXpMRh/data/ab7efdce0/b6c71a338dce42f4ae46a420e5e4f345/FLAG1025485ce [2022-12-14 06:56:57,821 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ef6941f-f3da-46df-a81b-807e449b7a24/bin/utaipan-gh47qXpMRh/data/ab7efdce0/b6c71a338dce42f4ae46a420e5e4f345 [2022-12-14 06:56:57,823 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 06:56:57,824 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 06:56:57,825 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 06:56:57,825 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 06:56:57,828 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 06:56:57,829 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 06:56:57" (1/1) ... [2022-12-14 06:56:57,830 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9bf7e82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:56:57, skipping insertion in model container [2022-12-14 06:56:57,830 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 06:56:57" (1/1) ... [2022-12-14 06:56:57,837 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 06:56:57,875 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 06:56:57,976 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ef6941f-f3da-46df-a81b-807e449b7a24/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.10.cil-2.c[911,924] [2022-12-14 06:56:58,019 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ef6941f-f3da-46df-a81b-807e449b7a24/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.10.cil-2.c[8416,8429] [2022-12-14 06:56:58,079 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 06:56:58,088 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 06:56:58,096 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ef6941f-f3da-46df-a81b-807e449b7a24/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.10.cil-2.c[911,924] [2022-12-14 06:56:58,110 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ef6941f-f3da-46df-a81b-807e449b7a24/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.10.cil-2.c[8416,8429] [2022-12-14 06:56:58,145 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 06:56:58,162 INFO L208 MainTranslator]: Completed translation [2022-12-14 06:56:58,162 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:56:58 WrapperNode [2022-12-14 06:56:58,162 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 06:56:58,163 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 06:56:58,163 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 06:56:58,163 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 06:56:58,168 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:56:58" (1/1) ... [2022-12-14 06:56:58,178 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:56:58" (1/1) ... [2022-12-14 06:56:58,212 INFO L138 Inliner]: procedures = 75, calls = 91, calls flagged for inlining = 44, calls inlined = 44, statements flattened = 962 [2022-12-14 06:56:58,212 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 06:56:58,212 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 06:56:58,213 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 06:56:58,213 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 06:56:58,220 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:56:58" (1/1) ... [2022-12-14 06:56:58,220 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:56:58" (1/1) ... [2022-12-14 06:56:58,223 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:56:58" (1/1) ... [2022-12-14 06:56:58,223 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:56:58" (1/1) ... [2022-12-14 06:56:58,232 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:56:58" (1/1) ... [2022-12-14 06:56:58,241 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:56:58" (1/1) ... [2022-12-14 06:56:58,244 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:56:58" (1/1) ... [2022-12-14 06:56:58,246 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:56:58" (1/1) ... [2022-12-14 06:56:58,250 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 06:56:58,250 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 06:56:58,251 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 06:56:58,251 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 06:56:58,251 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:56:58" (1/1) ... [2022-12-14 06:56:58,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 06:56:58,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ef6941f-f3da-46df-a81b-807e449b7a24/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:56:58,274 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ef6941f-f3da-46df-a81b-807e449b7a24/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 06:56:58,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ef6941f-f3da-46df-a81b-807e449b7a24/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 06:56:58,309 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 06:56:58,310 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-12-14 06:56:58,310 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-12-14 06:56:58,310 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2022-12-14 06:56:58,310 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2022-12-14 06:56:58,310 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-12-14 06:56:58,310 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-12-14 06:56:58,310 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-12-14 06:56:58,310 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-12-14 06:56:58,310 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2022-12-14 06:56:58,310 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2022-12-14 06:56:58,310 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-12-14 06:56:58,310 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-12-14 06:56:58,311 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-12-14 06:56:58,311 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-12-14 06:56:58,311 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2022-12-14 06:56:58,311 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2022-12-14 06:56:58,311 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2022-12-14 06:56:58,311 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2022-12-14 06:56:58,311 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2022-12-14 06:56:58,311 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2022-12-14 06:56:58,311 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-12-14 06:56:58,311 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-12-14 06:56:58,311 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 06:56:58,312 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-12-14 06:56:58,312 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-12-14 06:56:58,312 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2022-12-14 06:56:58,312 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2022-12-14 06:56:58,312 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 06:56:58,312 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 06:56:58,312 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-12-14 06:56:58,312 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-12-14 06:56:58,412 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 06:56:58,413 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 06:56:58,936 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##56: assume !(1 == ~q_free~0); [2022-12-14 06:56:58,936 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##55: assume 1 == ~q_free~0;~c_dr_st~0 := 2;~c_dr_pc~0 := 2;~a_t~0 := do_read_c_~a~0#1; [2022-12-14 06:56:58,995 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 06:56:59,379 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 06:56:59,379 INFO L300 CfgBuilder]: Removed 17 assume(true) statements. [2022-12-14 06:56:59,382 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 06:56:59 BoogieIcfgContainer [2022-12-14 06:56:59,382 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 06:56:59,385 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 06:56:59,385 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 06:56:59,388 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 06:56:59,388 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 06:56:57" (1/3) ... [2022-12-14 06:56:59,389 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48990be5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 06:56:59, skipping insertion in model container [2022-12-14 06:56:59,389 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:56:58" (2/3) ... [2022-12-14 06:56:59,389 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48990be5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 06:56:59, skipping insertion in model container [2022-12-14 06:56:59,389 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 06:56:59" (3/3) ... [2022-12-14 06:56:59,391 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_3.cil+token_ring.10.cil-2.c [2022-12-14 06:56:59,410 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 06:56:59,410 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-12-14 06:56:59,463 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 06:56:59,469 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;@5aa371c3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 06:56:59,469 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-14 06:56:59,474 INFO L276 IsEmpty]: Start isEmpty. Operand has 245 states, 188 states have (on average 1.5372340425531914) internal successors, (289), 194 states have internal predecessors, (289), 40 states have call successors, (40), 14 states have call predecessors, (40), 14 states have return successors, (40), 39 states have call predecessors, (40), 40 states have call successors, (40) [2022-12-14 06:56:59,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-12-14 06:56:59,484 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:56:59,484 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] [2022-12-14 06:56:59,485 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:56:59,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:56:59,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1396256936, now seen corresponding path program 1 times [2022-12-14 06:56:59,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:56:59,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230119929] [2022-12-14 06:56:59,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:56:59,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:56:59,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:56:59,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:56:59,722 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:56:59,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230119929] [2022-12-14 06:56:59,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230119929] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:56:59,723 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:56:59,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 06:56:59,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330753720] [2022-12-14 06:56:59,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:56:59,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 06:56:59,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:56:59,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 06:56:59,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 06:56:59,750 INFO L87 Difference]: Start difference. First operand has 245 states, 188 states have (on average 1.5372340425531914) internal successors, (289), 194 states have internal predecessors, (289), 40 states have call successors, (40), 14 states have call predecessors, (40), 14 states have return successors, (40), 39 states have call predecessors, (40), 40 states have call successors, (40) Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-14 06:57:00,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:57:00,100 INFO L93 Difference]: Finished difference Result 613 states and 916 transitions. [2022-12-14 06:57:00,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 06:57:00,102 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 44 [2022-12-14 06:57:00,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:57:00,110 INFO L225 Difference]: With dead ends: 613 [2022-12-14 06:57:00,110 INFO L226 Difference]: Without dead ends: 369 [2022-12-14 06:57:00,113 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 06:57:00,116 INFO L413 NwaCegarLoop]: 366 mSDtfsCounter, 421 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 421 SdHoareTripleChecker+Valid, 650 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 06:57:00,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [421 Valid, 650 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 06:57:00,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2022-12-14 06:57:00,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 358. [2022-12-14 06:57:00,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 269 states have (on average 1.446096654275093) internal successors, (389), 273 states have internal predecessors, (389), 60 states have call successors, (60), 28 states have call predecessors, (60), 27 states have return successors, (61), 58 states have call predecessors, (61), 58 states have call successors, (61) [2022-12-14 06:57:00,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 510 transitions. [2022-12-14 06:57:00,167 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 510 transitions. Word has length 44 [2022-12-14 06:57:00,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:57:00,167 INFO L495 AbstractCegarLoop]: Abstraction has 358 states and 510 transitions. [2022-12-14 06:57:00,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-14 06:57:00,167 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 510 transitions. [2022-12-14 06:57:00,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-12-14 06:57:00,169 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:57:00,169 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] [2022-12-14 06:57:00,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 06:57:00,169 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:57:00,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:57:00,170 INFO L85 PathProgramCache]: Analyzing trace with hash -1354046414, now seen corresponding path program 1 times [2022-12-14 06:57:00,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:57:00,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026795074] [2022-12-14 06:57:00,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:57:00,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:57:00,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:57:00,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:57:00,255 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:57:00,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026795074] [2022-12-14 06:57:00,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026795074] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:57:00,255 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:57:00,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 06:57:00,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492871389] [2022-12-14 06:57:00,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:57:00,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 06:57:00,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:57:00,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 06:57:00,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:57:00,258 INFO L87 Difference]: Start difference. First operand 358 states and 510 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-14 06:57:00,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:57:00,900 INFO L93 Difference]: Finished difference Result 895 states and 1233 transitions. [2022-12-14 06:57:00,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 06:57:00,901 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2022-12-14 06:57:00,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:57:00,904 INFO L225 Difference]: With dead ends: 895 [2022-12-14 06:57:00,904 INFO L226 Difference]: Without dead ends: 429 [2022-12-14 06:57:00,907 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-12-14 06:57:00,908 INFO L413 NwaCegarLoop]: 438 mSDtfsCounter, 910 mSDsluCounter, 682 mSDsCounter, 0 mSdLazyCounter, 784 mSolverCounterSat, 288 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 918 SdHoareTripleChecker+Valid, 1120 SdHoareTripleChecker+Invalid, 1072 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 288 IncrementalHoareTripleChecker+Valid, 784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 06:57:00,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [918 Valid, 1120 Invalid, 1072 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [288 Valid, 784 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 06:57:00,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2022-12-14 06:57:00,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 344. [2022-12-14 06:57:00,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 255 states have (on average 1.396078431372549) internal successors, (356), 259 states have internal predecessors, (356), 60 states have call successors, (60), 28 states have call predecessors, (60), 27 states have return successors, (58), 58 states have call predecessors, (58), 58 states have call successors, (58) [2022-12-14 06:57:00,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 474 transitions. [2022-12-14 06:57:00,942 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 474 transitions. Word has length 45 [2022-12-14 06:57:00,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:57:00,942 INFO L495 AbstractCegarLoop]: Abstraction has 344 states and 474 transitions. [2022-12-14 06:57:00,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-14 06:57:00,942 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 474 transitions. [2022-12-14 06:57:00,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-12-14 06:57:00,944 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:57:00,944 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] [2022-12-14 06:57:00,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 06:57:00,944 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:57:00,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:57:00,945 INFO L85 PathProgramCache]: Analyzing trace with hash 315922862, now seen corresponding path program 1 times [2022-12-14 06:57:00,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:57:00,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931555862] [2022-12-14 06:57:00,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:57:00,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:57:00,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:57:01,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:57:01,178 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:57:01,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931555862] [2022-12-14 06:57:01,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931555862] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:57:01,179 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:57:01,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 06:57:01,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520988395] [2022-12-14 06:57:01,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:57:01,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 06:57:01,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:57:01,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 06:57:01,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-12-14 06:57:01,181 INFO L87 Difference]: Start difference. First operand 344 states and 474 transitions. Second operand has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-12-14 06:57:01,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:57:01,784 INFO L93 Difference]: Finished difference Result 646 states and 842 transitions. [2022-12-14 06:57:01,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 06:57:01,785 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2022-12-14 06:57:01,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:57:01,789 INFO L225 Difference]: With dead ends: 646 [2022-12-14 06:57:01,789 INFO L226 Difference]: Without dead ends: 472 [2022-12-14 06:57:01,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-12-14 06:57:01,791 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 506 mSDsluCounter, 680 mSDsCounter, 0 mSdLazyCounter, 994 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 537 SdHoareTripleChecker+Valid, 875 SdHoareTripleChecker+Invalid, 1104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 994 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 06:57:01,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [537 Valid, 875 Invalid, 1104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 994 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 06:57:01,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2022-12-14 06:57:01,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 446. [2022-12-14 06:57:01,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 323 states have (on average 1.3560371517027863) internal successors, (438), 327 states have internal predecessors, (438), 80 states have call successors, (80), 42 states have call predecessors, (80), 41 states have return successors, (78), 78 states have call predecessors, (78), 78 states have call successors, (78) [2022-12-14 06:57:01,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 596 transitions. [2022-12-14 06:57:01,816 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 596 transitions. Word has length 46 [2022-12-14 06:57:01,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:57:01,816 INFO L495 AbstractCegarLoop]: Abstraction has 446 states and 596 transitions. [2022-12-14 06:57:01,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-12-14 06:57:01,816 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 596 transitions. [2022-12-14 06:57:01,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-12-14 06:57:01,823 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:57:01,823 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] [2022-12-14 06:57:01,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 06:57:01,824 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:57:01,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:57:01,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1173107423, now seen corresponding path program 1 times [2022-12-14 06:57:01,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:57:01,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498348178] [2022-12-14 06:57:01,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:57:01,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:57:01,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:57:01,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:57:01,861 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:57:01,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498348178] [2022-12-14 06:57:01,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498348178] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:57:01,861 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:57:01,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:57:01,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364975287] [2022-12-14 06:57:01,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:57:01,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:57:01,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:57:01,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:57:01,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:57:01,863 INFO L87 Difference]: Start difference. First operand 446 states and 596 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 06:57:01,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:57:01,959 INFO L93 Difference]: Finished difference Result 711 states and 932 transitions. [2022-12-14 06:57:01,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:57:01,959 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2022-12-14 06:57:01,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:57:01,961 INFO L225 Difference]: With dead ends: 711 [2022-12-14 06:57:01,961 INFO L226 Difference]: Without dead ends: 165 [2022-12-14 06:57:01,962 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 [2022-12-14 06:57:01,963 INFO L413 NwaCegarLoop]: 278 mSDtfsCounter, 321 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:57:01,963 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [321 Valid, 278 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:57:01,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-12-14 06:57:01,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2022-12-14 06:57:01,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 134 states have (on average 1.5149253731343284) internal successors, (203), 135 states have internal predecessors, (203), 24 states have call successors, (24), 6 states have call predecessors, (24), 6 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-12-14 06:57:01,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 251 transitions. [2022-12-14 06:57:01,971 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 251 transitions. Word has length 47 [2022-12-14 06:57:01,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:57:01,971 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 251 transitions. [2022-12-14 06:57:01,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 06:57:01,972 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 251 transitions. [2022-12-14 06:57:01,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-12-14 06:57:01,973 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:57:01,973 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] [2022-12-14 06:57:01,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 06:57:01,973 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:57:01,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:57:01,973 INFO L85 PathProgramCache]: Analyzing trace with hash -221396481, now seen corresponding path program 1 times [2022-12-14 06:57:01,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:57:01,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432883358] [2022-12-14 06:57:01,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:57:01,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:57:01,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:57:02,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:57:02,063 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:57:02,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432883358] [2022-12-14 06:57:02,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432883358] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:57:02,063 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:57:02,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 06:57:02,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099661227] [2022-12-14 06:57:02,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:57:02,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 06:57:02,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:57:02,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 06:57:02,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:57:02,065 INFO L87 Difference]: Start difference. First operand 165 states and 251 transitions. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 06:57:02,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:57:02,676 INFO L93 Difference]: Finished difference Result 933 states and 1516 transitions. [2022-12-14 06:57:02,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 06:57:02,677 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 61 [2022-12-14 06:57:02,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:57:02,680 INFO L225 Difference]: With dead ends: 933 [2022-12-14 06:57:02,680 INFO L226 Difference]: Without dead ends: 774 [2022-12-14 06:57:02,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 06:57:02,682 INFO L413 NwaCegarLoop]: 466 mSDtfsCounter, 1141 mSDsluCounter, 675 mSDsCounter, 0 mSdLazyCounter, 539 mSolverCounterSat, 224 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1156 SdHoareTripleChecker+Valid, 1141 SdHoareTripleChecker+Invalid, 763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 224 IncrementalHoareTripleChecker+Valid, 539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 06:57:02,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1156 Valid, 1141 Invalid, 763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [224 Valid, 539 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 06:57:02,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2022-12-14 06:57:02,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 763. [2022-12-14 06:57:02,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 763 states, 631 states have (on average 1.5166402535657686) internal successors, (957), 635 states have internal predecessors, (957), 101 states have call successors, (101), 30 states have call predecessors, (101), 30 states have return successors, (155), 98 states have call predecessors, (155), 101 states have call successors, (155) [2022-12-14 06:57:02,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 763 states to 763 states and 1213 transitions. [2022-12-14 06:57:02,722 INFO L78 Accepts]: Start accepts. Automaton has 763 states and 1213 transitions. Word has length 61 [2022-12-14 06:57:02,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:57:02,722 INFO L495 AbstractCegarLoop]: Abstraction has 763 states and 1213 transitions. [2022-12-14 06:57:02,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 06:57:02,723 INFO L276 IsEmpty]: Start isEmpty. Operand 763 states and 1213 transitions. [2022-12-14 06:57:02,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-12-14 06:57:02,726 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:57:02,726 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:57:02,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 06:57:02,726 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:57:02,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:57:02,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1296056583, now seen corresponding path program 1 times [2022-12-14 06:57:02,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:57:02,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081094567] [2022-12-14 06:57:02,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:57:02,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:57:02,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:57:02,852 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 06:57:02,853 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:57:02,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081094567] [2022-12-14 06:57:02,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081094567] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:57:02,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476939017] [2022-12-14 06:57:02,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:57:02,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:57:02,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ef6941f-f3da-46df-a81b-807e449b7a24/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:57:02,854 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ef6941f-f3da-46df-a81b-807e449b7a24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:57:02,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ef6941f-f3da-46df-a81b-807e449b7a24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 06:57:02,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:57:03,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 918 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 06:57:03,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:57:03,051 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 06:57:03,051 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:57:03,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476939017] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:57:03,051 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:57:03,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 06:57:03,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067366541] [2022-12-14 06:57:03,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:57:03,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:57:03,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:57:03,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:57:03,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:57:03,053 INFO L87 Difference]: Start difference. First operand 763 states and 1213 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 06:57:03,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:57:03,220 INFO L93 Difference]: Finished difference Result 2261 states and 3703 transitions. [2022-12-14 06:57:03,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:57:03,221 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 122 [2022-12-14 06:57:03,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:57:03,228 INFO L225 Difference]: With dead ends: 2261 [2022-12-14 06:57:03,228 INFO L226 Difference]: Without dead ends: 1504 [2022-12-14 06:57:03,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:57:03,232 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 223 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:57:03,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 420 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:57:03,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1504 states. [2022-12-14 06:57:03,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1504 to 1497. [2022-12-14 06:57:03,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1497 states, 1243 states have (on average 1.5124698310539018) internal successors, (1880), 1250 states have internal predecessors, (1880), 193 states have call successors, (193), 60 states have call predecessors, (193), 60 states have return successors, (297), 187 states have call predecessors, (297), 193 states have call successors, (297) [2022-12-14 06:57:03,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1497 states to 1497 states and 2370 transitions. [2022-12-14 06:57:03,329 INFO L78 Accepts]: Start accepts. Automaton has 1497 states and 2370 transitions. Word has length 122 [2022-12-14 06:57:03,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:57:03,330 INFO L495 AbstractCegarLoop]: Abstraction has 1497 states and 2370 transitions. [2022-12-14 06:57:03,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 06:57:03,330 INFO L276 IsEmpty]: Start isEmpty. Operand 1497 states and 2370 transitions. [2022-12-14 06:57:03,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-12-14 06:57:03,334 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:57:03,334 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:57:03,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ef6941f-f3da-46df-a81b-807e449b7a24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 06:57:03,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ef6941f-f3da-46df-a81b-807e449b7a24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-14 06:57:03,534 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:57:03,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:57:03,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1625209703, now seen corresponding path program 1 times [2022-12-14 06:57:03,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:57:03,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239476970] [2022-12-14 06:57:03,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:57:03,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:57:03,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:57:03,695 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 06:57:03,696 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:57:03,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239476970] [2022-12-14 06:57:03,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239476970] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:57:03,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218709782] [2022-12-14 06:57:03,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:57:03,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:57:03,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ef6941f-f3da-46df-a81b-807e449b7a24/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:57:03,697 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ef6941f-f3da-46df-a81b-807e449b7a24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:57:03,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ef6941f-f3da-46df-a81b-807e449b7a24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 06:57:03,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:57:03,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 912 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 06:57:03,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:57:03,894 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 06:57:03,894 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:57:03,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218709782] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:57:03,895 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:57:03,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 06:57:03,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173763297] [2022-12-14 06:57:03,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:57:03,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:57:03,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:57:03,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:57:03,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:57:03,896 INFO L87 Difference]: Start difference. First operand 1497 states and 2370 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 06:57:04,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:57:04,169 INFO L93 Difference]: Finished difference Result 4448 states and 7248 transitions. [2022-12-14 06:57:04,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:57:04,170 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 122 [2022-12-14 06:57:04,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:57:04,182 INFO L225 Difference]: With dead ends: 4448 [2022-12-14 06:57:04,182 INFO L226 Difference]: Without dead ends: 2957 [2022-12-14 06:57:04,187 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:57:04,188 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 214 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:57:04,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 420 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:57:04,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2957 states. [2022-12-14 06:57:04,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2957 to 2945. [2022-12-14 06:57:04,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2945 states, 2452 states have (on average 1.5073409461663947) internal successors, (3696), 2465 states have internal predecessors, (3696), 372 states have call successors, (372), 120 states have call predecessors, (372), 120 states have return successors, (572), 360 states have call predecessors, (572), 372 states have call successors, (572) [2022-12-14 06:57:04,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2945 states to 2945 states and 4640 transitions. [2022-12-14 06:57:04,330 INFO L78 Accepts]: Start accepts. Automaton has 2945 states and 4640 transitions. Word has length 122 [2022-12-14 06:57:04,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:57:04,330 INFO L495 AbstractCegarLoop]: Abstraction has 2945 states and 4640 transitions. [2022-12-14 06:57:04,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 06:57:04,330 INFO L276 IsEmpty]: Start isEmpty. Operand 2945 states and 4640 transitions. [2022-12-14 06:57:04,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-12-14 06:57:04,335 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:57:04,335 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:57:04,342 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ef6941f-f3da-46df-a81b-807e449b7a24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 06:57:04,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ef6941f-f3da-46df-a81b-807e449b7a24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:57:04,536 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:57:04,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:57:04,537 INFO L85 PathProgramCache]: Analyzing trace with hash 586880263, now seen corresponding path program 1 times [2022-12-14 06:57:04,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:57:04,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232650939] [2022-12-14 06:57:04,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:57:04,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:57:04,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:57:04,690 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 06:57:04,690 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:57:04,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232650939] [2022-12-14 06:57:04,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232650939] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:57:04,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100105229] [2022-12-14 06:57:04,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:57:04,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:57:04,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ef6941f-f3da-46df-a81b-807e449b7a24/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:57:04,691 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ef6941f-f3da-46df-a81b-807e449b7a24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:57:04,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ef6941f-f3da-46df-a81b-807e449b7a24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 06:57:04,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:57:04,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 906 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 06:57:04,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:57:04,872 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 06:57:04,872 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:57:04,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100105229] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:57:04,872 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:57:04,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 06:57:04,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821926058] [2022-12-14 06:57:04,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:57:04,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:57:04,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:57:04,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:57:04,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:57:04,874 INFO L87 Difference]: Start difference. First operand 2945 states and 4640 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 06:57:05,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:57:05,218 INFO L93 Difference]: Finished difference Result 8762 states and 14197 transitions. [2022-12-14 06:57:05,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:57:05,219 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 122 [2022-12-14 06:57:05,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:57:05,241 INFO L225 Difference]: With dead ends: 8762 [2022-12-14 06:57:05,242 INFO L226 Difference]: Without dead ends: 5823 [2022-12-14 06:57:05,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:57:05,254 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 220 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:57:05,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 420 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:57:05,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5823 states. [2022-12-14 06:57:05,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5823 to 5801. [2022-12-14 06:57:05,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5801 states, 4840 states have (on average 1.5016528925619834) internal successors, (7268), 4865 states have internal predecessors, (7268), 720 states have call successors, (720), 240 states have call predecessors, (720), 240 states have return successors, (1104), 696 states have call predecessors, (1104), 720 states have call successors, (1104) [2022-12-14 06:57:05,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5801 states to 5801 states and 9092 transitions. [2022-12-14 06:57:05,580 INFO L78 Accepts]: Start accepts. Automaton has 5801 states and 9092 transitions. Word has length 122 [2022-12-14 06:57:05,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:57:05,581 INFO L495 AbstractCegarLoop]: Abstraction has 5801 states and 9092 transitions. [2022-12-14 06:57:05,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 06:57:05,581 INFO L276 IsEmpty]: Start isEmpty. Operand 5801 states and 9092 transitions. [2022-12-14 06:57:05,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-12-14 06:57:05,588 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:57:05,588 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:57:05,596 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ef6941f-f3da-46df-a81b-807e449b7a24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 06:57:05,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ef6941f-f3da-46df-a81b-807e449b7a24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-12-14 06:57:05,789 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:57:05,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:57:05,789 INFO L85 PathProgramCache]: Analyzing trace with hash -90851673, now seen corresponding path program 1 times [2022-12-14 06:57:05,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:57:05,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157581970] [2022-12-14 06:57:05,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:57:05,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:57:05,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:57:05,877 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 06:57:05,877 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:57:05,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157581970] [2022-12-14 06:57:05,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157581970] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:57:05,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189310013] [2022-12-14 06:57:05,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:57:05,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:57:05,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ef6941f-f3da-46df-a81b-807e449b7a24/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:57:05,879 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ef6941f-f3da-46df-a81b-807e449b7a24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:57:05,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ef6941f-f3da-46df-a81b-807e449b7a24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 06:57:06,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:57:06,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 900 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 06:57:06,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:57:06,104 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 06:57:06,105 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:57:06,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189310013] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:57:06,105 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:57:06,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 06:57:06,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100545350] [2022-12-14 06:57:06,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:57:06,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:57:06,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:57:06,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:57:06,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:57:06,107 INFO L87 Difference]: Start difference. First operand 5801 states and 9092 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 06:57:06,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:57:06,714 INFO L93 Difference]: Finished difference Result 17270 states and 27813 transitions. [2022-12-14 06:57:06,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:57:06,715 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 122 [2022-12-14 06:57:06,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:57:06,766 INFO L225 Difference]: With dead ends: 17270 [2022-12-14 06:57:06,767 INFO L226 Difference]: Without dead ends: 11475 [2022-12-14 06:57:06,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:57:06,783 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 202 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:57:06,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 420 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:57:06,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11475 states. [2022-12-14 06:57:07,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11475 to 11433. [2022-12-14 06:57:07,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11433 states, 9556 states have (on average 1.495604855588112) internal successors, (14292), 9605 states have internal predecessors, (14292), 1396 states have call successors, (1396), 480 states have call predecessors, (1396), 480 states have return successors, (2132), 1348 states have call predecessors, (2132), 1396 states have call successors, (2132) [2022-12-14 06:57:07,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11433 states to 11433 states and 17820 transitions. [2022-12-14 06:57:07,419 INFO L78 Accepts]: Start accepts. Automaton has 11433 states and 17820 transitions. Word has length 122 [2022-12-14 06:57:07,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:57:07,420 INFO L495 AbstractCegarLoop]: Abstraction has 11433 states and 17820 transitions. [2022-12-14 06:57:07,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 06:57:07,420 INFO L276 IsEmpty]: Start isEmpty. Operand 11433 states and 17820 transitions. [2022-12-14 06:57:07,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-12-14 06:57:07,437 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:57:07,437 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:57:07,443 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ef6941f-f3da-46df-a81b-807e449b7a24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 06:57:07,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ef6941f-f3da-46df-a81b-807e449b7a24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:57:07,638 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:57:07,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:57:07,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1311998023, now seen corresponding path program 1 times [2022-12-14 06:57:07,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:57:07,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107184398] [2022-12-14 06:57:07,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:57:07,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:57:07,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:57:07,809 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 06:57:07,809 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:57:07,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107184398] [2022-12-14 06:57:07,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107184398] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:57:07,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953580200] [2022-12-14 06:57:07,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:57:07,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:57:07,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ef6941f-f3da-46df-a81b-807e449b7a24/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:57:07,811 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ef6941f-f3da-46df-a81b-807e449b7a24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:57:07,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ef6941f-f3da-46df-a81b-807e449b7a24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 06:57:07,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:57:07,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 894 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 06:57:07,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:57:07,976 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 06:57:07,977 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:57:07,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953580200] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:57:07,977 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:57:07,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 06:57:07,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759334132] [2022-12-14 06:57:07,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:57:07,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:57:07,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:57:07,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:57:07,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:57:07,978 INFO L87 Difference]: Start difference. First operand 11433 states and 17820 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 06:57:09,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:57:09,219 INFO L93 Difference]: Finished difference Result 34046 states and 54481 transitions. [2022-12-14 06:57:09,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:57:09,219 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 122 [2022-12-14 06:57:09,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:57:09,301 INFO L225 Difference]: With dead ends: 34046 [2022-12-14 06:57:09,301 INFO L226 Difference]: Without dead ends: 22619 [2022-12-14 06:57:09,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:57:09,333 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 208 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:57:09,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 420 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:57:09,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22619 states. [2022-12-14 06:57:10,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22619 to 22537. [2022-12-14 06:57:10,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22537 states, 18868 states have (on average 1.4892940428238286) internal successors, (28100), 18965 states have internal predecessors, (28100), 2708 states have call successors, (2708), 960 states have call predecessors, (2708), 960 states have return successors, (4116), 2612 states have call predecessors, (4116), 2708 states have call successors, (4116) [2022-12-14 06:57:10,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22537 states to 22537 states and 34924 transitions. [2022-12-14 06:57:10,646 INFO L78 Accepts]: Start accepts. Automaton has 22537 states and 34924 transitions. Word has length 122 [2022-12-14 06:57:10,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:57:10,646 INFO L495 AbstractCegarLoop]: Abstraction has 22537 states and 34924 transitions. [2022-12-14 06:57:10,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 06:57:10,647 INFO L276 IsEmpty]: Start isEmpty. Operand 22537 states and 34924 transitions. [2022-12-14 06:57:10,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-12-14 06:57:10,672 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:57:10,672 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:57:10,677 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ef6941f-f3da-46df-a81b-807e449b7a24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 06:57:10,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ef6941f-f3da-46df-a81b-807e449b7a24/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-14 06:57:10,873 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:57:10,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:57:10,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1938058777, now seen corresponding path program 1 times [2022-12-14 06:57:10,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:57:10,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709335959] [2022-12-14 06:57:10,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:57:10,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:57:10,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:57:11,191 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 06:57:11,191 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:57:11,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709335959] [2022-12-14 06:57:11,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709335959] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:57:11,191 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:57:11,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 06:57:11,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28994646] [2022-12-14 06:57:11,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:57:11,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 06:57:11,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:57:11,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 06:57:11,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:57:11,193 INFO L87 Difference]: Start difference. First operand 22537 states and 34924 transitions. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 06:57:13,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:57:13,266 INFO L93 Difference]: Finished difference Result 62893 states and 98398 transitions. [2022-12-14 06:57:13,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 06:57:13,267 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 122 [2022-12-14 06:57:13,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:57:13,413 INFO L225 Difference]: With dead ends: 62893 [2022-12-14 06:57:13,413 INFO L226 Difference]: Without dead ends: 40363 [2022-12-14 06:57:13,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 06:57:13,465 INFO L413 NwaCegarLoop]: 243 mSDtfsCounter, 839 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 846 SdHoareTripleChecker+Valid, 710 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 06:57:13,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [846 Valid, 710 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 06:57:13,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40363 states. [2022-12-14 06:57:15,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40363 to 35689. [2022-12-14 06:57:15,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35689 states, 29860 states have (on average 1.4822505023442734) internal successors, (44260), 30021 states have internal predecessors, (44260), 4292 states have call successors, (4292), 1536 states have call predecessors, (4292), 1536 states have return successors, (6708), 4132 states have call predecessors, (6708), 4292 states have call successors, (6708) [2022-12-14 06:57:15,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35689 states to 35689 states and 55260 transitions. [2022-12-14 06:57:15,719 INFO L78 Accepts]: Start accepts. Automaton has 35689 states and 55260 transitions. Word has length 122 [2022-12-14 06:57:15,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:57:15,719 INFO L495 AbstractCegarLoop]: Abstraction has 35689 states and 55260 transitions. [2022-12-14 06:57:15,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 06:57:15,720 INFO L276 IsEmpty]: Start isEmpty. Operand 35689 states and 55260 transitions. [2022-12-14 06:57:15,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-12-14 06:57:15,746 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:57:15,746 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:57:15,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 06:57:15,746 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:57:15,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:57:15,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1805620238, now seen corresponding path program 1 times [2022-12-14 06:57:15,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:57:15,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027406672] [2022-12-14 06:57:15,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:57:15,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:57:15,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:57:16,001 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 06:57:16,001 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:57:16,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027406672] [2022-12-14 06:57:16,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027406672] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:57:16,002 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:57:16,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 06:57:16,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967164169] [2022-12-14 06:57:16,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:57:16,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 06:57:16,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:57:16,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 06:57:16,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:57:16,003 INFO L87 Difference]: Start difference. First operand 35689 states and 55260 transitions. Second operand has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 06:57:20,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:57:20,988 INFO L93 Difference]: Finished difference Result 122157 states and 191087 transitions. [2022-12-14 06:57:20,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 06:57:20,989 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 123 [2022-12-14 06:57:20,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:57:21,283 INFO L225 Difference]: With dead ends: 122157 [2022-12-14 06:57:21,283 INFO L226 Difference]: Without dead ends: 86475 [2022-12-14 06:57:21,375 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 06:57:21,376 INFO L413 NwaCegarLoop]: 227 mSDtfsCounter, 868 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 887 SdHoareTripleChecker+Valid, 733 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 06:57:21,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [887 Valid, 733 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 06:57:21,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86475 states. [2022-12-14 06:57:25,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86475 to 69833. [2022-12-14 06:57:25,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69833 states, 58436 states have (on average 1.4753234307618592) internal successors, (86212), 58757 states have internal predecessors, (86212), 8324 states have call successors, (8324), 3072 states have call predecessors, (8324), 3072 states have return successors, (12932), 8004 states have call predecessors, (12932), 8324 states have call successors, (12932) [2022-12-14 06:57:25,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69833 states to 69833 states and 107468 transitions. [2022-12-14 06:57:25,862 INFO L78 Accepts]: Start accepts. Automaton has 69833 states and 107468 transitions. Word has length 123 [2022-12-14 06:57:25,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:57:25,863 INFO L495 AbstractCegarLoop]: Abstraction has 69833 states and 107468 transitions. [2022-12-14 06:57:25,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 06:57:25,863 INFO L276 IsEmpty]: Start isEmpty. Operand 69833 states and 107468 transitions. [2022-12-14 06:57:25,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-12-14 06:57:25,919 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:57:25,920 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:57:25,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-14 06:57:25,920 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:57:25,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:57:25,920 INFO L85 PathProgramCache]: Analyzing trace with hash 340839619, now seen corresponding path program 1 times [2022-12-14 06:57:25,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:57:25,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960143134] [2022-12-14 06:57:25,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:57:25,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:57:25,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:57:26,306 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 06:57:26,307 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:57:26,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960143134] [2022-12-14 06:57:26,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960143134] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:57:26,307 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:57:26,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 06:57:26,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481435716] [2022-12-14 06:57:26,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:57:26,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 06:57:26,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:57:26,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 06:57:26,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:57:26,309 INFO L87 Difference]: Start difference. First operand 69833 states and 107468 transitions. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 06:57:33,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:57:33,321 INFO L93 Difference]: Finished difference Result 182765 states and 285134 transitions. [2022-12-14 06:57:33,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 06:57:33,322 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 124 [2022-12-14 06:57:33,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:57:33,738 INFO L225 Difference]: With dead ends: 182765 [2022-12-14 06:57:33,738 INFO L226 Difference]: Without dead ends: 112939 [2022-12-14 06:57:33,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 06:57:33,918 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 728 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 734 SdHoareTripleChecker+Valid, 751 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 06:57:33,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [734 Valid, 751 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 06:57:34,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112939 states. [2022-12-14 06:57:40,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112939 to 103721. [2022-12-14 06:57:40,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103721 states, 86756 states have (on average 1.4699156254322467) internal successors, (127524), 87237 states have internal predecessors, (127524), 12356 states have call successors, (12356), 4608 states have call predecessors, (12356), 4608 states have return successors, (19156), 11876 states have call predecessors, (19156), 12356 states have call successors, (19156) [2022-12-14 06:57:41,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103721 states to 103721 states and 159036 transitions. [2022-12-14 06:57:41,058 INFO L78 Accepts]: Start accepts. Automaton has 103721 states and 159036 transitions. Word has length 124 [2022-12-14 06:57:41,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:57:41,059 INFO L495 AbstractCegarLoop]: Abstraction has 103721 states and 159036 transitions. [2022-12-14 06:57:41,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 06:57:41,059 INFO L276 IsEmpty]: Start isEmpty. Operand 103721 states and 159036 transitions. [2022-12-14 06:57:41,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-12-14 06:57:41,130 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:57:41,130 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:57:41,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-14 06:57:41,131 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:57:41,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:57:41,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1611365102, now seen corresponding path program 1 times [2022-12-14 06:57:41,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:57:41,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159812022] [2022-12-14 06:57:41,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:57:41,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:57:41,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:57:41,561 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 06:57:41,561 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:57:41,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159812022] [2022-12-14 06:57:41,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159812022] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:57:41,562 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:57:41,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 06:57:41,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373992675] [2022-12-14 06:57:41,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:57:41,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 06:57:41,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:57:41,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 06:57:41,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:57:41,563 INFO L87 Difference]: Start difference. First operand 103721 states and 159036 transitions. Second operand has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 06:57:55,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:57:55,600 INFO L93 Difference]: Finished difference Result 316525 states and 496815 transitions. [2022-12-14 06:57:55,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 06:57:55,601 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 125 [2022-12-14 06:57:55,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:57:56,344 INFO L225 Difference]: With dead ends: 316525 [2022-12-14 06:57:56,344 INFO L226 Difference]: Without dead ends: 212811 [2022-12-14 06:57:56,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 06:57:56,579 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 699 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 718 SdHoareTripleChecker+Valid, 546 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 06:57:56,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [718 Valid, 546 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 06:57:56,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212811 states. [2022-12-14 06:58:10,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212811 to 202825. [2022-12-14 06:58:10,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202825 states, 169668 states have (on average 1.4624560907183441) internal successors, (248132), 170629 states have internal predecessors, (248132), 23940 states have call successors, (23940), 9216 states have call predecessors, (23940), 9216 states have return successors, (36868), 22980 states have call predecessors, (36868), 23940 states have call successors, (36868) [2022-12-14 06:58:11,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202825 states to 202825 states and 308940 transitions. [2022-12-14 06:58:11,408 INFO L78 Accepts]: Start accepts. Automaton has 202825 states and 308940 transitions. Word has length 125 [2022-12-14 06:58:11,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:58:11,409 INFO L495 AbstractCegarLoop]: Abstraction has 202825 states and 308940 transitions. [2022-12-14 06:58:11,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 06:58:11,409 INFO L276 IsEmpty]: Start isEmpty. Operand 202825 states and 308940 transitions. [2022-12-14 06:58:11,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-12-14 06:58:11,547 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:58:11,547 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:58:11,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-14 06:58:11,548 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:58:11,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:58:11,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1475469273, now seen corresponding path program 1 times [2022-12-14 06:58:11,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:58:11,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787578036] [2022-12-14 06:58:11,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:58:11,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:58:11,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:58:11,789 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 06:58:11,789 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:58:11,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787578036] [2022-12-14 06:58:11,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787578036] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:58:11,789 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:58:11,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 06:58:11,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662238914] [2022-12-14 06:58:11,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:58:11,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 06:58:11,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:58:11,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 06:58:11,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:58:11,791 INFO L87 Difference]: Start difference. First operand 202825 states and 308940 transitions. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 06:58:38,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:58:38,004 INFO L93 Difference]: Finished difference Result 548781 states and 844622 transitions. [2022-12-14 06:58:38,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 06:58:38,005 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 126 [2022-12-14 06:58:38,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:58:39,257 INFO L225 Difference]: With dead ends: 548781 [2022-12-14 06:58:39,258 INFO L226 Difference]: Without dead ends: 345963 [2022-12-14 06:58:39,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 06:58:39,755 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 776 mSDsluCounter, 578 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 782 SdHoareTripleChecker+Valid, 796 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 06:58:39,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [782 Valid, 796 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 06:58:40,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345963 states. [2022-12-14 06:59:02,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345963 to 301161. [2022-12-14 06:59:02,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301161 states, 251812 states have (on average 1.4567216812542692) internal successors, (366820), 253253 states have internal predecessors, (366820), 35524 states have call successors, (35524), 13824 states have call predecessors, (35524), 13824 states have return successors, (54580), 34084 states have call predecessors, (54580), 35524 states have call successors, (54580) [2022-12-14 06:59:04,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301161 states to 301161 states and 456924 transitions. [2022-12-14 06:59:04,167 INFO L78 Accepts]: Start accepts. Automaton has 301161 states and 456924 transitions. Word has length 126 [2022-12-14 06:59:04,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:59:04,167 INFO L495 AbstractCegarLoop]: Abstraction has 301161 states and 456924 transitions. [2022-12-14 06:59:04,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 06:59:04,168 INFO L276 IsEmpty]: Start isEmpty. Operand 301161 states and 456924 transitions. [2022-12-14 06:59:04,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-12-14 06:59:04,341 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:59:04,341 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:59:04,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-14 06:59:04,341 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:59:04,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:59:04,341 INFO L85 PathProgramCache]: Analyzing trace with hash -366610502, now seen corresponding path program 1 times [2022-12-14 06:59:04,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:59:04,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789771986] [2022-12-14 06:59:04,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:59:04,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:59:04,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:59:04,560 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 06:59:04,560 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:59:04,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789771986] [2022-12-14 06:59:04,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789771986] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:59:04,560 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:59:04,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 06:59:04,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202398908] [2022-12-14 06:59:04,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:59:04,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 06:59:04,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:59:04,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 06:59:04,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:59:04,562 INFO L87 Difference]: Start difference. First operand 301161 states and 456924 transitions. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 06:59:45,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:59:45,750 INFO L93 Difference]: Finished difference Result 807421 states and 1239998 transitions. [2022-12-14 06:59:45,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 06:59:45,751 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 127 [2022-12-14 06:59:45,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:59:48,052 INFO L225 Difference]: With dead ends: 807421 [2022-12-14 06:59:48,052 INFO L226 Difference]: Without dead ends: 506267 [2022-12-14 06:59:49,062 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 06:59:49,062 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 759 mSDsluCounter, 563 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 765 SdHoareTripleChecker+Valid, 781 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 06:59:49,062 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [765 Valid, 781 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 344 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 06:59:49,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506267 states. [2022-12-14 07:00:26,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506267 to 447129. [2022-12-14 07:00:27,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447129 states, 373684 states have (on average 1.4508622258378736) internal successors, (542164), 375845 states have internal predecessors, (542164), 52708 states have call successors, (52708), 20736 states have call predecessors, (52708), 20736 states have return successors, (80788), 50548 states have call predecessors, (80788), 52708 states have call successors, (80788) [2022-12-14 07:00:29,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447129 states to 447129 states and 675660 transitions. [2022-12-14 07:00:29,070 INFO L78 Accepts]: Start accepts. Automaton has 447129 states and 675660 transitions. Word has length 127 [2022-12-14 07:00:29,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:00:29,071 INFO L495 AbstractCegarLoop]: Abstraction has 447129 states and 675660 transitions. [2022-12-14 07:00:29,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 07:00:29,071 INFO L276 IsEmpty]: Start isEmpty. Operand 447129 states and 675660 transitions. [2022-12-14 07:00:29,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-12-14 07:00:29,436 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:00:29,436 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:00:29,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-14 07:00:29,436 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:00:29,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:00:29,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1984105475, now seen corresponding path program 1 times [2022-12-14 07:00:29,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:00:29,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308780825] [2022-12-14 07:00:29,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:00:29,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:00:29,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:00:29,657 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 07:00:29,657 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:00:29,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308780825] [2022-12-14 07:00:29,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308780825] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:00:29,657 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:00:29,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 07:00:29,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277452615] [2022-12-14 07:00:29,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:00:29,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 07:00:29,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:00:29,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 07:00:29,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 07:00:29,659 INFO L87 Difference]: Start difference. First operand 447129 states and 675660 transitions. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 07:02:01,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:02:01,448 INFO L93 Difference]: Finished difference Result 1470397 states and 2258943 transitions. [2022-12-14 07:02:01,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 07:02:01,449 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 128 [2022-12-14 07:02:01,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:02:06,556 INFO L225 Difference]: With dead ends: 1470397 [2022-12-14 07:02:06,556 INFO L226 Difference]: Without dead ends: 1023275 [2022-12-14 07:02:08,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 07:02:08,166 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 827 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 846 SdHoareTripleChecker+Valid, 574 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 07:02:08,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [846 Valid, 574 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 07:02:09,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1023275 states. [2022-12-14 07:03:27,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1023275 to 873513. [2022-12-14 07:03:28,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 873513 states, 730084 states have (on average 1.4426011253499598) internal successors, (1053220), 734405 states have internal predecessors, (1053220), 101956 states have call successors, (101956), 41472 states have call predecessors, (101956), 41472 states have return successors, (155092), 97636 states have call predecessors, (155092), 101956 states have call successors, (155092) [2022-12-14 07:03:33,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 873513 states to 873513 states and 1310268 transitions. [2022-12-14 07:03:33,505 INFO L78 Accepts]: Start accepts. Automaton has 873513 states and 1310268 transitions. Word has length 128 [2022-12-14 07:03:33,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:03:33,506 INFO L495 AbstractCegarLoop]: Abstraction has 873513 states and 1310268 transitions. [2022-12-14 07:03:33,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 07:03:33,506 INFO L276 IsEmpty]: Start isEmpty. Operand 873513 states and 1310268 transitions. [2022-12-14 07:03:34,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-12-14 07:03:34,266 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:03:34,272 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:03:34,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-14 07:03:34,274 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:03:34,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:03:34,291 INFO L85 PathProgramCache]: Analyzing trace with hash 116090846, now seen corresponding path program 1 times [2022-12-14 07:03:34,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:03:34,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135000720] [2022-12-14 07:03:34,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:03:34,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:03:34,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:03:34,680 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 07:03:34,681 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:03:34,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135000720] [2022-12-14 07:03:34,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135000720] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:03:34,681 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:03:34,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 07:03:34,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324188117] [2022-12-14 07:03:34,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:03:34,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 07:03:34,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:03:34,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 07:03:34,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 07:03:34,683 INFO L87 Difference]: Start difference. First operand 873513 states and 1310268 transitions. Second operand has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8)