./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem03_label47.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a 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_8ec21335-57e1-4eaa-bc8d-f6e3b0e13d84/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ec21335-57e1-4eaa-bc8d-f6e3b0e13d84/bin/uautomizer-Dbtcem3rbc/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ec21335-57e1-4eaa-bc8d-f6e3b0e13d84/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ec21335-57e1-4eaa-bc8d-f6e3b0e13d84/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem03_label47.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ec21335-57e1-4eaa-bc8d-f6e3b0e13d84/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ec21335-57e1-4eaa-bc8d-f6e3b0e13d84/bin/uautomizer-Dbtcem3rbc --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c56a954c6b6423eb9dc896d65464ae85499e68477be4edbb5172c2d6eb981204 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-02 20:47:08,885 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:47:08,894 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:47:08,958 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:47:08,959 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:47:08,965 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:47:08,968 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:47:08,973 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:47:08,977 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:47:08,984 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:47:08,985 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:47:08,989 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:47:08,989 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:47:08,992 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:47:08,995 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:47:08,998 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:47:09,000 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:47:09,001 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:47:09,003 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:47:09,015 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:47:09,017 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:47:09,019 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:47:09,023 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:47:09,025 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:47:09,036 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:47:09,036 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:47:09,037 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:47:09,039 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:47:09,040 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:47:09,041 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:47:09,043 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:47:09,044 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:47:09,047 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:47:09,049 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:47:09,050 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:47:09,051 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:47:09,052 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:47:09,052 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:47:09,052 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:47:09,054 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:47:09,055 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:47:09,056 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ec21335-57e1-4eaa-bc8d-f6e3b0e13d84/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-02 20:47:09,107 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:47:09,107 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:47:09,108 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:47:09,109 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:47:09,110 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:47:09,110 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:47:09,111 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:47:09,111 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:47:09,112 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:47:09,112 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:47:09,113 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 20:47:09,114 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:47:09,114 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 20:47:09,114 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:47:09,115 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 20:47:09,115 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:47:09,115 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 20:47:09,116 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 20:47:09,116 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 20:47:09,116 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:47:09,116 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 20:47:09,117 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:47:09,117 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:47:09,117 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:47:09,117 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:47:09,118 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:47:09,120 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:47:09,120 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 20:47:09,120 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 20:47:09,121 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 20:47:09,121 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 20:47:09,121 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 20:47:09,122 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 20:47:09,122 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_8ec21335-57e1-4eaa-bc8d-f6e3b0e13d84/bin/uautomizer-Dbtcem3rbc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ec21335-57e1-4eaa-bc8d-f6e3b0e13d84/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c56a954c6b6423eb9dc896d65464ae85499e68477be4edbb5172c2d6eb981204 [2022-11-02 20:47:09,489 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:47:09,539 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:47:09,543 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:47:09,545 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:47:09,546 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:47:09,547 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ec21335-57e1-4eaa-bc8d-f6e3b0e13d84/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/eca-rers2012/Problem03_label47.c [2022-11-02 20:47:09,624 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ec21335-57e1-4eaa-bc8d-f6e3b0e13d84/bin/uautomizer-Dbtcem3rbc/data/fd2d4209d/ed6af3dd86fb4e6a9b8f15415c6d91c0/FLAG0dc06784d [2022-11-02 20:47:10,503 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:47:10,506 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ec21335-57e1-4eaa-bc8d-f6e3b0e13d84/sv-benchmarks/c/eca-rers2012/Problem03_label47.c [2022-11-02 20:47:10,524 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ec21335-57e1-4eaa-bc8d-f6e3b0e13d84/bin/uautomizer-Dbtcem3rbc/data/fd2d4209d/ed6af3dd86fb4e6a9b8f15415c6d91c0/FLAG0dc06784d [2022-11-02 20:47:11,033 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ec21335-57e1-4eaa-bc8d-f6e3b0e13d84/bin/uautomizer-Dbtcem3rbc/data/fd2d4209d/ed6af3dd86fb4e6a9b8f15415c6d91c0 [2022-11-02 20:47:11,036 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:47:11,038 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:47:11,040 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:47:11,040 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:47:11,045 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:47:11,046 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:47:11" (1/1) ... [2022-11-02 20:47:11,048 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3181133f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:47:11, skipping insertion in model container [2022-11-02 20:47:11,048 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:47:11" (1/1) ... [2022-11-02 20:47:11,058 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:47:11,164 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:47:12,042 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ec21335-57e1-4eaa-bc8d-f6e3b0e13d84/sv-benchmarks/c/eca-rers2012/Problem03_label47.c[60825,60838] [2022-11-02 20:47:12,079 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:47:12,093 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:47:12,470 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ec21335-57e1-4eaa-bc8d-f6e3b0e13d84/sv-benchmarks/c/eca-rers2012/Problem03_label47.c[60825,60838] [2022-11-02 20:47:12,480 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:47:12,506 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:47:12,507 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:47:12 WrapperNode [2022-11-02 20:47:12,507 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:47:12,508 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:47:12,509 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:47:12,509 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:47:12,519 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:47:12" (1/1) ... [2022-11-02 20:47:12,581 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:47:12" (1/1) ... [2022-11-02 20:47:12,683 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2022-11-02 20:47:12,684 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:47:12,685 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:47:12,685 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:47:12,685 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:47:12,697 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:47:12" (1/1) ... [2022-11-02 20:47:12,698 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:47:12" (1/1) ... [2022-11-02 20:47:12,710 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:47:12" (1/1) ... [2022-11-02 20:47:12,710 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:47:12" (1/1) ... [2022-11-02 20:47:12,766 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:47:12" (1/1) ... [2022-11-02 20:47:12,780 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:47:12" (1/1) ... [2022-11-02 20:47:12,797 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:47:12" (1/1) ... [2022-11-02 20:47:12,809 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:47:12" (1/1) ... [2022-11-02 20:47:12,828 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:47:12,829 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:47:12,829 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:47:12,830 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:47:12,831 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:47:12" (1/1) ... [2022-11-02 20:47:12,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:47:12,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ec21335-57e1-4eaa-bc8d-f6e3b0e13d84/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:47:12,886 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ec21335-57e1-4eaa-bc8d-f6e3b0e13d84/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:47:12,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ec21335-57e1-4eaa-bc8d-f6e3b0e13d84/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:47:12,946 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 20:47:12,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 20:47:12,946 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:47:12,947 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:47:13,111 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:47:13,114 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:47:15,570 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:47:15,591 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:47:15,591 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-02 20:47:15,594 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:47:15 BoogieIcfgContainer [2022-11-02 20:47:15,595 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:47:15,597 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:47:15,597 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:47:15,601 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:47:15,601 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:47:11" (1/3) ... [2022-11-02 20:47:15,602 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a736a81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:47:15, skipping insertion in model container [2022-11-02 20:47:15,602 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:47:12" (2/3) ... [2022-11-02 20:47:15,603 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a736a81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:47:15, skipping insertion in model container [2022-11-02 20:47:15,603 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:47:15" (3/3) ... [2022-11-02 20:47:15,604 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label47.c [2022-11-02 20:47:15,624 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:47:15,624 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 20:47:15,712 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:47:15,718 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=PETRI_NET, 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;@72e4d893, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:47:15,718 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-02 20:47:15,724 INFO L276 IsEmpty]: Start isEmpty. Operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:47:15,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-11-02 20:47:15,742 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:47:15,743 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:47:15,744 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:47:15,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:47:15,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1320339253, now seen corresponding path program 1 times [2022-11-02 20:47:15,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:47:15,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051717047] [2022-11-02 20:47:15,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:47:15,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:47:16,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:47:16,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:47:16,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:47:16,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051717047] [2022-11-02 20:47:16,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051717047] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:47:16,885 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:47:16,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:47:16,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911712854] [2022-11-02 20:47:16,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:47:16,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:47:16,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:47:16,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:47:16,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:47:16,931 INFO L87 Difference]: Start difference. First operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 2 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:47:18,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:47:18,519 INFO L93 Difference]: Finished difference Result 835 states and 1478 transitions. [2022-11-02 20:47:18,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:47:18,528 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 2 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 197 [2022-11-02 20:47:18,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:47:18,545 INFO L225 Difference]: With dead ends: 835 [2022-11-02 20:47:18,545 INFO L226 Difference]: Without dead ends: 456 [2022-11-02 20:47:18,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:47:18,554 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 91 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:47:18,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 161 Invalid, 852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 677 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-02 20:47:18,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2022-11-02 20:47:18,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 451. [2022-11-02 20:47:18,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 450 states have (on average 1.5622222222222222) internal successors, (703), 450 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:47:18,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 703 transitions. [2022-11-02 20:47:18,631 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 703 transitions. Word has length 197 [2022-11-02 20:47:18,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:47:18,633 INFO L495 AbstractCegarLoop]: Abstraction has 451 states and 703 transitions. [2022-11-02 20:47:18,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 2 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:47:18,634 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 703 transitions. [2022-11-02 20:47:18,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-11-02 20:47:18,640 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:47:18,640 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:47:18,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 20:47:18,641 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:47:18,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:47:18,643 INFO L85 PathProgramCache]: Analyzing trace with hash 762607613, now seen corresponding path program 1 times [2022-11-02 20:47:18,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:47:18,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297325817] [2022-11-02 20:47:18,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:47:18,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:47:18,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:47:19,242 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:47:19,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:47:19,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297325817] [2022-11-02 20:47:19,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297325817] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:47:19,244 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:47:19,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:47:19,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874950507] [2022-11-02 20:47:19,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:47:19,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:47:19,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:47:19,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:47:19,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:47:19,248 INFO L87 Difference]: Start difference. First operand 451 states and 703 transitions. Second operand has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 2 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:47:20,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:47:20,400 INFO L93 Difference]: Finished difference Result 1340 states and 2094 transitions. [2022-11-02 20:47:20,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:47:20,401 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 2 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 203 [2022-11-02 20:47:20,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:47:20,406 INFO L225 Difference]: With dead ends: 1340 [2022-11-02 20:47:20,406 INFO L226 Difference]: Without dead ends: 891 [2022-11-02 20:47:20,408 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:47:20,410 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 285 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:47:20,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 154 Invalid, 725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 703 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-02 20:47:20,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2022-11-02 20:47:20,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 887. [2022-11-02 20:47:20,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 887 states, 886 states have (on average 1.5474040632054176) internal successors, (1371), 886 states have internal predecessors, (1371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:47:20,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 1371 transitions. [2022-11-02 20:47:20,450 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 1371 transitions. Word has length 203 [2022-11-02 20:47:20,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:47:20,451 INFO L495 AbstractCegarLoop]: Abstraction has 887 states and 1371 transitions. [2022-11-02 20:47:20,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 2 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:47:20,452 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 1371 transitions. [2022-11-02 20:47:20,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-11-02 20:47:20,457 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:47:20,458 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:47:20,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-02 20:47:20,458 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:47:20,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:47:20,459 INFO L85 PathProgramCache]: Analyzing trace with hash -2121747663, now seen corresponding path program 1 times [2022-11-02 20:47:20,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:47:20,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457953736] [2022-11-02 20:47:20,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:47:20,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:47:20,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:47:20,965 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:47:20,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:47:20,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457953736] [2022-11-02 20:47:20,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457953736] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:47:20,968 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:47:20,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:47:20,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977591877] [2022-11-02 20:47:20,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:47:20,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:47:20,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:47:20,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:47:20,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:47:20,973 INFO L87 Difference]: Start difference. First operand 887 states and 1371 transitions. Second operand has 3 states, 3 states have (on average 69.0) internal successors, (207), 2 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:47:22,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:47:22,139 INFO L93 Difference]: Finished difference Result 2612 states and 4042 transitions. [2022-11-02 20:47:22,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:47:22,140 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 2 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 207 [2022-11-02 20:47:22,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:47:22,147 INFO L225 Difference]: With dead ends: 2612 [2022-11-02 20:47:22,147 INFO L226 Difference]: Without dead ends: 1727 [2022-11-02 20:47:22,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:47:22,154 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 236 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:47:22,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [236 Valid, 112 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-02 20:47:22,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1727 states. [2022-11-02 20:47:22,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1727 to 1725. [2022-11-02 20:47:22,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1725 states, 1724 states have (on average 1.472737819025522) internal successors, (2539), 1724 states have internal predecessors, (2539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:47:22,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1725 states to 1725 states and 2539 transitions. [2022-11-02 20:47:22,211 INFO L78 Accepts]: Start accepts. Automaton has 1725 states and 2539 transitions. Word has length 207 [2022-11-02 20:47:22,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:47:22,211 INFO L495 AbstractCegarLoop]: Abstraction has 1725 states and 2539 transitions. [2022-11-02 20:47:22,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 2 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:47:22,212 INFO L276 IsEmpty]: Start isEmpty. Operand 1725 states and 2539 transitions. [2022-11-02 20:47:22,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2022-11-02 20:47:22,221 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:47:22,221 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:47:22,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-02 20:47:22,222 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:47:22,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:47:22,224 INFO L85 PathProgramCache]: Analyzing trace with hash 410525721, now seen corresponding path program 1 times [2022-11-02 20:47:22,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:47:22,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975968876] [2022-11-02 20:47:22,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:47:22,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:47:22,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:47:22,556 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:47:22,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:47:22,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975968876] [2022-11-02 20:47:22,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975968876] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:47:22,558 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:47:22,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:47:22,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930132806] [2022-11-02 20:47:22,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:47:22,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:47:22,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:47:22,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:47:22,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:47:22,561 INFO L87 Difference]: Start difference. First operand 1725 states and 2539 transitions. Second operand has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:47:23,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:47:23,631 INFO L93 Difference]: Finished difference Result 5073 states and 7473 transitions. [2022-11-02 20:47:23,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:47:23,632 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 209 [2022-11-02 20:47:23,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:47:23,645 INFO L225 Difference]: With dead ends: 5073 [2022-11-02 20:47:23,646 INFO L226 Difference]: Without dead ends: 3350 [2022-11-02 20:47:23,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:47:23,661 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 216 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:47:23,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 192 Invalid, 694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 568 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-02 20:47:23,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3350 states. [2022-11-02 20:47:23,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3350 to 3350. [2022-11-02 20:47:23,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3350 states, 3349 states have (on average 1.3126306360107496) internal successors, (4396), 3349 states have internal predecessors, (4396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:47:23,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3350 states to 3350 states and 4396 transitions. [2022-11-02 20:47:23,740 INFO L78 Accepts]: Start accepts. Automaton has 3350 states and 4396 transitions. Word has length 209 [2022-11-02 20:47:23,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:47:23,741 INFO L495 AbstractCegarLoop]: Abstraction has 3350 states and 4396 transitions. [2022-11-02 20:47:23,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:47:23,742 INFO L276 IsEmpty]: Start isEmpty. Operand 3350 states and 4396 transitions. [2022-11-02 20:47:23,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2022-11-02 20:47:23,749 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:47:23,749 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:47:23,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-02 20:47:23,750 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:47:23,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:47:23,751 INFO L85 PathProgramCache]: Analyzing trace with hash -367744042, now seen corresponding path program 1 times [2022-11-02 20:47:23,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:47:23,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235749096] [2022-11-02 20:47:23,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:47:23,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:47:23,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:47:24,217 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:47:24,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:47:24,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235749096] [2022-11-02 20:47:24,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235749096] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:47:24,219 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:47:24,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:47:24,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318634858] [2022-11-02 20:47:24,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:47:24,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:47:24,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:47:24,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:47:24,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:47:24,223 INFO L87 Difference]: Start difference. First operand 3350 states and 4396 transitions. Second operand has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 2 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:47:25,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:47:25,409 INFO L93 Difference]: Finished difference Result 10015 states and 13149 transitions. [2022-11-02 20:47:25,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:47:25,411 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 2 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 209 [2022-11-02 20:47:25,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:47:25,432 INFO L225 Difference]: With dead ends: 10015 [2022-11-02 20:47:25,432 INFO L226 Difference]: Without dead ends: 6667 [2022-11-02 20:47:25,439 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:47:25,442 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 275 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:47:25,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [275 Valid, 216 Invalid, 758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 735 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-02 20:47:25,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6667 states. [2022-11-02 20:47:25,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6667 to 6652. [2022-11-02 20:47:25,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6652 states, 6651 states have (on average 1.3014584273041647) internal successors, (8656), 6651 states have internal predecessors, (8656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:47:25,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6652 states to 6652 states and 8656 transitions. [2022-11-02 20:47:25,611 INFO L78 Accepts]: Start accepts. Automaton has 6652 states and 8656 transitions. Word has length 209 [2022-11-02 20:47:25,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:47:25,612 INFO L495 AbstractCegarLoop]: Abstraction has 6652 states and 8656 transitions. [2022-11-02 20:47:25,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 2 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:47:25,617 INFO L276 IsEmpty]: Start isEmpty. Operand 6652 states and 8656 transitions. [2022-11-02 20:47:25,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2022-11-02 20:47:25,631 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:47:25,631 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:47:25,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-02 20:47:25,632 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:47:25,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:47:25,633 INFO L85 PathProgramCache]: Analyzing trace with hash 520593402, now seen corresponding path program 1 times [2022-11-02 20:47:25,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:47:25,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304359143] [2022-11-02 20:47:25,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:47:25,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:47:25,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:47:26,155 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 19 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:47:26,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:47:26,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304359143] [2022-11-02 20:47:26,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304359143] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:47:26,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836420558] [2022-11-02 20:47:26,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:47:26,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:47:26,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ec21335-57e1-4eaa-bc8d-f6e3b0e13d84/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:47:26,162 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ec21335-57e1-4eaa-bc8d-f6e3b0e13d84/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:47:26,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ec21335-57e1-4eaa-bc8d-f6e3b0e13d84/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 20:47:26,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:47:26,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-02 20:47:26,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:47:26,507 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-02 20:47:26,507 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:47:26,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836420558] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:47:26,507 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:47:26,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-11-02 20:47:26,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260573325] [2022-11-02 20:47:26,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:47:26,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:47:26,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:47:26,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:47:26,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:47:26,510 INFO L87 Difference]: Start difference. First operand 6652 states and 8656 transitions. Second operand has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 2 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:47:27,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:47:27,728 INFO L93 Difference]: Finished difference Result 19837 states and 25803 transitions. [2022-11-02 20:47:27,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:47:27,729 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 2 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 217 [2022-11-02 20:47:27,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:47:27,797 INFO L225 Difference]: With dead ends: 19837 [2022-11-02 20:47:27,797 INFO L226 Difference]: Without dead ends: 13187 [2022-11-02 20:47:27,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:47:27,807 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 239 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:47:27,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [239 Valid, 198 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 622 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-02 20:47:27,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13187 states. [2022-11-02 20:47:28,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13187 to 13182. [2022-11-02 20:47:28,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13182 states, 13181 states have (on average 1.2631059858887792) internal successors, (16649), 13181 states have internal predecessors, (16649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:47:28,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13182 states to 13182 states and 16649 transitions. [2022-11-02 20:47:28,100 INFO L78 Accepts]: Start accepts. Automaton has 13182 states and 16649 transitions. Word has length 217 [2022-11-02 20:47:28,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:47:28,101 INFO L495 AbstractCegarLoop]: Abstraction has 13182 states and 16649 transitions. [2022-11-02 20:47:28,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 2 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:47:28,102 INFO L276 IsEmpty]: Start isEmpty. Operand 13182 states and 16649 transitions. [2022-11-02 20:47:28,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2022-11-02 20:47:28,126 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:47:28,126 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:47:28,167 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ec21335-57e1-4eaa-bc8d-f6e3b0e13d84/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-02 20:47:28,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ec21335-57e1-4eaa-bc8d-f6e3b0e13d84/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-02 20:47:28,347 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:47:28,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:47:28,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1324862698, now seen corresponding path program 1 times [2022-11-02 20:47:28,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:47:28,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421546456] [2022-11-02 20:47:28,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:47:28,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:47:28,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:47:28,833 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:47:28,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:47:28,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421546456] [2022-11-02 20:47:28,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421546456] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:47:28,834 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:47:28,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:47:28,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778959224] [2022-11-02 20:47:28,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:47:28,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:47:28,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:47:28,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:47:28,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:47:28,837 INFO L87 Difference]: Start difference. First operand 13182 states and 16649 transitions. Second operand has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 2 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:47:30,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:47:30,123 INFO L93 Difference]: Finished difference Result 33559 states and 42775 transitions. [2022-11-02 20:47:30,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:47:30,124 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 2 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 227 [2022-11-02 20:47:30,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:47:30,165 INFO L225 Difference]: With dead ends: 33559 [2022-11-02 20:47:30,165 INFO L226 Difference]: Without dead ends: 20379 [2022-11-02 20:47:30,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:47:30,178 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 211 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 786 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:47:30,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 239 Invalid, 801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 786 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-02 20:47:30,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20379 states. [2022-11-02 20:47:30,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20379 to 20326. [2022-11-02 20:47:30,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20326 states, 20325 states have (on average 1.2754735547355474) internal successors, (25924), 20325 states have internal predecessors, (25924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:47:30,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20326 states to 20326 states and 25924 transitions. [2022-11-02 20:47:30,676 INFO L78 Accepts]: Start accepts. Automaton has 20326 states and 25924 transitions. Word has length 227 [2022-11-02 20:47:30,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:47:30,677 INFO L495 AbstractCegarLoop]: Abstraction has 20326 states and 25924 transitions. [2022-11-02 20:47:30,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 2 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:47:30,679 INFO L276 IsEmpty]: Start isEmpty. Operand 20326 states and 25924 transitions. [2022-11-02 20:47:30,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2022-11-02 20:47:30,707 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:47:30,708 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:47:30,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-02 20:47:30,708 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:47:30,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:47:30,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1862555832, now seen corresponding path program 1 times [2022-11-02 20:47:30,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:47:30,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698130209] [2022-11-02 20:47:30,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:47:30,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:47:30,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:47:31,046 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-02 20:47:31,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:47:31,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698130209] [2022-11-02 20:47:31,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698130209] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:47:31,047 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:47:31,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:47:31,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976521037] [2022-11-02 20:47:31,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:47:31,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:47:31,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:47:31,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:47:31,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:47:31,052 INFO L87 Difference]: Start difference. First operand 20326 states and 25924 transitions. Second operand has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:47:32,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:47:32,519 INFO L93 Difference]: Finished difference Result 52638 states and 67815 transitions. [2022-11-02 20:47:32,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:47:32,520 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 231 [2022-11-02 20:47:32,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:47:32,589 INFO L225 Difference]: With dead ends: 52638 [2022-11-02 20:47:32,590 INFO L226 Difference]: Without dead ends: 33332 [2022-11-02 20:47:32,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:47:32,608 INFO L413 NwaCegarLoop]: 365 mSDtfsCounter, 251 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:47:32,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 390 Invalid, 706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 548 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-02 20:47:32,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33332 states. [2022-11-02 20:47:33,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33332 to 33331. [2022-11-02 20:47:33,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33331 states, 33330 states have (on average 1.2225922592259226) internal successors, (40749), 33330 states have internal predecessors, (40749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:47:33,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33331 states to 33331 states and 40749 transitions. [2022-11-02 20:47:33,394 INFO L78 Accepts]: Start accepts. Automaton has 33331 states and 40749 transitions. Word has length 231 [2022-11-02 20:47:33,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:47:33,394 INFO L495 AbstractCegarLoop]: Abstraction has 33331 states and 40749 transitions. [2022-11-02 20:47:33,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:47:33,395 INFO L276 IsEmpty]: Start isEmpty. Operand 33331 states and 40749 transitions. [2022-11-02 20:47:33,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2022-11-02 20:47:33,432 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:47:33,432 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:47:33,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-02 20:47:33,433 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:47:33,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:47:33,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1108124332, now seen corresponding path program 1 times [2022-11-02 20:47:33,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:47:33,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604376054] [2022-11-02 20:47:33,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:47:33,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:47:33,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:47:33,949 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-02 20:47:33,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:47:33,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604376054] [2022-11-02 20:47:33,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604376054] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:47:33,950 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:47:33,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:47:33,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856404161] [2022-11-02 20:47:33,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:47:33,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:47:33,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:47:33,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:47:33,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:47:33,952 INFO L87 Difference]: Start difference. First operand 33331 states and 40749 transitions. Second operand has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:47:35,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:47:35,405 INFO L93 Difference]: Finished difference Result 77250 states and 95396 transitions. [2022-11-02 20:47:35,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:47:35,406 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 237 [2022-11-02 20:47:35,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:47:35,642 INFO L225 Difference]: With dead ends: 77250 [2022-11-02 20:47:35,642 INFO L226 Difference]: Without dead ends: 45551 [2022-11-02 20:47:35,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:47:35,701 INFO L413 NwaCegarLoop]: 379 mSDtfsCounter, 218 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:47:35,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [218 Valid, 401 Invalid, 753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 598 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-02 20:47:35,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45551 states. [2022-11-02 20:47:36,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45551 to 45537. [2022-11-02 20:47:36,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45537 states, 45536 states have (on average 1.2016426563598033) internal successors, (54718), 45536 states have internal predecessors, (54718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:47:36,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45537 states to 45537 states and 54718 transitions. [2022-11-02 20:47:36,665 INFO L78 Accepts]: Start accepts. Automaton has 45537 states and 54718 transitions. Word has length 237 [2022-11-02 20:47:36,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:47:36,665 INFO L495 AbstractCegarLoop]: Abstraction has 45537 states and 54718 transitions. [2022-11-02 20:47:36,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:47:36,666 INFO L276 IsEmpty]: Start isEmpty. Operand 45537 states and 54718 transitions. [2022-11-02 20:47:36,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-11-02 20:47:36,728 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:47:36,728 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:47:36,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-02 20:47:36,729 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:47:36,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:47:36,730 INFO L85 PathProgramCache]: Analyzing trace with hash -940727076, now seen corresponding path program 1 times [2022-11-02 20:47:36,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:47:36,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448176803] [2022-11-02 20:47:36,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:47:36,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:47:36,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:47:37,154 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-02 20:47:37,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:47:37,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448176803] [2022-11-02 20:47:37,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448176803] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:47:37,155 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:47:37,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:47:37,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894798880] [2022-11-02 20:47:37,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:47:37,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:47:37,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:47:37,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:47:37,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:47:37,157 INFO L87 Difference]: Start difference. First operand 45537 states and 54718 transitions. Second operand has 3 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:47:38,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:47:38,479 INFO L93 Difference]: Finished difference Result 87595 states and 105332 transitions. [2022-11-02 20:47:38,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:47:38,480 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 239 [2022-11-02 20:47:38,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:47:38,560 INFO L225 Difference]: With dead ends: 87595 [2022-11-02 20:47:38,561 INFO L226 Difference]: Without dead ends: 43282 [2022-11-02 20:47:38,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:47:38,592 INFO L413 NwaCegarLoop]: 326 mSDtfsCounter, 251 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-02 20:47:38,593 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 351 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-02 20:47:38,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43282 states. [2022-11-02 20:47:39,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43282 to 43273. [2022-11-02 20:47:39,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43273 states, 43272 states have (on average 1.1591329266038084) internal successors, (50158), 43272 states have internal predecessors, (50158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:47:39,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43273 states to 43273 states and 50158 transitions. [2022-11-02 20:47:39,524 INFO L78 Accepts]: Start accepts. Automaton has 43273 states and 50158 transitions. Word has length 239 [2022-11-02 20:47:39,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:47:39,524 INFO L495 AbstractCegarLoop]: Abstraction has 43273 states and 50158 transitions. [2022-11-02 20:47:39,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:47:39,525 INFO L276 IsEmpty]: Start isEmpty. Operand 43273 states and 50158 transitions. [2022-11-02 20:47:39,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2022-11-02 20:47:39,577 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:47:39,577 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:47:39,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-02 20:47:39,578 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:47:39,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:47:39,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1903783635, now seen corresponding path program 1 times [2022-11-02 20:47:39,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:47:39,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933180747] [2022-11-02 20:47:39,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:47:39,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:47:39,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:47:40,306 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-02 20:47:40,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:47:40,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933180747] [2022-11-02 20:47:40,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933180747] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:47:40,307 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:47:40,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:47:40,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522367388] [2022-11-02 20:47:40,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:47:40,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:47:40,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:47:40,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:47:40,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:47:40,310 INFO L87 Difference]: Start difference. First operand 43273 states and 50158 transitions. Second operand has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 2 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:47:41,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:47:41,755 INFO L93 Difference]: Finished difference Result 100632 states and 116846 transitions. [2022-11-02 20:47:41,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:47:41,756 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 2 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 261 [2022-11-02 20:47:41,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:47:41,835 INFO L225 Difference]: With dead ends: 100632 [2022-11-02 20:47:41,835 INFO L226 Difference]: Without dead ends: 59399 [2022-11-02 20:47:41,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:47:41,863 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 243 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 726 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:47:41,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 167 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 726 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-02 20:47:41,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59399 states. [2022-11-02 20:47:42,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59399 to 59379. [2022-11-02 20:47:43,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59379 states, 59378 states have (on average 1.1606655663713834) internal successors, (68918), 59378 states have internal predecessors, (68918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:47:43,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59379 states to 59379 states and 68918 transitions. [2022-11-02 20:47:43,180 INFO L78 Accepts]: Start accepts. Automaton has 59379 states and 68918 transitions. Word has length 261 [2022-11-02 20:47:43,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:47:43,181 INFO L495 AbstractCegarLoop]: Abstraction has 59379 states and 68918 transitions. [2022-11-02 20:47:43,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 2 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:47:43,181 INFO L276 IsEmpty]: Start isEmpty. Operand 59379 states and 68918 transitions. [2022-11-02 20:47:43,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2022-11-02 20:47:43,250 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:47:43,250 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:47:43,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-02 20:47:43,251 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:47:43,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:47:43,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1201486856, now seen corresponding path program 1 times [2022-11-02 20:47:43,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:47:43,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928867830] [2022-11-02 20:47:43,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:47:43,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:47:43,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:47:44,018 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-11-02 20:47:44,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:47:44,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928867830] [2022-11-02 20:47:44,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928867830] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:47:44,019 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:47:44,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:47:44,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686439129] [2022-11-02 20:47:44,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:47:44,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:47:44,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:47:44,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:47:44,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:47:44,022 INFO L87 Difference]: Start difference. First operand 59379 states and 68918 transitions. Second operand has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 2 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:47:45,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:47:45,746 INFO L93 Difference]: Finished difference Result 148332 states and 172951 transitions. [2022-11-02 20:47:45,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:47:45,747 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 2 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 263 [2022-11-02 20:47:45,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:47:45,879 INFO L225 Difference]: With dead ends: 148332 [2022-11-02 20:47:45,880 INFO L226 Difference]: Without dead ends: 90993 [2022-11-02 20:47:45,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:47:45,914 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 219 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 674 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:47:45,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 185 Invalid, 765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 674 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-02 20:47:46,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90993 states. [2022-11-02 20:47:47,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90993 to 90955. [2022-11-02 20:47:47,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90955 states, 90954 states have (on average 1.155034412999978) internal successors, (105055), 90954 states have internal predecessors, (105055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:47:47,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90955 states to 90955 states and 105055 transitions. [2022-11-02 20:47:47,733 INFO L78 Accepts]: Start accepts. Automaton has 90955 states and 105055 transitions. Word has length 263 [2022-11-02 20:47:47,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:47:47,734 INFO L495 AbstractCegarLoop]: Abstraction has 90955 states and 105055 transitions. [2022-11-02 20:47:47,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 2 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:47:47,734 INFO L276 IsEmpty]: Start isEmpty. Operand 90955 states and 105055 transitions. [2022-11-02 20:47:47,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2022-11-02 20:47:47,817 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:47:47,817 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:47:47,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-02 20:47:47,818 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:47:47,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:47:47,819 INFO L85 PathProgramCache]: Analyzing trace with hash -2127219920, now seen corresponding path program 1 times [2022-11-02 20:47:47,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:47:47,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413395014] [2022-11-02 20:47:47,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:47:47,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:47:47,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:47:48,403 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 86 proven. 6 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-02 20:47:48,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:47:48,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413395014] [2022-11-02 20:47:48,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413395014] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:47:48,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169211278] [2022-11-02 20:47:48,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:47:48,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:47:48,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ec21335-57e1-4eaa-bc8d-f6e3b0e13d84/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:47:48,406 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ec21335-57e1-4eaa-bc8d-f6e3b0e13d84/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:47:48,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ec21335-57e1-4eaa-bc8d-f6e3b0e13d84/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 20:47:48,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:47:48,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 569 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-02 20:47:48,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:47:49,270 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-02 20:47:49,271 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:47:49,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169211278] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:47:49,272 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:47:49,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-02 20:47:49,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255838121] [2022-11-02 20:47:49,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:47:49,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:47:49,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:47:49,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:47:49,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:47:49,276 INFO L87 Difference]: Start difference. First operand 90955 states and 105055 transitions. Second operand has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:47:50,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:47:50,734 INFO L93 Difference]: Finished difference Result 173868 states and 201864 transitions. [2022-11-02 20:47:50,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:47:50,735 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 272 [2022-11-02 20:47:50,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:47:51,125 INFO L225 Difference]: With dead ends: 173868 [2022-11-02 20:47:51,125 INFO L226 Difference]: Without dead ends: 85156 [2022-11-02 20:47:51,186 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:47:51,187 INFO L413 NwaCegarLoop]: 372 mSDtfsCounter, 43 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-02 20:47:51,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 401 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-02 20:47:51,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85156 states. [2022-11-02 20:47:52,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85156 to 85140. [2022-11-02 20:47:52,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85140 states, 85139 states have (on average 1.104288281516109) internal successors, (94018), 85139 states have internal predecessors, (94018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:47:52,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85140 states to 85140 states and 94018 transitions. [2022-11-02 20:47:52,249 INFO L78 Accepts]: Start accepts. Automaton has 85140 states and 94018 transitions. Word has length 272 [2022-11-02 20:47:52,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:47:52,249 INFO L495 AbstractCegarLoop]: Abstraction has 85140 states and 94018 transitions. [2022-11-02 20:47:52,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:47:52,249 INFO L276 IsEmpty]: Start isEmpty. Operand 85140 states and 94018 transitions. [2022-11-02 20:47:52,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2022-11-02 20:47:52,329 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:47:52,330 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:47:52,372 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ec21335-57e1-4eaa-bc8d-f6e3b0e13d84/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-02 20:47:52,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ec21335-57e1-4eaa-bc8d-f6e3b0e13d84/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:47:52,543 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:47:52,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:47:52,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1243970244, now seen corresponding path program 1 times [2022-11-02 20:47:52,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:47:52,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593171282] [2022-11-02 20:47:52,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:47:52,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:47:52,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:47:53,397 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 112 proven. 6 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2022-11-02 20:47:53,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:47:53,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593171282] [2022-11-02 20:47:53,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593171282] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:47:53,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36689228] [2022-11-02 20:47:53,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:47:53,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:47:53,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ec21335-57e1-4eaa-bc8d-f6e3b0e13d84/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:47:53,401 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ec21335-57e1-4eaa-bc8d-f6e3b0e13d84/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:47:53,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ec21335-57e1-4eaa-bc8d-f6e3b0e13d84/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-02 20:47:53,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:47:53,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 629 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-02 20:47:53,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:47:53,737 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 157 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-11-02 20:47:53,738 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:47:53,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36689228] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:47:53,738 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:47:53,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-02 20:47:53,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497171228] [2022-11-02 20:47:53,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:47:53,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:47:53,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:47:53,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:47:53,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:47:53,745 INFO L87 Difference]: Start difference. First operand 85140 states and 94018 transitions. Second operand has 3 states, 3 states have (on average 86.66666666666667) internal successors, (260), 3 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:47:55,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:47:55,428 INFO L93 Difference]: Finished difference Result 185805 states and 205973 transitions. [2022-11-02 20:47:55,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:47:55,429 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 86.66666666666667) internal successors, (260), 3 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 294 [2022-11-02 20:47:55,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:47:55,925 INFO L225 Difference]: With dead ends: 185805 [2022-11-02 20:47:55,925 INFO L226 Difference]: Without dead ends: 101073 [2022-11-02 20:47:55,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 293 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:47:55,993 INFO L413 NwaCegarLoop]: 373 mSDtfsCounter, 209 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 699 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-02 20:47:55,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 396 Invalid, 771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 699 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-02 20:47:56,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101073 states. [2022-11-02 20:47:57,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101073 to 100980. [2022-11-02 20:47:57,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100980 states, 100979 states have (on average 1.10615078382634) internal successors, (111698), 100979 states have internal predecessors, (111698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:47:57,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100980 states to 100980 states and 111698 transitions. [2022-11-02 20:47:57,380 INFO L78 Accepts]: Start accepts. Automaton has 100980 states and 111698 transitions. Word has length 294 [2022-11-02 20:47:57,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:47:57,381 INFO L495 AbstractCegarLoop]: Abstraction has 100980 states and 111698 transitions. [2022-11-02 20:47:57,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.66666666666667) internal successors, (260), 3 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:47:57,381 INFO L276 IsEmpty]: Start isEmpty. Operand 100980 states and 111698 transitions. [2022-11-02 20:47:57,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2022-11-02 20:47:57,433 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:47:57,433 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:47:57,460 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ec21335-57e1-4eaa-bc8d-f6e3b0e13d84/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-02 20:47:57,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ec21335-57e1-4eaa-bc8d-f6e3b0e13d84/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:47:57,647 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:47:57,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:47:57,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1127773868, now seen corresponding path program 1 times [2022-11-02 20:47:57,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:47:57,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602090614] [2022-11-02 20:47:57,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:47:57,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:47:57,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:47:58,526 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 113 proven. 6 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-11-02 20:47:58,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:47:58,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602090614] [2022-11-02 20:47:58,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602090614] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:47:58,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719243627] [2022-11-02 20:47:58,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:47:58,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:47:58,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ec21335-57e1-4eaa-bc8d-f6e3b0e13d84/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:47:58,528 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ec21335-57e1-4eaa-bc8d-f6e3b0e13d84/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:47:58,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ec21335-57e1-4eaa-bc8d-f6e3b0e13d84/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-02 20:47:58,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:47:58,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 636 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-02 20:47:58,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:47:58,799 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 169 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-11-02 20:47:58,799 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:47:58,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719243627] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:47:58,800 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:47:58,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-02 20:47:58,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901448892] [2022-11-02 20:47:58,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:47:58,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:47:58,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:47:58,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:47:58,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:47:58,803 INFO L87 Difference]: Start difference. First operand 100980 states and 111698 transitions. Second operand has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:48:00,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:48:00,109 INFO L93 Difference]: Finished difference Result 228014 states and 253064 transitions. [2022-11-02 20:48:00,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:48:00,110 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 295 [2022-11-02 20:48:00,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:48:00,310 INFO L225 Difference]: With dead ends: 228014 [2022-11-02 20:48:00,311 INFO L226 Difference]: Without dead ends: 151653 [2022-11-02 20:48:00,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 294 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:48:00,345 INFO L413 NwaCegarLoop]: 611 mSDtfsCounter, 312 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 881 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:48:00,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [312 Valid, 881 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 20:48:00,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151653 states. [2022-11-02 20:48:02,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151653 to 148200. [2022-11-02 20:48:02,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148200 states, 148199 states have (on average 1.1025782900019567) internal successors, (163401), 148199 states have internal predecessors, (163401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:48:02,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148200 states to 148200 states and 163401 transitions. [2022-11-02 20:48:02,925 INFO L78 Accepts]: Start accepts. Automaton has 148200 states and 163401 transitions. Word has length 295 [2022-11-02 20:48:02,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:48:02,925 INFO L495 AbstractCegarLoop]: Abstraction has 148200 states and 163401 transitions. [2022-11-02 20:48:02,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:48:02,925 INFO L276 IsEmpty]: Start isEmpty. Operand 148200 states and 163401 transitions. [2022-11-02 20:48:02,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2022-11-02 20:48:02,998 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:48:02,998 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:48:03,024 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ec21335-57e1-4eaa-bc8d-f6e3b0e13d84/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-02 20:48:03,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ec21335-57e1-4eaa-bc8d-f6e3b0e13d84/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-02 20:48:03,200 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:48:03,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:48:03,200 INFO L85 PathProgramCache]: Analyzing trace with hash 358232874, now seen corresponding path program 1 times [2022-11-02 20:48:03,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:48:03,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544642465] [2022-11-02 20:48:03,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:48:03,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:48:03,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:04,050 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 127 proven. 6 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2022-11-02 20:48:04,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:48:04,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544642465] [2022-11-02 20:48:04,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544642465] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:48:04,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624621937] [2022-11-02 20:48:04,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:48:04,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:48:04,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ec21335-57e1-4eaa-bc8d-f6e3b0e13d84/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:48:04,063 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ec21335-57e1-4eaa-bc8d-f6e3b0e13d84/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:48:04,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ec21335-57e1-4eaa-bc8d-f6e3b0e13d84/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-02 20:48:04,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:04,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 665 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-02 20:48:04,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:48:04,718 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 158 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2022-11-02 20:48:04,718 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:48:04,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624621937] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:48:04,719 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:48:04,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-02 20:48:04,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954763323] [2022-11-02 20:48:04,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:48:04,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:48:04,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:48:04,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:48:04,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:48:04,721 INFO L87 Difference]: Start difference. First operand 148200 states and 163401 transitions. Second operand has 3 states, 3 states have (on average 78.66666666666667) internal successors, (236), 3 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:48:07,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:48:07,069 INFO L93 Difference]: Finished difference Result 306258 states and 338632 transitions. [2022-11-02 20:48:07,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:48:07,070 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 78.66666666666667) internal successors, (236), 3 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 304 [2022-11-02 20:48:07,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:48:07,333 INFO L225 Difference]: With dead ends: 306258 [2022-11-02 20:48:07,333 INFO L226 Difference]: Without dead ends: 161927 [2022-11-02 20:48:07,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 303 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:48:07,415 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 72 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-02 20:48:07,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 174 Invalid, 720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 629 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-02 20:48:07,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161927 states. [2022-11-02 20:48:10,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161927 to 156379. [2022-11-02 20:48:10,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156379 states, 156378 states have (on average 1.0972067682154778) internal successors, (171579), 156378 states have internal predecessors, (171579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:48:10,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156379 states to 156379 states and 171579 transitions. [2022-11-02 20:48:10,353 INFO L78 Accepts]: Start accepts. Automaton has 156379 states and 171579 transitions. Word has length 304 [2022-11-02 20:48:10,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:48:10,354 INFO L495 AbstractCegarLoop]: Abstraction has 156379 states and 171579 transitions. [2022-11-02 20:48:10,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.66666666666667) internal successors, (236), 3 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:48:10,354 INFO L276 IsEmpty]: Start isEmpty. Operand 156379 states and 171579 transitions. [2022-11-02 20:48:10,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2022-11-02 20:48:10,430 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:48:10,430 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:48:10,456 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ec21335-57e1-4eaa-bc8d-f6e3b0e13d84/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-02 20:48:10,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ec21335-57e1-4eaa-bc8d-f6e3b0e13d84/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-02 20:48:10,631 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:48:10,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:48:10,631 INFO L85 PathProgramCache]: Analyzing trace with hash -292542932, now seen corresponding path program 1 times [2022-11-02 20:48:10,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:48:10,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210225706] [2022-11-02 20:48:10,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:48:10,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:48:10,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:10,896 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-11-02 20:48:10,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:48:10,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210225706] [2022-11-02 20:48:10,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210225706] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:48:10,897 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:48:10,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:48:10,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842599604] [2022-11-02 20:48:10,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:48:10,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:48:10,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:48:10,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:48:10,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:48:10,899 INFO L87 Difference]: Start difference. First operand 156379 states and 171579 transitions. Second operand has 3 states, 3 states have (on average 91.33333333333333) internal successors, (274), 2 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:48:13,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:48:13,009 INFO L93 Difference]: Finished difference Result 319138 states and 350971 transitions. [2022-11-02 20:48:13,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:48:13,010 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 91.33333333333333) internal successors, (274), 2 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 311 [2022-11-02 20:48:13,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:48:13,229 INFO L225 Difference]: With dead ends: 319138 [2022-11-02 20:48:13,229 INFO L226 Difference]: Without dead ends: 185152 [2022-11-02 20:48:13,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:48:13,295 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 171 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 764 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:48:13,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 238 Invalid, 778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 764 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-02 20:48:13,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185152 states. [2022-11-02 20:48:16,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185152 to 167158. [2022-11-02 20:48:16,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167158 states, 167157 states have (on average 1.1017725850547688) internal successors, (184169), 167157 states have internal predecessors, (184169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:48:16,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167158 states to 167158 states and 184169 transitions. [2022-11-02 20:48:16,954 INFO L78 Accepts]: Start accepts. Automaton has 167158 states and 184169 transitions. Word has length 311 [2022-11-02 20:48:16,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:48:16,956 INFO L495 AbstractCegarLoop]: Abstraction has 167158 states and 184169 transitions. [2022-11-02 20:48:16,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.33333333333333) internal successors, (274), 2 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:48:16,958 INFO L276 IsEmpty]: Start isEmpty. Operand 167158 states and 184169 transitions. [2022-11-02 20:48:17,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2022-11-02 20:48:17,077 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:48:17,078 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:48:17,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-02 20:48:17,094 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:48:17,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:48:17,095 INFO L85 PathProgramCache]: Analyzing trace with hash -358082294, now seen corresponding path program 1 times [2022-11-02 20:48:17,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:48:17,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310624551] [2022-11-02 20:48:17,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:48:17,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:48:17,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:17,493 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 128 proven. 6 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2022-11-02 20:48:17,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:48:17,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310624551] [2022-11-02 20:48:17,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310624551] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:48:17,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150576227] [2022-11-02 20:48:17,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:48:17,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:48:17,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ec21335-57e1-4eaa-bc8d-f6e3b0e13d84/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:48:17,496 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ec21335-57e1-4eaa-bc8d-f6e3b0e13d84/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:48:17,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ec21335-57e1-4eaa-bc8d-f6e3b0e13d84/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-02 20:48:17,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:48:17,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 647 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-02 20:48:17,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:48:17,768 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 198 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-11-02 20:48:17,768 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:48:17,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150576227] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:48:17,769 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:48:17,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-02 20:48:17,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480118854] [2022-11-02 20:48:17,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:48:17,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:48:17,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:48:17,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:48:17,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:48:17,771 INFO L87 Difference]: Start difference. First operand 167158 states and 184169 transitions. Second operand has 3 states, 3 states have (on average 90.66666666666667) internal successors, (272), 3 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)