./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pals_lcr.4.ufo.BOUNDED-8.pals+Problem12_label03.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28654da2-603c-4ddc-b225-8ccac87a22fd/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28654da2-603c-4ddc-b225-8ccac87a22fd/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28654da2-603c-4ddc-b225-8ccac87a22fd/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28654da2-603c-4ddc-b225-8ccac87a22fd/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/pals_lcr.4.ufo.BOUNDED-8.pals+Problem12_label03.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28654da2-603c-4ddc-b225-8ccac87a22fd/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28654da2-603c-4ddc-b225-8ccac87a22fd/bin/uautomizer-DrprNOufMa --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 355322de5dcfb8cbd44ad690b6b14768d5a2fa38ff5dfd1ede94c260e278eb8b --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 18:50:25,077 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 18:50:25,079 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 18:50:25,111 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 18:50:25,111 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 18:50:25,112 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 18:50:25,113 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 18:50:25,115 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 18:50:25,117 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 18:50:25,117 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 18:50:25,118 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 18:50:25,119 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 18:50:25,120 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 18:50:25,121 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 18:50:25,122 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 18:50:25,123 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 18:50:25,124 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 18:50:25,125 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 18:50:25,126 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 18:50:25,128 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 18:50:25,130 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 18:50:25,131 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 18:50:25,132 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 18:50:25,133 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 18:50:25,136 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 18:50:25,136 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 18:50:25,137 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 18:50:25,138 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 18:50:25,138 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 18:50:25,139 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 18:50:25,139 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 18:50:25,140 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 18:50:25,141 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 18:50:25,141 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 18:50:25,142 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 18:50:25,142 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 18:50:25,143 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 18:50:25,143 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 18:50:25,143 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 18:50:25,144 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 18:50:25,145 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 18:50:25,145 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28654da2-603c-4ddc-b225-8ccac87a22fd/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 18:50:25,168 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 18:50:25,168 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 18:50:25,168 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 18:50:25,169 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 18:50:25,169 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 18:50:25,169 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 18:50:25,170 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 18:50:25,170 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 18:50:25,171 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 18:50:25,171 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 18:50:25,171 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 18:50:25,171 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 18:50:25,171 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 18:50:25,172 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 18:50:25,172 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 18:50:25,172 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 18:50:25,172 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 18:50:25,172 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 18:50:25,173 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 18:50:25,173 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 18:50:25,173 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 18:50:25,173 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 18:50:25,173 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 18:50:25,174 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 18:50:25,174 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 18:50:25,174 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 18:50:25,174 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 18:50:25,174 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 18:50:25,175 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 18:50:25,175 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 18:50:25,175 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 18:50:25,175 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 18:50:25,175 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 18:50:25,176 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 18:50:25,176 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_28654da2-603c-4ddc-b225-8ccac87a22fd/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28654da2-603c-4ddc-b225-8ccac87a22fd/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 355322de5dcfb8cbd44ad690b6b14768d5a2fa38ff5dfd1ede94c260e278eb8b [2021-12-06 18:50:25,371 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 18:50:25,386 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 18:50:25,388 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 18:50:25,389 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 18:50:25,389 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 18:50:25,390 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28654da2-603c-4ddc-b225-8ccac87a22fd/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/combinations/pals_lcr.4.ufo.BOUNDED-8.pals+Problem12_label03.c [2021-12-06 18:50:25,431 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28654da2-603c-4ddc-b225-8ccac87a22fd/bin/uautomizer-DrprNOufMa/data/9253db485/24f05950e68a4ad0890cd1b8afee79cb/FLAGbda784478 [2021-12-06 18:50:26,036 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 18:50:26,036 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28654da2-603c-4ddc-b225-8ccac87a22fd/sv-benchmarks/c/combinations/pals_lcr.4.ufo.BOUNDED-8.pals+Problem12_label03.c [2021-12-06 18:50:26,063 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28654da2-603c-4ddc-b225-8ccac87a22fd/bin/uautomizer-DrprNOufMa/data/9253db485/24f05950e68a4ad0890cd1b8afee79cb/FLAGbda784478 [2021-12-06 18:50:26,466 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28654da2-603c-4ddc-b225-8ccac87a22fd/bin/uautomizer-DrprNOufMa/data/9253db485/24f05950e68a4ad0890cd1b8afee79cb [2021-12-06 18:50:26,468 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 18:50:26,469 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 18:50:26,470 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 18:50:26,470 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 18:50:26,473 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 18:50:26,474 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 06:50:26" (1/1) ... [2021-12-06 18:50:26,475 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ddb0475 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:50:26, skipping insertion in model container [2021-12-06 18:50:26,475 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 06:50:26" (1/1) ... [2021-12-06 18:50:26,481 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 18:50:26,561 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 18:50:26,786 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_28654da2-603c-4ddc-b225-8ccac87a22fd/sv-benchmarks/c/combinations/pals_lcr.4.ufo.BOUNDED-8.pals+Problem12_label03.c[8616,8629] [2021-12-06 18:50:26,811 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_28654da2-603c-4ddc-b225-8ccac87a22fd/sv-benchmarks/c/combinations/pals_lcr.4.ufo.BOUNDED-8.pals+Problem12_label03.c[10953,10966] [2021-12-06 18:50:27,373 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 18:50:27,380 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 18:50:27,400 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_28654da2-603c-4ddc-b225-8ccac87a22fd/sv-benchmarks/c/combinations/pals_lcr.4.ufo.BOUNDED-8.pals+Problem12_label03.c[8616,8629] [2021-12-06 18:50:27,404 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_28654da2-603c-4ddc-b225-8ccac87a22fd/sv-benchmarks/c/combinations/pals_lcr.4.ufo.BOUNDED-8.pals+Problem12_label03.c[10953,10966] [2021-12-06 18:50:27,771 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 18:50:27,791 INFO L208 MainTranslator]: Completed translation [2021-12-06 18:50:27,791 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:50:27 WrapperNode [2021-12-06 18:50:27,791 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 18:50:27,792 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 18:50:27,792 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 18:50:27,792 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 18:50:27,797 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:50:27" (1/1) ... [2021-12-06 18:50:27,850 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:50:27" (1/1) ... [2021-12-06 18:50:28,069 INFO L137 Inliner]: procedures = 34, calls = 20, calls flagged for inlining = 15, calls inlined = 15, statements flattened = 5031 [2021-12-06 18:50:28,070 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 18:50:28,070 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 18:50:28,070 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 18:50:28,070 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 18:50:28,077 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:50:27" (1/1) ... [2021-12-06 18:50:28,077 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:50:27" (1/1) ... [2021-12-06 18:50:28,144 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:50:27" (1/1) ... [2021-12-06 18:50:28,144 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:50:27" (1/1) ... [2021-12-06 18:50:28,328 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:50:27" (1/1) ... [2021-12-06 18:50:28,351 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:50:27" (1/1) ... [2021-12-06 18:50:28,390 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:50:27" (1/1) ... [2021-12-06 18:50:28,443 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 18:50:28,444 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 18:50:28,444 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 18:50:28,444 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 18:50:28,445 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:50:27" (1/1) ... [2021-12-06 18:50:28,451 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 18:50:28,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28654da2-603c-4ddc-b225-8ccac87a22fd/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:50:28,471 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28654da2-603c-4ddc-b225-8ccac87a22fd/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 18:50:28,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28654da2-603c-4ddc-b225-8ccac87a22fd/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 18:50:28,509 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 18:50:28,509 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 18:50:28,510 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 18:50:28,510 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 18:50:28,579 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 18:50:28,580 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 18:50:31,332 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 18:50:31,351 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 18:50:31,352 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-06 18:50:31,355 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 06:50:31 BoogieIcfgContainer [2021-12-06 18:50:31,355 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 18:50:31,357 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 18:50:31,357 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 18:50:31,360 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 18:50:31,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 06:50:26" (1/3) ... [2021-12-06 18:50:31,361 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@788b4493 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 06:50:31, skipping insertion in model container [2021-12-06 18:50:31,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:50:27" (2/3) ... [2021-12-06 18:50:31,362 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@788b4493 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 06:50:31, skipping insertion in model container [2021-12-06 18:50:31,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 06:50:31" (3/3) ... [2021-12-06 18:50:31,363 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.ufo.BOUNDED-8.pals+Problem12_label03.c [2021-12-06 18:50:31,368 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 18:50:31,368 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-06 18:50:31,419 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 18:50:31,425 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-06 18:50:31,425 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-06 18:50:31,451 INFO L276 IsEmpty]: Start isEmpty. Operand has 893 states, 890 states have (on average 1.902247191011236) internal successors, (1693), 892 states have internal predecessors, (1693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:50:31,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-06 18:50:31,456 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:50:31,457 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:50:31,457 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:50:31,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:50:31,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1736774821, now seen corresponding path program 1 times [2021-12-06 18:50:31,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:50:31,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798870041] [2021-12-06 18:50:31,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:50:31,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:50:31,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:50:31,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:50:31,603 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:50:31,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798870041] [2021-12-06 18:50:31,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798870041] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:50:31,604 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:50:31,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 18:50:31,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769012817] [2021-12-06 18:50:31,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:50:31,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 18:50:31,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:50:31,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 18:50:31,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:50:31,643 INFO L87 Difference]: Start difference. First operand has 893 states, 890 states have (on average 1.902247191011236) internal successors, (1693), 892 states have internal predecessors, (1693), 0 states have call successors, (0), 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 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:50:34,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:50:34,331 INFO L93 Difference]: Finished difference Result 2528 states and 4850 transitions. [2021-12-06 18:50:34,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 18:50:34,333 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 0 states have call successors, (0), 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 20 [2021-12-06 18:50:34,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:50:34,352 INFO L225 Difference]: With dead ends: 2528 [2021-12-06 18:50:34,352 INFO L226 Difference]: Without dead ends: 1578 [2021-12-06 18:50:34,357 INFO L932 BasicCegarLoop]: 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 [2021-12-06 18:50:34,360 INFO L933 BasicCegarLoop]: 640 mSDtfsCounter, 925 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 2337 mSolverCounterSat, 696 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 925 SdHoareTripleChecker+Valid, 651 SdHoareTripleChecker+Invalid, 3033 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 696 IncrementalHoareTripleChecker+Valid, 2337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-06 18:50:34,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [925 Valid, 651 Invalid, 3033 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [696 Valid, 2337 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-06 18:50:34,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1578 states. [2021-12-06 18:50:34,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1578 to 1578. [2021-12-06 18:50:34,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1578 states, 1576 states have (on average 1.611040609137056) internal successors, (2539), 1577 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) [2021-12-06 18:50:34,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1578 states to 1578 states and 2539 transitions. [2021-12-06 18:50:34,445 INFO L78 Accepts]: Start accepts. Automaton has 1578 states and 2539 transitions. Word has length 20 [2021-12-06 18:50:34,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:50:34,445 INFO L470 AbstractCegarLoop]: Abstraction has 1578 states and 2539 transitions. [2021-12-06 18:50:34,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:50:34,446 INFO L276 IsEmpty]: Start isEmpty. Operand 1578 states and 2539 transitions. [2021-12-06 18:50:34,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-06 18:50:34,447 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:50:34,447 INFO L514 BasicCegarLoop]: 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] [2021-12-06 18:50:34,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 18:50:34,447 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:50:34,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:50:34,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1541863076, now seen corresponding path program 1 times [2021-12-06 18:50:34,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:50:34,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371741181] [2021-12-06 18:50:34,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:50:34,449 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:50:34,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:50:34,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:50:34,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:50:34,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371741181] [2021-12-06 18:50:34,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371741181] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:50:34,501 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:50:34,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 18:50:34,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799393664] [2021-12-06 18:50:34,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:50:34,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 18:50:34,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:50:34,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 18:50:34,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 18:50:34,504 INFO L87 Difference]: Start difference. First operand 1578 states and 2539 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:50:34,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:50:34,565 INFO L93 Difference]: Finished difference Result 1670 states and 2681 transitions. [2021-12-06 18:50:34,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 18:50:34,565 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 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 30 [2021-12-06 18:50:34,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:50:34,572 INFO L225 Difference]: With dead ends: 1670 [2021-12-06 18:50:34,573 INFO L226 Difference]: Without dead ends: 1622 [2021-12-06 18:50:34,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-06 18:50:34,575 INFO L933 BasicCegarLoop]: 1556 mSDtfsCounter, 71 mSDsluCounter, 4640 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 6196 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:50:34,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 6196 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:50:34,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1622 states. [2021-12-06 18:50:34,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1622 to 1578. [2021-12-06 18:50:34,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1578 states, 1576 states have (on average 1.5964467005076142) internal successors, (2516), 1577 states have internal predecessors, (2516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:50:34,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1578 states to 1578 states and 2516 transitions. [2021-12-06 18:50:34,611 INFO L78 Accepts]: Start accepts. Automaton has 1578 states and 2516 transitions. Word has length 30 [2021-12-06 18:50:34,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:50:34,611 INFO L470 AbstractCegarLoop]: Abstraction has 1578 states and 2516 transitions. [2021-12-06 18:50:34,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:50:34,612 INFO L276 IsEmpty]: Start isEmpty. Operand 1578 states and 2516 transitions. [2021-12-06 18:50:34,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-06 18:50:34,613 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:50:34,613 INFO L514 BasicCegarLoop]: 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] [2021-12-06 18:50:34,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 18:50:34,614 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:50:34,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:50:34,614 INFO L85 PathProgramCache]: Analyzing trace with hash 159296799, now seen corresponding path program 1 times [2021-12-06 18:50:34,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:50:34,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382831758] [2021-12-06 18:50:34,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:50:34,615 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:50:34,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:50:34,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:50:34,678 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:50:34,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382831758] [2021-12-06 18:50:34,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382831758] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:50:34,679 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:50:34,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 18:50:34,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193818148] [2021-12-06 18:50:34,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:50:34,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 18:50:34,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:50:34,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 18:50:34,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:50:34,680 INFO L87 Difference]: Start difference. First operand 1578 states and 2516 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:50:34,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:50:34,709 INFO L93 Difference]: Finished difference Result 1660 states and 2644 transitions. [2021-12-06 18:50:34,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 18:50:34,709 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 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 52 [2021-12-06 18:50:34,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:50:34,717 INFO L225 Difference]: With dead ends: 1660 [2021-12-06 18:50:34,717 INFO L226 Difference]: Without dead ends: 1616 [2021-12-06 18:50:34,718 INFO L932 BasicCegarLoop]: 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 [2021-12-06 18:50:34,719 INFO L933 BasicCegarLoop]: 1592 mSDtfsCounter, 1498 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1498 SdHoareTripleChecker+Valid, 1659 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:50:34,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1498 Valid, 1659 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:50:34,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1616 states. [2021-12-06 18:50:34,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1616 to 1614. [2021-12-06 18:50:34,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1614 states, 1612 states have (on average 1.5961538461538463) internal successors, (2573), 1613 states have internal predecessors, (2573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:50:34,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1614 states to 1614 states and 2573 transitions. [2021-12-06 18:50:34,755 INFO L78 Accepts]: Start accepts. Automaton has 1614 states and 2573 transitions. Word has length 52 [2021-12-06 18:50:34,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:50:34,756 INFO L470 AbstractCegarLoop]: Abstraction has 1614 states and 2573 transitions. [2021-12-06 18:50:34,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:50:34,756 INFO L276 IsEmpty]: Start isEmpty. Operand 1614 states and 2573 transitions. [2021-12-06 18:50:34,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-06 18:50:34,757 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:50:34,757 INFO L514 BasicCegarLoop]: 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] [2021-12-06 18:50:34,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 18:50:34,758 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:50:34,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:50:34,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1780734059, now seen corresponding path program 1 times [2021-12-06 18:50:34,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:50:34,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505174223] [2021-12-06 18:50:34,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:50:34,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:50:34,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:50:34,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:50:34,806 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:50:34,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505174223] [2021-12-06 18:50:34,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505174223] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:50:34,807 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:50:34,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 18:50:34,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022751603] [2021-12-06 18:50:34,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:50:34,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 18:50:34,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:50:34,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 18:50:34,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:50:34,808 INFO L87 Difference]: Start difference. First operand 1614 states and 2573 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:50:34,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:50:34,838 INFO L93 Difference]: Finished difference Result 1762 states and 2805 transitions. [2021-12-06 18:50:34,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 18:50:34,839 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 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 52 [2021-12-06 18:50:34,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:50:34,846 INFO L225 Difference]: With dead ends: 1762 [2021-12-06 18:50:34,846 INFO L226 Difference]: Without dead ends: 1682 [2021-12-06 18:50:34,847 INFO L932 BasicCegarLoop]: 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 [2021-12-06 18:50:34,848 INFO L933 BasicCegarLoop]: 1587 mSDtfsCounter, 1494 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1494 SdHoareTripleChecker+Valid, 1658 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:50:34,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1494 Valid, 1658 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:50:34,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1682 states. [2021-12-06 18:50:34,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1682 to 1680. [2021-12-06 18:50:34,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1680 states, 1678 states have (on average 1.594755661501788) internal successors, (2676), 1679 states have internal predecessors, (2676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:50:34,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1680 states to 1680 states and 2676 transitions. [2021-12-06 18:50:34,887 INFO L78 Accepts]: Start accepts. Automaton has 1680 states and 2676 transitions. Word has length 52 [2021-12-06 18:50:34,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:50:34,887 INFO L470 AbstractCegarLoop]: Abstraction has 1680 states and 2676 transitions. [2021-12-06 18:50:34,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:50:34,888 INFO L276 IsEmpty]: Start isEmpty. Operand 1680 states and 2676 transitions. [2021-12-06 18:50:34,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-06 18:50:34,889 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:50:34,889 INFO L514 BasicCegarLoop]: 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] [2021-12-06 18:50:34,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-06 18:50:34,889 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:50:34,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:50:34,890 INFO L85 PathProgramCache]: Analyzing trace with hash 919948555, now seen corresponding path program 1 times [2021-12-06 18:50:34,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:50:34,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670725395] [2021-12-06 18:50:34,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:50:34,890 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:50:34,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:50:34,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:50:34,930 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:50:34,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670725395] [2021-12-06 18:50:34,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670725395] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:50:34,930 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:50:34,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 18:50:34,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506444202] [2021-12-06 18:50:34,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:50:34,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 18:50:34,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:50:34,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 18:50:34,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:50:34,931 INFO L87 Difference]: Start difference. First operand 1680 states and 2676 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:50:34,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:50:34,963 INFO L93 Difference]: Finished difference Result 1948 states and 3094 transitions. [2021-12-06 18:50:34,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 18:50:34,964 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 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 52 [2021-12-06 18:50:34,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:50:34,972 INFO L225 Difference]: With dead ends: 1948 [2021-12-06 18:50:34,972 INFO L226 Difference]: Without dead ends: 1802 [2021-12-06 18:50:34,973 INFO L932 BasicCegarLoop]: 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 [2021-12-06 18:50:34,974 INFO L933 BasicCegarLoop]: 1582 mSDtfsCounter, 1490 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1490 SdHoareTripleChecker+Valid, 1657 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:50:34,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1490 Valid, 1657 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:50:34,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1802 states. [2021-12-06 18:50:35,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1802 to 1800. [2021-12-06 18:50:35,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1800 states, 1798 states have (on average 1.5906562847608454) internal successors, (2860), 1799 states have internal predecessors, (2860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:50:35,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1800 states to 1800 states and 2860 transitions. [2021-12-06 18:50:35,030 INFO L78 Accepts]: Start accepts. Automaton has 1800 states and 2860 transitions. Word has length 52 [2021-12-06 18:50:35,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:50:35,030 INFO L470 AbstractCegarLoop]: Abstraction has 1800 states and 2860 transitions. [2021-12-06 18:50:35,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:50:35,030 INFO L276 IsEmpty]: Start isEmpty. Operand 1800 states and 2860 transitions. [2021-12-06 18:50:35,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-06 18:50:35,031 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:50:35,031 INFO L514 BasicCegarLoop]: 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] [2021-12-06 18:50:35,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-06 18:50:35,032 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:50:35,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:50:35,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1515907135, now seen corresponding path program 1 times [2021-12-06 18:50:35,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:50:35,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696953891] [2021-12-06 18:50:35,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:50:35,033 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:50:35,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:50:35,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:50:35,072 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:50:35,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696953891] [2021-12-06 18:50:35,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696953891] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:50:35,073 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:50:35,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 18:50:35,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76905693] [2021-12-06 18:50:35,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:50:35,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 18:50:35,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:50:35,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 18:50:35,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:50:35,074 INFO L87 Difference]: Start difference. First operand 1800 states and 2860 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:50:35,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:50:35,115 INFO L93 Difference]: Finished difference Result 2284 states and 3606 transitions. [2021-12-06 18:50:35,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 18:50:35,115 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 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 52 [2021-12-06 18:50:35,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:50:35,124 INFO L225 Difference]: With dead ends: 2284 [2021-12-06 18:50:35,125 INFO L226 Difference]: Without dead ends: 2018 [2021-12-06 18:50:35,126 INFO L932 BasicCegarLoop]: 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 [2021-12-06 18:50:35,127 INFO L933 BasicCegarLoop]: 1577 mSDtfsCounter, 1486 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1486 SdHoareTripleChecker+Valid, 1656 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:50:35,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1486 Valid, 1656 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:50:35,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2018 states. [2021-12-06 18:50:35,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2018 to 2016. [2021-12-06 18:50:35,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2016 states, 2014 states have (on average 1.5809334657398213) internal successors, (3184), 2015 states have internal predecessors, (3184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:50:35,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2016 states to 2016 states and 3184 transitions. [2021-12-06 18:50:35,181 INFO L78 Accepts]: Start accepts. Automaton has 2016 states and 3184 transitions. Word has length 52 [2021-12-06 18:50:35,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:50:35,181 INFO L470 AbstractCegarLoop]: Abstraction has 2016 states and 3184 transitions. [2021-12-06 18:50:35,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:50:35,182 INFO L276 IsEmpty]: Start isEmpty. Operand 2016 states and 3184 transitions. [2021-12-06 18:50:35,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-06 18:50:35,182 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:50:35,182 INFO L514 BasicCegarLoop]: 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] [2021-12-06 18:50:35,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-06 18:50:35,183 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:50:35,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:50:35,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1924545907, now seen corresponding path program 1 times [2021-12-06 18:50:35,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:50:35,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652096652] [2021-12-06 18:50:35,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:50:35,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:50:35,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:50:35,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:50:35,234 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:50:35,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652096652] [2021-12-06 18:50:35,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652096652] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:50:35,234 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:50:35,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 18:50:35,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224075482] [2021-12-06 18:50:35,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:50:35,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 18:50:35,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:50:35,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 18:50:35,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 18:50:35,236 INFO L87 Difference]: Start difference. First operand 2016 states and 3184 transitions. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:50:35,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:50:35,452 INFO L93 Difference]: Finished difference Result 5872 states and 9080 transitions. [2021-12-06 18:50:35,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 18:50:35,453 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 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 52 [2021-12-06 18:50:35,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:50:35,476 INFO L225 Difference]: With dead ends: 5872 [2021-12-06 18:50:35,476 INFO L226 Difference]: Without dead ends: 5390 [2021-12-06 18:50:35,478 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-06 18:50:35,479 INFO L933 BasicCegarLoop]: 1531 mSDtfsCounter, 6521 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6521 SdHoareTripleChecker+Valid, 2068 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:50:35,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6521 Valid, 2068 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:50:35,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5390 states. [2021-12-06 18:50:35,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5390 to 2496. [2021-12-06 18:50:35,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2496 states, 2494 states have (on average 1.5589414595028068) internal successors, (3888), 2495 states have internal predecessors, (3888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:50:35,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2496 states to 2496 states and 3888 transitions. [2021-12-06 18:50:35,584 INFO L78 Accepts]: Start accepts. Automaton has 2496 states and 3888 transitions. Word has length 52 [2021-12-06 18:50:35,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:50:35,584 INFO L470 AbstractCegarLoop]: Abstraction has 2496 states and 3888 transitions. [2021-12-06 18:50:35,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:50:35,585 INFO L276 IsEmpty]: Start isEmpty. Operand 2496 states and 3888 transitions. [2021-12-06 18:50:35,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-06 18:50:35,585 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:50:35,585 INFO L514 BasicCegarLoop]: 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] [2021-12-06 18:50:35,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-06 18:50:35,586 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:50:35,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:50:35,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1236981091, now seen corresponding path program 1 times [2021-12-06 18:50:35,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:50:35,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438665840] [2021-12-06 18:50:35,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:50:35,587 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:50:35,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:50:35,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:50:35,616 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:50:35,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438665840] [2021-12-06 18:50:35,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438665840] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:50:35,617 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:50:35,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 18:50:35,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134624066] [2021-12-06 18:50:35,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:50:35,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 18:50:35,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:50:35,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 18:50:35,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:50:35,618 INFO L87 Difference]: Start difference. First operand 2496 states and 3888 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:50:35,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:50:35,683 INFO L93 Difference]: Finished difference Result 3902 states and 5988 transitions. [2021-12-06 18:50:35,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 18:50:35,684 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 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 54 [2021-12-06 18:50:35,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:50:35,696 INFO L225 Difference]: With dead ends: 3902 [2021-12-06 18:50:35,696 INFO L226 Difference]: Without dead ends: 2940 [2021-12-06 18:50:35,698 INFO L932 BasicCegarLoop]: 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 [2021-12-06 18:50:35,699 INFO L933 BasicCegarLoop]: 1559 mSDtfsCounter, 1478 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1478 SdHoareTripleChecker+Valid, 1623 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:50:35,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1478 Valid, 1623 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:50:35,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2940 states. [2021-12-06 18:50:35,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2940 to 2938. [2021-12-06 18:50:35,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2938 states, 2936 states have (on average 1.5401907356948228) internal successors, (4522), 2937 states have internal predecessors, (4522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:50:35,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 4522 transitions. [2021-12-06 18:50:35,777 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 4522 transitions. Word has length 54 [2021-12-06 18:50:35,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:50:35,778 INFO L470 AbstractCegarLoop]: Abstraction has 2938 states and 4522 transitions. [2021-12-06 18:50:35,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:50:35,778 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 4522 transitions. [2021-12-06 18:50:35,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-06 18:50:35,778 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:50:35,779 INFO L514 BasicCegarLoop]: 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] [2021-12-06 18:50:35,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-06 18:50:35,779 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:50:35,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:50:35,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1303474603, now seen corresponding path program 1 times [2021-12-06 18:50:35,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:50:35,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504963017] [2021-12-06 18:50:35,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:50:35,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:50:35,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:50:35,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:50:35,876 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:50:35,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504963017] [2021-12-06 18:50:35,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504963017] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:50:35,876 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:50:35,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 18:50:35,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499617037] [2021-12-06 18:50:35,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:50:35,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 18:50:35,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:50:35,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 18:50:35,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-06 18:50:35,878 INFO L87 Difference]: Start difference. First operand 2938 states and 4522 transitions. Second operand has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:50:36,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:50:36,052 INFO L93 Difference]: Finished difference Result 4342 states and 6596 transitions. [2021-12-06 18:50:36,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 18:50:36,052 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 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 54 [2021-12-06 18:50:36,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:50:36,068 INFO L225 Difference]: With dead ends: 4342 [2021-12-06 18:50:36,068 INFO L226 Difference]: Without dead ends: 2940 [2021-12-06 18:50:36,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-12-06 18:50:36,072 INFO L933 BasicCegarLoop]: 1531 mSDtfsCounter, 6036 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6036 SdHoareTripleChecker+Valid, 1726 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:50:36,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6036 Valid, 1726 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:50:36,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2940 states. [2021-12-06 18:50:36,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2940 to 2938. [2021-12-06 18:50:36,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2938 states, 2936 states have (on average 1.5320163487738419) internal successors, (4498), 2937 states have internal predecessors, (4498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:50:36,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 4498 transitions. [2021-12-06 18:50:36,191 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 4498 transitions. Word has length 54 [2021-12-06 18:50:36,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:50:36,192 INFO L470 AbstractCegarLoop]: Abstraction has 2938 states and 4498 transitions. [2021-12-06 18:50:36,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:50:36,192 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 4498 transitions. [2021-12-06 18:50:36,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-06 18:50:36,193 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:50:36,193 INFO L514 BasicCegarLoop]: 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] [2021-12-06 18:50:36,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-06 18:50:36,193 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:50:36,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:50:36,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1338283904, now seen corresponding path program 1 times [2021-12-06 18:50:36,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:50:36,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935256240] [2021-12-06 18:50:36,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:50:36,194 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:50:36,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:50:36,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:50:36,249 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:50:36,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935256240] [2021-12-06 18:50:36,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935256240] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:50:36,249 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:50:36,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 18:50:36,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749479735] [2021-12-06 18:50:36,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:50:36,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 18:50:36,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:50:36,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 18:50:36,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 18:50:36,250 INFO L87 Difference]: Start difference. First operand 2938 states and 4498 transitions. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:50:36,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:50:36,372 INFO L93 Difference]: Finished difference Result 4340 states and 6547 transitions. [2021-12-06 18:50:36,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 18:50:36,373 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 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 55 [2021-12-06 18:50:36,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:50:36,387 INFO L225 Difference]: With dead ends: 4340 [2021-12-06 18:50:36,388 INFO L226 Difference]: Without dead ends: 2938 [2021-12-06 18:50:36,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-06 18:50:36,391 INFO L933 BasicCegarLoop]: 1503 mSDtfsCounter, 4595 mSDsluCounter, 1474 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4595 SdHoareTripleChecker+Valid, 2977 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:50:36,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4595 Valid, 2977 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:50:36,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2938 states. [2021-12-06 18:50:36,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2938 to 2938. [2021-12-06 18:50:36,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2938 states, 2936 states have (on average 1.5238419618528611) internal successors, (4474), 2937 states have internal predecessors, (4474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:50:36,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 4474 transitions. [2021-12-06 18:50:36,474 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 4474 transitions. Word has length 55 [2021-12-06 18:50:36,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:50:36,474 INFO L470 AbstractCegarLoop]: Abstraction has 2938 states and 4474 transitions. [2021-12-06 18:50:36,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:50:36,474 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 4474 transitions. [2021-12-06 18:50:36,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-06 18:50:36,475 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:50:36,475 INFO L514 BasicCegarLoop]: 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] [2021-12-06 18:50:36,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-06 18:50:36,475 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:50:36,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:50:36,476 INFO L85 PathProgramCache]: Analyzing trace with hash 637219326, now seen corresponding path program 1 times [2021-12-06 18:50:36,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:50:36,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960590558] [2021-12-06 18:50:36,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:50:36,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:50:36,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:50:36,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:50:36,526 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:50:36,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960590558] [2021-12-06 18:50:36,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960590558] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:50:36,526 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:50:36,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 18:50:36,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804707863] [2021-12-06 18:50:36,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:50:36,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 18:50:36,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:50:36,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 18:50:36,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 18:50:36,528 INFO L87 Difference]: Start difference. First operand 2938 states and 4474 transitions. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:50:36,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:50:36,651 INFO L93 Difference]: Finished difference Result 4340 states and 6499 transitions. [2021-12-06 18:50:36,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 18:50:36,652 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 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 55 [2021-12-06 18:50:36,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:50:36,662 INFO L225 Difference]: With dead ends: 4340 [2021-12-06 18:50:36,662 INFO L226 Difference]: Without dead ends: 2938 [2021-12-06 18:50:36,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-06 18:50:36,665 INFO L933 BasicCegarLoop]: 1505 mSDtfsCounter, 4627 mSDsluCounter, 1477 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4627 SdHoareTripleChecker+Valid, 2982 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:50:36,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4627 Valid, 2982 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:50:36,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2938 states. [2021-12-06 18:50:36,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2938 to 2938. [2021-12-06 18:50:36,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2938 states, 2936 states have (on average 1.5156675749318802) internal successors, (4450), 2937 states have internal predecessors, (4450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:50:36,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 4450 transitions. [2021-12-06 18:50:36,750 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 4450 transitions. Word has length 55 [2021-12-06 18:50:36,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:50:36,750 INFO L470 AbstractCegarLoop]: Abstraction has 2938 states and 4450 transitions. [2021-12-06 18:50:36,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:50:36,750 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 4450 transitions. [2021-12-06 18:50:36,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-06 18:50:36,751 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:50:36,751 INFO L514 BasicCegarLoop]: 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] [2021-12-06 18:50:36,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-06 18:50:36,752 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:50:36,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:50:36,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1917083004, now seen corresponding path program 1 times [2021-12-06 18:50:36,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:50:36,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854380119] [2021-12-06 18:50:36,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:50:36,753 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:50:36,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:50:36,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:50:36,799 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:50:36,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854380119] [2021-12-06 18:50:36,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854380119] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:50:36,799 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:50:36,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 18:50:36,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531566496] [2021-12-06 18:50:36,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:50:36,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 18:50:36,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:50:36,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 18:50:36,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 18:50:36,800 INFO L87 Difference]: Start difference. First operand 2938 states and 4450 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:50:36,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:50:36,956 INFO L93 Difference]: Finished difference Result 4169 states and 6148 transitions. [2021-12-06 18:50:36,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 18:50:36,956 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 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 55 [2021-12-06 18:50:36,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:50:36,964 INFO L225 Difference]: With dead ends: 4169 [2021-12-06 18:50:36,964 INFO L226 Difference]: Without dead ends: 4167 [2021-12-06 18:50:36,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-06 18:50:36,967 INFO L933 BasicCegarLoop]: 1555 mSDtfsCounter, 172 mSDsluCounter, 4598 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 6153 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:50:36,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 6153 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:50:36,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4167 states. [2021-12-06 18:50:37,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4167 to 3034. [2021-12-06 18:50:37,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3034 states, 3032 states have (on average 1.4967018469656992) internal successors, (4538), 3033 states have internal predecessors, (4538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:50:37,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3034 states to 3034 states and 4538 transitions. [2021-12-06 18:50:37,064 INFO L78 Accepts]: Start accepts. Automaton has 3034 states and 4538 transitions. Word has length 55 [2021-12-06 18:50:37,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:50:37,064 INFO L470 AbstractCegarLoop]: Abstraction has 3034 states and 4538 transitions. [2021-12-06 18:50:37,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:50:37,064 INFO L276 IsEmpty]: Start isEmpty. Operand 3034 states and 4538 transitions. [2021-12-06 18:50:37,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-06 18:50:37,066 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:50:37,066 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:50:37,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-06 18:50:37,066 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:50:37,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:50:37,067 INFO L85 PathProgramCache]: Analyzing trace with hash -484645446, now seen corresponding path program 1 times [2021-12-06 18:50:37,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:50:37,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011451953] [2021-12-06 18:50:37,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:50:37,067 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:50:37,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:50:37,115 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 18:50:37,115 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:50:37,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011451953] [2021-12-06 18:50:37,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011451953] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:50:37,115 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:50:37,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 18:50:37,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681657630] [2021-12-06 18:50:37,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:50:37,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 18:50:37,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:50:37,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 18:50:37,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 18:50:37,117 INFO L87 Difference]: Start difference. First operand 3034 states and 4538 transitions. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:50:37,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:50:37,495 INFO L93 Difference]: Finished difference Result 9340 states and 13307 transitions. [2021-12-06 18:50:37,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 18:50:37,496 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 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 79 [2021-12-06 18:50:37,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:50:37,507 INFO L225 Difference]: With dead ends: 9340 [2021-12-06 18:50:37,507 INFO L226 Difference]: Without dead ends: 7842 [2021-12-06 18:50:37,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-06 18:50:37,511 INFO L933 BasicCegarLoop]: 1592 mSDtfsCounter, 4749 mSDsluCounter, 1748 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4749 SdHoareTripleChecker+Valid, 3340 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:50:37,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4749 Valid, 3340 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:50:37,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7842 states. [2021-12-06 18:50:37,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7842 to 4530. [2021-12-06 18:50:37,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4530 states, 4528 states have (on average 1.4580388692579505) internal successors, (6602), 4529 states have internal predecessors, (6602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:50:37,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4530 states to 4530 states and 6602 transitions. [2021-12-06 18:50:37,680 INFO L78 Accepts]: Start accepts. Automaton has 4530 states and 6602 transitions. Word has length 79 [2021-12-06 18:50:37,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:50:37,680 INFO L470 AbstractCegarLoop]: Abstraction has 4530 states and 6602 transitions. [2021-12-06 18:50:37,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:50:37,680 INFO L276 IsEmpty]: Start isEmpty. Operand 4530 states and 6602 transitions. [2021-12-06 18:50:37,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-06 18:50:37,682 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:50:37,682 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:50:37,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-06 18:50:37,683 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:50:37,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:50:37,683 INFO L85 PathProgramCache]: Analyzing trace with hash 2041539034, now seen corresponding path program 1 times [2021-12-06 18:50:37,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:50:37,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727442951] [2021-12-06 18:50:37,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:50:37,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:50:37,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:50:37,730 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 18:50:37,730 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:50:37,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727442951] [2021-12-06 18:50:37,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727442951] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:50:37,730 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:50:37,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 18:50:37,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780196592] [2021-12-06 18:50:37,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:50:37,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 18:50:37,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:50:37,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 18:50:37,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 18:50:37,732 INFO L87 Difference]: Start difference. First operand 4530 states and 6602 transitions. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:50:38,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:50:38,109 INFO L93 Difference]: Finished difference Result 10836 states and 15371 transitions. [2021-12-06 18:50:38,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 18:50:38,110 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 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 79 [2021-12-06 18:50:38,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:50:38,121 INFO L225 Difference]: With dead ends: 10836 [2021-12-06 18:50:38,121 INFO L226 Difference]: Without dead ends: 9338 [2021-12-06 18:50:38,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-06 18:50:38,124 INFO L933 BasicCegarLoop]: 1592 mSDtfsCounter, 4708 mSDsluCounter, 1774 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4708 SdHoareTripleChecker+Valid, 3366 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:50:38,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4708 Valid, 3366 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:50:38,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9338 states. [2021-12-06 18:50:38,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9338 to 6778. [2021-12-06 18:50:38,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6778 states, 6776 states have (on average 1.42827626918536) internal successors, (9678), 6777 states have internal predecessors, (9678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:50:38,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6778 states to 6778 states and 9678 transitions. [2021-12-06 18:50:38,398 INFO L78 Accepts]: Start accepts. Automaton has 6778 states and 9678 transitions. Word has length 79 [2021-12-06 18:50:38,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:50:38,399 INFO L470 AbstractCegarLoop]: Abstraction has 6778 states and 9678 transitions. [2021-12-06 18:50:38,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:50:38,399 INFO L276 IsEmpty]: Start isEmpty. Operand 6778 states and 9678 transitions. [2021-12-06 18:50:38,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-06 18:50:38,400 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:50:38,400 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:50:38,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-06 18:50:38,401 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:50:38,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:50:38,401 INFO L85 PathProgramCache]: Analyzing trace with hash -1121788422, now seen corresponding path program 1 times [2021-12-06 18:50:38,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:50:38,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838746000] [2021-12-06 18:50:38,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:50:38,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:50:38,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:50:38,445 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 18:50:38,446 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:50:38,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838746000] [2021-12-06 18:50:38,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838746000] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:50:38,446 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:50:38,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 18:50:38,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497559994] [2021-12-06 18:50:38,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:50:38,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 18:50:38,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:50:38,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 18:50:38,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 18:50:38,447 INFO L87 Difference]: Start difference. First operand 6778 states and 9678 transitions. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:50:38,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:50:38,879 INFO L93 Difference]: Finished difference Result 12332 states and 17435 transitions. [2021-12-06 18:50:38,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 18:50:38,880 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 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 79 [2021-12-06 18:50:38,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:50:38,889 INFO L225 Difference]: With dead ends: 12332 [2021-12-06 18:50:38,890 INFO L226 Difference]: Without dead ends: 10834 [2021-12-06 18:50:38,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-06 18:50:38,894 INFO L933 BasicCegarLoop]: 1593 mSDtfsCounter, 4738 mSDsluCounter, 1802 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4738 SdHoareTripleChecker+Valid, 3395 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:50:38,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4738 Valid, 3395 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:50:38,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10834 states. [2021-12-06 18:50:39,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10834 to 8274. [2021-12-06 18:50:39,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8274 states, 8272 states have (on average 1.4194874274661509) internal successors, (11742), 8273 states have internal predecessors, (11742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:50:39,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8274 states to 8274 states and 11742 transitions. [2021-12-06 18:50:39,242 INFO L78 Accepts]: Start accepts. Automaton has 8274 states and 11742 transitions. Word has length 79 [2021-12-06 18:50:39,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:50:39,242 INFO L470 AbstractCegarLoop]: Abstraction has 8274 states and 11742 transitions. [2021-12-06 18:50:39,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:50:39,243 INFO L276 IsEmpty]: Start isEmpty. Operand 8274 states and 11742 transitions. [2021-12-06 18:50:39,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-06 18:50:39,244 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:50:39,245 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:50:39,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-06 18:50:39,245 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:50:39,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:50:39,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1937719834, now seen corresponding path program 1 times [2021-12-06 18:50:39,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:50:39,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259730308] [2021-12-06 18:50:39,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:50:39,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:50:39,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:50:39,284 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 18:50:39,284 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:50:39,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259730308] [2021-12-06 18:50:39,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259730308] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:50:39,285 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:50:39,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 18:50:39,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687078608] [2021-12-06 18:50:39,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:50:39,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 18:50:39,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:50:39,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 18:50:39,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 18:50:39,286 INFO L87 Difference]: Start difference. First operand 8274 states and 11742 transitions. Second operand has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:50:39,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:50:39,763 INFO L93 Difference]: Finished difference Result 12948 states and 18299 transitions. [2021-12-06 18:50:39,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 18:50:39,763 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 0 states have call successors, (0), 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 79 [2021-12-06 18:50:39,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:50:39,772 INFO L225 Difference]: With dead ends: 12948 [2021-12-06 18:50:39,772 INFO L226 Difference]: Without dead ends: 11890 [2021-12-06 18:50:39,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-06 18:50:39,775 INFO L933 BasicCegarLoop]: 1590 mSDtfsCounter, 4737 mSDsluCounter, 1756 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4737 SdHoareTripleChecker+Valid, 3346 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:50:39,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4737 Valid, 3346 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:50:39,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11890 states. [2021-12-06 18:50:40,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11890 to 9330. [2021-12-06 18:50:40,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9330 states, 9328 states have (on average 1.4165951972555746) internal successors, (13214), 9329 states have internal predecessors, (13214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:50:40,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9330 states to 9330 states and 13214 transitions. [2021-12-06 18:50:40,207 INFO L78 Accepts]: Start accepts. Automaton has 9330 states and 13214 transitions. Word has length 79 [2021-12-06 18:50:40,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:50:40,207 INFO L470 AbstractCegarLoop]: Abstraction has 9330 states and 13214 transitions. [2021-12-06 18:50:40,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:50:40,208 INFO L276 IsEmpty]: Start isEmpty. Operand 9330 states and 13214 transitions. [2021-12-06 18:50:40,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-06 18:50:40,210 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:50:40,210 INFO L514 BasicCegarLoop]: 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] [2021-12-06 18:50:40,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-06 18:50:40,210 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:50:40,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:50:40,211 INFO L85 PathProgramCache]: Analyzing trace with hash -596667294, now seen corresponding path program 1 times [2021-12-06 18:50:40,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:50:40,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004582094] [2021-12-06 18:50:40,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:50:40,211 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:50:40,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:50:40,397 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:50:40,398 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:50:40,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004582094] [2021-12-06 18:50:40,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004582094] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:50:40,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525622632] [2021-12-06 18:50:40,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:50:40,398 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:50:40,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28654da2-603c-4ddc-b225-8ccac87a22fd/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:50:40,399 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28654da2-603c-4ddc-b225-8ccac87a22fd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:50:40,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28654da2-603c-4ddc-b225-8ccac87a22fd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 18:50:40,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:50:40,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-06 18:50:40,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:50:40,702 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:50:40,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:50:41,083 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:50:41,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525622632] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:50:41,084 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:50:41,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 6] total 23 [2021-12-06 18:50:41,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902459401] [2021-12-06 18:50:41,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:50:41,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-06 18:50:41,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:50:41,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-06 18:50:41,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-12-06 18:50:41,085 INFO L87 Difference]: Start difference. First operand 9330 states and 13214 transitions. Second operand has 23 states, 23 states have (on average 9.869565217391305) internal successors, (227), 23 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) [2021-12-06 18:50:56,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:50:56,920 INFO L93 Difference]: Finished difference Result 150816 states and 206638 transitions. [2021-12-06 18:50:56,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 258 states. [2021-12-06 18:50:56,921 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 9.869565217391305) internal successors, (227), 23 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 80 [2021-12-06 18:50:56,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:50:57,084 INFO L225 Difference]: With dead ends: 150816 [2021-12-06 18:50:57,085 INFO L226 Difference]: Without dead ends: 141762 [2021-12-06 18:50:57,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 427 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 276 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35111 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=9618, Invalid=67388, Unknown=0, NotChecked=0, Total=77006 [2021-12-06 18:50:57,134 INFO L933 BasicCegarLoop]: 1690 mSDtfsCounter, 25771 mSDsluCounter, 11026 mSDsCounter, 0 mSdLazyCounter, 4143 mSolverCounterSat, 813 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25771 SdHoareTripleChecker+Valid, 12716 SdHoareTripleChecker+Invalid, 4956 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 813 IncrementalHoareTripleChecker+Valid, 4143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-06 18:50:57,134 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25771 Valid, 12716 Invalid, 4956 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [813 Valid, 4143 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-06 18:50:57,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141762 states. [2021-12-06 18:51:01,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141762 to 73605. [2021-12-06 18:51:01,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73605 states, 73603 states have (on average 1.3628928168688776) internal successors, (100313), 73604 states have internal predecessors, (100313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:51:02,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73605 states to 73605 states and 100313 transitions. [2021-12-06 18:51:02,057 INFO L78 Accepts]: Start accepts. Automaton has 73605 states and 100313 transitions. Word has length 80 [2021-12-06 18:51:02,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:51:02,057 INFO L470 AbstractCegarLoop]: Abstraction has 73605 states and 100313 transitions. [2021-12-06 18:51:02,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 9.869565217391305) internal successors, (227), 23 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) [2021-12-06 18:51:02,057 INFO L276 IsEmpty]: Start isEmpty. Operand 73605 states and 100313 transitions. [2021-12-06 18:51:02,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-06 18:51:02,061 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:51:02,061 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:51:02,083 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28654da2-603c-4ddc-b225-8ccac87a22fd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 18:51:02,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28654da2-603c-4ddc-b225-8ccac87a22fd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-06 18:51:02,263 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:51:02,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:51:02,264 INFO L85 PathProgramCache]: Analyzing trace with hash 2064719954, now seen corresponding path program 1 times [2021-12-06 18:51:02,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:51:02,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840993076] [2021-12-06 18:51:02,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:51:02,266 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:51:02,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:51:02,388 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:51:02,388 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:51:02,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840993076] [2021-12-06 18:51:02,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840993076] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:51:02,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499979468] [2021-12-06 18:51:02,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:51:02,389 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:51:02,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28654da2-603c-4ddc-b225-8ccac87a22fd/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:51:02,390 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28654da2-603c-4ddc-b225-8ccac87a22fd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:51:02,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28654da2-603c-4ddc-b225-8ccac87a22fd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 18:51:02,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:51:02,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-06 18:51:02,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:51:02,934 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:51:02,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:51:03,349 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:51:03,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499979468] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:51:03,349 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:51:03,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2021-12-06 18:51:03,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029318266] [2021-12-06 18:51:03,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:51:03,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-06 18:51:03,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:51:03,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-06 18:51:03,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2021-12-06 18:51:03,351 INFO L87 Difference]: Start difference. First operand 73605 states and 100313 transitions. Second operand has 26 states, 26 states have (on average 7.884615384615385) internal successors, (205), 25 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:52:14,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:52:14,843 INFO L93 Difference]: Finished difference Result 976973 states and 1299031 transitions. [2021-12-06 18:52:14,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 183 states. [2021-12-06 18:52:14,844 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 7.884615384615385) internal successors, (205), 25 states have internal predecessors, (205), 0 states have call successors, (0), 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 81 [2021-12-06 18:52:14,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:52:16,365 INFO L225 Difference]: With dead ends: 976973 [2021-12-06 18:52:16,366 INFO L226 Difference]: Without dead ends: 904904 [2021-12-06 18:52:16,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16541 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=5806, Invalid=36836, Unknown=0, NotChecked=0, Total=42642 [2021-12-06 18:52:16,772 INFO L933 BasicCegarLoop]: 1674 mSDtfsCounter, 25510 mSDsluCounter, 11202 mSDsCounter, 0 mSdLazyCounter, 2584 mSolverCounterSat, 456 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25510 SdHoareTripleChecker+Valid, 12876 SdHoareTripleChecker+Invalid, 3040 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 456 IncrementalHoareTripleChecker+Valid, 2584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-06 18:52:16,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25510 Valid, 12876 Invalid, 3040 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [456 Valid, 2584 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-06 18:52:17,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904904 states. [2021-12-06 18:52:46,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904904 to 346386. [2021-12-06 18:52:46,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346386 states, 346384 states have (on average 1.35001039308975) internal successors, (467622), 346385 states have internal predecessors, (467622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:52:47,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346386 states to 346386 states and 467622 transitions. [2021-12-06 18:52:47,837 INFO L78 Accepts]: Start accepts. Automaton has 346386 states and 467622 transitions. Word has length 81 [2021-12-06 18:52:47,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:52:47,838 INFO L470 AbstractCegarLoop]: Abstraction has 346386 states and 467622 transitions. [2021-12-06 18:52:47,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 7.884615384615385) internal successors, (205), 25 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:52:47,838 INFO L276 IsEmpty]: Start isEmpty. Operand 346386 states and 467622 transitions. [2021-12-06 18:52:47,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-06 18:52:47,844 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:52:47,844 INFO L514 BasicCegarLoop]: 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] [2021-12-06 18:52:47,866 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28654da2-603c-4ddc-b225-8ccac87a22fd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 18:52:48,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28654da2-603c-4ddc-b225-8ccac87a22fd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-06 18:52:48,046 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:52:48,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:52:48,047 INFO L85 PathProgramCache]: Analyzing trace with hash 526176474, now seen corresponding path program 1 times [2021-12-06 18:52:48,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:52:48,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428285780] [2021-12-06 18:52:48,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:52:48,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:52:48,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:52:48,110 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:52:48,110 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:52:48,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428285780] [2021-12-06 18:52:48,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428285780] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:52:48,111 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:52:48,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 18:52:48,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356414180] [2021-12-06 18:52:48,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:52:48,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 18:52:48,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:52:48,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 18:52:48,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:52:48,113 INFO L87 Difference]: Start difference. First operand 346386 states and 467622 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:53:14,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:53:14,597 INFO L93 Difference]: Finished difference Result 691238 states and 932796 transitions. [2021-12-06 18:53:14,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 18:53:14,598 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-12-06 18:53:14,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:53:15,208 INFO L225 Difference]: With dead ends: 691238 [2021-12-06 18:53:15,208 INFO L226 Difference]: Without dead ends: 346388 [2021-12-06 18:53:15,367 INFO L932 BasicCegarLoop]: 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 [2021-12-06 18:53:15,367 INFO L933 BasicCegarLoop]: 1562 mSDtfsCounter, 37 mSDsluCounter, 1522 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 3084 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:53:15,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 3084 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:53:15,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346388 states. [2021-12-06 18:53:41,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346388 to 338898. [2021-12-06 18:53:41,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338898 states, 338896 states have (on average 1.3280239365469053) internal successors, (450062), 338897 states have internal predecessors, (450062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:53:42,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338898 states to 338898 states and 450062 transitions. [2021-12-06 18:53:42,283 INFO L78 Accepts]: Start accepts. Automaton has 338898 states and 450062 transitions. Word has length 81 [2021-12-06 18:53:42,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:53:42,283 INFO L470 AbstractCegarLoop]: Abstraction has 338898 states and 450062 transitions. [2021-12-06 18:53:42,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:53:42,284 INFO L276 IsEmpty]: Start isEmpty. Operand 338898 states and 450062 transitions. [2021-12-06 18:53:42,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-06 18:53:42,287 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:53:42,287 INFO L514 BasicCegarLoop]: 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] [2021-12-06 18:53:42,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-06 18:53:42,288 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:53:42,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:53:42,288 INFO L85 PathProgramCache]: Analyzing trace with hash 252488762, now seen corresponding path program 1 times [2021-12-06 18:53:42,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:53:42,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934433575] [2021-12-06 18:53:42,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:53:42,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:53:42,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:53:42,314 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:53:42,314 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:53:42,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934433575] [2021-12-06 18:53:42,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934433575] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:53:42,314 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:53:42,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 18:53:42,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447317528] [2021-12-06 18:53:42,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:53:42,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 18:53:42,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:53:42,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 18:53:42,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:53:42,315 INFO L87 Difference]: Start difference. First operand 338898 states and 450062 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:53:56,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:53:56,713 INFO L93 Difference]: Finished difference Result 527886 states and 699342 transitions. [2021-12-06 18:53:56,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 18:53:56,714 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-12-06 18:53:56,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:53:56,972 INFO L225 Difference]: With dead ends: 527886 [2021-12-06 18:53:56,972 INFO L226 Difference]: Without dead ends: 190524 [2021-12-06 18:53:57,113 INFO L932 BasicCegarLoop]: 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 [2021-12-06 18:53:57,114 INFO L933 BasicCegarLoop]: 1557 mSDtfsCounter, 30 mSDsluCounter, 1519 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 3076 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:53:57,115 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 3076 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:53:57,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190524 states. [2021-12-06 18:54:11,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190524 to 185194. [2021-12-06 18:54:11,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185194 states, 185192 states have (on average 1.2944187653894337) internal successors, (239716), 185193 states have internal predecessors, (239716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:54:11,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185194 states to 185194 states and 239716 transitions. [2021-12-06 18:54:11,578 INFO L78 Accepts]: Start accepts. Automaton has 185194 states and 239716 transitions. Word has length 81 [2021-12-06 18:54:11,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:54:11,578 INFO L470 AbstractCegarLoop]: Abstraction has 185194 states and 239716 transitions. [2021-12-06 18:54:11,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:54:11,578 INFO L276 IsEmpty]: Start isEmpty. Operand 185194 states and 239716 transitions. [2021-12-06 18:54:11,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-06 18:54:11,581 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:54:11,581 INFO L514 BasicCegarLoop]: 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] [2021-12-06 18:54:11,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-06 18:54:11,581 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:54:11,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:54:11,582 INFO L85 PathProgramCache]: Analyzing trace with hash 176324506, now seen corresponding path program 1 times [2021-12-06 18:54:11,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:54:11,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669991445] [2021-12-06 18:54:11,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:54:11,582 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:54:11,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:54:11,609 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:54:11,609 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:54:11,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669991445] [2021-12-06 18:54:11,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669991445] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:54:11,609 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:54:11,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 18:54:11,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111022318] [2021-12-06 18:54:11,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:54:11,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 18:54:11,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:54:11,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 18:54:11,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:54:11,610 INFO L87 Difference]: Start difference. First operand 185194 states and 239716 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:54:18,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:54:18,199 INFO L93 Difference]: Finished difference Result 266599 states and 344626 transitions. [2021-12-06 18:54:18,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 18:54:18,200 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-12-06 18:54:18,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:54:18,296 INFO L225 Difference]: With dead ends: 266599 [2021-12-06 18:54:18,296 INFO L226 Difference]: Without dead ends: 82941 [2021-12-06 18:54:18,369 INFO L932 BasicCegarLoop]: 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 [2021-12-06 18:54:18,370 INFO L933 BasicCegarLoop]: 1551 mSDtfsCounter, 24 mSDsluCounter, 1515 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 3066 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:54:18,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 3066 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:54:18,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82941 states. [2021-12-06 18:54:24,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82941 to 74347. [2021-12-06 18:54:24,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74347 states, 74345 states have (on average 1.2857488734951914) internal successors, (95589), 74346 states have internal predecessors, (95589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:54:24,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74347 states to 74347 states and 95589 transitions. [2021-12-06 18:54:24,156 INFO L78 Accepts]: Start accepts. Automaton has 74347 states and 95589 transitions. Word has length 81 [2021-12-06 18:54:24,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:54:24,156 INFO L470 AbstractCegarLoop]: Abstraction has 74347 states and 95589 transitions. [2021-12-06 18:54:24,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:54:24,156 INFO L276 IsEmpty]: Start isEmpty. Operand 74347 states and 95589 transitions. [2021-12-06 18:54:24,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-06 18:54:24,158 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:54:24,158 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:54:24,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-06 18:54:24,158 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:54:24,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:54:24,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1081869670, now seen corresponding path program 1 times [2021-12-06 18:54:24,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:54:24,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570153748] [2021-12-06 18:54:24,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:54:24,159 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:54:24,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:54:24,196 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 18:54:24,196 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:54:24,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570153748] [2021-12-06 18:54:24,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570153748] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:54:24,196 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:54:24,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 18:54:24,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702761658] [2021-12-06 18:54:24,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:54:24,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 18:54:24,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:54:24,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 18:54:24,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 18:54:24,197 INFO L87 Difference]: Start difference. First operand 74347 states and 95589 transitions. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:54:28,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:54:28,686 INFO L93 Difference]: Finished difference Result 129621 states and 166362 transitions. [2021-12-06 18:54:28,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 18:54:28,686 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 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 81 [2021-12-06 18:54:28,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:54:28,754 INFO L225 Difference]: With dead ends: 129621 [2021-12-06 18:54:28,755 INFO L226 Difference]: Without dead ends: 56927 [2021-12-06 18:54:28,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-06 18:54:28,790 INFO L933 BasicCegarLoop]: 1505 mSDtfsCounter, 4582 mSDsluCounter, 1482 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4582 SdHoareTripleChecker+Valid, 2987 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:54:28,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4582 Valid, 2987 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:54:28,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56927 states. [2021-12-06 18:54:33,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56927 to 56927. [2021-12-06 18:54:33,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56927 states, 56925 states have (on average 1.267193675889328) internal successors, (72135), 56926 states have internal predecessors, (72135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:54:33,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56927 states to 56927 states and 72135 transitions. [2021-12-06 18:54:33,404 INFO L78 Accepts]: Start accepts. Automaton has 56927 states and 72135 transitions. Word has length 81 [2021-12-06 18:54:33,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:54:33,404 INFO L470 AbstractCegarLoop]: Abstraction has 56927 states and 72135 transitions. [2021-12-06 18:54:33,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:54:33,404 INFO L276 IsEmpty]: Start isEmpty. Operand 56927 states and 72135 transitions. [2021-12-06 18:54:33,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-06 18:54:33,406 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:54:33,406 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:54:33,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-06 18:54:33,407 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:54:33,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:54:33,407 INFO L85 PathProgramCache]: Analyzing trace with hash -958775226, now seen corresponding path program 1 times [2021-12-06 18:54:33,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:54:33,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513262954] [2021-12-06 18:54:33,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:54:33,407 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:54:33,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:54:33,441 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-06 18:54:33,441 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:54:33,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513262954] [2021-12-06 18:54:33,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513262954] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:54:33,441 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:54:33,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 18:54:33,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391864712] [2021-12-06 18:54:33,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:54:33,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 18:54:33,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:54:33,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 18:54:33,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 18:54:33,442 INFO L87 Difference]: Start difference. First operand 56927 states and 72135 transitions. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 5 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:54:37,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:54:37,204 INFO L93 Difference]: Finished difference Result 100599 states and 127376 transitions. [2021-12-06 18:54:37,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 18:54:37,204 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 5 states have internal predecessors, (75), 0 states have call successors, (0), 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 81 [2021-12-06 18:54:37,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:54:37,250 INFO L225 Difference]: With dead ends: 100599 [2021-12-06 18:54:37,250 INFO L226 Difference]: Without dead ends: 45248 [2021-12-06 18:54:37,273 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-06 18:54:37,273 INFO L933 BasicCegarLoop]: 1505 mSDtfsCounter, 4637 mSDsluCounter, 1473 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4637 SdHoareTripleChecker+Valid, 2978 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:54:37,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4637 Valid, 2978 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:54:37,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45248 states. [2021-12-06 18:54:40,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45248 to 45248. [2021-12-06 18:54:40,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45248 states, 45246 states have (on average 1.2580117579454537) internal successors, (56920), 45247 states have internal predecessors, (56920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:54:41,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45248 states to 45248 states and 56920 transitions. [2021-12-06 18:54:41,004 INFO L78 Accepts]: Start accepts. Automaton has 45248 states and 56920 transitions. Word has length 81 [2021-12-06 18:54:41,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:54:41,004 INFO L470 AbstractCegarLoop]: Abstraction has 45248 states and 56920 transitions. [2021-12-06 18:54:41,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 5 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:54:41,004 INFO L276 IsEmpty]: Start isEmpty. Operand 45248 states and 56920 transitions. [2021-12-06 18:54:41,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-06 18:54:41,006 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:54:41,006 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:54:41,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-06 18:54:41,006 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:54:41,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:54:41,006 INFO L85 PathProgramCache]: Analyzing trace with hash 584192824, now seen corresponding path program 1 times [2021-12-06 18:54:41,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:54:41,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149020314] [2021-12-06 18:54:41,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:54:41,007 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:54:41,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:54:41,100 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:54:41,100 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:54:41,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149020314] [2021-12-06 18:54:41,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149020314] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:54:41,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432206210] [2021-12-06 18:54:41,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:54:41,100 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:54:41,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28654da2-603c-4ddc-b225-8ccac87a22fd/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:54:41,101 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28654da2-603c-4ddc-b225-8ccac87a22fd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:54:41,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28654da2-603c-4ddc-b225-8ccac87a22fd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 18:54:41,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:54:41,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-06 18:54:41,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:55:00,771 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:55:00,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:55:07,499 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:55:07,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432206210] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:55:07,499 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:55:07,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 27, 26] total 59 [2021-12-06 18:55:07,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959325657] [2021-12-06 18:55:07,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:55:07,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-12-06 18:55:07,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:55:07,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-12-06 18:55:07,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=424, Invalid=2996, Unknown=2, NotChecked=0, Total=3422 [2021-12-06 18:55:07,501 INFO L87 Difference]: Start difference. First operand 45248 states and 56920 transitions. Second operand has 59 states, 59 states have (on average 3.830508474576271) internal successors, (226), 59 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) [2021-12-06 18:55:27,324 WARN L227 SmtUtils]: Spent 5.83s on a formula simplification. DAG size of input: 260 DAG size of output: 182 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 18:56:41,114 WARN L227 SmtUtils]: Spent 6.19s on a formula simplification. DAG size of input: 254 DAG size of output: 174 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 19:00:05,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:00:05,316 INFO L93 Difference]: Finished difference Result 345039 states and 421427 transitions. [2021-12-06 19:00:05,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 614 states. [2021-12-06 19:00:05,317 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 3.830508474576271) internal successors, (226), 59 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 82 [2021-12-06 19:00:05,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:00:05,718 INFO L225 Difference]: With dead ends: 345039 [2021-12-06 19:00:05,718 INFO L226 Difference]: Without dead ends: 306190 [2021-12-06 19:00:05,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 788 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 664 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201733 ImplicationChecksByTransitivity, 254.3s TimeCoverageRelationStatistics Valid=43689, Invalid=399185, Unknown=16, NotChecked=0, Total=442890 [2021-12-06 19:00:05,806 INFO L933 BasicCegarLoop]: 1800 mSDtfsCounter, 34817 mSDsluCounter, 26497 mSDsCounter, 0 mSdLazyCounter, 10312 mSolverCounterSat, 1272 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34817 SdHoareTripleChecker+Valid, 28297 SdHoareTripleChecker+Invalid, 13057 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1272 IncrementalHoareTripleChecker+Valid, 10312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1473 IncrementalHoareTripleChecker+Unchecked, 17.5s IncrementalHoareTripleChecker+Time [2021-12-06 19:00:05,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34817 Valid, 28297 Invalid, 13057 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1272 Valid, 10312 Invalid, 0 Unknown, 1473 Unchecked, 17.5s Time] [2021-12-06 19:00:06,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306190 states. [2021-12-06 19:00:21,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306190 to 115008. [2021-12-06 19:00:21,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115008 states, 115006 states have (on average 1.2511347234057353) internal successors, (143888), 115007 states have internal predecessors, (143888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:00:21,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115008 states to 115008 states and 143888 transitions. [2021-12-06 19:00:21,240 INFO L78 Accepts]: Start accepts. Automaton has 115008 states and 143888 transitions. Word has length 82 [2021-12-06 19:00:21,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:00:21,240 INFO L470 AbstractCegarLoop]: Abstraction has 115008 states and 143888 transitions. [2021-12-06 19:00:21,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 3.830508474576271) internal successors, (226), 59 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) [2021-12-06 19:00:21,241 INFO L276 IsEmpty]: Start isEmpty. Operand 115008 states and 143888 transitions. [2021-12-06 19:00:21,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-06 19:00:21,242 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:00:21,242 INFO L514 BasicCegarLoop]: 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] [2021-12-06 19:00:21,264 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28654da2-603c-4ddc-b225-8ccac87a22fd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 19:00:21,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28654da2-603c-4ddc-b225-8ccac87a22fd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-12-06 19:00:21,444 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:00:21,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:00:21,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1788487180, now seen corresponding path program 1 times [2021-12-06 19:00:21,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:00:21,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261657782] [2021-12-06 19:00:21,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:00:21,446 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:00:21,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:00:21,506 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:00:21,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:00:21,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261657782] [2021-12-06 19:00:21,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261657782] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:00:21,507 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:00:21,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:00:21,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661417640] [2021-12-06 19:00:21,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:00:21,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:00:21,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:00:21,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:00:21,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:00:21,508 INFO L87 Difference]: Start difference. First operand 115008 states and 143888 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:00:28,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:00:28,382 INFO L93 Difference]: Finished difference Result 163893 states and 204193 transitions. [2021-12-06 19:00:28,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:00:28,383 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 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 82 [2021-12-06 19:00:28,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:00:28,441 INFO L225 Difference]: With dead ends: 163893 [2021-12-06 19:00:28,442 INFO L226 Difference]: Without dead ends: 54726 [2021-12-06 19:00:28,479 INFO L932 BasicCegarLoop]: 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 [2021-12-06 19:00:28,480 INFO L933 BasicCegarLoop]: 1544 mSDtfsCounter, 25 mSDsluCounter, 1496 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 3040 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:00:28,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 3040 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:00:28,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54726 states. [2021-12-06 19:00:35,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54726 to 54724. [2021-12-06 19:00:35,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54724 states, 54722 states have (on average 1.225229341032857) internal successors, (67047), 54723 states have internal predecessors, (67047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:00:35,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54724 states to 54724 states and 67047 transitions. [2021-12-06 19:00:35,232 INFO L78 Accepts]: Start accepts. Automaton has 54724 states and 67047 transitions. Word has length 82 [2021-12-06 19:00:35,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:00:35,232 INFO L470 AbstractCegarLoop]: Abstraction has 54724 states and 67047 transitions. [2021-12-06 19:00:35,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:00:35,232 INFO L276 IsEmpty]: Start isEmpty. Operand 54724 states and 67047 transitions. [2021-12-06 19:00:35,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-06 19:00:35,234 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:00:35,234 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:00:35,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-06 19:00:35,234 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:00:35,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:00:35,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1529807351, now seen corresponding path program 1 times [2021-12-06 19:00:35,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:00:35,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695029940] [2021-12-06 19:00:35,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:00:35,235 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:00:35,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:00:35,379 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:00:35,379 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:00:35,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695029940] [2021-12-06 19:00:35,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695029940] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:00:35,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973084683] [2021-12-06 19:00:35,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:00:35,380 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:00:35,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28654da2-603c-4ddc-b225-8ccac87a22fd/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:00:35,381 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28654da2-603c-4ddc-b225-8ccac87a22fd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:00:35,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28654da2-603c-4ddc-b225-8ccac87a22fd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 19:00:35,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:00:35,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-06 19:00:35,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:00:36,278 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:00:36,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:00:36,910 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:00:36,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973084683] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:00:36,910 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:00:36,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2021-12-06 19:00:36,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593258449] [2021-12-06 19:00:36,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:00:36,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-06 19:00:36,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:00:36,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-06 19:00:36,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-12-06 19:00:36,912 INFO L87 Difference]: Start difference. First operand 54724 states and 67047 transitions. Second operand has 21 states, 21 states have (on average 9.333333333333334) internal successors, (196), 20 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:00:49,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:00:49,206 INFO L93 Difference]: Finished difference Result 97635 states and 117626 transitions. [2021-12-06 19:00:49,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-06 19:00:49,207 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 9.333333333333334) internal successors, (196), 20 states have internal predecessors, (196), 0 states have call successors, (0), 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 83 [2021-12-06 19:00:49,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:00:49,297 INFO L225 Difference]: With dead ends: 97635 [2021-12-06 19:00:49,298 INFO L226 Difference]: Without dead ends: 87629 [2021-12-06 19:00:49,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 152 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=283, Invalid=839, Unknown=0, NotChecked=0, Total=1122 [2021-12-06 19:00:49,316 INFO L933 BasicCegarLoop]: 1528 mSDtfsCounter, 14040 mSDsluCounter, 4839 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14040 SdHoareTripleChecker+Valid, 6367 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 19:00:49,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14040 Valid, 6367 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 19:00:49,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87629 states. [2021-12-06 19:00:57,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87629 to 58191. [2021-12-06 19:00:57,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58191 states, 58189 states have (on average 1.2231177714000927) internal successors, (71172), 58190 states have internal predecessors, (71172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:00:57,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58191 states to 58191 states and 71172 transitions. [2021-12-06 19:00:57,100 INFO L78 Accepts]: Start accepts. Automaton has 58191 states and 71172 transitions. Word has length 83 [2021-12-06 19:00:57,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:00:57,101 INFO L470 AbstractCegarLoop]: Abstraction has 58191 states and 71172 transitions. [2021-12-06 19:00:57,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 9.333333333333334) internal successors, (196), 20 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:00:57,101 INFO L276 IsEmpty]: Start isEmpty. Operand 58191 states and 71172 transitions. [2021-12-06 19:00:57,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-06 19:00:57,102 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:00:57,102 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:00:57,122 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28654da2-603c-4ddc-b225-8ccac87a22fd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 19:00:57,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28654da2-603c-4ddc-b225-8ccac87a22fd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-06 19:00:57,304 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:00:57,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:00:57,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1782997605, now seen corresponding path program 1 times [2021-12-06 19:00:57,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:00:57,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664981771] [2021-12-06 19:00:57,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:00:57,306 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:00:57,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:00:57,709 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:00:57,709 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:00:57,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664981771] [2021-12-06 19:00:57,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664981771] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:00:57,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900606300] [2021-12-06 19:00:57,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:00:57,710 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:00:57,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28654da2-603c-4ddc-b225-8ccac87a22fd/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:00:57,711 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28654da2-603c-4ddc-b225-8ccac87a22fd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:00:57,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28654da2-603c-4ddc-b225-8ccac87a22fd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 19:00:57,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:00:57,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-06 19:00:57,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:00:58,913 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:00:58,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:00:59,864 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:00:59,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900606300] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:00:59,864 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:00:59,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 34 [2021-12-06 19:00:59,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236338205] [2021-12-06 19:00:59,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:00:59,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-06 19:00:59,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:00:59,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-06 19:00:59,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1015, Unknown=0, NotChecked=0, Total=1122 [2021-12-06 19:00:59,866 INFO L87 Difference]: Start difference. First operand 58191 states and 71172 transitions. Second operand has 34 states, 34 states have (on average 6.617647058823529) internal successors, (225), 34 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:01:37,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:01:37,270 INFO L93 Difference]: Finished difference Result 140529 states and 167138 transitions. [2021-12-06 19:01:37,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2021-12-06 19:01:37,270 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 6.617647058823529) internal successors, (225), 34 states have internal predecessors, (225), 0 states have call successors, (0), 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 83 [2021-12-06 19:01:37,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:01:37,399 INFO L225 Difference]: With dead ends: 140529 [2021-12-06 19:01:37,400 INFO L226 Difference]: Without dead ends: 113092 [2021-12-06 19:01:37,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9787 ImplicationChecksByTransitivity, 16.5s TimeCoverageRelationStatistics Valid=3662, Invalid=25068, Unknown=0, NotChecked=0, Total=28730 [2021-12-06 19:01:37,428 INFO L933 BasicCegarLoop]: 1712 mSDtfsCounter, 9176 mSDsluCounter, 28862 mSDsCounter, 0 mSdLazyCounter, 1991 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9176 SdHoareTripleChecker+Valid, 30574 SdHoareTripleChecker+Invalid, 2113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 1991 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-06 19:01:37,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9176 Valid, 30574 Invalid, 2113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 1991 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-06 19:01:37,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113092 states. [2021-12-06 19:01:44,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113092 to 43865. [2021-12-06 19:01:44,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43865 states, 43863 states have (on average 1.2218498506714086) internal successors, (53594), 43864 states have internal predecessors, (53594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:01:44,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43865 states to 43865 states and 53594 transitions. [2021-12-06 19:01:44,511 INFO L78 Accepts]: Start accepts. Automaton has 43865 states and 53594 transitions. Word has length 83 [2021-12-06 19:01:44,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:01:44,511 INFO L470 AbstractCegarLoop]: Abstraction has 43865 states and 53594 transitions. [2021-12-06 19:01:44,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 6.617647058823529) internal successors, (225), 34 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:01:44,511 INFO L276 IsEmpty]: Start isEmpty. Operand 43865 states and 53594 transitions. [2021-12-06 19:01:44,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-06 19:01:44,512 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:01:44,513 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:01:44,532 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28654da2-603c-4ddc-b225-8ccac87a22fd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 19:01:44,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28654da2-603c-4ddc-b225-8ccac87a22fd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:01:44,714 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:01:44,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:01:44,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1008179547, now seen corresponding path program 1 times [2021-12-06 19:01:44,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:01:44,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246113033] [2021-12-06 19:01:44,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:01:44,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:01:44,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:01:45,135 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:01:45,136 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:01:45,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246113033] [2021-12-06 19:01:45,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246113033] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:01:45,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252714423] [2021-12-06 19:01:45,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:01:45,136 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:01:45,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28654da2-603c-4ddc-b225-8ccac87a22fd/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:01:45,137 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28654da2-603c-4ddc-b225-8ccac87a22fd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:01:45,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28654da2-603c-4ddc-b225-8ccac87a22fd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 19:01:45,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:01:45,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-06 19:01:45,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:01:46,420 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:01:46,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:01:47,344 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:01:47,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252714423] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:01:47,344 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:01:47,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 32 [2021-12-06 19:01:47,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462905834] [2021-12-06 19:01:47,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:01:47,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-06 19:01:47,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:01:47,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-06 19:01:47,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=875, Unknown=0, NotChecked=0, Total=992 [2021-12-06 19:01:47,345 INFO L87 Difference]: Start difference. First operand 43865 states and 53594 transitions. Second operand has 32 states, 32 states have (on average 6.40625) internal successors, (205), 32 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:02:09,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:02:09,905 INFO L93 Difference]: Finished difference Result 130879 states and 161140 transitions. [2021-12-06 19:02:09,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-06 19:02:09,905 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 6.40625) internal successors, (205), 32 states have internal predecessors, (205), 0 states have call successors, (0), 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 83 [2021-12-06 19:02:09,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:02:10,035 INFO L225 Difference]: With dead ends: 130879 [2021-12-06 19:02:10,035 INFO L226 Difference]: Without dead ends: 113729 [2021-12-06 19:02:10,059 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 146 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 829 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=775, Invalid=2885, Unknown=0, NotChecked=0, Total=3660 [2021-12-06 19:02:10,060 INFO L933 BasicCegarLoop]: 1637 mSDtfsCounter, 15062 mSDsluCounter, 16129 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15062 SdHoareTripleChecker+Valid, 17766 SdHoareTripleChecker+Invalid, 526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 19:02:10,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15062 Valid, 17766 Invalid, 526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 420 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 19:02:10,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113729 states. [2021-12-06 19:02:16,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113729 to 33842. [2021-12-06 19:02:16,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33842 states, 33840 states have (on average 1.2228427895981087) internal successors, (41381), 33841 states have internal predecessors, (41381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:02:16,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33842 states to 33842 states and 41381 transitions. [2021-12-06 19:02:16,308 INFO L78 Accepts]: Start accepts. Automaton has 33842 states and 41381 transitions. Word has length 83 [2021-12-06 19:02:16,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:02:16,309 INFO L470 AbstractCegarLoop]: Abstraction has 33842 states and 41381 transitions. [2021-12-06 19:02:16,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 6.40625) internal successors, (205), 32 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:02:16,309 INFO L276 IsEmpty]: Start isEmpty. Operand 33842 states and 41381 transitions. [2021-12-06 19:02:16,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-06 19:02:16,310 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:02:16,310 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:02:16,334 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28654da2-603c-4ddc-b225-8ccac87a22fd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 19:02:16,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28654da2-603c-4ddc-b225-8ccac87a22fd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:02:16,511 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:02:16,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:02:16,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1215076864, now seen corresponding path program 1 times [2021-12-06 19:02:16,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:02:16,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527378969] [2021-12-06 19:02:16,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:02:16,514 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:02:16,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:02:16,971 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:02:16,971 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:02:16,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527378969] [2021-12-06 19:02:16,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527378969] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:02:16,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524072927] [2021-12-06 19:02:16,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:02:16,971 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:02:16,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28654da2-603c-4ddc-b225-8ccac87a22fd/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:02:16,972 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28654da2-603c-4ddc-b225-8ccac87a22fd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:02:16,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28654da2-603c-4ddc-b225-8ccac87a22fd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 19:02:17,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:02:17,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-06 19:02:17,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:02:19,080 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:02:19,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:02:21,333 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:02:21,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524072927] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:02:21,333 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:02:21,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 16] total 40 [2021-12-06 19:02:21,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385830413] [2021-12-06 19:02:21,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:02:21,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-06 19:02:21,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:02:21,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-06 19:02:21,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1385, Unknown=0, NotChecked=0, Total=1560 [2021-12-06 19:02:21,334 INFO L87 Difference]: Start difference. First operand 33842 states and 41381 transitions. Second operand has 40 states, 40 states have (on average 5.125) internal successors, (205), 40 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:02:44,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:02:44,561 INFO L93 Difference]: Finished difference Result 89486 states and 109448 transitions. [2021-12-06 19:02:44,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-12-06 19:02:44,562 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 5.125) internal successors, (205), 40 states have internal predecessors, (205), 0 states have call successors, (0), 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 84 [2021-12-06 19:02:44,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:02:44,640 INFO L225 Difference]: With dead ends: 89486 [2021-12-06 19:02:44,640 INFO L226 Difference]: Without dead ends: 74330 [2021-12-06 19:02:44,658 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1943 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=1647, Invalid=7283, Unknown=0, NotChecked=0, Total=8930 [2021-12-06 19:02:44,658 INFO L933 BasicCegarLoop]: 1768 mSDtfsCounter, 19378 mSDsluCounter, 27946 mSDsCounter, 0 mSdLazyCounter, 1578 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19378 SdHoareTripleChecker+Valid, 29714 SdHoareTripleChecker+Invalid, 1693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 1578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-06 19:02:44,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19378 Valid, 29714 Invalid, 1693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 1578 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-06 19:02:44,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74330 states. [2021-12-06 19:02:50,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74330 to 27929. [2021-12-06 19:02:50,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27929 states, 27927 states have (on average 1.2235829125935476) internal successors, (34171), 27928 states have internal predecessors, (34171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:02:50,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27929 states to 27929 states and 34171 transitions. [2021-12-06 19:02:50,090 INFO L78 Accepts]: Start accepts. Automaton has 27929 states and 34171 transitions. Word has length 84 [2021-12-06 19:02:50,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:02:50,090 INFO L470 AbstractCegarLoop]: Abstraction has 27929 states and 34171 transitions. [2021-12-06 19:02:50,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 5.125) internal successors, (205), 40 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:02:50,090 INFO L276 IsEmpty]: Start isEmpty. Operand 27929 states and 34171 transitions. [2021-12-06 19:02:50,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-06 19:02:50,091 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:02:50,091 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-06 19:02:50,111 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28654da2-603c-4ddc-b225-8ccac87a22fd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-06 19:02:50,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_28654da2-603c-4ddc-b225-8ccac87a22fd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-12-06 19:02:50,293 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:02:50,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:02:50,294 INFO L85 PathProgramCache]: Analyzing trace with hash 337645007, now seen corresponding path program 1 times [2021-12-06 19:02:50,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:02:50,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899130062] [2021-12-06 19:02:50,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:02:50,295 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:02:50,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:02:50,358 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:02:50,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:02:50,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899130062] [2021-12-06 19:02:50,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899130062] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:02:50,359 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:02:50,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 19:02:50,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444769054] [2021-12-06 19:02:50,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:02:50,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:02:50,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:02:50,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:02:50,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:02:50,360 INFO L87 Difference]: Start difference. First operand 27929 states and 34171 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)