./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/byte_add_1-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/config/AutomizerReach.xml -i ../../sv-benchmarks/c/bitvector/byte_add_1-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0 --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 0ba3e3db8f44a5e9ad151b8422bee8deebac1dcf47a42cba5485daeafd8d8e80 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-22 14:30:59,060 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-22 14:30:59,062 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-22 14:30:59,120 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-22 14:30:59,120 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-22 14:30:59,122 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-22 14:30:59,123 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-22 14:30:59,126 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-22 14:30:59,128 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-22 14:30:59,130 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-22 14:30:59,131 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-22 14:30:59,132 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-22 14:30:59,133 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-22 14:30:59,134 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-22 14:30:59,136 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-22 14:30:59,138 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-22 14:30:59,139 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-22 14:30:59,140 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-22 14:30:59,143 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-22 14:30:59,150 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-22 14:30:59,155 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-22 14:30:59,156 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-22 14:30:59,159 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-22 14:30:59,164 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-22 14:30:59,168 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-22 14:30:59,171 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-22 14:30:59,172 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-22 14:30:59,173 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-22 14:30:59,174 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-22 14:30:59,176 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-22 14:30:59,177 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-22 14:30:59,178 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-22 14:30:59,181 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-22 14:30:59,182 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-22 14:30:59,184 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-22 14:30:59,184 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-22 14:30:59,185 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-22 14:30:59,185 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-22 14:30:59,185 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-22 14:30:59,186 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-22 14:30:59,188 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-22 14:30:59,189 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-22 14:30:59,235 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-22 14:30:59,235 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-22 14:30:59,236 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-22 14:30:59,236 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-22 14:30:59,238 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-22 14:30:59,238 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-22 14:30:59,238 INFO L138 SettingsManager]: * Use SBE=true [2021-11-22 14:30:59,239 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-22 14:30:59,239 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-22 14:30:59,239 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-22 14:30:59,240 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-22 14:30:59,241 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-22 14:30:59,241 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-22 14:30:59,241 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-22 14:30:59,241 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-22 14:30:59,242 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-22 14:30:59,242 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-22 14:30:59,242 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-22 14:30:59,242 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-22 14:30:59,243 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-22 14:30:59,243 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-22 14:30:59,243 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-22 14:30:59,243 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 14:30:59,244 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-22 14:30:59,244 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-22 14:30:59,244 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-22 14:30:59,244 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-22 14:30:59,245 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-22 14:30:59,245 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-22 14:30:59,246 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-22 14:30:59,247 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-22 14:30:59,247 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-22 14:30:59,247 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_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0ba3e3db8f44a5e9ad151b8422bee8deebac1dcf47a42cba5485daeafd8d8e80 [2021-11-22 14:30:59,528 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-22 14:30:59,557 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-22 14:30:59,562 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-22 14:30:59,564 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-22 14:30:59,565 INFO L275 PluginConnector]: CDTParser initialized [2021-11-22 14:30:59,566 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/../../sv-benchmarks/c/bitvector/byte_add_1-1.i [2021-11-22 14:30:59,653 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/data/f74ec2ca1/0bb66b97b1b040f180bc5e5b0a710423/FLAGc892b19ac [2021-11-22 14:31:00,134 INFO L306 CDTParser]: Found 1 translation units. [2021-11-22 14:31:00,135 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/sv-benchmarks/c/bitvector/byte_add_1-1.i [2021-11-22 14:31:00,153 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/data/f74ec2ca1/0bb66b97b1b040f180bc5e5b0a710423/FLAGc892b19ac [2021-11-22 14:31:00,475 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/data/f74ec2ca1/0bb66b97b1b040f180bc5e5b0a710423 [2021-11-22 14:31:00,477 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-22 14:31:00,478 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-22 14:31:00,480 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-22 14:31:00,480 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-22 14:31:00,483 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-22 14:31:00,484 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:31:00" (1/1) ... [2021-11-22 14:31:00,485 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@249703d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:31:00, skipping insertion in model container [2021-11-22 14:31:00,485 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:31:00" (1/1) ... [2021-11-22 14:31:00,492 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-22 14:31:00,512 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-22 14:31:00,695 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_5b3b118f-3294-4789-99f4-6fca45618ad6/sv-benchmarks/c/bitvector/byte_add_1-1.i[1168,1181] [2021-11-22 14:31:00,770 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 14:31:00,779 INFO L203 MainTranslator]: Completed pre-run [2021-11-22 14:31:00,791 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_5b3b118f-3294-4789-99f4-6fca45618ad6/sv-benchmarks/c/bitvector/byte_add_1-1.i[1168,1181] [2021-11-22 14:31:00,812 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 14:31:00,825 INFO L208 MainTranslator]: Completed translation [2021-11-22 14:31:00,825 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:31:00 WrapperNode [2021-11-22 14:31:00,826 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-22 14:31:00,827 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-22 14:31:00,827 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-22 14:31:00,827 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-22 14:31:00,835 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:31:00" (1/1) ... [2021-11-22 14:31:00,842 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:31:00" (1/1) ... [2021-11-22 14:31:00,866 INFO L137 Inliner]: procedures = 16, calls = 8, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 123 [2021-11-22 14:31:00,866 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-22 14:31:00,867 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-22 14:31:00,867 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-22 14:31:00,867 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-22 14:31:00,876 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:31:00" (1/1) ... [2021-11-22 14:31:00,876 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:31:00" (1/1) ... [2021-11-22 14:31:00,878 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:31:00" (1/1) ... [2021-11-22 14:31:00,879 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:31:00" (1/1) ... [2021-11-22 14:31:00,884 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:31:00" (1/1) ... [2021-11-22 14:31:00,899 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:31:00" (1/1) ... [2021-11-22 14:31:00,901 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:31:00" (1/1) ... [2021-11-22 14:31:00,904 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-22 14:31:00,905 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-22 14:31:00,905 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-22 14:31:00,905 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-22 14:31:00,916 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:31:00" (1/1) ... [2021-11-22 14:31:00,923 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 14:31:00,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:31:00,960 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-22 14:31:00,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-22 14:31:00,999 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-22 14:31:00,999 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-22 14:31:00,999 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-22 14:31:00,999 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-22 14:31:01,069 INFO L236 CfgBuilder]: Building ICFG [2021-11-22 14:31:01,071 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-22 14:31:01,367 INFO L277 CfgBuilder]: Performing block encoding [2021-11-22 14:31:01,374 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-22 14:31:01,375 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-22 14:31:01,377 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:31:01 BoogieIcfgContainer [2021-11-22 14:31:01,377 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-22 14:31:01,379 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-22 14:31:01,379 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-22 14:31:01,406 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-22 14:31:01,406 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 02:31:00" (1/3) ... [2021-11-22 14:31:01,407 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d402a29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:31:01, skipping insertion in model container [2021-11-22 14:31:01,407 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:31:00" (2/3) ... [2021-11-22 14:31:01,408 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d402a29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:31:01, skipping insertion in model container [2021-11-22 14:31:01,408 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:31:01" (3/3) ... [2021-11-22 14:31:01,409 INFO L111 eAbstractionObserver]: Analyzing ICFG byte_add_1-1.i [2021-11-22 14:31:01,415 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-22 14:31:01,415 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-22 14:31:01,513 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-22 14:31:01,545 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 [2021-11-22 14:31:01,545 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-22 14:31:01,571 INFO L276 IsEmpty]: Start isEmpty. Operand has 42 states, 40 states have (on average 1.775) internal successors, (71), 41 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:01,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-22 14:31:01,577 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:31:01,578 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:31:01,579 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:31:01,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:31:01,589 INFO L85 PathProgramCache]: Analyzing trace with hash 255061167, now seen corresponding path program 1 times [2021-11-22 14:31:01,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:31:01,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531836429] [2021-11-22 14:31:01,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:31:01,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:31:01,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:31:01,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:31:01,820 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:31:01,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531836429] [2021-11-22 14:31:01,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531836429] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:31:01,823 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:31:01,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-22 14:31:01,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678443985] [2021-11-22 14:31:01,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:31:01,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-22 14:31:01,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:31:01,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-22 14:31:01,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-22 14:31:01,879 INFO L87 Difference]: Start difference. First operand has 42 states, 40 states have (on average 1.775) internal successors, (71), 41 states have internal predecessors, (71), 0 states have call successors, (0), 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 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:01,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:31:01,907 INFO L93 Difference]: Finished difference Result 57 states and 92 transitions. [2021-11-22 14:31:01,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-22 14:31:01,910 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 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 12 [2021-11-22 14:31:01,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:31:01,921 INFO L225 Difference]: With dead ends: 57 [2021-11-22 14:31:01,922 INFO L226 Difference]: Without dead ends: 38 [2021-11-22 14:31:01,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-22 14:31:01,932 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 14:31:01,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 14:31:01,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-22 14:31:01,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-11-22 14:31:01,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.7297297297297298) internal successors, (64), 37 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:01,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 64 transitions. [2021-11-22 14:31:01,990 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 64 transitions. Word has length 12 [2021-11-22 14:31:01,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:31:01,991 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 64 transitions. [2021-11-22 14:31:01,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:01,991 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 64 transitions. [2021-11-22 14:31:01,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-22 14:31:01,994 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:31:01,994 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:31:01,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-22 14:31:01,995 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:31:01,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:31:02,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1803477009, now seen corresponding path program 1 times [2021-11-22 14:31:02,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:31:02,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316530241] [2021-11-22 14:31:02,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:31:02,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:31:02,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:31:02,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:31:02,184 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:31:02,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316530241] [2021-11-22 14:31:02,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316530241] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:31:02,185 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:31:02,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 14:31:02,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92842269] [2021-11-22 14:31:02,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:31:02,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 14:31:02,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:31:02,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 14:31:02,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:31:02,197 INFO L87 Difference]: Start difference. First operand 38 states and 64 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:02,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:31:02,402 INFO L93 Difference]: Finished difference Result 89 states and 156 transitions. [2021-11-22 14:31:02,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 14:31:02,402 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 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 12 [2021-11-22 14:31:02,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:31:02,408 INFO L225 Difference]: With dead ends: 89 [2021-11-22 14:31:02,408 INFO L226 Difference]: Without dead ends: 61 [2021-11-22 14:31:02,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:31:02,416 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 24 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 14:31:02,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 59 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-22 14:31:02,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-11-22 14:31:02,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2021-11-22 14:31:02,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.5344827586206897) internal successors, (89), 58 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:02,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 89 transitions. [2021-11-22 14:31:02,427 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 89 transitions. Word has length 12 [2021-11-22 14:31:02,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:31:02,428 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 89 transitions. [2021-11-22 14:31:02,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:02,428 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 89 transitions. [2021-11-22 14:31:02,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-22 14:31:02,429 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:31:02,430 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:31:02,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-22 14:31:02,430 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:31:02,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:31:02,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1336656122, now seen corresponding path program 1 times [2021-11-22 14:31:02,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:31:02,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931112] [2021-11-22 14:31:02,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:31:02,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:31:02,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:31:02,626 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 14:31:02,627 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:31:02,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931112] [2021-11-22 14:31:02,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931112] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:31:02,629 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:31:02,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-22 14:31:02,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631227307] [2021-11-22 14:31:02,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:31:02,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 14:31:02,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:31:02,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 14:31:02,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 14:31:02,633 INFO L87 Difference]: Start difference. First operand 59 states and 89 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:02,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:31:02,891 INFO L93 Difference]: Finished difference Result 143 states and 218 transitions. [2021-11-22 14:31:02,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 14:31:02,892 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 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 18 [2021-11-22 14:31:02,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:31:02,893 INFO L225 Difference]: With dead ends: 143 [2021-11-22 14:31:02,893 INFO L226 Difference]: Without dead ends: 105 [2021-11-22 14:31:02,894 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-22 14:31:02,895 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 85 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 14:31:02,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 156 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-22 14:31:02,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-11-22 14:31:02,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 67. [2021-11-22 14:31:02,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.4848484848484849) internal successors, (98), 66 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:02,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 98 transitions. [2021-11-22 14:31:02,906 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 98 transitions. Word has length 18 [2021-11-22 14:31:02,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:31:02,907 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 98 transitions. [2021-11-22 14:31:02,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:02,907 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 98 transitions. [2021-11-22 14:31:02,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-22 14:31:02,908 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:31:02,908 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:31:02,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-22 14:31:02,909 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:31:02,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:31:02,909 INFO L85 PathProgramCache]: Analyzing trace with hash -640429161, now seen corresponding path program 1 times [2021-11-22 14:31:02,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:31:02,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130333115] [2021-11-22 14:31:02,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:31:02,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:31:02,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:31:03,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 14:31:03,033 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:31:03,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130333115] [2021-11-22 14:31:03,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130333115] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:31:03,033 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:31:03,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-22 14:31:03,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641445839] [2021-11-22 14:31:03,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:31:03,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 14:31:03,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:31:03,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 14:31:03,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 14:31:03,036 INFO L87 Difference]: Start difference. First operand 67 states and 98 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:03,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:31:03,237 INFO L93 Difference]: Finished difference Result 169 states and 250 transitions. [2021-11-22 14:31:03,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 14:31:03,238 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-11-22 14:31:03,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:31:03,239 INFO L225 Difference]: With dead ends: 169 [2021-11-22 14:31:03,239 INFO L226 Difference]: Without dead ends: 125 [2021-11-22 14:31:03,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-22 14:31:03,241 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 89 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 14:31:03,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 164 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-22 14:31:03,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-11-22 14:31:03,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 77. [2021-11-22 14:31:03,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.4605263157894737) internal successors, (111), 76 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:03,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 111 transitions. [2021-11-22 14:31:03,263 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 111 transitions. Word has length 19 [2021-11-22 14:31:03,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:31:03,263 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 111 transitions. [2021-11-22 14:31:03,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:03,264 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 111 transitions. [2021-11-22 14:31:03,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-22 14:31:03,266 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:31:03,266 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] [2021-11-22 14:31:03,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-22 14:31:03,266 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:31:03,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:31:03,267 INFO L85 PathProgramCache]: Analyzing trace with hash -170409323, now seen corresponding path program 1 times [2021-11-22 14:31:03,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:31:03,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518397231] [2021-11-22 14:31:03,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:31:03,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:31:03,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:31:03,384 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 14:31:03,385 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:31:03,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518397231] [2021-11-22 14:31:03,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518397231] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:31:03,386 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:31:03,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 14:31:03,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181300572] [2021-11-22 14:31:03,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:31:03,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 14:31:03,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:31:03,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 14:31:03,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:31:03,390 INFO L87 Difference]: Start difference. First operand 77 states and 111 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 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) [2021-11-22 14:31:03,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:31:03,401 INFO L93 Difference]: Finished difference Result 124 states and 180 transitions. [2021-11-22 14:31:03,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 14:31:03,401 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 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 [2021-11-22 14:31:03,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:31:03,402 INFO L225 Difference]: With dead ends: 124 [2021-11-22 14:31:03,402 INFO L226 Difference]: Without dead ends: 60 [2021-11-22 14:31:03,403 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 [2021-11-22 14:31:03,406 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 57 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 14:31:03,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 58 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 14:31:03,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-22 14:31:03,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-11-22 14:31:03,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.4406779661016949) internal successors, (85), 59 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:03,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 85 transitions. [2021-11-22 14:31:03,413 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 85 transitions. Word has length 20 [2021-11-22 14:31:03,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:31:03,413 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 85 transitions. [2021-11-22 14:31:03,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 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) [2021-11-22 14:31:03,413 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 85 transitions. [2021-11-22 14:31:03,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-22 14:31:03,414 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:31:03,415 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] [2021-11-22 14:31:03,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-22 14:31:03,415 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:31:03,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:31:03,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1388506533, now seen corresponding path program 1 times [2021-11-22 14:31:03,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:31:03,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949222465] [2021-11-22 14:31:03,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:31:03,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:31:03,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:31:03,464 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:31:03,464 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:31:03,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949222465] [2021-11-22 14:31:03,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949222465] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:31:03,465 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:31:03,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 14:31:03,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844185594] [2021-11-22 14:31:03,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:31:03,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 14:31:03,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:31:03,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 14:31:03,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:31:03,467 INFO L87 Difference]: Start difference. First operand 60 states and 85 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:03,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:31:03,476 INFO L93 Difference]: Finished difference Result 81 states and 115 transitions. [2021-11-22 14:31:03,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 14:31:03,477 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 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 26 [2021-11-22 14:31:03,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:31:03,478 INFO L225 Difference]: With dead ends: 81 [2021-11-22 14:31:03,478 INFO L226 Difference]: Without dead ends: 70 [2021-11-22 14:31:03,479 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 [2021-11-22 14:31:03,480 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 4 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 113 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 [2021-11-22 14:31:03,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 113 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 14:31:03,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-11-22 14:31:03,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2021-11-22 14:31:03,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.434782608695652) internal successors, (99), 69 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:03,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 99 transitions. [2021-11-22 14:31:03,490 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 99 transitions. Word has length 26 [2021-11-22 14:31:03,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:31:03,490 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 99 transitions. [2021-11-22 14:31:03,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:03,491 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 99 transitions. [2021-11-22 14:31:03,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-22 14:31:03,491 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:31:03,491 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] [2021-11-22 14:31:03,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-22 14:31:03,492 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:31:03,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:31:03,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1130341095, now seen corresponding path program 1 times [2021-11-22 14:31:03,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:31:03,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8367712] [2021-11-22 14:31:03,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:31:03,493 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:31:03,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:31:03,549 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:31:03,550 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:31:03,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8367712] [2021-11-22 14:31:03,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8367712] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:31:03,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956251354] [2021-11-22 14:31:03,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:31:03,551 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:31:03,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:31:03,557 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:31:03,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-22 14:31:03,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:31:03,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-22 14:31:03,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:31:03,875 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:31:03,875 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-22 14:31:03,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956251354] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:31:03,876 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-22 14:31:03,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-22 14:31:03,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286735088] [2021-11-22 14:31:03,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:31:03,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 14:31:03,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:31:03,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 14:31:03,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-22 14:31:03,878 INFO L87 Difference]: Start difference. First operand 70 states and 99 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:04,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:31:04,062 INFO L93 Difference]: Finished difference Result 156 states and 254 transitions. [2021-11-22 14:31:04,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 14:31:04,063 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 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 26 [2021-11-22 14:31:04,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:31:04,064 INFO L225 Difference]: With dead ends: 156 [2021-11-22 14:31:04,064 INFO L226 Difference]: Without dead ends: 122 [2021-11-22 14:31:04,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-22 14:31:04,065 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 35 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 14:31:04,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 59 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-22 14:31:04,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-11-22 14:31:04,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 102. [2021-11-22 14:31:04,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.3366336633663367) internal successors, (135), 101 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:04,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 135 transitions. [2021-11-22 14:31:04,081 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 135 transitions. Word has length 26 [2021-11-22 14:31:04,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:31:04,082 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 135 transitions. [2021-11-22 14:31:04,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:04,082 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 135 transitions. [2021-11-22 14:31:04,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-22 14:31:04,086 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:31:04,087 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] [2021-11-22 14:31:04,124 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-22 14:31:04,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:31:04,312 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:31:04,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:31:04,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1226843574, now seen corresponding path program 1 times [2021-11-22 14:31:04,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:31:04,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271126363] [2021-11-22 14:31:04,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:31:04,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:31:04,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:31:04,581 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:31:04,582 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:31:04,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271126363] [2021-11-22 14:31:04,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271126363] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:31:04,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69817273] [2021-11-22 14:31:04,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:31:04,590 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:31:04,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:31:04,596 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:31:04,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-22 14:31:04,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:31:04,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-22 14:31:04,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:31:04,797 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 14:31:04,797 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-22 14:31:04,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69817273] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:31:04,798 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-22 14:31:04,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2021-11-22 14:31:04,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305027008] [2021-11-22 14:31:04,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:31:04,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 14:31:04,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:31:04,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 14:31:04,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-22 14:31:04,800 INFO L87 Difference]: Start difference. First operand 102 states and 135 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:04,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:31:04,991 INFO L93 Difference]: Finished difference Result 243 states and 351 transitions. [2021-11-22 14:31:04,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 14:31:04,992 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 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 32 [2021-11-22 14:31:04,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:31:04,993 INFO L225 Difference]: With dead ends: 243 [2021-11-22 14:31:04,993 INFO L226 Difference]: Without dead ends: 160 [2021-11-22 14:31:04,994 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-22 14:31:04,995 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 37 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 14:31:04,995 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 89 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-22 14:31:04,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-11-22 14:31:05,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 131. [2021-11-22 14:31:05,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.2923076923076924) internal successors, (168), 130 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:05,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 168 transitions. [2021-11-22 14:31:05,017 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 168 transitions. Word has length 32 [2021-11-22 14:31:05,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:31:05,019 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 168 transitions. [2021-11-22 14:31:05,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:05,020 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 168 transitions. [2021-11-22 14:31:05,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-22 14:31:05,024 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:31:05,024 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:31:05,063 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-22 14:31:05,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:31:05,244 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:31:05,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:31:05,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1448774913, now seen corresponding path program 1 times [2021-11-22 14:31:05,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:31:05,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965756818] [2021-11-22 14:31:05,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:31:05,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:31:05,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:31:05,380 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-22 14:31:05,381 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:31:05,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965756818] [2021-11-22 14:31:05,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965756818] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:31:05,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305643311] [2021-11-22 14:31:05,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:31:05,382 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:31:05,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:31:05,388 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:31:05,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-22 14:31:05,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:31:05,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-22 14:31:05,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:31:05,601 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-22 14:31:05,601 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-22 14:31:05,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305643311] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:31:05,602 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-22 14:31:05,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2021-11-22 14:31:05,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978017334] [2021-11-22 14:31:05,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:31:05,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 14:31:05,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:31:05,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 14:31:05,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-22 14:31:05,604 INFO L87 Difference]: Start difference. First operand 131 states and 168 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:05,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:31:05,836 INFO L93 Difference]: Finished difference Result 302 states and 416 transitions. [2021-11-22 14:31:05,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 14:31:05,837 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 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 38 [2021-11-22 14:31:05,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:31:05,838 INFO L225 Difference]: With dead ends: 302 [2021-11-22 14:31:05,838 INFO L226 Difference]: Without dead ends: 190 [2021-11-22 14:31:05,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-22 14:31:05,840 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 36 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 14:31:05,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 93 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-22 14:31:05,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-11-22 14:31:05,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 160. [2021-11-22 14:31:05,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 1.2641509433962264) internal successors, (201), 159 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:05,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 201 transitions. [2021-11-22 14:31:05,851 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 201 transitions. Word has length 38 [2021-11-22 14:31:05,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:31:05,852 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 201 transitions. [2021-11-22 14:31:05,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:05,852 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 201 transitions. [2021-11-22 14:31:05,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-22 14:31:05,854 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:31:05,854 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:31:05,882 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-22 14:31:06,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:31:06,068 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:31:06,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:31:06,069 INFO L85 PathProgramCache]: Analyzing trace with hash 882299696, now seen corresponding path program 1 times [2021-11-22 14:31:06,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:31:06,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539087479] [2021-11-22 14:31:06,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:31:06,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:31:06,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:31:06,258 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-22 14:31:06,259 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:31:06,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539087479] [2021-11-22 14:31:06,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539087479] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:31:06,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578891986] [2021-11-22 14:31:06,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:31:06,261 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:31:06,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:31:06,264 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:31:06,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-22 14:31:06,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:31:06,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-22 14:31:06,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:31:06,580 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-22 14:31:06,580 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-22 14:31:06,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578891986] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:31:06,581 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-22 14:31:06,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2021-11-22 14:31:06,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418628315] [2021-11-22 14:31:06,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:31:06,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 14:31:06,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:31:06,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 14:31:06,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-22 14:31:06,583 INFO L87 Difference]: Start difference. First operand 160 states and 201 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:06,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:31:06,700 INFO L93 Difference]: Finished difference Result 327 states and 422 transitions. [2021-11-22 14:31:06,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-22 14:31:06,700 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-22 14:31:06,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:31:06,702 INFO L225 Difference]: With dead ends: 327 [2021-11-22 14:31:06,702 INFO L226 Difference]: Without dead ends: 150 [2021-11-22 14:31:06,704 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-22 14:31:06,705 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 66 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 14:31:06,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 46 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 14:31:06,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-11-22 14:31:06,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 130. [2021-11-22 14:31:06,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 1.255813953488372) internal successors, (162), 129 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:06,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 162 transitions. [2021-11-22 14:31:06,736 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 162 transitions. Word has length 44 [2021-11-22 14:31:06,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:31:06,737 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 162 transitions. [2021-11-22 14:31:06,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:06,738 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 162 transitions. [2021-11-22 14:31:06,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-22 14:31:06,738 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:31:06,739 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:31:06,777 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-22 14:31:06,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:31:06,952 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:31:06,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:31:06,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1716436880, now seen corresponding path program 1 times [2021-11-22 14:31:06,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:31:06,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667873664] [2021-11-22 14:31:06,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:31:06,953 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:31:07,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:31:07,118 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-22 14:31:07,119 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:31:07,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667873664] [2021-11-22 14:31:07,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667873664] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:31:07,119 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:31:07,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-22 14:31:07,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363225524] [2021-11-22 14:31:07,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:31:07,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 14:31:07,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:31:07,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 14:31:07,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-22 14:31:07,123 INFO L87 Difference]: Start difference. First operand 130 states and 162 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:07,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:31:07,393 INFO L93 Difference]: Finished difference Result 491 states and 613 transitions. [2021-11-22 14:31:07,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 14:31:07,394 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-22 14:31:07,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:31:07,397 INFO L225 Difference]: With dead ends: 491 [2021-11-22 14:31:07,397 INFO L226 Difference]: Without dead ends: 380 [2021-11-22 14:31:07,397 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-22 14:31:07,398 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 135 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 14:31:07,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 200 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-22 14:31:07,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2021-11-22 14:31:07,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 130. [2021-11-22 14:31:07,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 1.255813953488372) internal successors, (162), 129 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:07,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 162 transitions. [2021-11-22 14:31:07,407 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 162 transitions. Word has length 65 [2021-11-22 14:31:07,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:31:07,408 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 162 transitions. [2021-11-22 14:31:07,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:07,408 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 162 transitions. [2021-11-22 14:31:07,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-22 14:31:07,409 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:31:07,409 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:31:07,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-22 14:31:07,410 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:31:07,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:31:07,410 INFO L85 PathProgramCache]: Analyzing trace with hash -865911640, now seen corresponding path program 1 times [2021-11-22 14:31:07,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:31:07,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296077649] [2021-11-22 14:31:07,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:31:07,411 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:31:07,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:31:07,506 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-22 14:31:07,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:31:07,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296077649] [2021-11-22 14:31:07,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296077649] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:31:07,507 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:31:07,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-22 14:31:07,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234542710] [2021-11-22 14:31:07,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:31:07,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 14:31:07,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:31:07,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 14:31:07,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-22 14:31:07,509 INFO L87 Difference]: Start difference. First operand 130 states and 162 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:07,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:31:07,606 INFO L93 Difference]: Finished difference Result 386 states and 482 transitions. [2021-11-22 14:31:07,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-22 14:31:07,606 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-22 14:31:07,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:31:07,609 INFO L225 Difference]: With dead ends: 386 [2021-11-22 14:31:07,609 INFO L226 Difference]: Without dead ends: 275 [2021-11-22 14:31:07,610 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-22 14:31:07,610 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 110 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 14:31:07,611 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 145 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 14:31:07,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-11-22 14:31:07,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 202. [2021-11-22 14:31:07,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 1.263681592039801) internal successors, (254), 201 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:07,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 254 transitions. [2021-11-22 14:31:07,623 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 254 transitions. Word has length 66 [2021-11-22 14:31:07,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:31:07,623 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 254 transitions. [2021-11-22 14:31:07,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:07,624 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 254 transitions. [2021-11-22 14:31:07,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-22 14:31:07,625 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:31:07,625 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:31:07,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-22 14:31:07,625 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:31:07,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:31:07,626 INFO L85 PathProgramCache]: Analyzing trace with hash 511658858, now seen corresponding path program 1 times [2021-11-22 14:31:07,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:31:07,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507734367] [2021-11-22 14:31:07,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:31:07,627 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:31:07,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:31:07,740 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-22 14:31:07,741 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:31:07,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507734367] [2021-11-22 14:31:07,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507734367] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:31:07,741 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:31:07,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-22 14:31:07,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508113577] [2021-11-22 14:31:07,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:31:07,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-22 14:31:07,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:31:07,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-22 14:31:07,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-22 14:31:07,743 INFO L87 Difference]: Start difference. First operand 202 states and 254 transitions. Second operand has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:08,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:31:08,157 INFO L93 Difference]: Finished difference Result 995 states and 1247 transitions. [2021-11-22 14:31:08,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-22 14:31:08,157 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-22 14:31:08,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:31:08,162 INFO L225 Difference]: With dead ends: 995 [2021-11-22 14:31:08,162 INFO L226 Difference]: Without dead ends: 812 [2021-11-22 14:31:08,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-22 14:31:08,164 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 203 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-22 14:31:08,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 335 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-22 14:31:08,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2021-11-22 14:31:08,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 202. [2021-11-22 14:31:08,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 1.263681592039801) internal successors, (254), 201 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:08,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 254 transitions. [2021-11-22 14:31:08,180 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 254 transitions. Word has length 66 [2021-11-22 14:31:08,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:31:08,180 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 254 transitions. [2021-11-22 14:31:08,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:08,180 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 254 transitions. [2021-11-22 14:31:08,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-22 14:31:08,181 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:31:08,182 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:31:08,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-22 14:31:08,182 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:31:08,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:31:08,183 INFO L85 PathProgramCache]: Analyzing trace with hash 309834924, now seen corresponding path program 1 times [2021-11-22 14:31:08,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:31:08,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711186313] [2021-11-22 14:31:08,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:31:08,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:31:08,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:31:08,292 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-22 14:31:08,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:31:08,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711186313] [2021-11-22 14:31:08,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711186313] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:31:08,293 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:31:08,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-22 14:31:08,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948699744] [2021-11-22 14:31:08,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:31:08,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-22 14:31:08,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:31:08,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-22 14:31:08,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-22 14:31:08,295 INFO L87 Difference]: Start difference. First operand 202 states and 254 transitions. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:08,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:31:08,828 INFO L93 Difference]: Finished difference Result 1014 states and 1267 transitions. [2021-11-22 14:31:08,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-22 14:31:08,829 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-22 14:31:08,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:31:08,834 INFO L225 Difference]: With dead ends: 1014 [2021-11-22 14:31:08,834 INFO L226 Difference]: Without dead ends: 831 [2021-11-22 14:31:08,835 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-22 14:31:08,835 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 271 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-22 14:31:08,836 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 389 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-22 14:31:08,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2021-11-22 14:31:08,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 198. [2021-11-22 14:31:08,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 1.2690355329949239) internal successors, (250), 197 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:08,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 250 transitions. [2021-11-22 14:31:08,851 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 250 transitions. Word has length 66 [2021-11-22 14:31:08,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:31:08,851 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 250 transitions. [2021-11-22 14:31:08,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:08,852 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 250 transitions. [2021-11-22 14:31:08,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-22 14:31:08,852 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:31:08,853 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:31:08,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-22 14:31:08,853 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:31:08,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:31:08,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1499003605, now seen corresponding path program 1 times [2021-11-22 14:31:08,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:31:08,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282744317] [2021-11-22 14:31:08,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:31:08,854 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:31:08,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:31:08,999 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 51 proven. 3 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-22 14:31:09,000 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:31:09,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282744317] [2021-11-22 14:31:09,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282744317] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:31:09,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266493899] [2021-11-22 14:31:09,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:31:09,001 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:31:09,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:31:09,004 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:31:09,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-22 14:31:09,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:31:09,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-22 14:31:09,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:31:09,323 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 48 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-22 14:31:09,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:31:09,573 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 52 proven. 3 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-22 14:31:09,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266493899] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:31:09,574 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:31:09,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6] total 12 [2021-11-22 14:31:09,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721287842] [2021-11-22 14:31:09,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:31:09,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-22 14:31:09,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:31:09,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-22 14:31:09,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-11-22 14:31:09,576 INFO L87 Difference]: Start difference. First operand 198 states and 250 transitions. Second operand has 12 states, 12 states have (on average 8.916666666666666) internal successors, (107), 12 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:09,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:31:09,997 INFO L93 Difference]: Finished difference Result 936 states and 1184 transitions. [2021-11-22 14:31:09,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-22 14:31:09,997 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.916666666666666) internal successors, (107), 12 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-22 14:31:09,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:31:10,002 INFO L225 Difference]: With dead ends: 936 [2021-11-22 14:31:10,002 INFO L226 Difference]: Without dead ends: 753 [2021-11-22 14:31:10,003 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2021-11-22 14:31:10,004 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 389 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-22 14:31:10,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [389 Valid, 149 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-22 14:31:10,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2021-11-22 14:31:10,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 600. [2021-11-22 14:31:10,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 600 states, 599 states have (on average 1.2771285475792988) internal successors, (765), 599 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:10,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 765 transitions. [2021-11-22 14:31:10,040 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 765 transitions. Word has length 68 [2021-11-22 14:31:10,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:31:10,040 INFO L470 AbstractCegarLoop]: Abstraction has 600 states and 765 transitions. [2021-11-22 14:31:10,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.916666666666666) internal successors, (107), 12 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:10,041 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 765 transitions. [2021-11-22 14:31:10,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-22 14:31:10,042 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:31:10,042 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:31:10,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-22 14:31:10,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-22 14:31:10,268 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:31:10,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:31:10,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1439601588, now seen corresponding path program 1 times [2021-11-22 14:31:10,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:31:10,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357517210] [2021-11-22 14:31:10,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:31:10,269 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:31:10,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:31:10,404 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 48 proven. 7 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-22 14:31:10,404 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:31:10,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357517210] [2021-11-22 14:31:10,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357517210] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:31:10,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65646744] [2021-11-22 14:31:10,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:31:10,405 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:31:10,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:31:10,406 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:31:10,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-22 14:31:10,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:31:10,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-22 14:31:10,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:31:12,289 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 48 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-22 14:31:12,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:31:12,585 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 52 proven. 3 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-22 14:31:12,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65646744] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:31:12,585 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:31:12,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 16 [2021-11-22 14:31:12,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630770122] [2021-11-22 14:31:12,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:31:12,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-22 14:31:12,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:31:12,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-22 14:31:12,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-11-22 14:31:12,587 INFO L87 Difference]: Start difference. First operand 600 states and 765 transitions. Second operand has 16 states, 16 states have (on average 6.5625) internal successors, (105), 16 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:13,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:31:13,810 INFO L93 Difference]: Finished difference Result 1746 states and 2221 transitions. [2021-11-22 14:31:13,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-22 14:31:13,811 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 6.5625) internal successors, (105), 16 states have internal predecessors, (105), 0 states have call successors, (0), 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 70 [2021-11-22 14:31:13,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:31:13,818 INFO L225 Difference]: With dead ends: 1746 [2021-11-22 14:31:13,818 INFO L226 Difference]: Without dead ends: 1302 [2021-11-22 14:31:13,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 131 SyntacticMatches, 9 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=191, Invalid=459, Unknown=0, NotChecked=0, Total=650 [2021-11-22 14:31:13,820 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 530 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 530 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 173 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-22 14:31:13,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [530 Valid, 437 Invalid, 823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 604 Invalid, 0 Unknown, 173 Unchecked, 0.8s Time] [2021-11-22 14:31:13,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1302 states. [2021-11-22 14:31:13,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1302 to 912. [2021-11-22 14:31:13,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 912 states, 911 states have (on average 1.300768386388584) internal successors, (1185), 911 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:13,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 912 states to 912 states and 1185 transitions. [2021-11-22 14:31:13,868 INFO L78 Accepts]: Start accepts. Automaton has 912 states and 1185 transitions. Word has length 70 [2021-11-22 14:31:13,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:31:13,868 INFO L470 AbstractCegarLoop]: Abstraction has 912 states and 1185 transitions. [2021-11-22 14:31:13,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.5625) internal successors, (105), 16 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:13,869 INFO L276 IsEmpty]: Start isEmpty. Operand 912 states and 1185 transitions. [2021-11-22 14:31:13,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-22 14:31:13,871 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:31:13,871 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:31:13,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-22 14:31:14,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-22 14:31:14,079 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:31:14,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:31:14,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1493994486, now seen corresponding path program 1 times [2021-11-22 14:31:14,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:31:14,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860357882] [2021-11-22 14:31:14,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:31:14,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:31:14,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:31:14,226 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 53 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-22 14:31:14,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:31:14,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860357882] [2021-11-22 14:31:14,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860357882] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:31:14,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246533042] [2021-11-22 14:31:14,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:31:14,227 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:31:14,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:31:14,229 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:31:14,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-22 14:31:14,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:31:14,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-22 14:31:14,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:31:14,721 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 57 proven. 6 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-22 14:31:14,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:31:14,939 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 47 proven. 21 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-22 14:31:14,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246533042] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:31:14,940 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:31:14,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2021-11-22 14:31:14,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834188147] [2021-11-22 14:31:14,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:31:14,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-22 14:31:14,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:31:14,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-22 14:31:14,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-11-22 14:31:14,942 INFO L87 Difference]: Start difference. First operand 912 states and 1185 transitions. Second operand has 14 states, 14 states have (on average 9.785714285714286) internal successors, (137), 14 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:15,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:31:15,417 INFO L93 Difference]: Finished difference Result 1970 states and 2529 transitions. [2021-11-22 14:31:15,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-22 14:31:15,417 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 9.785714285714286) internal successors, (137), 14 states have internal predecessors, (137), 0 states have call successors, (0), 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 70 [2021-11-22 14:31:15,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:31:15,424 INFO L225 Difference]: With dead ends: 1970 [2021-11-22 14:31:15,424 INFO L226 Difference]: Without dead ends: 1085 [2021-11-22 14:31:15,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=133, Invalid=373, Unknown=0, NotChecked=0, Total=506 [2021-11-22 14:31:15,427 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 243 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-22 14:31:15,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 552 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-22 14:31:15,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1085 states. [2021-11-22 14:31:15,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1085 to 688. [2021-11-22 14:31:15,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 688 states, 687 states have (on average 1.2925764192139737) internal successors, (888), 687 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:15,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 688 states to 688 states and 888 transitions. [2021-11-22 14:31:15,469 INFO L78 Accepts]: Start accepts. Automaton has 688 states and 888 transitions. Word has length 70 [2021-11-22 14:31:15,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:31:15,469 INFO L470 AbstractCegarLoop]: Abstraction has 688 states and 888 transitions. [2021-11-22 14:31:15,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.785714285714286) internal successors, (137), 14 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:15,470 INFO L276 IsEmpty]: Start isEmpty. Operand 688 states and 888 transitions. [2021-11-22 14:31:15,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-22 14:31:15,471 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:31:15,472 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:31:15,509 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-22 14:31:15,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-22 14:31:15,688 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:31:15,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:31:15,688 INFO L85 PathProgramCache]: Analyzing trace with hash 605183798, now seen corresponding path program 2 times [2021-11-22 14:31:15,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:31:15,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549000600] [2021-11-22 14:31:15,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:31:15,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:31:15,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-22 14:31:15,756 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-22 14:31:15,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-22 14:31:15,837 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-22 14:31:15,837 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-22 14:31:15,839 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-22 14:31:15,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-22 14:31:15,846 INFO L732 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:31:15,849 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-22 14:31:15,981 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 02:31:15 BoogieIcfgContainer [2021-11-22 14:31:15,982 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-22 14:31:15,982 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-22 14:31:15,983 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-22 14:31:15,983 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-22 14:31:15,983 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:31:01" (3/4) ... [2021-11-22 14:31:15,987 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-22 14:31:15,987 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-22 14:31:15,988 INFO L158 Benchmark]: Toolchain (without parser) took 15509.22ms. Allocated memory was 98.6MB in the beginning and 148.9MB in the end (delta: 50.3MB). Free memory was 63.5MB in the beginning and 55.1MB in the end (delta: 8.5MB). Peak memory consumption was 58.9MB. Max. memory is 16.1GB. [2021-11-22 14:31:15,989 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 98.6MB. Free memory was 70.9MB in the beginning and 70.9MB in the end (delta: 27.7kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-22 14:31:15,989 INFO L158 Benchmark]: CACSL2BoogieTranslator took 346.29ms. Allocated memory is still 98.6MB. Free memory was 63.4MB in the beginning and 72.3MB in the end (delta: -8.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-22 14:31:15,989 INFO L158 Benchmark]: Boogie Procedure Inliner took 39.62ms. Allocated memory is still 98.6MB. Free memory was 72.3MB in the beginning and 70.5MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-22 14:31:15,990 INFO L158 Benchmark]: Boogie Preprocessor took 37.11ms. Allocated memory is still 98.6MB. Free memory was 70.5MB in the beginning and 68.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-22 14:31:15,990 INFO L158 Benchmark]: RCFGBuilder took 472.25ms. Allocated memory is still 98.6MB. Free memory was 68.9MB in the beginning and 56.7MB in the end (delta: 12.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-22 14:31:15,991 INFO L158 Benchmark]: TraceAbstraction took 14603.08ms. Allocated memory was 98.6MB in the beginning and 148.9MB in the end (delta: 50.3MB). Free memory was 55.9MB in the beginning and 55.1MB in the end (delta: 891.6kB). Peak memory consumption was 53.4MB. Max. memory is 16.1GB. [2021-11-22 14:31:15,991 INFO L158 Benchmark]: Witness Printer took 4.41ms. Allocated memory is still 148.9MB. Free memory is still 55.1MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-22 14:31:16,000 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 98.6MB. Free memory was 70.9MB in the beginning and 70.9MB in the end (delta: 27.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 346.29ms. Allocated memory is still 98.6MB. Free memory was 63.4MB in the beginning and 72.3MB in the end (delta: -8.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 39.62ms. Allocated memory is still 98.6MB. Free memory was 72.3MB in the beginning and 70.5MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 37.11ms. Allocated memory is still 98.6MB. Free memory was 70.5MB in the beginning and 68.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 472.25ms. Allocated memory is still 98.6MB. Free memory was 68.9MB in the beginning and 56.7MB in the end (delta: 12.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 14603.08ms. Allocated memory was 98.6MB in the beginning and 148.9MB in the end (delta: 50.3MB). Free memory was 55.9MB in the beginning and 55.1MB in the end (delta: 891.6kB). Peak memory consumption was 53.4MB. Max. memory is 16.1GB. * Witness Printer took 4.41ms. Allocated memory is still 148.9MB. Free memory is still 55.1MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 25]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseOr at line 116, overapproximation of bitwiseAnd at line 96. Possible FailurePath: [L124] unsigned int a, b, r; [L126] b = __VERIFIER_nondet_uint() [L128] a = 234770789 [L130] CALL, EXPR mp_add(a, b) [L42] unsigned char a0, a1, a2, a3; [L43] unsigned char b0, b1, b2, b3; [L44] unsigned char r0, r1, r2, r3; [L45] unsigned short carry; [L46] unsigned short partial_sum; [L47] unsigned int r; [L48] unsigned char i; [L49] unsigned char na, nb; [L50] a0 = a [L51] a1 = a >> 8 [L52] a2 = a >> 16U [L53] a3 = a >> 24U [L54] b0 = b [L55] b1 = b >> 8U [L56] b2 = b >> 16U [L57] b3 = b >> 24U [L58] na = (unsigned char)4 VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, na=4] [L59] COND FALSE !(a3 == (unsigned char)0) VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, na=4] [L68] nb = (unsigned char)4 VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, na=4, nb=4] [L69] COND TRUE b3 == (unsigned char)0 [L70] nb = nb - 1 VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, na=4, nb=3] [L71] COND TRUE b2 == (unsigned char)0 [L72] nb = nb - 1 VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, na=4, nb=2] [L73] COND TRUE b1 == (unsigned char)0 [L74] nb = nb - 1 VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, na=4, nb=1] [L78] carry = (unsigned short)0 [L79] i = (unsigned char)0 VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=0, na=4, nb=1] [L80] COND TRUE (i < na) || (i < nb) || (carry != (unsigned short)0) [L81] partial_sum = carry [L82] carry = (unsigned short)0 VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=0, na=4, nb=1, partial_sum=0] [L83] COND TRUE i < na VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=0, na=4, nb=1, partial_sum=0] [L84] COND TRUE i == (unsigned char)0 [L84] partial_sum = partial_sum + a0 VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=0, na=4, nb=1, partial_sum=101] [L85] COND FALSE !(i == (unsigned char)1) VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=0, na=4, nb=1, partial_sum=101] [L86] COND FALSE !(i == (unsigned char)2) VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=0, na=4, nb=1, partial_sum=101] [L87] COND FALSE !(i == (unsigned char)3) VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=0, na=4, nb=1, partial_sum=101] [L89] COND TRUE i < nb VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=0, na=4, nb=1, partial_sum=101] [L90] COND TRUE i == (unsigned char)0 [L90] partial_sum = partial_sum + b0 VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=0, na=4, nb=1, partial_sum=356] [L91] COND FALSE !(i == (unsigned char)1) VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=0, na=4, nb=1, partial_sum=356] [L92] COND FALSE !(i == (unsigned char)2) VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=0, na=4, nb=1, partial_sum=356] [L93] COND FALSE !(i == (unsigned char)3) VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=0, na=4, nb=1, partial_sum=356] [L95] COND TRUE partial_sum > ((unsigned char)255) [L96] partial_sum = partial_sum & ((unsigned char)255) [L97] carry = (unsigned short)1 VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=1, i=0, na=4, nb=1] [L99] COND TRUE i == (unsigned char)0 [L99] r0 = (unsigned char)partial_sum VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=1, i=0, na=4, nb=1, partial_sum=20838, r0=234770790] [L100] COND FALSE !(i == (unsigned char)1) VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=1, i=0, na=4, nb=1, partial_sum=20838, r0=234770790] [L101] COND FALSE !(i == (unsigned char)2) VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=1, i=0, na=4, nb=1, partial_sum=20838, r0=234770790] [L102] COND FALSE !(i == (unsigned char)3) VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=1, i=0, na=4, nb=1, partial_sum=20838, r0=234770790] [L104] i = i + (unsigned char)1 VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=1, i=1, na=4, nb=1, partial_sum=20838, r0=234770790] [L80] COND TRUE (i < na) || (i < nb) || (carry != (unsigned short)0) [L81] partial_sum = carry [L82] carry = (unsigned short)0 VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=1, na=4, nb=1, partial_sum=1, r0=234770790] [L83] COND TRUE i < na VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=1, na=4, nb=1, partial_sum=1, r0=234770790] [L84] COND FALSE !(i == (unsigned char)0) VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=1, na=4, nb=1, partial_sum=1, r0=234770790] [L85] COND TRUE i == (unsigned char)1 [L85] partial_sum = partial_sum + a1 VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=1, na=4, nb=1, partial_sum=82, r0=234770790] [L86] COND FALSE !(i == (unsigned char)2) VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=1, na=4, nb=1, partial_sum=82, r0=234770790] [L87] COND FALSE !(i == (unsigned char)3) VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=1, na=4, nb=1, partial_sum=82, r0=234770790] [L89] COND FALSE !(i < nb) VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=1, na=4, nb=1, partial_sum=82, r0=234770790] [L95] COND FALSE !(partial_sum > ((unsigned char)255)) VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=1, na=4, nb=1, partial_sum=82, r0=234770790] [L99] COND FALSE !(i == (unsigned char)0) VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=1, na=4, nb=1, partial_sum=82, r0=234770790] [L100] COND TRUE i == (unsigned char)1 [L100] r1 = (unsigned char)partial_sum VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=1, na=4, nb=1, partial_sum=82, r0=234770790, r1=82] [L101] COND FALSE !(i == (unsigned char)2) VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=1, na=4, nb=1, partial_sum=82, r0=234770790, r1=82] [L102] COND FALSE !(i == (unsigned char)3) VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=1, na=4, nb=1, partial_sum=82, r0=234770790, r1=82] [L104] i = i + (unsigned char)1 VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=2, na=4, nb=1, partial_sum=82, r0=234770790, r1=82] [L80] COND TRUE (i < na) || (i < nb) || (carry != (unsigned short)0) [L81] partial_sum = carry [L82] carry = (unsigned short)0 VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=2, na=4, nb=1, partial_sum=0, r0=234770790, r1=82] [L83] COND TRUE i < na VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=2, na=4, nb=1, partial_sum=0, r0=234770790, r1=82] [L84] COND FALSE !(i == (unsigned char)0) VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=2, na=4, nb=1, partial_sum=0, r0=234770790, r1=82] [L85] COND FALSE !(i == (unsigned char)1) VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=2, na=4, nb=1, partial_sum=0, r0=234770790, r1=82] [L86] COND TRUE i == (unsigned char)2 [L86] partial_sum = partial_sum + a2 VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=2, na=4, nb=1, partial_sum=254, r0=234770790, r1=82] [L87] COND FALSE !(i == (unsigned char)3) VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=2, na=4, nb=1, partial_sum=254, r0=234770790, r1=82] [L89] COND FALSE !(i < nb) VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=2, na=4, nb=1, partial_sum=254, r0=234770790, r1=82] [L95] COND FALSE !(partial_sum > ((unsigned char)255)) VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=2, na=4, nb=1, partial_sum=254, r0=234770790, r1=82] [L99] COND FALSE !(i == (unsigned char)0) VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=2, na=4, nb=1, partial_sum=254, r0=234770790, r1=82] [L100] COND FALSE !(i == (unsigned char)1) VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=2, na=4, nb=1, partial_sum=254, r0=234770790, r1=82] [L101] COND TRUE i == (unsigned char)2 [L101] r2 = (unsigned char)partial_sum VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=2, na=4, nb=1, partial_sum=254, r0=234770790, r1=82, r2=254] [L102] COND FALSE !(i == (unsigned char)3) VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=2, na=4, nb=1, partial_sum=254, r0=234770790, r1=82, r2=254] [L104] i = i + (unsigned char)1 VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=3, na=4, nb=1, partial_sum=254, r0=234770790, r1=82, r2=254] [L80] COND TRUE (i < na) || (i < nb) || (carry != (unsigned short)0) [L81] partial_sum = carry [L82] carry = (unsigned short)0 VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=3, na=4, nb=1, partial_sum=0, r0=234770790, r1=82, r2=254] [L83] COND TRUE i < na VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=3, na=4, nb=1, partial_sum=0, r0=234770790, r1=82, r2=254] [L84] COND FALSE !(i == (unsigned char)0) VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=3, na=4, nb=1, partial_sum=0, r0=234770790, r1=82, r2=254] [L85] COND FALSE !(i == (unsigned char)1) VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=3, na=4, nb=1, partial_sum=0, r0=234770790, r1=82, r2=254] [L86] COND FALSE !(i == (unsigned char)2) VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=3, na=4, nb=1, partial_sum=0, r0=234770790, r1=82, r2=254] [L87] COND TRUE i == (unsigned char)3 [L87] partial_sum = partial_sum + a3 VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=3, na=4, nb=1, partial_sum=13, r0=234770790, r1=82, r2=254] [L89] COND FALSE !(i < nb) VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=3, na=4, nb=1, partial_sum=13, r0=234770790, r1=82, r2=254] [L95] COND FALSE !(partial_sum > ((unsigned char)255)) VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=3, na=4, nb=1, partial_sum=13, r0=234770790, r1=82, r2=254] [L99] COND FALSE !(i == (unsigned char)0) VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=3, na=4, nb=1, partial_sum=13, r0=234770790, r1=82, r2=254] [L100] COND FALSE !(i == (unsigned char)1) VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=3, na=4, nb=1, partial_sum=13, r0=234770790, r1=82, r2=254] [L101] COND FALSE !(i == (unsigned char)2) VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=3, na=4, nb=1, partial_sum=13, r0=234770790, r1=82, r2=254] [L102] COND TRUE i == (unsigned char)3 [L102] r3 = (unsigned char)partial_sum VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=3, na=4, nb=1, partial_sum=13, r0=234770790, r1=82, r2=254, r3=13] [L104] i = i + (unsigned char)1 VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=4, na=4, nb=1, partial_sum=13, r0=234770790, r1=82, r2=254, r3=13] [L80] COND FALSE !((i < na) || (i < nb) || (carry != (unsigned short)0)) VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=4, na=4, nb=1, partial_sum=13, r0=234770790, r1=82, r2=254, r3=13] [L107] COND FALSE !(i < (unsigned char)4) VAL [\old(a)=234770789, \old(b)=255, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=4, na=4, nb=1, partial_sum=13, r0=234770790, r1=82, r2=254, r3=13] [L116] r = r0 | (r1 << 8U) | (r2 << 16U) | ((unsigned int)r3 << 24U) [L118] return r; VAL [\old(a)=234770789, \old(b)=255, \result=3, a=234770789, a0=234770789, a1=917073, a2=3582, a3=13, b=255, b0=-4294967041, b1=-16777216, b2=-65536, b3=-256, carry=0, i=4, na=4, nb=1, partial_sum=13, r=3, r0=234770790, r1=82, r2=254, r3=13] [L130] RET, EXPR mp_add(a, b) [L130] r = mp_add(a, b) [L132] CALL __VERIFIER_assert(r == a + b) [L24] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L25] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 42 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 14.3s, OverallIterations: 18, TraceHistogramMax: 4, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 5.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2314 SdHoareTripleChecker+Valid, 3.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2314 mSDsluCounter, 3112 SdHoareTripleChecker+Invalid, 3.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 173 IncrementalHoareTripleChecker+Unchecked, 2043 mSDsCounter, 275 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3105 IncrementalHoareTripleChecker+Invalid, 3553 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 275 mSolverCounterUnsat, 1069 mSDtfsCounter, 3105 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 695 GetRequests, 564 SyntacticMatches, 17 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 1.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=912occurred in iteration=16, InterpolantAutomatonStates: 107, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 17 MinimizatonAttempts, 2693 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 1.4s SatisfiabilityAnalysisTime, 5.2s InterpolantComputationTime, 1136 NumberOfCodeBlocks, 1136 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 1247 ConstructedInterpolants, 26 QuantifiedInterpolants, 6493 SizeOfPredicates, 21 NumberOfNonLiveVariables, 1029 ConjunctsInSsa, 57 ConjunctsInUnsatCore, 27 InterpolantComputations, 14 PerfectInterpolantSequences, 1079/1138 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-11-22 14:31:16,026 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/config/AutomizerReach.xml -i ../../sv-benchmarks/c/bitvector/byte_add_1-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0 --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 0ba3e3db8f44a5e9ad151b8422bee8deebac1dcf47a42cba5485daeafd8d8e80 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-22 14:31:18,405 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-22 14:31:18,407 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-22 14:31:18,450 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-22 14:31:18,452 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-22 14:31:18,456 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-22 14:31:18,458 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-22 14:31:18,468 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-22 14:31:18,471 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-22 14:31:18,476 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-22 14:31:18,477 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-22 14:31:18,479 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-22 14:31:18,480 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-22 14:31:18,482 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-22 14:31:18,485 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-22 14:31:18,489 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-22 14:31:18,491 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-22 14:31:18,492 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-22 14:31:18,494 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-22 14:31:18,510 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-22 14:31:18,512 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-22 14:31:18,513 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-22 14:31:18,516 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-22 14:31:18,518 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-22 14:31:18,526 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-22 14:31:18,527 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-22 14:31:18,527 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-22 14:31:18,529 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-22 14:31:18,530 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-22 14:31:18,531 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-22 14:31:18,532 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-22 14:31:18,533 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-22 14:31:18,535 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-22 14:31:18,536 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-22 14:31:18,537 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-22 14:31:18,538 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-22 14:31:18,539 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-22 14:31:18,539 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-22 14:31:18,539 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-22 14:31:18,541 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-22 14:31:18,542 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-22 14:31:18,547 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-11-22 14:31:18,590 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-22 14:31:18,591 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-22 14:31:18,591 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-22 14:31:18,592 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-22 14:31:18,594 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-22 14:31:18,594 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-22 14:31:18,594 INFO L138 SettingsManager]: * Use SBE=true [2021-11-22 14:31:18,595 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-22 14:31:18,595 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-22 14:31:18,595 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-22 14:31:18,597 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-22 14:31:18,597 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-22 14:31:18,597 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-22 14:31:18,597 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-22 14:31:18,598 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-22 14:31:18,598 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-22 14:31:18,598 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-22 14:31:18,599 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-22 14:31:18,599 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-22 14:31:18,599 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-22 14:31:18,600 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-22 14:31:18,600 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-22 14:31:18,600 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-22 14:31:18,601 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-22 14:31:18,601 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 14:31:18,601 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-22 14:31:18,602 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-22 14:31:18,602 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-22 14:31:18,602 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-22 14:31:18,603 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-22 14:31:18,603 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-22 14:31:18,603 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-22 14:31:18,604 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-22 14:31:18,604 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-22 14:31:18,604 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-22 14:31:18,605 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0ba3e3db8f44a5e9ad151b8422bee8deebac1dcf47a42cba5485daeafd8d8e80 [2021-11-22 14:31:18,988 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-22 14:31:19,024 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-22 14:31:19,028 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-22 14:31:19,029 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-22 14:31:19,030 INFO L275 PluginConnector]: CDTParser initialized [2021-11-22 14:31:19,032 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/../../sv-benchmarks/c/bitvector/byte_add_1-1.i [2021-11-22 14:31:19,098 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/data/fe6ae6c52/625207feaf904a69877a34c7401f11c3/FLAG6a6acf5e7 [2021-11-22 14:31:19,630 INFO L306 CDTParser]: Found 1 translation units. [2021-11-22 14:31:19,630 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/sv-benchmarks/c/bitvector/byte_add_1-1.i [2021-11-22 14:31:19,642 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/data/fe6ae6c52/625207feaf904a69877a34c7401f11c3/FLAG6a6acf5e7 [2021-11-22 14:31:19,967 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/data/fe6ae6c52/625207feaf904a69877a34c7401f11c3 [2021-11-22 14:31:19,970 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-22 14:31:19,971 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-22 14:31:19,973 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-22 14:31:19,973 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-22 14:31:19,977 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-22 14:31:19,978 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:31:19" (1/1) ... [2021-11-22 14:31:19,979 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69f6e0e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:31:19, skipping insertion in model container [2021-11-22 14:31:19,979 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:31:19" (1/1) ... [2021-11-22 14:31:19,987 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-22 14:31:20,009 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-22 14:31:20,152 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_5b3b118f-3294-4789-99f4-6fca45618ad6/sv-benchmarks/c/bitvector/byte_add_1-1.i[1168,1181] [2021-11-22 14:31:20,191 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 14:31:20,202 INFO L203 MainTranslator]: Completed pre-run [2021-11-22 14:31:20,228 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_5b3b118f-3294-4789-99f4-6fca45618ad6/sv-benchmarks/c/bitvector/byte_add_1-1.i[1168,1181] [2021-11-22 14:31:20,282 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 14:31:20,297 INFO L208 MainTranslator]: Completed translation [2021-11-22 14:31:20,298 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:31:20 WrapperNode [2021-11-22 14:31:20,298 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-22 14:31:20,299 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-22 14:31:20,299 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-22 14:31:20,300 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-22 14:31:20,307 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:31:20" (1/1) ... [2021-11-22 14:31:20,315 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:31:20" (1/1) ... [2021-11-22 14:31:20,340 INFO L137 Inliner]: procedures = 16, calls = 8, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 123 [2021-11-22 14:31:20,340 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-22 14:31:20,341 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-22 14:31:20,341 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-22 14:31:20,341 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-22 14:31:20,349 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:31:20" (1/1) ... [2021-11-22 14:31:20,350 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:31:20" (1/1) ... [2021-11-22 14:31:20,353 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:31:20" (1/1) ... [2021-11-22 14:31:20,354 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:31:20" (1/1) ... [2021-11-22 14:31:20,362 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:31:20" (1/1) ... [2021-11-22 14:31:20,368 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:31:20" (1/1) ... [2021-11-22 14:31:20,370 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:31:20" (1/1) ... [2021-11-22 14:31:20,374 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-22 14:31:20,375 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-22 14:31:20,375 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-22 14:31:20,375 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-22 14:31:20,376 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:31:20" (1/1) ... [2021-11-22 14:31:20,396 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 14:31:20,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:31:20,439 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-22 14:31:20,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-22 14:31:20,477 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-22 14:31:20,477 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-22 14:31:20,477 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-22 14:31:20,477 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-22 14:31:20,566 INFO L236 CfgBuilder]: Building ICFG [2021-11-22 14:31:20,573 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-22 14:31:20,891 INFO L277 CfgBuilder]: Performing block encoding [2021-11-22 14:31:20,898 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-22 14:31:20,898 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-22 14:31:20,900 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:31:20 BoogieIcfgContainer [2021-11-22 14:31:20,901 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-22 14:31:20,902 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-22 14:31:20,902 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-22 14:31:20,905 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-22 14:31:20,906 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 02:31:19" (1/3) ... [2021-11-22 14:31:20,906 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@333567d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:31:20, skipping insertion in model container [2021-11-22 14:31:20,907 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:31:20" (2/3) ... [2021-11-22 14:31:20,907 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@333567d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:31:20, skipping insertion in model container [2021-11-22 14:31:20,907 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:31:20" (3/3) ... [2021-11-22 14:31:20,909 INFO L111 eAbstractionObserver]: Analyzing ICFG byte_add_1-1.i [2021-11-22 14:31:20,914 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-22 14:31:20,914 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-22 14:31:20,972 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-22 14:31:20,986 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 [2021-11-22 14:31:20,986 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-22 14:31:21,028 INFO L276 IsEmpty]: Start isEmpty. Operand has 42 states, 40 states have (on average 1.775) internal successors, (71), 41 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:21,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-22 14:31:21,035 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:31:21,036 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:31:21,036 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:31:21,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:31:21,047 INFO L85 PathProgramCache]: Analyzing trace with hash 255061167, now seen corresponding path program 1 times [2021-11-22 14:31:21,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 14:31:21,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1854495640] [2021-11-22 14:31:21,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:31:21,060 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 14:31:21,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 14:31:21,066 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 14:31:21,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-22 14:31:21,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:31:21,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-22 14:31:21,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:31:21,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:31:21,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:31:21,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:31:21,227 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 14:31:21,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1854495640] [2021-11-22 14:31:21,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1854495640] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-22 14:31:21,228 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:31:21,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-22 14:31:21,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529149749] [2021-11-22 14:31:21,231 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-22 14:31:21,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-22 14:31:21,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 14:31:21,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-22 14:31:21,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-22 14:31:21,268 INFO L87 Difference]: Start difference. First operand has 42 states, 40 states have (on average 1.775) internal successors, (71), 41 states have internal predecessors, (71), 0 states have call successors, (0), 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 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:21,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:31:21,288 INFO L93 Difference]: Finished difference Result 57 states and 92 transitions. [2021-11-22 14:31:21,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-22 14:31:21,290 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 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 12 [2021-11-22 14:31:21,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:31:21,299 INFO L225 Difference]: With dead ends: 57 [2021-11-22 14:31:21,299 INFO L226 Difference]: Without dead ends: 38 [2021-11-22 14:31:21,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-22 14:31:21,306 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 14:31:21,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 14:31:21,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-22 14:31:21,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-11-22 14:31:21,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.7297297297297298) internal successors, (64), 37 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:21,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 64 transitions. [2021-11-22 14:31:21,343 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 64 transitions. Word has length 12 [2021-11-22 14:31:21,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:31:21,344 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 64 transitions. [2021-11-22 14:31:21,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:21,345 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 64 transitions. [2021-11-22 14:31:21,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-22 14:31:21,346 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:31:21,346 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:31:21,361 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-22 14:31:21,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 14:31:21,558 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:31:21,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:31:21,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1803477009, now seen corresponding path program 1 times [2021-11-22 14:31:21,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 14:31:21,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [475899572] [2021-11-22 14:31:21,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:31:21,566 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 14:31:21,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 14:31:21,567 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 14:31:21,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-22 14:31:21,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:31:21,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-22 14:31:21,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:31:21,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:31:21,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:31:21,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:31:21,823 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 14:31:21,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [475899572] [2021-11-22 14:31:21,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [475899572] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-22 14:31:21,824 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:31:21,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-22 14:31:21,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626072115] [2021-11-22 14:31:21,825 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-22 14:31:21,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-22 14:31:21,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 14:31:21,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-22 14:31:21,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-22 14:31:21,829 INFO L87 Difference]: Start difference. First operand 38 states and 64 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:22,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:31:22,246 INFO L93 Difference]: Finished difference Result 172 states and 301 transitions. [2021-11-22 14:31:22,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-22 14:31:22,247 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 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 12 [2021-11-22 14:31:22,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:31:22,250 INFO L225 Difference]: With dead ends: 172 [2021-11-22 14:31:22,250 INFO L226 Difference]: Without dead ends: 144 [2021-11-22 14:31:22,251 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-11-22 14:31:22,253 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 226 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-22 14:31:22,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 170 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-22 14:31:22,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-11-22 14:31:22,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 112. [2021-11-22 14:31:22,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.6486486486486487) internal successors, (183), 111 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:22,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 183 transitions. [2021-11-22 14:31:22,278 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 183 transitions. Word has length 12 [2021-11-22 14:31:22,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:31:22,279 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 183 transitions. [2021-11-22 14:31:22,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:22,279 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 183 transitions. [2021-11-22 14:31:22,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-22 14:31:22,280 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:31:22,280 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:31:22,296 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-22 14:31:22,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 14:31:22,492 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:31:22,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:31:22,493 INFO L85 PathProgramCache]: Analyzing trace with hash 583572890, now seen corresponding path program 1 times [2021-11-22 14:31:22,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 14:31:22,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [817860377] [2021-11-22 14:31:22,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:31:22,494 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 14:31:22,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 14:31:22,495 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 14:31:22,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-22 14:31:22,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:31:22,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-22 14:31:22,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:31:22,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:31:22,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:31:22,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:31:22,656 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 14:31:22,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [817860377] [2021-11-22 14:31:22,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [817860377] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-22 14:31:22,661 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:31:22,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2021-11-22 14:31:22,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129541445] [2021-11-22 14:31:22,664 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-22 14:31:22,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-22 14:31:22,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 14:31:22,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-22 14:31:22,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-22 14:31:22,669 INFO L87 Difference]: Start difference. First operand 112 states and 183 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 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) [2021-11-22 14:31:23,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:31:23,467 INFO L93 Difference]: Finished difference Result 345 states and 594 transitions. [2021-11-22 14:31:23,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-22 14:31:23,468 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 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 14 [2021-11-22 14:31:23,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:31:23,472 INFO L225 Difference]: With dead ends: 345 [2021-11-22 14:31:23,472 INFO L226 Difference]: Without dead ends: 300 [2021-11-22 14:31:23,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-11-22 14:31:23,475 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 925 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 925 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-22 14:31:23,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [925 Valid, 228 Invalid, 619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-22 14:31:23,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-11-22 14:31:23,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 225. [2021-11-22 14:31:23,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 1.6383928571428572) internal successors, (367), 224 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:23,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 367 transitions. [2021-11-22 14:31:23,512 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 367 transitions. Word has length 14 [2021-11-22 14:31:23,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:31:23,512 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 367 transitions. [2021-11-22 14:31:23,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 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) [2021-11-22 14:31:23,513 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 367 transitions. [2021-11-22 14:31:23,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-22 14:31:23,516 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:31:23,516 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] [2021-11-22 14:31:23,528 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-22 14:31:23,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 14:31:23,731 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:31:23,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:31:23,731 INFO L85 PathProgramCache]: Analyzing trace with hash -842586557, now seen corresponding path program 1 times [2021-11-22 14:31:23,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 14:31:23,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [535203560] [2021-11-22 14:31:23,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:31:23,733 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 14:31:23,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 14:31:23,734 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 14:31:23,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-22 14:31:23,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:31:23,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-22 14:31:23,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:31:23,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:31:23,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:31:23,944 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:31:23,944 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 14:31:23,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [535203560] [2021-11-22 14:31:23,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [535203560] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-22 14:31:23,950 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:31:23,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-22 14:31:23,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005577648] [2021-11-22 14:31:23,950 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-22 14:31:23,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-22 14:31:23,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 14:31:23,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-22 14:31:23,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-22 14:31:23,953 INFO L87 Difference]: Start difference. First operand 225 states and 367 transitions. Second operand has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:24,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:31:24,297 INFO L93 Difference]: Finished difference Result 1018 states and 1671 transitions. [2021-11-22 14:31:24,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-22 14:31:24,297 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 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 26 [2021-11-22 14:31:24,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:31:24,303 INFO L225 Difference]: With dead ends: 1018 [2021-11-22 14:31:24,303 INFO L226 Difference]: Without dead ends: 818 [2021-11-22 14:31:24,305 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-11-22 14:31:24,307 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 209 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-22 14:31:24,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 187 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-22 14:31:24,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 818 states. [2021-11-22 14:31:24,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 818 to 467. [2021-11-22 14:31:24,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 466 states have (on average 1.53862660944206) internal successors, (717), 466 states have internal predecessors, (717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:24,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 717 transitions. [2021-11-22 14:31:24,351 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 717 transitions. Word has length 26 [2021-11-22 14:31:24,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:31:24,352 INFO L470 AbstractCegarLoop]: Abstraction has 467 states and 717 transitions. [2021-11-22 14:31:24,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:24,353 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 717 transitions. [2021-11-22 14:31:24,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-22 14:31:24,356 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:31:24,356 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] [2021-11-22 14:31:24,372 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-22 14:31:24,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 14:31:24,567 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:31:24,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:31:24,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1924928046, now seen corresponding path program 1 times [2021-11-22 14:31:24,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 14:31:24,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1462737155] [2021-11-22 14:31:24,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:31:24,569 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 14:31:24,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 14:31:24,570 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 14:31:24,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-22 14:31:24,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:31:24,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-22 14:31:24,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:31:24,674 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 14:31:24,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:31:24,735 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 14:31:24,736 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 14:31:24,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1462737155] [2021-11-22 14:31:24,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1462737155] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-22 14:31:24,737 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:31:24,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-22 14:31:24,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040406196] [2021-11-22 14:31:24,737 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-22 14:31:24,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 14:31:24,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 14:31:24,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 14:31:24,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-22 14:31:24,740 INFO L87 Difference]: Start difference. First operand 467 states and 717 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 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) [2021-11-22 14:31:24,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:31:24,752 INFO L93 Difference]: Finished difference Result 498 states and 759 transitions. [2021-11-22 14:31:24,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 14:31:24,753 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 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 28 [2021-11-22 14:31:24,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:31:24,755 INFO L225 Difference]: With dead ends: 498 [2021-11-22 14:31:24,755 INFO L226 Difference]: Without dead ends: 260 [2021-11-22 14:31:24,756 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-22 14:31:24,757 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 114 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 14:31:24,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 58 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 14:31:24,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-11-22 14:31:24,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 260. [2021-11-22 14:31:24,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 1.4517374517374517) internal successors, (376), 259 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:24,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 376 transitions. [2021-11-22 14:31:24,770 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 376 transitions. Word has length 28 [2021-11-22 14:31:24,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:31:24,770 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 376 transitions. [2021-11-22 14:31:24,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 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) [2021-11-22 14:31:24,771 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 376 transitions. [2021-11-22 14:31:24,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-22 14:31:24,779 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:31:24,780 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] [2021-11-22 14:31:24,795 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-22 14:31:24,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 14:31:24,991 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:31:24,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:31:24,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1899874836, now seen corresponding path program 1 times [2021-11-22 14:31:24,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 14:31:24,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [899839431] [2021-11-22 14:31:24,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:31:24,993 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 14:31:24,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 14:31:24,994 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 14:31:24,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-22 14:31:25,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:31:25,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-22 14:31:25,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:31:25,165 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:31:25,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:31:25,237 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:31:25,238 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 14:31:25,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [899839431] [2021-11-22 14:31:25,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [899839431] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-22 14:31:25,238 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:31:25,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-22 14:31:25,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054040725] [2021-11-22 14:31:25,239 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-22 14:31:25,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 14:31:25,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 14:31:25,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 14:31:25,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-22 14:31:25,241 INFO L87 Difference]: Start difference. First operand 260 states and 376 transitions. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:25,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:31:25,352 INFO L93 Difference]: Finished difference Result 578 states and 860 transitions. [2021-11-22 14:31:25,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 14:31:25,352 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-11-22 14:31:25,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:31:25,355 INFO L225 Difference]: With dead ends: 578 [2021-11-22 14:31:25,355 INFO L226 Difference]: Without dead ends: 341 [2021-11-22 14:31:25,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 80 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-22 14:31:25,357 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 31 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 14:31:25,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 64 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 77 Invalid, 0 Unknown, 63 Unchecked, 0.1s Time] [2021-11-22 14:31:25,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2021-11-22 14:31:25,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 321. [2021-11-22 14:31:25,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 320 states have (on average 1.378125) internal successors, (441), 320 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:25,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 441 transitions. [2021-11-22 14:31:25,374 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 441 transitions. Word has length 43 [2021-11-22 14:31:25,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:31:25,374 INFO L470 AbstractCegarLoop]: Abstraction has 321 states and 441 transitions. [2021-11-22 14:31:25,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:25,375 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 441 transitions. [2021-11-22 14:31:25,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-22 14:31:25,376 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:31:25,377 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] [2021-11-22 14:31:25,392 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-22 14:31:25,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 14:31:25,589 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:31:25,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:31:25,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1296972944, now seen corresponding path program 1 times [2021-11-22 14:31:25,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 14:31:25,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1853945221] [2021-11-22 14:31:25,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:31:25,590 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 14:31:25,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 14:31:25,591 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 14:31:25,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-22 14:31:25,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:31:25,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-22 14:31:25,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:31:25,792 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:31:25,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:31:25,938 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:31:25,939 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 14:31:25,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1853945221] [2021-11-22 14:31:25,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1853945221] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:31:25,940 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 14:31:25,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-11-22 14:31:25,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617584457] [2021-11-22 14:31:25,940 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 14:31:25,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-22 14:31:25,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 14:31:25,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-22 14:31:25,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-22 14:31:25,942 INFO L87 Difference]: Start difference. First operand 321 states and 441 transitions. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 10 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) [2021-11-22 14:31:26,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:31:26,372 INFO L93 Difference]: Finished difference Result 1203 states and 1723 transitions. [2021-11-22 14:31:26,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-22 14:31:26,374 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 10 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 44 [2021-11-22 14:31:26,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:31:26,381 INFO L225 Difference]: With dead ends: 1203 [2021-11-22 14:31:26,385 INFO L226 Difference]: Without dead ends: 905 [2021-11-22 14:31:26,386 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-11-22 14:31:26,387 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 380 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-22 14:31:26,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [380 Valid, 415 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-22 14:31:26,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 905 states. [2021-11-22 14:31:26,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 905 to 438. [2021-11-22 14:31:26,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 437 states have (on average 1.4393592677345537) internal successors, (629), 437 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:26,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 629 transitions. [2021-11-22 14:31:26,431 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 629 transitions. Word has length 44 [2021-11-22 14:31:26,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:31:26,433 INFO L470 AbstractCegarLoop]: Abstraction has 438 states and 629 transitions. [2021-11-22 14:31:26,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 10 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) [2021-11-22 14:31:26,433 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 629 transitions. [2021-11-22 14:31:26,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-22 14:31:26,436 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:31:26,437 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] [2021-11-22 14:31:26,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-22 14:31:26,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 14:31:26,652 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:31:26,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:31:26,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1555138382, now seen corresponding path program 1 times [2021-11-22 14:31:26,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 14:31:26,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1899626836] [2021-11-22 14:31:26,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:31:26,653 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 14:31:26,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 14:31:26,655 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 14:31:26,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-22 14:31:26,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:31:26,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-22 14:31:26,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:31:27,005 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:31:27,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:31:27,227 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:31:27,227 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 14:31:27,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1899626836] [2021-11-22 14:31:27,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1899626836] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:31:27,228 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 14:31:27,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-11-22 14:31:27,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655536258] [2021-11-22 14:31:27,230 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 14:31:27,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-22 14:31:27,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 14:31:27,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-22 14:31:27,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-11-22 14:31:27,233 INFO L87 Difference]: Start difference. First operand 438 states and 629 transitions. Second operand has 10 states, 10 states have (on average 8.2) internal successors, (82), 10 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) [2021-11-22 14:31:27,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:31:27,657 INFO L93 Difference]: Finished difference Result 1402 states and 2227 transitions. [2021-11-22 14:31:27,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-22 14:31:27,658 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 8.2) internal successors, (82), 10 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 44 [2021-11-22 14:31:27,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:31:27,665 INFO L225 Difference]: With dead ends: 1402 [2021-11-22 14:31:27,665 INFO L226 Difference]: Without dead ends: 984 [2021-11-22 14:31:27,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2021-11-22 14:31:27,669 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 315 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-22 14:31:27,670 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [315 Valid, 78 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-22 14:31:27,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 984 states. [2021-11-22 14:31:27,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 984 to 746. [2021-11-22 14:31:27,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 746 states, 745 states have (on average 1.4697986577181208) internal successors, (1095), 745 states have internal predecessors, (1095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:27,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 1095 transitions. [2021-11-22 14:31:27,728 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 1095 transitions. Word has length 44 [2021-11-22 14:31:27,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:31:27,728 INFO L470 AbstractCegarLoop]: Abstraction has 746 states and 1095 transitions. [2021-11-22 14:31:27,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.2) internal successors, (82), 10 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) [2021-11-22 14:31:27,729 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 1095 transitions. [2021-11-22 14:31:27,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-22 14:31:27,731 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:31:27,731 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:31:27,745 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-22 14:31:27,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 14:31:27,940 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:31:27,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:31:27,941 INFO L85 PathProgramCache]: Analyzing trace with hash 464635188, now seen corresponding path program 1 times [2021-11-22 14:31:27,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 14:31:27,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1363799797] [2021-11-22 14:31:27,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:31:27,942 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 14:31:27,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 14:31:27,943 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 14:31:27,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-22 14:31:28,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:31:28,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-22 14:31:28,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:31:28,322 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 65 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-22 14:31:28,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:31:28,498 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 68 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-22 14:31:28,499 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 14:31:28,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1363799797] [2021-11-22 14:31:28,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1363799797] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:31:28,499 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 14:31:28,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-11-22 14:31:28,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084100847] [2021-11-22 14:31:28,500 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 14:31:28,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-22 14:31:28,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 14:31:28,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-22 14:31:28,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-22 14:31:28,501 INFO L87 Difference]: Start difference. First operand 746 states and 1095 transitions. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:28,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:31:28,795 INFO L93 Difference]: Finished difference Result 1828 states and 2554 transitions. [2021-11-22 14:31:28,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-22 14:31:28,796 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-22 14:31:28,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:31:28,804 INFO L225 Difference]: With dead ends: 1828 [2021-11-22 14:31:28,805 INFO L226 Difference]: Without dead ends: 1105 [2021-11-22 14:31:28,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-11-22 14:31:28,809 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 172 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 14:31:28,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 329 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 14:31:28,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1105 states. [2021-11-22 14:31:28,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1105 to 699. [2021-11-22 14:31:28,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 699 states, 698 states have (on average 1.4126074498567336) internal successors, (986), 698 states have internal predecessors, (986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:28,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 699 states to 699 states and 986 transitions. [2021-11-22 14:31:28,850 INFO L78 Accepts]: Start accepts. Automaton has 699 states and 986 transitions. Word has length 70 [2021-11-22 14:31:28,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:31:28,851 INFO L470 AbstractCegarLoop]: Abstraction has 699 states and 986 transitions. [2021-11-22 14:31:28,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:28,851 INFO L276 IsEmpty]: Start isEmpty. Operand 699 states and 986 transitions. [2021-11-22 14:31:28,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-22 14:31:28,854 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:31:28,854 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:31:28,865 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-22 14:31:29,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 14:31:29,064 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:31:29,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:31:29,065 INFO L85 PathProgramCache]: Analyzing trace with hash 605183798, now seen corresponding path program 2 times [2021-11-22 14:31:29,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 14:31:29,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [494722487] [2021-11-22 14:31:29,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 14:31:29,066 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 14:31:29,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 14:31:29,067 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 14:31:29,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-22 14:31:29,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 14:31:29,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:31:29,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-22 14:31:29,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:31:33,436 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:31:33,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:31:36,627 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:31:36,627 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 14:31:36,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [494722487] [2021-11-22 14:31:36,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [494722487] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:31:36,627 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 14:31:36,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 44 [2021-11-22 14:31:36,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517836535] [2021-11-22 14:31:36,628 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 14:31:36,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-22 14:31:36,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 14:31:36,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-22 14:31:36,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1750, Unknown=0, NotChecked=0, Total=1892 [2021-11-22 14:31:36,631 INFO L87 Difference]: Start difference. First operand 699 states and 986 transitions. Second operand has 44 states, 44 states have (on average 3.1363636363636362) internal successors, (138), 44 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:53,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:31:53,139 INFO L93 Difference]: Finished difference Result 3287 states and 4454 transitions. [2021-11-22 14:31:53,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-11-22 14:31:53,140 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.1363636363636362) internal successors, (138), 44 states have internal predecessors, (138), 0 states have call successors, (0), 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 70 [2021-11-22 14:31:53,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:31:53,157 INFO L225 Difference]: With dead ends: 3287 [2021-11-22 14:31:53,157 INFO L226 Difference]: Without dead ends: 3007 [2021-11-22 14:31:53,165 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3007 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=2500, Invalid=12506, Unknown=0, NotChecked=0, Total=15006 [2021-11-22 14:31:53,166 INFO L933 BasicCegarLoop]: 502 mSDtfsCounter, 2091 mSDsluCounter, 11093 mSDsCounter, 0 mSdLazyCounter, 6255 mSolverCounterSat, 498 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2091 SdHoareTripleChecker+Valid, 11595 SdHoareTripleChecker+Invalid, 6753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 498 IncrementalHoareTripleChecker+Valid, 6255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2021-11-22 14:31:53,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2091 Valid, 11595 Invalid, 6753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [498 Valid, 6255 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2021-11-22 14:31:53,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3007 states. [2021-11-22 14:31:53,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3007 to 1405. [2021-11-22 14:31:53,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1405 states, 1404 states have (on average 1.4586894586894588) internal successors, (2048), 1404 states have internal predecessors, (2048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:53,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1405 states to 1405 states and 2048 transitions. [2021-11-22 14:31:53,250 INFO L78 Accepts]: Start accepts. Automaton has 1405 states and 2048 transitions. Word has length 70 [2021-11-22 14:31:53,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:31:53,250 INFO L470 AbstractCegarLoop]: Abstraction has 1405 states and 2048 transitions. [2021-11-22 14:31:53,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.1363636363636362) internal successors, (138), 44 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:31:53,251 INFO L276 IsEmpty]: Start isEmpty. Operand 1405 states and 2048 transitions. [2021-11-22 14:31:53,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-22 14:31:53,253 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:31:53,253 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:31:53,267 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-22 14:31:53,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 14:31:53,464 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:31:53,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:31:53,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1235371034, now seen corresponding path program 1 times [2021-11-22 14:31:53,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 14:31:53,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1219967676] [2021-11-22 14:31:53,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:31:53,465 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 14:31:53,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 14:31:53,466 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 14:31:53,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-22 14:31:53,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:31:53,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-22 14:31:53,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:31:57,129 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:31:57,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:32:00,706 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:32:00,706 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 14:32:00,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1219967676] [2021-11-22 14:32:00,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1219967676] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:32:00,707 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 14:32:00,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-11-22 14:32:00,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879156406] [2021-11-22 14:32:00,708 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 14:32:00,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-22 14:32:00,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 14:32:00,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-22 14:32:00,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1921, Unknown=0, NotChecked=0, Total=2070 [2021-11-22 14:32:00,710 INFO L87 Difference]: Start difference. First operand 1405 states and 2048 transitions. Second operand has 46 states, 46 states have (on average 3.1739130434782608) internal successors, (146), 46 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:32:59,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:32:59,651 INFO L93 Difference]: Finished difference Result 7516 states and 10072 transitions. [2021-11-22 14:32:59,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 224 states. [2021-11-22 14:32:59,659 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.1739130434782608) internal successors, (146), 46 states have internal predecessors, (146), 0 states have call successors, (0), 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 74 [2021-11-22 14:32:59,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:32:59,696 INFO L225 Difference]: With dead ends: 7516 [2021-11-22 14:32:59,696 INFO L226 Difference]: Without dead ends: 6731 [2021-11-22 14:32:59,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 265 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23597 ImplicationChecksByTransitivity, 48.7s TimeCoverageRelationStatistics Valid=8884, Invalid=62138, Unknown=0, NotChecked=0, Total=71022 [2021-11-22 14:32:59,713 INFO L933 BasicCegarLoop]: 902 mSDtfsCounter, 2874 mSDsluCounter, 20333 mSDsCounter, 0 mSdLazyCounter, 12647 mSolverCounterSat, 692 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2874 SdHoareTripleChecker+Valid, 21235 SdHoareTripleChecker+Invalid, 13339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 692 IncrementalHoareTripleChecker+Valid, 12647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.2s IncrementalHoareTripleChecker+Time [2021-11-22 14:32:59,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2874 Valid, 21235 Invalid, 13339 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [692 Valid, 12647 Invalid, 0 Unknown, 0 Unchecked, 13.2s Time] [2021-11-22 14:32:59,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6731 states. [2021-11-22 14:32:59,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6731 to 3258. [2021-11-22 14:32:59,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3258 states, 3257 states have (on average 1.4501074608535462) internal successors, (4723), 3257 states have internal predecessors, (4723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:32:59,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3258 states to 3258 states and 4723 transitions. [2021-11-22 14:32:59,986 INFO L78 Accepts]: Start accepts. Automaton has 3258 states and 4723 transitions. Word has length 74 [2021-11-22 14:32:59,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:32:59,987 INFO L470 AbstractCegarLoop]: Abstraction has 3258 states and 4723 transitions. [2021-11-22 14:32:59,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.1739130434782608) internal successors, (146), 46 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:32:59,988 INFO L276 IsEmpty]: Start isEmpty. Operand 3258 states and 4723 transitions. [2021-11-22 14:33:00,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-22 14:33:00,024 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:33:00,024 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:33:00,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-22 14:33:00,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 14:33:00,225 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:33:00,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:33:00,226 INFO L85 PathProgramCache]: Analyzing trace with hash -877944922, now seen corresponding path program 1 times [2021-11-22 14:33:00,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 14:33:00,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [204049187] [2021-11-22 14:33:00,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:33:00,227 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 14:33:00,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 14:33:00,227 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 14:33:00,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-22 14:33:00,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:33:00,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-22 14:33:00,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:33:03,648 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:33:03,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:33:06,674 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:33:06,674 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 14:33:06,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [204049187] [2021-11-22 14:33:06,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [204049187] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:33:06,674 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 14:33:06,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-11-22 14:33:06,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494017580] [2021-11-22 14:33:06,675 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 14:33:06,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-22 14:33:06,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 14:33:06,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-22 14:33:06,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1933, Unknown=0, NotChecked=0, Total=2070 [2021-11-22 14:33:06,677 INFO L87 Difference]: Start difference. First operand 3258 states and 4723 transitions. Second operand has 46 states, 46 states have (on average 3.1739130434782608) internal successors, (146), 46 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:33:31,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:33:31,695 INFO L93 Difference]: Finished difference Result 6700 states and 9207 transitions. [2021-11-22 14:33:31,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-11-22 14:33:31,696 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.1739130434782608) internal successors, (146), 46 states have internal predecessors, (146), 0 states have call successors, (0), 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 74 [2021-11-22 14:33:31,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:33:31,727 INFO L225 Difference]: With dead ends: 6700 [2021-11-22 14:33:31,727 INFO L226 Difference]: Without dead ends: 5876 [2021-11-22 14:33:31,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5091 ImplicationChecksByTransitivity, 20.6s TimeCoverageRelationStatistics Valid=2615, Invalid=18265, Unknown=0, NotChecked=0, Total=20880 [2021-11-22 14:33:31,731 INFO L933 BasicCegarLoop]: 536 mSDtfsCounter, 1878 mSDsluCounter, 11223 mSDsCounter, 0 mSdLazyCounter, 6547 mSolverCounterSat, 322 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1878 SdHoareTripleChecker+Valid, 11759 SdHoareTripleChecker+Invalid, 6869 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 322 IncrementalHoareTripleChecker+Valid, 6547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2021-11-22 14:33:31,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1878 Valid, 11759 Invalid, 6869 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [322 Valid, 6547 Invalid, 0 Unknown, 0 Unchecked, 7.2s Time] [2021-11-22 14:33:31,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5876 states. [2021-11-22 14:33:31,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5876 to 3451. [2021-11-22 14:33:31,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3451 states, 3450 states have (on average 1.447536231884058) internal successors, (4994), 3450 states have internal predecessors, (4994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:33:31,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3451 states to 3451 states and 4994 transitions. [2021-11-22 14:33:31,964 INFO L78 Accepts]: Start accepts. Automaton has 3451 states and 4994 transitions. Word has length 74 [2021-11-22 14:33:31,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:33:31,964 INFO L470 AbstractCegarLoop]: Abstraction has 3451 states and 4994 transitions. [2021-11-22 14:33:31,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.1739130434782608) internal successors, (146), 46 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:33:31,965 INFO L276 IsEmpty]: Start isEmpty. Operand 3451 states and 4994 transitions. [2021-11-22 14:33:31,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-22 14:33:31,973 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:33:31,973 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:33:31,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-22 14:33:32,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 14:33:32,184 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:33:32,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:33:32,185 INFO L85 PathProgramCache]: Analyzing trace with hash -904299993, now seen corresponding path program 1 times [2021-11-22 14:33:32,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 14:33:32,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [841382099] [2021-11-22 14:33:32,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:33:32,185 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 14:33:32,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 14:33:32,186 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 14:33:32,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-22 14:33:32,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:33:32,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-22 14:33:32,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:33:32,592 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 23 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:33:32,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:33:32,806 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 23 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:33:32,807 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 14:33:32,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [841382099] [2021-11-22 14:33:32,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [841382099] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:33:32,807 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 14:33:32,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-11-22 14:33:32,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599787328] [2021-11-22 14:33:32,807 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 14:33:32,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-22 14:33:32,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 14:33:32,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-22 14:33:32,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-11-22 14:33:32,808 INFO L87 Difference]: Start difference. First operand 3451 states and 4994 transitions. Second operand has 12 states, 12 states have (on average 10.583333333333334) internal successors, (127), 12 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:33:33,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:33:33,103 INFO L93 Difference]: Finished difference Result 3853 states and 5527 transitions. [2021-11-22 14:33:33,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-22 14:33:33,106 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 10.583333333333334) internal successors, (127), 12 states have internal predecessors, (127), 0 states have call successors, (0), 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 76 [2021-11-22 14:33:33,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:33:33,124 INFO L225 Difference]: With dead ends: 3853 [2021-11-22 14:33:33,125 INFO L226 Difference]: Without dead ends: 3823 [2021-11-22 14:33:33,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-11-22 14:33:33,127 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 14 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 117 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 14:33:33,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 160 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 46 Invalid, 0 Unknown, 117 Unchecked, 0.1s Time] [2021-11-22 14:33:33,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3823 states. [2021-11-22 14:33:33,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3823 to 3754. [2021-11-22 14:33:33,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3754 states, 3753 states have (on average 1.4436450839328536) internal successors, (5418), 3753 states have internal predecessors, (5418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:33:33,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3754 states to 3754 states and 5418 transitions. [2021-11-22 14:33:33,397 INFO L78 Accepts]: Start accepts. Automaton has 3754 states and 5418 transitions. Word has length 76 [2021-11-22 14:33:33,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:33:33,398 INFO L470 AbstractCegarLoop]: Abstraction has 3754 states and 5418 transitions. [2021-11-22 14:33:33,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.583333333333334) internal successors, (127), 12 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:33:33,398 INFO L276 IsEmpty]: Start isEmpty. Operand 3754 states and 5418 transitions. [2021-11-22 14:33:33,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-22 14:33:33,402 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:33:33,402 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:33:33,413 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-22 14:33:33,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 14:33:33,613 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:33:33,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:33:33,614 INFO L85 PathProgramCache]: Analyzing trace with hash -1461199560, now seen corresponding path program 1 times [2021-11-22 14:33:33,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 14:33:33,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [302765421] [2021-11-22 14:33:33,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:33:33,614 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 14:33:33,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 14:33:33,615 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 14:33:33,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-22 14:33:33,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:33:33,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-22 14:33:33,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:33:37,993 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:33:37,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:33:42,894 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:33:42,895 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 14:33:42,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [302765421] [2021-11-22 14:33:42,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [302765421] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:33:42,895 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 14:33:42,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2021-11-22 14:33:42,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255561208] [2021-11-22 14:33:42,896 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 14:33:42,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-22 14:33:42,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 14:33:42,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-22 14:33:42,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=2275, Unknown=0, NotChecked=0, Total=2450 [2021-11-22 14:33:42,898 INFO L87 Difference]: Start difference. First operand 3754 states and 5418 transitions. Second operand has 50 states, 50 states have (on average 3.04) internal successors, (152), 50 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:34:31,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:34:31,286 INFO L93 Difference]: Finished difference Result 6117 states and 8538 transitions. [2021-11-22 14:34:31,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2021-11-22 14:34:31,287 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.04) internal successors, (152), 50 states have internal predecessors, (152), 0 states have call successors, (0), 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 77 [2021-11-22 14:34:31,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:34:31,307 INFO L225 Difference]: With dead ends: 6117 [2021-11-22 14:34:31,308 INFO L226 Difference]: Without dead ends: 5915 [2021-11-22 14:34:31,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10894 ImplicationChecksByTransitivity, 43.6s TimeCoverageRelationStatistics Valid=4854, Invalid=34548, Unknown=0, NotChecked=0, Total=39402 [2021-11-22 14:34:31,313 INFO L933 BasicCegarLoop]: 453 mSDtfsCounter, 2434 mSDsluCounter, 10953 mSDsCounter, 0 mSdLazyCounter, 6537 mSolverCounterSat, 514 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2434 SdHoareTripleChecker+Valid, 11406 SdHoareTripleChecker+Invalid, 7051 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 514 IncrementalHoareTripleChecker+Valid, 6537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.4s IncrementalHoareTripleChecker+Time [2021-11-22 14:34:31,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2434 Valid, 11406 Invalid, 7051 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [514 Valid, 6537 Invalid, 0 Unknown, 0 Unchecked, 9.4s Time] [2021-11-22 14:34:31,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5915 states. [2021-11-22 14:34:31,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5915 to 4353. [2021-11-22 14:34:31,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4353 states, 4352 states have (on average 1.4418658088235294) internal successors, (6275), 4352 states have internal predecessors, (6275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:34:31,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4353 states to 4353 states and 6275 transitions. [2021-11-22 14:34:31,608 INFO L78 Accepts]: Start accepts. Automaton has 4353 states and 6275 transitions. Word has length 77 [2021-11-22 14:34:31,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:34:31,608 INFO L470 AbstractCegarLoop]: Abstraction has 4353 states and 6275 transitions. [2021-11-22 14:34:31,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.04) internal successors, (152), 50 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:34:31,609 INFO L276 IsEmpty]: Start isEmpty. Operand 4353 states and 6275 transitions. [2021-11-22 14:34:31,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-22 14:34:31,613 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:34:31,613 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:34:31,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-22 14:34:31,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 14:34:31,824 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:34:31,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:34:31,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1072504456, now seen corresponding path program 2 times [2021-11-22 14:34:31,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 14:34:31,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [167621941] [2021-11-22 14:34:31,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 14:34:31,825 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 14:34:31,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 14:34:31,826 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 14:34:31,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-22 14:34:31,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 14:34:31,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:34:31,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-22 14:34:31,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:34:36,176 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:34:36,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:34:40,346 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:34:40,346 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 14:34:40,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [167621941] [2021-11-22 14:34:40,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [167621941] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:34:40,346 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 14:34:40,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2021-11-22 14:34:40,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462315365] [2021-11-22 14:34:40,347 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 14:34:40,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-22 14:34:40,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 14:34:40,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-22 14:34:40,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=2268, Unknown=0, NotChecked=0, Total=2450 [2021-11-22 14:34:40,348 INFO L87 Difference]: Start difference. First operand 4353 states and 6275 transitions. Second operand has 50 states, 50 states have (on average 3.04) internal successors, (152), 50 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:36:19,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:36:19,904 INFO L93 Difference]: Finished difference Result 10347 states and 14360 transitions. [2021-11-22 14:36:19,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 281 states. [2021-11-22 14:36:19,904 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.04) internal successors, (152), 50 states have internal predecessors, (152), 0 states have call successors, (0), 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 77 [2021-11-22 14:36:19,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:36:19,916 INFO L225 Difference]: With dead ends: 10347 [2021-11-22 14:36:19,917 INFO L226 Difference]: Without dead ends: 9534 [2021-11-22 14:36:19,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 326 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38412 ImplicationChecksByTransitivity, 87.7s TimeCoverageRelationStatistics Valid=11891, Invalid=95365, Unknown=0, NotChecked=0, Total=107256 [2021-11-22 14:36:19,926 INFO L933 BasicCegarLoop]: 752 mSDtfsCounter, 2749 mSDsluCounter, 17544 mSDsCounter, 0 mSdLazyCounter, 10835 mSolverCounterSat, 754 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2749 SdHoareTripleChecker+Valid, 18296 SdHoareTripleChecker+Invalid, 11589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 754 IncrementalHoareTripleChecker+Valid, 10835 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.0s IncrementalHoareTripleChecker+Time [2021-11-22 14:36:19,926 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2749 Valid, 18296 Invalid, 11589 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [754 Valid, 10835 Invalid, 0 Unknown, 0 Unchecked, 15.0s Time] [2021-11-22 14:36:19,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9534 states. [2021-11-22 14:36:20,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9534 to 6117. [2021-11-22 14:36:20,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6117 states, 6116 states have (on average 1.4529103989535643) internal successors, (8886), 6116 states have internal predecessors, (8886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:36:20,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6117 states to 6117 states and 8886 transitions. [2021-11-22 14:36:20,373 INFO L78 Accepts]: Start accepts. Automaton has 6117 states and 8886 transitions. Word has length 77 [2021-11-22 14:36:20,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:36:20,373 INFO L470 AbstractCegarLoop]: Abstraction has 6117 states and 8886 transitions. [2021-11-22 14:36:20,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.04) internal successors, (152), 50 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:36:20,374 INFO L276 IsEmpty]: Start isEmpty. Operand 6117 states and 8886 transitions. [2021-11-22 14:36:20,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-22 14:36:20,381 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:36:20,382 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:36:20,395 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-22 14:36:20,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 14:36:20,592 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:36:20,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:36:20,592 INFO L85 PathProgramCache]: Analyzing trace with hash -652353288, now seen corresponding path program 3 times [2021-11-22 14:36:20,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 14:36:20,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1749805454] [2021-11-22 14:36:20,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-22 14:36:20,593 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 14:36:20,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 14:36:20,594 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 14:36:20,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-22 14:36:20,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-22 14:36:20,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:36:20,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-22 14:36:20,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:36:24,891 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:36:24,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:36:29,104 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:36:29,105 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 14:36:29,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1749805454] [2021-11-22 14:36:29,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1749805454] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:36:29,105 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 14:36:29,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 49 [2021-11-22 14:36:29,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13064077] [2021-11-22 14:36:29,106 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 14:36:29,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-22 14:36:29,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 14:36:29,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-22 14:36:29,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=2197, Unknown=0, NotChecked=0, Total=2352 [2021-11-22 14:36:29,108 INFO L87 Difference]: Start difference. First operand 6117 states and 8886 transitions. Second operand has 49 states, 49 states have (on average 3.1020408163265305) internal successors, (152), 49 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:37:47,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:37:47,522 INFO L93 Difference]: Finished difference Result 13384 states and 18917 transitions. [2021-11-22 14:37:47,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2021-11-22 14:37:47,523 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.1020408163265305) internal successors, (152), 49 states have internal predecessors, (152), 0 states have call successors, (0), 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 77 [2021-11-22 14:37:47,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:37:47,541 INFO L225 Difference]: With dead ends: 13384 [2021-11-22 14:37:47,541 INFO L226 Difference]: Without dead ends: 10813 [2021-11-22 14:37:47,549 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 246 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19875 ImplicationChecksByTransitivity, 68.7s TimeCoverageRelationStatistics Valid=9162, Invalid=52094, Unknown=0, NotChecked=0, Total=61256 [2021-11-22 14:37:47,550 INFO L933 BasicCegarLoop]: 670 mSDtfsCounter, 2685 mSDsluCounter, 15637 mSDsCounter, 0 mSdLazyCounter, 9241 mSolverCounterSat, 680 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2685 SdHoareTripleChecker+Valid, 16307 SdHoareTripleChecker+Invalid, 9921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 680 IncrementalHoareTripleChecker+Valid, 9241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.0s IncrementalHoareTripleChecker+Time [2021-11-22 14:37:47,550 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2685 Valid, 16307 Invalid, 9921 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [680 Valid, 9241 Invalid, 0 Unknown, 0 Unchecked, 13.0s Time] [2021-11-22 14:37:47,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10813 states. [2021-11-22 14:37:48,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10813 to 7443. [2021-11-22 14:37:48,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7443 states, 7442 states have (on average 1.4545821015855953) internal successors, (10825), 7442 states have internal predecessors, (10825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:37:48,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7443 states to 7443 states and 10825 transitions. [2021-11-22 14:37:48,095 INFO L78 Accepts]: Start accepts. Automaton has 7443 states and 10825 transitions. Word has length 77 [2021-11-22 14:37:48,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:37:48,096 INFO L470 AbstractCegarLoop]: Abstraction has 7443 states and 10825 transitions. [2021-11-22 14:37:48,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.1020408163265305) internal successors, (152), 49 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:37:48,096 INFO L276 IsEmpty]: Start isEmpty. Operand 7443 states and 10825 transitions. [2021-11-22 14:37:48,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-22 14:37:48,103 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:37:48,104 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:37:48,119 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-22 14:37:48,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 14:37:48,316 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:37:48,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:37:48,317 INFO L85 PathProgramCache]: Analyzing trace with hash -305352451, now seen corresponding path program 1 times [2021-11-22 14:37:48,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 14:37:48,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2114763088] [2021-11-22 14:37:48,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:37:48,320 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 14:37:48,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 14:37:48,321 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 14:37:48,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-22 14:37:48,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:37:48,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-22 14:37:48,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:37:49,160 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 59 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:37:49,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:37:50,011 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 37 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:37:50,011 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 14:37:50,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2114763088] [2021-11-22 14:37:50,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2114763088] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:37:50,012 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 14:37:50,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-11-22 14:37:50,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050753449] [2021-11-22 14:37:50,013 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 14:37:50,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-22 14:37:50,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 14:37:50,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-22 14:37:50,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=428, Unknown=0, NotChecked=0, Total=552 [2021-11-22 14:37:50,014 INFO L87 Difference]: Start difference. First operand 7443 states and 10825 transitions. Second operand has 24 states, 24 states have (on average 5.958333333333333) internal successors, (143), 24 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:37:51,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:37:51,331 INFO L93 Difference]: Finished difference Result 11717 states and 16829 transitions. [2021-11-22 14:37:51,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-22 14:37:51,332 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.958333333333333) internal successors, (143), 24 states have internal predecessors, (143), 0 states have call successors, (0), 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 [2021-11-22 14:37:51,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:37:51,345 INFO L225 Difference]: With dead ends: 11717 [2021-11-22 14:37:51,345 INFO L226 Difference]: Without dead ends: 8256 [2021-11-22 14:37:51,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=258, Invalid=932, Unknown=0, NotChecked=0, Total=1190 [2021-11-22 14:37:51,350 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 436 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 805 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 1315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 805 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 490 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-22 14:37:51,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [436 Valid, 362 Invalid, 1315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 805 Invalid, 0 Unknown, 490 Unchecked, 0.5s Time] [2021-11-22 14:37:51,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8256 states. [2021-11-22 14:37:51,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8256 to 7981. [2021-11-22 14:37:51,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7981 states, 7980 states have (on average 1.4444862155388472) internal successors, (11527), 7980 states have internal predecessors, (11527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:37:51,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7981 states to 7981 states and 11527 transitions. [2021-11-22 14:37:51,912 INFO L78 Accepts]: Start accepts. Automaton has 7981 states and 11527 transitions. Word has length 79 [2021-11-22 14:37:51,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:37:51,912 INFO L470 AbstractCegarLoop]: Abstraction has 7981 states and 11527 transitions. [2021-11-22 14:37:51,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.958333333333333) internal successors, (143), 24 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:37:51,913 INFO L276 IsEmpty]: Start isEmpty. Operand 7981 states and 11527 transitions. [2021-11-22 14:37:51,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-22 14:37:51,921 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:37:51,921 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:37:51,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-22 14:37:52,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 14:37:52,132 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:37:52,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:37:52,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1794630633, now seen corresponding path program 1 times [2021-11-22 14:37:52,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 14:37:52,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [434697105] [2021-11-22 14:37:52,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:37:52,133 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 14:37:52,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 14:37:52,134 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 14:37:52,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-22 14:37:52,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:37:52,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-22 14:37:52,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:37:56,459 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:37:56,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:38:01,979 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:38:01,979 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 14:38:01,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [434697105] [2021-11-22 14:38:01,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [434697105] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:38:01,980 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 14:38:01,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2021-11-22 14:38:01,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407311077] [2021-11-22 14:38:01,980 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 14:38:01,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-22 14:38:01,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 14:38:01,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-22 14:38:01,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=2280, Unknown=0, NotChecked=0, Total=2450 [2021-11-22 14:38:01,982 INFO L87 Difference]: Start difference. First operand 7981 states and 11527 transitions. Second operand has 50 states, 50 states have (on average 3.16) internal successors, (158), 50 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:40:38,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:40:38,461 INFO L93 Difference]: Finished difference Result 14067 states and 19509 transitions. [2021-11-22 14:40:38,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 333 states. [2021-11-22 14:40:38,462 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.16) internal successors, (158), 50 states have internal predecessors, (158), 0 states have call successors, (0), 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 [2021-11-22 14:40:38,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:40:38,477 INFO L225 Difference]: With dead ends: 14067 [2021-11-22 14:40:38,477 INFO L226 Difference]: Without dead ends: 13851 [2021-11-22 14:40:38,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 377 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55356 ImplicationChecksByTransitivity, 140.0s TimeCoverageRelationStatistics Valid=15661, Invalid=127601, Unknown=0, NotChecked=0, Total=143262 [2021-11-22 14:40:38,489 INFO L933 BasicCegarLoop]: 770 mSDtfsCounter, 3653 mSDsluCounter, 20149 mSDsCounter, 0 mSdLazyCounter, 12607 mSolverCounterSat, 1292 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3653 SdHoareTripleChecker+Valid, 20919 SdHoareTripleChecker+Invalid, 13899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1292 IncrementalHoareTripleChecker+Valid, 12607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.4s IncrementalHoareTripleChecker+Time [2021-11-22 14:40:38,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3653 Valid, 20919 Invalid, 13899 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1292 Valid, 12607 Invalid, 0 Unknown, 0 Unchecked, 20.4s Time] [2021-11-22 14:40:38,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13851 states. [2021-11-22 14:40:39,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13851 to 9508. [2021-11-22 14:40:39,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9508 states, 9507 states have (on average 1.447880509098559) internal successors, (13765), 9507 states have internal predecessors, (13765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:40:39,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9508 states to 9508 states and 13765 transitions. [2021-11-22 14:40:39,145 INFO L78 Accepts]: Start accepts. Automaton has 9508 states and 13765 transitions. Word has length 80 [2021-11-22 14:40:39,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:40:39,145 INFO L470 AbstractCegarLoop]: Abstraction has 9508 states and 13765 transitions. [2021-11-22 14:40:39,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.16) internal successors, (158), 50 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:40:39,146 INFO L276 IsEmpty]: Start isEmpty. Operand 9508 states and 13765 transitions. [2021-11-22 14:40:39,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-22 14:40:39,154 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:40:39,155 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:40:39,165 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-11-22 14:40:39,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 14:40:39,365 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:40:39,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:40:39,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1519845463, now seen corresponding path program 2 times [2021-11-22 14:40:39,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 14:40:39,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1275629291] [2021-11-22 14:40:39,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 14:40:39,366 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 14:40:39,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 14:40:39,367 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 14:40:39,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-22 14:40:39,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 14:40:39,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:40:39,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-22 14:40:39,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:40:43,744 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:40:43,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:40:48,725 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:40:48,725 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 14:40:48,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1275629291] [2021-11-22 14:40:48,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1275629291] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:40:48,725 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 14:40:48,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2021-11-22 14:40:48,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185260027] [2021-11-22 14:40:48,726 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 14:40:48,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-22 14:40:48,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 14:40:48,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-22 14:40:48,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=2290, Unknown=0, NotChecked=0, Total=2450 [2021-11-22 14:40:48,727 INFO L87 Difference]: Start difference. First operand 9508 states and 13765 transitions. Second operand has 50 states, 50 states have (on average 3.16) internal successors, (158), 50 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:43:53,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:43:53,147 INFO L93 Difference]: Finished difference Result 22634 states and 31202 transitions. [2021-11-22 14:43:53,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 381 states. [2021-11-22 14:43:53,148 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.16) internal successors, (158), 50 states have internal predecessors, (158), 0 states have call successors, (0), 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 [2021-11-22 14:43:53,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:43:53,166 INFO L225 Difference]: With dead ends: 22634 [2021-11-22 14:43:53,166 INFO L226 Difference]: Without dead ends: 20189 [2021-11-22 14:43:53,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 535 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 425 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71391 ImplicationChecksByTransitivity, 159.4s TimeCoverageRelationStatistics Valid=19269, Invalid=162633, Unknown=0, NotChecked=0, Total=181902 [2021-11-22 14:43:53,184 INFO L933 BasicCegarLoop]: 1130 mSDtfsCounter, 3152 mSDsluCounter, 28380 mSDsCounter, 0 mSdLazyCounter, 18373 mSolverCounterSat, 1009 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3152 SdHoareTripleChecker+Valid, 29510 SdHoareTripleChecker+Invalid, 19382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1009 IncrementalHoareTripleChecker+Valid, 18373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27.3s IncrementalHoareTripleChecker+Time [2021-11-22 14:43:53,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3152 Valid, 29510 Invalid, 19382 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1009 Valid, 18373 Invalid, 0 Unknown, 0 Unchecked, 27.3s Time] [2021-11-22 14:43:53,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20189 states. [2021-11-22 14:43:53,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20189 to 12156. [2021-11-22 14:43:53,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12156 states, 12155 states have (on average 1.4571781160016455) internal successors, (17712), 12155 states have internal predecessors, (17712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:43:53,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12156 states to 12156 states and 17712 transitions. [2021-11-22 14:43:53,990 INFO L78 Accepts]: Start accepts. Automaton has 12156 states and 17712 transitions. Word has length 80 [2021-11-22 14:43:53,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:43:53,991 INFO L470 AbstractCegarLoop]: Abstraction has 12156 states and 17712 transitions. [2021-11-22 14:43:53,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.16) internal successors, (158), 50 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:43:53,991 INFO L276 IsEmpty]: Start isEmpty. Operand 12156 states and 17712 transitions. [2021-11-22 14:43:53,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-22 14:43:53,999 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:43:53,999 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:43:54,010 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-11-22 14:43:54,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 14:43:54,210 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:43:54,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:43:54,210 INFO L85 PathProgramCache]: Analyzing trace with hash -825823845, now seen corresponding path program 3 times [2021-11-22 14:43:54,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 14:43:54,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [394517467] [2021-11-22 14:43:54,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-22 14:43:54,211 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 14:43:54,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 14:43:54,211 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 14:43:54,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b3b118f-3294-4789-99f4-6fca45618ad6/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-22 14:43:54,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-22 14:43:54,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:43:54,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-22 14:43:54,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:43:58,586 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:43:58,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:44:03,745 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:44:03,746 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 14:44:03,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [394517467] [2021-11-22 14:44:03,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [394517467] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:44:03,746 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 14:44:03,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2021-11-22 14:44:03,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676270649] [2021-11-22 14:44:03,747 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 14:44:03,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-22 14:44:03,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 14:44:03,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-22 14:44:03,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=2285, Unknown=0, NotChecked=0, Total=2450 [2021-11-22 14:44:03,749 INFO L87 Difference]: Start difference. First operand 12156 states and 17712 transitions. Second operand has 50 states, 50 states have (on average 3.16) internal successors, (158), 50 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)